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2014 Severe Storm season


downeastnc

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Severe weather season in the SE is OVER. Or at least tornado season is. It's extremely rare to have tornadoes in the summer months in the south, unless it's the product of a tropical system.

Yes however I cannot recall if it was Accuweather or the Weather Channel that covered a great approximate three minute discussion on this but due to several contributing factors they stated that severe weather season would become rampant this year from the June-July timeframe rather than the traditional April-May timeframe. Be mindful of this maybe not so much for your neck of the woods but just watching the MCS and derecho talks starting to heat up for today and tomorrow it may be coming to fruition. Just some food for thought.

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GSP has a good write up in their AFD . They say if the MCS misses to our north on Wednesday night, that the NAM shows cape of 4000+ in our forecast area ahead of the front on Thur. ! That's unusually high for our area and could lead to a very severe outbreak of damaging storms and they mention isolated tornado threat!

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.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.SCATTERED TO NUMEROUS THUNDERSTORMS...SOME PROBABLY SEVERE WITHDAMAGING WIND GUSTS AND HAIL...ARE EXPECTED TO ACCOMPANY A COLDFRONT THROUGH CENTRAL NC ON THURSDAY.

 

Looks like the system that is in the midwest today could affect us. WRAL said we will have a moderate risk Thursday for severe storms.

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Looks like the system that is in the midwest today could affect us. WRAL said we will have a moderate risk Thursday for severe storms.

Moderate risk? I think you mean slight chance.
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GSP has a good write up in their AFD . They say if the MCS misses to our north on Wednesday night, that the NAM shows cape of 4000+ in our forecast area ahead of the front on Thur. ! That's unusually high for our area and could lead to a very severe outbreak of damaging storms and they mention isolated tornado threat!

 

I just read that write up.  You don't see them talking something up and using that wording very often.  Here is the c&p for everyone to read.

 

THE THURSDAY FORECAST DEPENDS MUCH UPON WHAT HAPPENS WED NIGHT/THU

MORNING...AS CONVECTION WILL BE ONGOING SOMEWHERE WITHIN THE

MID-ATLANTIC AND SURROUNDINGS AREAS. IF THE ATMOSPHERE OVER THE

WESTERN CAROLINAS REMAINS RELATIVELY UNDISTURBED BY THIS AM

CONVECTION...WE FACE A POTENTIALLY VOLATILE SITUATION THU

AFTERNOON...AS THE COLD FRONT SAGS INTO THE AREA. FORECAST SOUNDINGS

ARE QUITE OUTLANDISH FOR OUR AREA...WITH CAPE IN SOME NAM SOUNDINGS

EXCEEDING 4000 J/KG. ALTHOUGH PROFILES ARE GENERALLY UNIDIRECTIONAL/

VEERED...SHEAR IS MORE THAN RESPECTABLE...ESPECIALLY FOR EARLY

JUNE...WITH DEEP LAYER BULK SHEAR EXCEEDING 35 KTS...AND LOW LEVEL

SHEAR IN EXCESS OF 25 KTS. GIVEN FORECAST DCAPE IN EXCESS OF

1000...INTENSE CONVECTION COULD ORGANIZE ALONG STRONG COLD

POOLS...RESULTING IN A POSSIBLE HIGH END DOWNBURST THREAT...WHILE

CAPE IN EXCESS OF 1000 J/KG IN THE -10C TO -30C LAYER WOULD ALSO

SUPPORT THE POTENTIAL FOR VERY LARGE HAIL. FAIRLY LONG/STRAIGHT

HODOGRAPHS WITHIN HIGH/EXTREME CAPE ENVIRONMENT WOULD ALSO SUPPORT A

GOOD POTENTIAL FOR DISCRETE/SPLITTING SUPERCELLS...WITH AN ISOLATED

TORNADO THREAT POSSIBLE WITH ANY CELL DEVIATING STRONGLY FROM THE

MEAN FLOW. AGAIN...ALL POSSIBLE ONLY IF MORNING CONVECTION DOESN/T

STABILIZE THE ENVIRONMENT.

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HWO for RAH this morning..

 

612 AM EDT WED JUN 4 2014THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NORTH CAROLINA..DAY ONE...TODAY AND TONIGHT.THERE IS A CHANCE OF THUNDERSTORMS...SOME POSSIBLY SEVERE WITH DAMAGINGWIND GUSTS AND HAIL...MAINLY BETWEEN 1 PM AND 6 PM.THERE IS ALSO A CHANCE FOR A LINE OF THUNDERSTORMS WITH STRONG TOLOCALLY SEVERE WIND GUSTS TO CROSS THE AREA OVERNIGHT...BETWEEN10 PM AND 3 AM. SOME WIND GUSTS MAY OCCUR WELL AHEAD...OR IN THEABSENCE...OF RAIN AND THUNDER..DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.ISOLATED SEVERE THUNDERSTORMS WILL BE POSSIBLE THURSDAY AFTERNOONAND EVENING...WITH A PRIMARY THREAT OF DAMAGING WIND GUSTS.
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Does not look like a good severe setup to me.  Hopefully, we can get some legitimate thunder at least.

 

Really depends on timing and how much of the MCS that fires NW of here today gets in here and leave trash around to kill instability.....SPC dropped all slight risk for the SE so they must think we don't get a lot of sun tomorrow to juice it up.

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341 PM EDT Wed Jun 4 2014

The National Weather Service in Raleigh has issued a

* Severe Thunderstorm Warning for...
  southwestern Granville County in central North Carolina...
  central Wake County in central North Carolina...
  southwestern Franklin County in central North Carolina...
  southern Durham County in central North Carolina...

* until 430 PM EDT

* at 341 PM EDT...Doppler radar indicated a severe thunderstorm
  capable of producing damaging winds in excess of 58 mph. This storm
  was located near Durham...and moving southeast at 25 mph.

* Locations impacted include...
  Raleigh...Durham...Cary...Creedmoor...Wake Forest...Garner...
  Butner...rdu international...Morrisville...Knightdale...
  Rolesville...Youngsville...Bethesda...Parkwood...and Falls Lake.
 

 

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Tornado Watch for WNC:

 

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF
WESTERN NORTH CAROLINA
EASTERN TENNESSEE
WEST CENTRAL AND SOUTHWEST VIRGINIA
SOUTHERN WEST VIRGINIA

* EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 800 PM
UNTIL 300 AM EDT.

* PRIMARY THREATS INCLUDE...
A COUPLE TORNADOES POSSIBLE
SCATTERED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE
ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE
MILES EAST AND WEST OF A LINE FROM 30 MILES NORTHEAST OF WHITE
SULPHUR SPRINGS WEST VIRGINIA TO 25 MILES SOUTHWEST OF HOT
SPRINGS NORTH CAROLINA. FOR A COMPLETE DEPICTION OF THE WATCH
SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 218...WW 219...WW
220
...WW 221...

DISCUSSION...CLUSTERS OF SEMI-DISCRETE STORMS/SUPERCELLS EXPECTED TO
PERSIST ALONG THE W SLOPES OF THE SRN APPALACHIANS THROUGH LATE
EVE...WITH ADDITIONAL STORMS POSSIBLY MOVING/DEVELOPING EWD INTO WRN
AND SW VA AS MID-LVL SPEED MAX AND ASSOCIATED UVV FIELD OVERSPREAD
MOIST/CONFLUENT LOW--LVL FLOW.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 30030.

 

ww0222_overview_big_wou.gif

 

ww0222_radar_big.gif

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Well not much in the way of cloud cover perhaps a return to a slight risk is in order for central and eastern NC......its muggy and lots of midday sun should put us in the highest cape values we have seen so far and with decent lapse rates even the not so great shear should be enough to see some action especially 12-5ish as those storms will have the most to work with.

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LI -4 already and cape is already building and the mid level lapse rates are high for here this time of the year so if we can keep a lot of crud from firing late morning and trashing it up we might see some pretty decent storms especially Fayetteville and up and east of I-95.

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Cells firing around Raleigh and the instability is pretty high so we should see these spread the best chance to get any real severe stuff will be the next 3-4 hrs during peak heating when a storm has the most to work with and even then its going to be pulse type storms I bet with the shear so weak.

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