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2016 Severe Weather Thread


downeastnc

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mcd0825.gif

 THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 237
   CONTINUES.

   SUMMARY...THE RISK FOR STORMS WITH POTENTIAL DAMAGING WIND GUSTS
   COULD STILL INCREASE ACROSS THE SOUTHEAST VIRGINA/NORTHEAST NORTH
   CAROLINA COASTAL PLAIN THROUGH 00-02Z.  IT IS ANTICIPATED THAT A NEW
   WATCH WILL NOT BE NEEDED AFTER THE CURRENTLY SCHEDULED 03Z
   EXPIRATION.

   DISCUSSION...AS A SIGNIFICANT SHORT WAVE TROUGH CONTINUES TO PIVOT
   NORTHEASTWARD THROUGH THE LOWER GREAT LAKES REGION...ASSOCIATED
   LARGE-SCALE FORCING FOR ASCENT IS BECOMING INCREASINGLY DISPLACED
   FROM THE SOUTHERN MID ATLANTIC COAST REGION.  IN LOWER-LEVELS...FLOW
   HAS BEEN MAINTAINING A SUBSTANTIAL WESTERLY COMPONENT ACROSS THE
   PIEDMONT INTO THE COASTAL PLAIN.  AND APPRECIABLE BOUNDARY LAYER
   INSTABILITY HAS BECOME INCREASINGLY CONFINED TO THE SOUTHEAST
   VIRGINIA/NORTHEAST NORTH CAROLINA COASTAL PLAIN...WHERE APPROACHING
   STORMS FROM THE WEST COULD STILL INTENSIFY SOME THROUGH 00-02Z.
   AIDED BY POTENTIAL HEAVY PRECIPITATION LOADING AND DOWNWARD TRANSFER
   OF MOMENTUM ASSOCIATED WITH 30-40 KT DEEP LAYER MEAN FLOW...STRONGER
   STORMS COULD BE ACCOMPANIED BY POTENTIALLY DAMAGING WIND GUSTS
   BEFORE WEAKENING/SPREADING OFFSHORE BY 02-03Z.
 

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Yeah not sure where this one went wrong, nothing got organized not enough forcing or something.....

Yeah I don't know man. Parameters looked pretty good, but maybe it was the weak mid level lapse rates. We had 3 pretty heavy showers here and only one clap of thunder all day, all while under an enhanced risk.

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Yeah not sure where this one went wrong, nothing got organized not enough forcing or something.....

 

 

Yeah I don't know man. Parameters looked pretty good, but maybe it was the weak mid level lapse rates. We had 3 pretty heavy showers here and only one clap of thunder all day, all while under an enhanced risk.

 

Must be the same thing that has been happening the past four years whenever we are under an enhanced risk.

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MESOSCALE PRECIPITATION DISCUSSION 0319

NWS WEATHER PREDICTION CENTER COLLEGE PARK MD

410 PM EDT MON JUN 06 2016

AREAS AFFECTED...NORTHERN GA & THE WESTERN CAROLINAS

CONCERNING...HEAVY RAINFALL...FLASH FLOODING POSSIBLE

VALID 062009Z - 070209Z

SUMMARY...PULSE THUNDERSTORMS ARE SHOWING SOME BACKBUILDING

CHARACTERISTICS WITHIN AN UNUSUAL ENVIRONMENT. WITH HOURLY RAIN

RATES UP TO 2.5" POSSIBLE, FLASH FLOODING IS POSSIBLE.

DISCUSSION...TROPICAL STORM COLIN APPEARS LIKE AN OCCLUDED CYCLONE

IN THE THERMAL FIELD AND WITHIN VISIBLE SATELLITE IMAGERY, WITH A

BAROCLINIC LEAF STRUCTURE ACROSS THE FL PANHANDLE, MUCH OF GA, AND

SC. ON THE NORTHWEST FRINGE OF THE DEEPER CLOUDS, PULSE

THUNDERSTORMS ARE FORMING FROM NORTHEAST AL ACROSS NORTHERN GA AND

THE WESTERN CAROLINAS, WHICH ARE SHOWING BACKBUILDING CHARACTER.

THIS APPEARS TO BE DUE TO THE INVERTED THERMAL FIELD ACROSS THE

DEW POINT BOUNDARY IN THE REGION, WITH WARMER AND MORE UNSTABLE

AIR IN ITS WAKE TO ITS WEST AND NORTHWEST, WHERE MLCAPES ARE

500-1000 J/KG. PRECIPITABLE WATER VALUES OF 1.5-2" LIE HERE, PER

RAP FORECAST MASS FIELDS. A SHORTWAVE MOVING ACROSS AL APPEARS TO

BE PROVIDING A BOOST TO UPWARD MOTION IN THE REGION.

RAP MASS FIELDS INDICATE THAT THE DEW POINT GRADIENT WILL RETREAT

NORTHWEST OVER NEXT SEVERAL HOURS IN THE DIRECTION OF THE

INSTABILITY. THIS BOUNDARY SHOULD CONTINUE TO EXHIBIT

BACKBUILDING CELLS AS IT SLOWLY SHIFTS NORTHWEST, WHICH COULD

OCCASIONALLY SHOW SOME ORGANIZATION AS BULK SHEAR VALUES IN THE

0-6 KM LAYER ARE 30-40 KTS. THE 12Z SSEO NEIGHBORHOOD

PROBABILITIES IMPLY ISSUES WOULD REACH A MAXIMUM IN THE 22-01Z

WINDOW. GALVEZ-DAVISON INDEX VALUES MAXIMIZE AROUND 21Z.

CONSIDERING THE ABOVE, CELL COVERAGE SHOULD INCREASE OVER THE NEXT

FEW HOURS. THE MESOSCALE/CAM GUIDANCE WHICH SHOWS A SIGNAL FOR IT

SHOWS LOCAL AMOUNTS IN THE 3-5" RANGE, WHICH COULD FALL QUICKLY.

SHOULD THE CELLS SHOW SOME LONGEVITY OR START TO MERGE, HOURLY

RAIN RATES UP TO 2.5" WOULD BE POSSIBLE. OTHERWISE, 1.5" AN HOUR

RAIN RATES WOULD BE PAR FOR THE COURSE. AFTER SUNSET, THIS

CONVECTION SHOULD WANE AS INSTABILITY BEGINS TO FALTER. DUE TO

THE UNCERTAINTY, KEPT THE MPD CATEGORY AS POSSIBLE FLASH FLOODING.

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THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NORTH CAROLINA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SCATTERED STRONG STORMS ARE EXPECTED LATE THIS AFTERNOON THROUGH

MID EVENING OVER NORTHEAST PORTIONS OF NORTH CAROLINA... AHEAD OF

A COLD FRONT MOVING IN FROM THE NORTH. A FEW STORMS MAY BECOME

SEVERE... WITH DAMAGING WIND GUSTS OVER 60 MPH POSSIBLE. THE

GREATEST RISK OF STRONG TO SEVERE STORMS WILL BE NORTH AND EAST OF

A LINE FROM ROXBORO THROUGH THE TRIANGLE REGION TO GOLDSBORO...

BETWEEN THE HOURS OF 4 PM AND 8 PM.

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mcd0932.gif

 

MESOSCALE DISCUSSION 0932
NWS STORM PREDICTION CENTER NORMAN OK
1240 PM CDT WED JUN 15 2016

AREAS AFFECTED...MUCH OF THE CAROLINAS

CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY

VALID 151740Z - 151915Z

PROBABILITY OF WATCH ISSUANCE...20 PERCENT

SUMMARY...A THREAT FOR STRONG TO LOCALLY DMGG WIND GUSTS WILL
DEVELOP THIS AFTERNOON ACROSS MUCH OF THE CAROLINAS. A WATCH IS NOT
CURRENTLY ANTICIPATED.

DISCUSSION...RADAR AND VISIBLE SATELLITE TRENDS SHOW A WIDESPREAD
INCREASE IN DEEPENING CU FROM THE SRN APPALACHIANS ACROSS THE
CAROLINA COASTAL PLAIN. THIS IS OCCURRING WITHIN AN ANOMALOUSLY
MOIST AIR MASS ACROSS THE REGION...WITH 12Z OBSERVED SOUNDINGS
SHOWING PW VALUES 1.7-2.1 INCHES. CONVECTION DEVELOPING OVER THE SRN
APPALACHIANS MAY BE FURTHER ENCOURAGED BY A WEAK MCV MOVING EWD OUT
OF SERN TN AND NRN GA. ADDITIONAL STRONG TSTMS HAVE DEVELOPED NEAR
THE COAST ALONG A SEA BREEZE BOUNDARY...BUT SHOULD GENERALLY MOVE
OFFSHORE WITHIN THE NEXT HR OR SO.

CONVECTIVE COVERAGE SHOULD CONTINUE TO INCREASE THROUGH THE
MID-AFTERNOON...WITH THE EVOLUTION OF A FEW WEAKLY ORGANIZED
MULTICELL CLUSTERS POSSIBLE GIVEN 15-20 KT OF EFFECTIVE SHEAR. RICH
TROPOSPHERIC MOISTURE AND SOME STEEPENING OF LOW-LEVEL LAPSE RATES
WILL BE FAVORABLE FOR ISOLATED WET DOWNBURST WIND GUSTS...SOME OF
WHICH COULD APPROACH SVR LIMITS. HOWEVER...GIVEN THE GENERALLY POOR
MIDLEVEL LAPSE RATES AND MARGINAL DEEP-LAYER SHEAR...A WATCH IS NOT
ANTICIPATED ATTM.

..ROGERS/GUYER.. 06/15/2016

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918 PM EDT WED JUN 15 2016

THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A

* TORNADO WARNING FOR...

NORTH CENTRAL FRANKLIN COUNTY IN CENTRAL NORTH CAROLINA...

* UNTIL 945 PM EDT

* AT 918 PM EDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A

TORNADO WAS LOCATED OVER LOUISBURG...MOVING NORTHEAST AT 25 MPH.

HAZARD...TORNADO.

SOURCE...RADAR INDICATED ROTATION.

IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT

SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED.

DAMAGE TO ROOFS...WINDOWS...AND VEHICLES WILL OCCUR. TREE

DAMAGE IS LIKELY.

* LOCATIONS IMPACTED INCLUDE...

LOUISBURG AND INGLESIDE.

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I was in Petco last night when the storm rolled through. It was a great storm. Lots of thunder and lightning, wind, and pouring rain. Once again I experience a big storm when there is no watch at all, but when we do have a watch there's no storms to speak of around here. Funny how that seems to be the norm the past few years.

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