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Dec. 22nd Severe Thread


andyhb

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New Watch for much of North and Central Georgia. Certainly have some strong storms about to enter my Alabama Counties... Let the games begin... Sure feels like severe weather out there.

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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 900

NWS STORM PREDICTION CENTER NORMAN OK

325 PM EST THU DEC 22 2011

THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF

NORTHERN AND CENTRAL GEORGIA

FAR WESTERN NORTH CAROLINA

FAR NORTHWEST SOUTH CAROLINA

FAR SOUTHEAST TENNESSEE

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 325 PM UNTIL

1100 PM EST.

TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 80 STATUTE

MILES EITHER SIDE OF A LINE FROM MACON GEORGIA TO 75 MILES

NORTHEAST OF ROME GEORGIA. FOR A COMPLETE DEPICTION OF THE WATCH

SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).

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 899...

DISCUSSION...QLCS WITH EMBEDDED SUPERCELLS AND BOWING STRUCTURES

ONGOING OVER CNTRL AL IS EXPECTED TO MOVE/DEVELOP NEWD ACROSS THE

WATCH AREA THIS AFTERNOON AND EVENING IN ADVANCE OF MIDLEVEL TROUGH

TRANSLATING ACROSS THE TN VALLEY. LATEST SURFACE ANALYSIS INDICATES

A CONCENTRATED ZONE OF PRESSURE FALLS ACROSS THE SRN APPALACHIANS

WHICH WILL ENHANCE LOW-LEVEL MOISTURE FLUX AND AID IN LOW-LEVEL

CONVERGENCE AND UPLIFT ALONG THE HIGHER TERRAIN. WIDESPREAD CLOUDS

WILL CONTINUE TO LIMIT THE DEGREE OF INSTABILITY WITH MLCAPE OF LESS

THAN 500 J/KG. HOWEVER...GIVEN THE STRENGTHENING FORCING FOR ASCENT

AND STRONG LOW- AND DEEP-LAYER SHEAR...A CONTINUED RISK FOR A COUPLE

TORNADOES AND DAMAGING WINDS WILL EXIST WITH TSTMS AS THEY MOVE

ACROSS THE REGION.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

400. MEAN STORM MOTION VECTOR 22040.

...MEAD

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...A TORNADO WARNING REMAINS IN EFFECT FOR WEST CENTRAL TALLAPOOSA...

NORTHERN ELMORE AND SOUTHEASTERN COOSA COUNTIES UNTIL 245 PM CST...

AT 217 PM CST...EMERGENCY MANAGEMENT REPORTED DAMAGE WITH THIS STORM

IN NORTHEASTERN AUTAUGA COUNTY NEAR MARBURY. THIS TORNADO WAS

LOCATED NEAR WEOKA MILLS...OR 12 MILES NORTHWEST OF

WETUMPKA...MOVING NORTHEAST AT 55 MPH.

LOCATIONS IMPACTED INCLUDE...

EQUALITY...ALEXANDER CITY...DADEVILLE...SPEED...PENTONVILLE...

NIXBURG...COTTAGE GROVE...HIGHWAY 9 AND HIGHWAY 22...MARTIN LAKE AT

KOWALIGA AND WIND CREEK STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR

THE TORNADO. TAKE COVER NOW.

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160 kts G2G.

SEVERE WEATHER STATEMENT

NATIONAL WEATHER SERVICE BIRMINGHAM AL

232 PM CST THU DEC 22 2011

ALC037-051-123-222045-

/O.CON.KBMX.TO.W.0174.000000T0000Z-111222T2045Z/

COOSA AL-ELMORE AL-TALLAPOOSA AL-

232 PM CST THU DEC 22 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR WEST CENTRAL TALLAPOOSA...

NORTHEASTERN ELMORE AND SOUTHEASTERN COOSA COUNTIES UNTIL 245 PM

CST...

AT 229 PM CST...NWS METEOROLOGISTS INDICATED THERE WAS VERY STRONG

ROTATION IN A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.

THIS DANGEROUS STORM WAS LOCATED NEAR EQUALITY...MOVING NORTHEAST AT

55 MPH.

LOCATIONS IMPACTED INCLUDE...

ALEXANDER CITY...DADEVILLE...HIGHWAY 9 AND HIGHWAY 22...MARTIN LAKE

AT KOWALIGA...WIND CREEK STATE PARK...JACKSONS' GAP...JACKSONS

GAP...HILLABEE CREEK...RAY AND FISHPOND.

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GSP afternoon afd for severe.

.NEAR TERM /THROUGH FRIDAY/...

AT 230 PM...LATEST SFC ANALYSIS INDICATED THAT A STATIONARY FRONT WAS

LOCATED ACROSS THE EAST FACING MTN SLOPES/FOOTHILLS OF THE

CAROLINAS...EXTENDING SW TO A SFC LOW OVER THE MS/AL STATE LINE.

RECENT W/V IMAGE SHOWS A DEEP TROF PASSING OVER THE SOUTHERN

MISSISSIPPI RIVER VALLEY...WITH DEEP MOISTURE TRANSPORT OCCURRING EAST

ACROSS THE DEEP SOUTH TO THE SOUTHERN APPALACHIAN REGION. PWS

GENERALLY RUNNING GREATER THAN 1.25 INCHES...OR AROUND 200 PERCENT

OF NORMAL. MODELS INDICATE THAT THE LOW WILL TRACK NE ALONG THE

STALLED THE FRONT...WITH THE LOW CENTER EXPECTED TO FAVOR TN SIDE OF

THE MTNS. THE CWA WILL REMAIN IN THE WARM SECTOR THROUGH THE EARLY

EVENING HOURS...WITH TEMPS AND DWPTS EXPECTED TO RANGE IN THE L60S

TO U50S.

AS THE LOW APPROACHES...LLVL WIND FIELDS WILL STRENGTHEN...WITH THE

H85 WINDS EXPECTED TO PEAK AROUND 50S KTS ACROSS THE CWA AROUND 0Z

FRI. FORECAST SOUNDINGS INDICATE THAT 0-1 KM HELICITY WILL INCREASE

TO 250 TO 275 M2/S2 ACROSS THE MTN AND FOOTHILL AREAS BETWEEN 21Z TO

0Z...WITH HIGH VALUES CONTINUING THOUGH FROPA AROUND MIDNIGHT. WARM

AND MOIST LLVL CONDITIONS ALONG WITH FALLING MID LEVEL HEIGHTS MAY

SUPPORT A BROAD BAND OF 100 TO 600 J/KG OF CAPE ACROSS THE MTNS AND

FOOTHILLS BETWEEN 21Z TO 3Z. IN ADDITION...QG FORCING WILL LIKELY

PEAK ACROSS THE REGION AROUND 0Z. BASED ON THE TIMING OF THE FORCING

AND SFC BASED FEATURES I EXPECT TWO ROUNDS OF SHRA. THE FIRST ROUND

IS OCCURRING NOW WITH A WEST TO EAST BAND OF SHRA LIFTING NORTH

ACROSS THE REGION. THIS BAND IS LIKELY RESPONDING TO AN INCREASE OF

UPPER FORCING AND DEVELOPING LLVL INSTABILITY. THE SECOND ROUND WILL

BE ASSOCIATED WITH THE BROAD AREA OF RA AND TSRA ASSOCIATED WITH THE

SFC LOW AND COLD FRONT. THE COVERAGE ASSOCIATED WITH THE SECOND

ROUND SHOULD ARRIVE OVER THE MTNS AND UPPER SAVANNAH RIVER VALLEY

LATE THIS AFTERNOON...SWEEPING EAST WITH THE COLD FRONT MAINLY

DURING THE MID EVENING HOURS...ENDING DURING THE EARLY MORNING

HOURS. I WILL INCREASE POPS TO AROUND 100 PERCENT...WITH QPF RANGING

FROM 1.5 OVER THE WESTERN MTNS TO HALF INCH EAST OF I-77.

THE SEVERE POTENTIAL WILL INCREASE LATE THIS AFTERNOON ACROSS THE

WESTERN NC MTNS TO THE UPPER SAVANNAH RIVER VALLEY AS CAPES DEVELOP

AND LLVL SHEAR INCREASES. THE SEVERE THREAT WILL SHIFT EAST AS THE

COLD FRONT MOVES ACROSS THE MTNS DURING THE MID EVENING HOURS. CAPE

SHOULD BECOME VERY LIMITED AS THE FRONT APPROACH THE I-77 CORRIDOR.

IT APPEARS THAT THE MOST LIKELY AREAS FOR SEVERE WEATHER WILL OCCUR

ACROSS NE GA...THE UPSTATE OF SC...AND THE WESTERN NC MTNS DURING

THE LATE AFTERNOON TO MID EVENING. THREATS WILL OCCUR WITH LINEAR

CONVECTION...POSSIBLY PRODUCING SEVERE WIND GUSTS OR A BRIEF WEAK

TORNADO. IN ADDITION...SATURATED SOIL...ELEVATED WATER LEVELS ON

STREAM AND CREEKS...MAY YIELD A FASTER RESPONSE TO THE RAINFALL

THROUGH THIS EVENING. IT IS POSSIBLE A COUPLE OF SPOTS ACROSS THE

SOUTHERN APPALACHIANS COULD SEE STREAMS AND CREEKS APPROACH OR

EXCEED BANKFULL.

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A strong storm passed over here around 4:20. Wunderground Radar showed a Mesocyclone (C0) that briefly displayed a Tornado vortex sig. just as it moved to my NE.

I noticed just as the storm was approaching that winds were from the ESE while the clouds were moving from the SW with some moving from the N within the dark cloud band( it looked like a squall line). Just before coming indoors, there were some what looked to be mamatus showing up within the middle portion of this dark line just to my west. Also, the hills just to my west were whited out from what appeared to be hail.

I recorded just a little pea sized hail and very little rain with this. A peak gust of 42 mph was recorded as that line came through. According to Radar, the rotating cell went just to my north moving in a NE direction.

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FFC still no L2 feed, using BMX, cell ssw of FFC is likely severe, moto posted a new dual pole hydro clas earlier, based on MHX's integration, within about 80-90 miles helpful, after that just clutter.

post-382-0-10668000-1324593164.jpg

Radarscope on iOS has dual pole graphics, L3 data feed, GRLX L2 has not updated, and wants several hundred more, kind of ticked and OT.

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The Toomer's corner cam was AWESOME to have during the 5 when Auburn got slammed! Thankfully, this is more of a wind threat for us the rest of the way. There were some decent couplets earlier this afternoon but as soon as that second line of showers caught up to the first one, it squelched the tornadic threat. Let the rain and winds come! :maprain:

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