Global Tropical Activity At 30 Year Low

A comment made by Al Gore last week, while attending a speaking engagement at ETSU, really “irked” me.  He said global warming can be blamed for an increase in tropical activity on our shores.  Once again, Mr. Gore, perhaps you should check the facts.

The fact remains that we’re actually at a 30 year low in terms of global tropical activity.  Just take a look at this graph posted below. 

Accumulated Cyclone Energy (ACE), which combines a storm's duration and its wind speed in six-hour intervals. The years 2007 and 2008 had among the lowest ACE measurements since reliable global satellite data was first available three decades ago.

Accumulated Cyclone Energy (ACE), which combines a storm's duration and its wind speed in six-hour intervals. The years 2007 and 2008 had among the lowest ACE measurements since reliable global satellite data was first available three decades ago.

 

A couple quotes from a recent USA Today article include (for the complete article please read http://www.usatoday.com/weather/storms/hurricanes/2008-11-11-hurricanes_N.htm?loc=interstitialskip):

“It tells you that from year to year you have large swings of activity,” said Maue, who plans to present his work next month at a meeting of the American Geophysical Union in San Francisco. “If you want to find a global warming signal in all that data it’s generally going to be rather small.”

Kevin Trenberth, a lead author of the 2007 Intergovernmental Panel on Climate Change assessment, was among several climatologists who made such claims. He said in 2004 that the intense hurricane season that year was “a harbinger of the future.” His prediction prompted the resignation from the panel of Chris Landsea, science and operations officer at NOAA’s National Hurricane Center, who said there was no basis to make such a prediction.

- Coming up later I’m going to post some interesting stuff from the equator.  There’s some mighty interesting data coming from down there now as all of those computer models several years ago that were touting the tropical regions around the equator would warm significantly (3-5 degrees C) during this span of time are FLAT OUT wrong.  Instead, there’s been very little warming…on the order of .5 to 1 degree C.  I’ll dig some of those charts up later this week if I get the chance between our stormy weather.

One more thing, the flooding up in Fargo is NOT because of Global Warming as a journalist stated on a cable news outlet earlier this evening.  INSTEAD THE FLOODING IS DUE TO HEAVY SNOWFALL.  (It’s almost laughable what I’m hearing coming from some folks these days.  I wonder sometimes if they stop and think before they speak) Okay, enough with this rant! 

- More later on Old Man Winter’s Return which is on deck!

House Keeping Notes

Busy evening in the weather office and the overall pattern is one that will support lots of storms and rumors of storms over the next couple of weeks.  This whole pattern should eventually end with a “whopper” of a storm sometime around the April 4th-10th time frame, complete with one more good, accumulating snow event, but more on that later.  Tonight we’re here to concentrate on the severe weather breaking out to our west.

  • Severe thunderstorms are blossoming within the current tornado watch box area, however, with a rather cool and stable air mass here in high country, I do not anticipate severe weather to be a problem in our neck of the woods.  That said, as the cold front crosses the mountains during the overnight, showers and embedded thunder will push in here followed by a sharp change to colder and windy weather for the predawn hours.

ww0093_radar

  • In the colder air mass, snow flurries and light snow will fall by Sunday afternoon across the mountains.
  • This active weather pattern will promote additional storms every few days over the next couple of weeks and rainfall will really start to “add up” over the period.  With all of last year’s dry weather, this pattern, combined with a snowy winter is just what the Dr. ordered for region.

Finally, be sure and scroll down to see some amazing storm photos sent in from Scott Lawson out of Madisonville, KY earlier this afternoon…amazing stuff!

And for those traveling south, be sure and check out our very own Joe Reedy’s weatherblog for Unicoi County.  -  Some great material there!  His blog link is http://www.erweather.wordpress.com.

Stormy Weather To Our West

Thanks to Scott Lawson for these storm photos out of Madisonville, KY- taken only a few minutes ago. Thanks, Scott!

AS ALWAYS, TO VIEW OUR COMPLETE FORECAST PACKAGE SEE WWW.MOUNTAINCITYWEATHERCENTER.COM

22

Threatening Skies Over Madisonville, KY

Threatening Skies Over Madisonville, KY

Tornado Warning In Effect- Madisonville, KY 540 PM CDT 03/28/09

Tornado Warning In Effect- Madisonville, KY 540 PM CDT 03/28/09

Tornado Watch Up To Our West

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
305 PM EDT SAT MAR 28 2009

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-290800-
CHEROKEE-CLAY-SCOTT TN-CAMPBELL-CLAIBORNE-HANCOCK-HAWKINS-
SULLIVAN-JOHNSON-MORGAN-ANDERSON-UNION-GRAINGER-HAMBLEN-
NORTHWEST COCKE-COCKE SMOKY MOUNTAINS-NORTHWEST GREENE-
SOUTHEAST GREENE-WASHINGTON TN-UNICOI-NORTHWEST CARTER-
SOUTHEAST CARTER-ROANE-LOUDON-KNOX-JEFFERSON-NW BLOUNT-
BLOUNT SMOKY MOUNTAINS-NORTH SEVIER-SEVIER SMOKY MOUNTAINS-
SEQUATCHIE-BLEDSOE-RHEA-MEIGS-MCMINN-NORTHWEST MONROE-
SOUTHEAST MONROE-MARION-HAMILTON-BRADLEY-WEST POLK-EAST POLK-LEE-
WISE-SCOTT-RUSSELL-WASHINGTON-
INCLUDING THE CITIES OF...MURPHY...HAYESVILLE...ONEIDA...
LA FOLLETTE...TAZEWELL...SNEEDVILLE...ROGERSVILLE...KINGSPORT...
BRISTOL...MOUNTAIN CITY...WARTBURG...CLINTON...OAK RIDGE...
MAYNARDVILLE...RUTLEDGE...MORRISTOWN...NEWPORT...COSBY...
GREENEVILLE...CEDAR CREEK...JOHNSON CITY...ERWIN...ELIZABETHTON...
ROAN MOUNTAIN...KINGSTON...LENOIR CITY...KNOXVILLE...DANDRIDGE...
MARYVILLE...CADES COVE...SEVIERVILLE...GATLINBURG...DUNLAP...
PIKEVILLE...DAYTON...DECATUR...ATHENS...MADISONVILLE...
COKER CREEK...JASPER...CHATTANOOGA...CLEVELAND...BENTON...
DUCKTOWN...JONESVILLE...WISE...NORTON...GATE CITY...LEBANON...
ABINGDON
305 PM EDT SAT MAR 28 2009 /205 PM CDT SAT MAR 28 2009/

...SEVERE THUNDERSTORMS POSSIBLE TONIGHT WITH POTENTIAL FOR
FREEZING TEMPERATURES SUNDAY NIGHT...

A STRONG LOW PRESSURE SYSTEM WILL MOVE NORTHEAST ACROSS THE OHIO
RIVER VALLEY TONIGHT. WARM AND MOIST AIR AHEAD OF A STRONG COLD
FRONT...WILL CAUSE NUMEROUS SHOWERS AND SCATTERED STRONG TO SEVERE
STORMS TO DEVELOP THIS EVENING.

THE MAIN SEVERE THREATS WILL BE THE DAMAGING WINDS AND LARGE
HAIL...ALTHOUGH ISOLATED TORNADOES COULD ALSO OCCUR. RESIDENTS OF
EAST TENNESSEE...SOUTHWESTERN VIRGINIA AND EXTREME SOUTHWESTERN
NORTH CAROLINA ARE URGED TO KEEP INFORMED ON THIS POTENTIALLY
DANGEROUS SITUATION.

PLEASE STAY TUNED TO NOAA WEATHER RADIO...THE INTERNET...OR
COMMERCIAL TELEVISION OR RADIO WHICH CARRY WEATHER INFORMATION...
FOR THE LATEST FORECASTS...AND POSSIBLE SEVERE WEATHER WATCHES AND
WARNINGS.

AFTER THE COLD FRONT PASSES TONIGHT...MUCH COLDER AIR WILL ENTER
THE REGION. TEMPERATURES MONDAY MORNING WILL PLUNGE TO THE MID TO
UPPER 30S IN MUCH OF EAST TENNESSEE AND TO FREEZING OR BELOW
FREEZING IN EXTREME SOUTHWEST NORTH CAROLINA AND PARTS OF THE
NORTHERN CUMBERLAND PLATEAU. ISOLATED LOCATIONS IN THE CENTRAL
VALLEY AND THE LOWER ELEVATIONS OF THE NORTHERN VALLEY WILL ALSO DIP
DOWN TO NEAR FREEZING. THE EASTERN MOUNTAINS OF TENNESSEE...AND
MOST OF SOUTHWEST VIRGINIA WILL SEE MINIMUM TEMPERATURES AT FREEZING
OR SLIGHTLY BELOW.

THIS COULD BE A REAL PROBLEM FOR SENSITIVE PLANTS AND CROPS. PLEASE
STAY TUNED FOR MORE INFORMATION AS IT BECOMES AVAILABLE.

$$

ww0091_overview_wou
SEL1

   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 91
   NWS STORM PREDICTION CENTER NORMAN OK
   220 PM CDT SAT MAR 28 2009

   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 

          NORTHERN ALABAMA
          EXTREME SOUTHEAST ILLINOIS
          PARTS OF WESTERN AND CENTRAL KENTUCKY
          MIDDLE TENNESSEE

   EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 220 PM UNTIL
   900 PM CDT.

   TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
   GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
   AREAS.

   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE
   MILES EAST AND WEST OF A LINE FROM 75 MILES NORTH OF FORT
   CAMPBELL KENTUCKY TO 30 MILES SOUTH SOUTHEAST OF HUNTSVILLE
   ALABAMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).

   REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
   TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
   AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
   THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
   AND POSSIBLE WARNINGS.

   OTHER WATCH INFORMATION...CONTINUE...WW 89...WW 90...

   DISCUSSION...SURFACE HEATING HAS RESULTED IN DESTABILIZATION IN
   ADVANCE OF A SURFACE COLD FRONT NOW MOVING EWD ACROSS WRN TN/MS...TO
   THE SE OF THE SYNOPTIC CYCLONE APPROACHING SE MO AND S OF A WARM
   FRONT LIFTING SLOWLY NWD TOWARD THE OH RIVER.  THUNDERSTORM
   DEVELOPMENT WILL BECOME MORE PROBABLE IN THE NEXT FEW HOURS AS
   MLCAPE INCREASES TO THE 500-1000 J/KG RANGE AND CONVECTIVE
   INHIBITION WEAKENS.  AT THE SAME TIME...STRONG DEEP LAYER VERTICAL
   WILL BE MAINTAINED OVER THE WARM SECTOR ON THE NOSE OF THE 80 KT MID
   LEVEL JET...AND LOW-LEVEL HODOGRAPH CURVATURE WILL BE FAVORABLE FOR
   RIGHT-MOVING SUPERCELLS.  THE COMBINATION OF MODEST INSTABILITY AND
   STRONG VERTICAL SHEAR APPEARS FAVORABLE FOR A BROKEN BAND OF
   SUPERCELLS CAPABLE OF PRODUCING A FEW TORNADOES...ALONG WITH LARGE
   HAIL AND DAMAGING WINDS.  THE SEVERE THREAT SHOULD INCREASE THROUGH
   THE AFTERNOON...AND THEN GRADUALLY DIMINISH AFTER SUNSET AS THE
   BOUNDARY LAYER STABILIZES.

   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   450. MEAN STORM MOTION VECTOR 24040.

   ...THOMPSON



SPC Considering Tornado Watch Soon

 
mcd0318  

MESOSCALE DISCUSSION 0318
   NWS STORM PREDICTION CENTER NORMAN OK
   1258 PM CDT SAT MAR 28 2009
  
   AREAS AFFECTED…PORTIONS OF THE LOWER OH AND TN RIVER VALLEYS
  
   CONCERNING…SEVERE POTENTIAL…TORNADO WATCH LIKELY
  
   VALID 281758Z – 281930Z
  
   SCATTERED TSTMS SHOULD DEVELOP BY 20-21Z ALONG A COLD FRONT
   PROGRESSING EWD ACROSS THE LOWER OH AND TN RIVER VALLEYS. VERY
   STRONG DEEP-LAYER SHEAR AMIDST MODEST SURFACE-BASED INSTABILITY WILL
   RESULT IN SUPERCELLS PRODUCING TORNADOES…LARGE HAIL…AND DAMAGING
   WINDS. A TORNADO WATCH WILL LIKELY BE ISSUED PRIOR TO 19-20Z.
  
   17Z SURFACE ANALYSIS PLACED A 993 MB LOW NEAR SGF WITH AN ARCING
   COLD FRONT FROM CGI TO TUP. BREAKS IN LOW-LEVEL STRATOCUMULUS AND
   PRESENCE OF MID-LEVEL DRY SLOT HAS ALLOWED SURFACE TEMPERATURES TO
   WARM TO AROUND 70 F ALONG AND AHEAD OF THE BOUNDARY…WHILE DEW
   POINTS HAVE RISEN TO AROUND 60 F GIVEN DOWNWARD MIXING/ADVECTION.
   WITH CONTINUED INSOLATION…MODIFIED RUC FORECAST SOUNDINGS SUGGEST
   MLCAPES OF 600 TO 1200 J/KG WILL BE COMMON.
  
   AS THE CYCLONE OVER THE OZARKS PIVOTS NEWD…LARGE-SCALE FORCED
   ASCENT WILL INCREASE AS AN INTENSE /90 KTS AT 500 MB/ S-SWLY
   MID-LEVEL JET OVERSPREADS THE REGION. TSTM INITIATION SHOULD OCCUR
   BY 21Z…WHICH IS SUPPORTED BY 00Z 4-KM WRF-NSSL AND 12Z GFS. WITH
   BACKED S/SELY LOW-LEVEL FLOW…DEEP-LAYER SHEAR WILL BE QUITE STRONG
   /AOA 60 KTS/ AND WILL PROMOTE SUPERCELL DEVELOPMENT. FAVORABLE
   LOW-LEVEL HODOGRAPHS WITH 0-1 KM SRH AOA 200 M2/S2 WILL SUPPORT
   POTENTIAL FOR TORNADOES. WHILE RELATIVELY STEEP MID-LAPSE RATES /AS
   SAMPLED UPSTREAM BY 12Z LZK RAOB/ AND THE VERY STRONG SHEAR WILL
   PROMOTE HAIL DEVELOPMENT AND LOCALLY DAMAGING WINDS.
  
   ..GRAMS.. 03/28/2009
  
  
   ATTN…WFO…MRX…LMK…OHX…BMX…HUN…PAH…MEG…
  
   LAT…LON   37768865 37418874 36708844 34868791 34188768 33918734
               33888682 33998633 34148605 34678581 35288564 36988595
               37948637 38238690 38188786 38108815 37768865

Day 1 Severe Weather Outlook

PLEASE SEE MOUNTAINCITYWEATHERCENTER.COM FOR ALL OF OUR THOUGHTS AND THE COMPLETE FORECAST PACKAGE.

day1otlk_1300 

SPC AC 281230
  
   DAY 1 CONVECTIVE OUTLOOK 
   NWS STORM PREDICTION CENTER NORMAN OK
   0730 AM CDT SAT MAR 28 2009
  
   VALID 281300Z – 291200Z
  
   …THERE IS A SLGT RISK OF SVR TSTMS ACROSS A LARGE PORTION OF THE
   OH/TN VLYS INTO THE SERN STATES…
  
   …SYNOPSIS…
   INTENSE UPPER LEVEL LOW WHICH HAS BEEN SLOW TO MOVE OVER OK UP TO
   NOW WILL BEGIN TO EVOLVE INTO AN OPEN-WAVE AND EJECT RAPIDLY NEWD
   THROUGH TONIGHT INTO THE OH VALLEY.  AS THIS OCCURS…SURFACE COLD
   FRONT WILL SURGE E-SEWD AND EXTEND ALONG THE CENTRAL APPALACHIANS
   INTO THE NERN GULF OF MEXICO BY THE END OF THE PERIOD.  LARGE AREA
   OF ENHANCED MID AND UPPER LEVEL SSWLY WINDS ASSOCIATED WITH THIS
   SYSTEM WILL MAINTAIN ENHANCED DEEP LAYER SHEAR ACROSS NEARLY ALL OF
   THE SERN 1/4 OF THE CONUS.
  
   EXTENSIVE DEEP MOIST CONVECTION HAS BEEN PERSISTENT ALONG THE
   CENTRAL AND NERN GULF COAST REGION OVER THE PAST 24 HRS…WHICH HAS
   INHIBITED GULF MOISTURE RETURN AWAY FROM THE IMMEDIATE COAST THROUGH
   THE EARLY MORNING HOURS.  HOWEVER…SSWLY LLJ IN EXCESS OF 60 KT
   EVIDENT ON MORNING VWP/S OVER THE NERN GULF COAST REGION WILL
   TRANSLATE ENEWD ACROSS MORE OF THE SOUTHEASTERN STATES TODAY.  THIS
   SHOULD ALLOW EFFECTIVE WARM FRONT TO LIFT NWD/BECOME BETTER DEFINED
   FROM PORTIONS OF THE CENTRAL CAROLINAS INTO SRN/CENTRAL GA.
   LOCATION OF THIS FRONT/INSTABILITY GRADIENT WILL BE PARAMOUNT IN
   PINNING DOWN CORRIDOR OF MOST INTENSE SEVERE THREAT TODAY.  IN
   ADDITION…INTENSE DEEP ASCENT AND STRONG HEIGHT FALLS ALOFT WILL
   ROTATE AROUND MAIN UPPER SYSTEM AND SUPPORT CONTINUED THREAT OF
   STRONG TO SEVERE THUNDERSTORMS AHEAD OF MAIN SURFACE COLD FRONT FROM
   THE MID SOUTH INTO THE TN/OH RIVER VALLEYS.  THIS THREAT MAY EVOLVE
   IN THE FORM OF SUBSEQUENT BANDS OF MOIST CONVECTION WITH EACH BAND
   RACING NNEWD THROUGH THE PERIOD.  IT REMAINS POSSIBLE THAT PORTIONS
   OF THE SRN APPALACHIANS MAY SEE A RELATIVE MINIMUM IN SEVERE
   THUNDERSTORMS AS COMPARED TO REGIONS TO THE NNW AND SSE.
  
   …CENTRAL/NERN GULF COAST INTO THE SOUTHEAST/MID ATLANTIC…
   AREAS OF STRONG TO SEVERE THUNDERSTORMS HAVE BEEN PERSISTENT FROM
   THE MOUTH OF THE MS RIVER ACROSS SRN AL/FL PANHANDLE DURING THE
   EARLY MORNING AHEAD OF MAIN COLD FRONT.  STRONG SLY LOW LEVEL FLOW
   AND AFOREMENTIONED SURFACE FRONT/INSTABILITY GRADIENT HAS LIFTED NWD
   PRECEEDING THIS ACTIVITY…ALLOWING INFLUX OF RICHER MOISTURE TO
   SPREAD INTO SWRN GA THROUGH 12Z.  THIS TREND SHOULD PERSIST TODAY
   AND ALLOW AREA OF MARGINAL TO MODERATE MLCAPE TO EVOLVE FROM THE FL
   PANHANDLE INTO SRN GA/ERN CAROLINAS THROUGH THE DAY.  EITHER
   THUNDERSTORMS WILL ORGANIZE/EVOLVE INTO A MORE COHERENT MCS AND LIFT
   ENEWD ACROSS THIS REGION TODAY…OR SERIAL SMALLER-SCALE
   SUPERCELLS/BOW ECHOES WILL CONTINUE TO EVOLVE OFF THE GULF AND/OR
   NEAR THE FRONT AND IMPACT THE REGION AS THEY RACE NEWD.  EITHER CASE
   SUGGESTS THIS ZONE COULD BE QUITE ACTIVE WITH A MYRIAD OF SEVERE
   THREATS…AT LEAST THROUGH THE EARLY EVENING.  NNEWD EXTENT OF
   SEVERE THREAT SHOULD BE TEMPERED AFTER DARK…HOWEVER AT LEAST
   ISOLATED SEVERE COULD ACCOMPANY STORMS INTO PORTIONS OF THE MID
   ATLANTIC DURING LATTER HALF OF PERIOD.
  
   …MID SOUTH INTO THE TN/OH VLYS…
   A SEPARATE AREA OF SVR POTENTIAL WILL LIKELY DEVELOP ACROSS PORTIONS
   OF THE TN/OH VLYS DURING THE AFTN/EVE…WITH ONGOING STRONG TO
   MARGINALLY SEVERE STORMS FROM NERN AR INTO SRN MO.  STRONGEST DCVA
   WILL TRANSLATE NEWD AWAY FROM THE RICH GULF MOISTURE SOURCE FARTHER
   SE.  BUT…LINGERING 50S SFC DEW POINTS ARCING BACK ALONG THE
   CDFNT/SFC LOW INTO THE LWR OH VLY BENEATH STEEP MID-TROPOSPHERIC
   LAPSE RATES WILL CONTRIBUTE TO MLCAPES OF A FEW HUNDRED J PER KG.
   MODELS CONTINUE TO SUPPORT SCATTERED TSTM DEVELOPMENT AHEAD OF THE
   COLD FRONT THROUGH THE DAY AMIDST STRONG VERTICAL SHEAR….INCLUDING
   A FEW LOW-TOPPED SUPERCELLS.  LARGE HAIL AND ISOLD DMGG WIND GUSTS
   WILL BE POSSIBLE.  TORNADOES CANNOT BE RULED OUT…ALTHOUGH FORECAST
   SOUNDINGS INDICATE MUCH OF THIS ACTIVITY COULD REMAIN ELEVATED.  SVR
   THREATS WILL DIMINISH WITH NE EXTENT AND AFTER SUNSET.
  
   ..EVANS/GARNER.. 03/28/2009

Saturday’s Severe Weather Outlook

day2otlk_0600

SPC AC 270555
  
   DAY 2 CONVECTIVE OUTLOOK 
   NWS STORM PREDICTION CENTER NORMAN OK
   1255 AM CDT FRI MAR 27 2009
  
   VALID 281200Z – 291200Z
  
   …THERE IS A SLGT RISK OF SVR TSTMS PORTIONS CENTRAL/SRN
   APPALACHIANS AND OH VALLEY REGION…MOST OF SERN CONUS….
  
   …SYNOPSIS…
   DOMINANT UPPER AIR FEATURE FOR THIS PERIOD WILL REMAIN STG MID-UPPER
   LEVEL LOW — NOW EVIDENT IN MOISTURE CHANNEL IMAGERY OVER 4-CORNERS
   REGION.  THIS CYCLONE IS FCST TO PIVOT SEWD/EWD ACROSS SRN PLAINS
   DAY-1…THEN LIFT NEWD FROM VICINITY SERN OK/RED RIVER VALLEY REGION
   EARLY IN PERIOD.  SHORTWAVE TROUGH — INITIALLY ANALYZED OVER BC
   NEAR LARGE SCALE MEAN RIDGE POSITION — WILL DIG SEWD ACROSS NRN
   PLAINS DAY-1…THEN PHASE/MERGE WITH EJECTING UPPER LOW OVER MS
   VALLEY DURING 29/00Z-29/06Z TIME FRAME.  BLENDED PERTURBATION THEN
   SHOULD CONTINUE EJECTING NEWD ACROSS KY/INDIANA/OH…BASED ON SREF
   CONSENSUS…ETA-KF AND OPERATIONAL SPECTRAL/NAM PROGS.  ATTACHED
   TROUGH WILL TRAIL SWD AND MOVE EWD ACROSS TN VALLEY AND GULF COASTAL
   PLAIN.
  
   RELATED SFC CYCLONE WILL OCCLUDE DAY-1…WITH TRIPLE-POINT/OCCLUSION
   LOW THEN DEVELOPING OVER ARKLATEX REGION AND LIFTING NEWD OVER
   MID-SOUTH EARLY THIS PERIOD.  PRIMARY SFC LOW THEN SHOULD MOVE NEWD
   TO VICINITY SERN ONT BY 29/12Z…WHILE ANOTHER OCCLUSION BEGINS TO
   OCCUR OVER CENTRAL APPALACHIANS.  COLD FRONT — MOVING EWD ACROSS MS
   AND SRN LA TO START DAY-2 — THEN SHOULD CROSS MOST OF SERN
   CONUS…REACHING FROM CENTRAL/W-CENTRAL VA SSWWD ACROSS NRN/WRN
   PORTIONS FL PENINSULA BY 29/12Z.  WARM FRONT IS EXPECTED TO LIFT NWD
   ACROSS PORTIONS GA/AL/SC EARLY IN PERIOD AHEAD OF COLD FRONT…THEN
   NWD ACROSS NC/VA/MD TIDEWATER REGION FROM LATE AFTERNOON/EARLY
   EVENING ONWARD.
  
   MEANWHILE…MID-UPPER SHORTWAVE TROUGH NOW OVER NRN PACIFIC — S OF
   ALEUTIAN ISLANDS — SHOULD DIG SEWD THROUGH RETROGRADING LONGWAVE
   RIDGE AND MOVE ASHORE PACIFIC NW AROUND 29/00Z…WITH POTENTIAL FOR
   ISOLATED/ACCOMPANYING THUNDER.  THIS FEATURE SHOULD AMPLIFY OVER
   INLAND NWRN STATES DURING ENSUING 12 HOURS.
  
   …SERN CONUS…
   SPATIALLY WIDESPREAD POTENTIAL FOR SVR WILL EXIST THIS
   PERIOD…INITIALLY CARRYING OVER FROM DAY-1 ALONG/AHEAD OF SFC COLD
   FRONT FROM MID-SOUTH TO MS/AL GULF COAST…THEN
   SHIFTING/REDEVELOPING EWD ACROSS SRN APPALACHIANS/PIEDMONT TO SRN
   ATLANTIC COAST STATES.
  
   WITHIN THIS BROAD REGION…CONDITIONAL DANGER EXISTS FOR
   CONCENTRATED OUTBREAK OF SEVERE — SPECIFICALLY TORNADOES AND
   DAMAGING WIND FROM NEAR MS/AL BORDER EWD TO PORTIONS CAROLINAS.
   THIS THREAT — CURRENTLY FOCUSED INSIDE 45-PERCENT PROBABILITY LINE
   — WILL DEPEND STRONGLY ON MESOSCALE PROCESSES RESULTING FROM DAY-1
   CONVECTIVE/BOUNDARY ACTIVITY AND RELATED IMPACT ON MOISTURE
   FIELD…AS DISCUSSED IN DAY-1 OUTLOOK.
  
   WIND FIELDS WILL BE QUITE STRONG OVER BROAD WARM SECTOR COVERING
   MUCH OF SERN CONUS…YIELDING DEEP-LAYER SHEAR AND — IN AREAS
   RELATIVELY UNDISTURBED BY MCS ACTIVITY — LOW LEVEL HODOGRAPHS
   FAVORABLE FOR SUPERCELLS AND BOW ECHOES.
  
   MIXED-MODE EVENT IS LIKELY.  QLCS SHOULD SUPPORT BOWS/LEWPS AND
   PERHAPS EMBEDDED SUPERCELLS NEAR FRONT.  POTENTIAL FOR CLUSTERED/MCS
   ACTIVITY OR DISCRETE STORMS EXISTS NEARLY ANYWHERE WITHIN WARM
   SECTOR AWAY FROM AREAS STABILIZED BY PRECIP AND PRIOR CONVECTION.
   ANY SUSTAINED SUPERCELLS WILL POSE THREAT OF TORNADOES GIVEN FCST
   RICH MOISTURE…LOW LCL…LARGE 0-1 KM AGL HODOGRAPHS…AND BROAD
   AREA OF AOA 50 KT EFFECTIVE SHEAR MAGNITUDE.  AREAS NOT AFFECTED BY
   CLOUD/PRECIP COVER DURING DIURNAL HEATING PERIOD MAY ATTAIN MLCAPE
   1000-2000 J/KG.  SFC-BASED EFFECTIVE INFLOW PARCELS SHOULD BE
   POSSIBLE OVER PORTIONS OF MID-SOUTH…AL/GA AND CAROLINAS E OF
   MOUNTAINS WITHIN 10-12 HOURS AHEAD OF COLD FROPA.  MAIN FACTOR
   PRECLUDING SMALLER CORRIDOR OF GREATER PROBABILITIES ATTM IS
   UNCERTAINTY OVER TIMING/LOCATION OF PRECIP-STABILIZED SWATHS AND
   RESULTING MESOSCALE BOUNDARY CHARACTERISTICS.
  
   INSTABILITY OF BOUNDARY LAYER AIR MASS ALSO IS FCST TO BECOME WEAKER
   AHEAD OF COLD FRONT FROM KY NWD ACROSS OH VALLEY REGION TO GREAT
   LAKES…WITH DISTANCE FROM OPTIMAL GULF RETURN-FLOW REGIME.
   THEREFORE PROBABILITIES ARE RAMPED DOWN GRADUALLY WITH NWD EXTENT.
   HOWEVER…POCKETS OF CLOUD BREAKS AND SUSTAINED DIURNAL HEATING
   WOULD BOOST MLCAPES AND ENCOURAGE MESOSCALE CONCENTRATIONS OF SVR
   POTENTIAL DURING 28/18Z-29/00Z TIME FRAME.

…SEVERE THUNDERSTORMS POSSIBLE SATURDAY WITH POTENTIAL FOR

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
449 AM EDT FRI MAR 27 2009

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-272100-
CHEROKEE-CLAY-SCOTT TN-CAMPBELL-CLAIBORNE-HANCOCK-HAWKINS-
SULLIVAN-JOHNSON-MORGAN-ANDERSON-UNION-GRAINGER-HAMBLEN-
NORTHWEST COCKE-COCKE SMOKY MOUNTAINS-NORTHWEST GREENE-
SOUTHEAST GREENE-WASHINGTON TN-UNICOI-NORTHWEST CARTER-
SOUTHEAST CARTER-ROANE-LOUDON-KNOX-JEFFERSON-NW BLOUNT-
BLOUNT SMOKY MOUNTAINS-NORTH SEVIER-SEVIER SMOKY MOUNTAINS-
SEQUATCHIE-BLEDSOE-RHEA-MEIGS-MCMINN-NORTHWEST MONROE-
SOUTHEAST MONROE-MARION-HAMILTON-BRADLEY-WEST POLK-EAST POLK-LEE-
WISE-SCOTT-RUSSELL-WASHINGTON-
INCLUDING THE CITIES OF…MURPHY…HAYESVILLE…ONEIDA…
LA FOLLETTE…TAZEWELL…SNEEDVILLE…ROGERSVILLE…KINGSPORT…
BRISTOL…MOUNTAIN CITY…WARTBURG…CLINTON…OAK RIDGE…
MAYNARDVILLE…RUTLEDGE…MORRISTOWN…NEWPORT…COSBY…
GREENEVILLE…CEDAR CREEK…JOHNSON CITY…ERWIN…ELIZABETHTON…
ROAN MOUNTAIN…KINGSTON…LENOIR CITY…KNOXVILLE…DANDRIDGE…
MARYVILLE…CADES COVE…SEVIERVILLE…GATLINBURG…DUNLAP…
PIKEVILLE…DAYTON…DECATUR…ATHENS…MADISONVILLE…
COKER CREEK…JASPER…CHATTANOOGA…CLEVELAND…BENTON…
DUCKTOWN…JONESVILLE…WISE…NORTON…GATE CITY…LEBANON…
ABINGDON
449 AM EDT FRI MAR 27 2009 /349 AM CDT FRI MAR 27 2009/

…SEVERE THUNDERSTORMS POSSIBLE SATURDAY WITH POTENTIAL FOR
FREEZING TEMPERATURES SUNDAY NIGHT…

A VERY POTENT FRONTAL SYSTEM OVER THE MIDWEST STATES WILL APPROACH
THE AREA SATURDAY. THIS STORM SYSTEM WILL PRODUCE WIDESPREAD
SHOWERS AND THUNDERSTORMS OVER THE REGION…AND HAS THE POTENTIAL
TO PRODUCE SEVERE THUNDERSTORMS INTO LATE SATURDAY NIGHT. THESE
STORMS COULD PRODUCE DAMAGING STRAIGHT LINE WINDS…VERY LARGE
HAIL…AND ISOLATED TORNADOES. AS THE SYSTEM IS STILL MANY HOURS
AWAY…PLEASE STAY TUNED TO NOAA WEATHER RADIO…THE INTERNET…OR
COMMERCIAL TELEVISION OR RADIO WHICH CARRY WEATHER INFORMATION TO
KEEP UP TO DATE ON THE SITUATION.

AFTER THE FRONT PASSES SATURDAY NIGHT…MUCH COLDER AIR WILL ENTER
THE REGION. TEMPERATURES SUNDAY NIGHT AND MONDAY MORNING WILL
PLUNGE TO THE MID TO UPPER 30S IN MUCH OF EAST TENNESSEE AND TO
FREEZING OR BELOW FREEZING IN EXTREME SOUTHWEST NORTH CAROLINA AND
PARTS OF THE NORTHERN CUMBERLAND PLATEAU. THE CENTRAL VALLEY AND
LOWER ELEVATIONS OF THE NORTHERN VALLEY WILL ALSO DIP DOWN TO NEAR
FREEZING…AND POSSIBLY BELOW FREEZING IN THE LOWER SPOTS. THE
EASTERN MOUNTAINS OF TENNESSEE…AND MOST OF NORTHEAST TENNESSEE
AND SOUTHWEST VIRGINIA WILL SEE MINIMUM TEMPERATURES AT FREEZING OR
SLIGHTLY BELOW.

THIS COULD BE A REAL PROBLEM FOR SENSITIVE PLANTS AND CROPS. PLEASE
STAY TUNED FOR MORE INFORMATION AS IT BECOMES AVAILABLE.

$$

TD

The Blizzard Part Of The Storm

03-08-blizzard1

A remarkable late season blizzard will pound portions of the central Rockies and the central Plains today through tomorrow.  My old stomping grounds of Breckenridge, CO will do quite well with this storm, totaling one to two feet by the time all is said and done.  Check www.brecklivecam.com for live shots of downtown “Breck!”

Denver will have an out and out blizzard this afternoon through early Friday, and you can view live streaming coverage on the 9news website here.  Or copy and paste this into your browser.  http://www.9news.com/livechat/

New Thoughts This Thursday Morning

 

**FOR OUR FULL FORECAST PACKAGE PLEASE SEE WWW.MOUNTAINCITYWEATHERCENTER.COM**

The threat of stormy weather Saturday is now shifting to more of an afternoon and evening threat and because of this, our chance of severe thunderstorms is increasing.  Of course this will allow for more daytime heating to take place and combine with an increasingly unstable air mass.  The period from early Saturday afternoon through the evening hours will be the time to watch for strong to severe thunderstorms here in the foothills and mountains.  It would not surprise me if portions of this risk area are upgraded to a moderate risk.

Concerning the rain tomorrow, the big mass of heavy rain should miss us to the east, but we’ll keep an eye on it.