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4/09/13-4/11/13 first major outbreak of 2013?
04-11-2013, 06:51 AM
Post: #21
4/09/13-4/11/13 first major outbreak of 2013?
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE LITTLE ROCK AR
1005 PM CDT WED APR 10 2013


Quote:.TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON

.DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.

..REMARKS..

0320 PM HAIL ATKINS 35.24N 92.95W
04/10/2013 E0.75 INCH POPE AR TRAINED SPOTTER

THE REPORT TIME IS BASED OFF RADAR...AND WAS RELAYED BY
BROADCAST MEDIA.

0359 PM TSTM WND DMG WONDERVIEW 35.32N 92.73W
04/10/2013 CONWAY AR AMATEUR RADIO

A ROOF WAS BLOWN OFF A BARN. A FUNNEL CLOUD WAS
SIGHTED...SO THIS MAY BE A BRIEF TORNADO TOUCHDOWN.

0415 PM TSTM WND DMG WELSH 34.35N 93.47W
04/10/2013 MONTGOMERY AR SOCIAL MEDIA

CHICKEN HOUSES WERE DAMAGED. TREES AND POWER LINES WERE
BLOWN DOWN.

0415 PM TSTM WND DMG ATKINS 35.24N 92.95W
04/10/2013 POPE AR SOCIAL MEDIA

TREES WERE BLOWN DOWN.

0421 PM TORNADO SCOTLAND 35.52N 92.62W
04/10/2013 VAN BUREN AR LAW ENFORCEMENT

LAW ENFORCEMENT HAS REPORTED A TORNADO ON THE GROUND IN
SCOTTLAND.

0424 PM TORNADO 7 SW CLINTON 35.51N 92.54W
04/10/2013 VAN BUREN AR SOCIAL MEDIA

TREES WERE BLOWN DOWN...AND HOUSES WERE DAMAGED ON
SCOTLAND-FORMOSA ROAD.

0430 PM TORNADO 4 SW CLINTON 35.54N 92.50W
04/10/2013 VAN BUREN AR SOCIAL MEDIA

HIGHWAY 95 WAS BLOCKED BY FALLEN TREES.

0445 PM TORNADO BOTKINBURG 35.70N 92.52W
04/10/2013 VAN BUREN AR LAW ENFORCEMENT

A HOUSE WAS DESTROYED...AND 18 WHEELER FLIPPED OVER.

0527 PM TSTM WND DMG 5 W MOUNTAIN VIEW 35.87N 92.20W
04/10/2013 STONE AR LAW ENFORCEMENT

MANY TREES WERE BLOWN DOWN ALONG HIGHWAY 66...AND
SHINGLES WERE BLOWN OFF OF A ROOF.

0527 PM TSTM WND DMG THORNBURG 34.93N 92.80W
04/10/2013 PERRY AR TRAINED SPOTTER

THREES WERE BLOWN DOWN ON HIGHWAY 10...BLOCKING THE ROAD.

0530 PM TSTM WND DMG PERRYVILLE 35.01N 92.80W
04/10/2013 PERRY AR TRAINED SPOTTER

TREES WERE BLOWN DOWN.

0535 PM TSTM WND GST COLLEGEVILLE 34.64N 92.48W
04/10/2013 E60.00 MPH SALINE AR AMATEUR RADIO

0540 PM FUNNEL CLOUD 1 NW ALLISON 35.94N 92.13W
04/10/2013 STONE AR TRAINED SPOTTER

0540 PM TSTM WND DMG MOUNT OLIVE 36.00N 92.08W
04/10/2013 IZARD AR LAW ENFORCEMENT

A HOUSE WAS DESTROYED.

0558 PM TSTM WND DMG HAMLET 35.08N 92.32W
04/10/2013 FAULKNER AR AMATEUR RADIO

TREES WERE BLOWN DOWN ON A STORE. WINDS WERE ESTIMATED
60-65 MPH.

0603 PM TSTM WND GST MORGAN 34.88N 92.37W
04/10/2013 E60.00 MPH PULASKI AR AMATEUR RADIO

0609 PM TSTM WND GST 7 S VILONIA 34.98N 92.21W
04/10/2013 E70.00 MPH PULASKI AR AMATEUR RADIO

0640 PM FLASH FLOOD 3 SW MOUNTAIN VIEW 35.84N 92.15W
04/10/2013 STONE AR LAW ENFORCEMENT

DITCHES HAVE BECOME FULL AND ARE NOW OVERFLOWING ONTO
ROADWAYS MAKING ROAD IMPASSABLE. LOW WATER BRIDGES HAVE
BECOME INUNDATED. WIDESPREAD STREET FLOODING ONGOING.

0640 PM TSTM WND DMG VIOLA 36.40N 91.98W
04/10/2013 FULTON AR LAW ENFORCEMENT

TREES WERE BLOWN DOWN.

0651 PM TSTM WND DMG 2 S HORSESHOE BEND 36.19N 91.74W
04/10/2013 IZARD AR TRAINED SPOTTER

MULTIPLE HOUSES SUSTAINED SIDING AND ROOF DAMAGE. ONE
BUILDING IS PARTIALLY COLLAPSED. MANY TREES ARE
DOWN...WITH MANY BLOCKING ROADS.

0705 PM TSTM WND DMG EVENING SHADE 36.07N 91.62W
04/10/2013 SHARP AR TRAINED SPOTTER

MULTIPLE TREES ARE DOWN IN AND AROUND EVENING SHADE.
SEVERAL ROADS ARE CURRENTLY BLOCKED.

0711 PM LIGHTNING PANGBURN 35.43N 91.84W
04/10/2013 WHITE AR LAW ENFORCEMENT

A LIGHTNING STRIKE CAUSED A HOUSE FIRE ON RANCH ROAD.

0712 PM LIGHTNING 4 NW SEARCY 35.28N 91.78W
04/10/2013 WHITE AR LAW ENFORCEMENT

A LIGHTNING STRIKE CAUSED A HOUSE FIRE ON FOSTER CHAPEL
ROAD.

0800 PM TSTM WND DMG SULPHUR SPRINGS 34.18N 92.13W
04/10/2013 JEFFERSON AR TRAINED SPOTTER

A TREE WAS BLOWN DOWN ON A MOBILE HOME.

0833 PM TSTM WND DMG GARRETT BRIDGE 33.87N 91.65W
04/10/2013 LINCOLN AR LAW ENFORCEMENT

TWO HOUSES WERE DESTROYED...AND SEVERAL WERE DAMAGED.

0930 PM TSTM WND GST KELSO 33.80N 91.27W
04/10/2013 E60.00 MPH DESHA AR LAW ENFORCEMENT

0956 PM TSTM WND GST MCGEHEE 33.63N 91.39W
04/10/2013 E60.00 MPH DESHA AR LAW ENFORCEMENT

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04-11-2013, 06:51 AM
Post: #22
4/09/13-4/11/13 first major outbreak of 2013?
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE SHREVEPORT LA
1114 PM CDT WED APR 10 2013


Quote:.TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON

.DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.

..REMARKS..

0210 PM TSTM WND DMG TEXARKANA 33.45N 94.02W
04/10/2013 MILLER AR BROADCAST MEDIA

VEHICLE WINDOWS BLOWN OUT IN PARKING LOT OF HIGH
SCHOOL...TREES DOWN

0325 PM TSTM WND DMG 4 SW AVINGER 32.86N 94.60W
04/10/2013 MARION TX LAW ENFORCEMENT

TREES DOWN...POWER LINES DOWN

0405 PM HAIL ATLANTA 33.12N 94.16W
04/10/2013 E0.50 INCH CASS TX AMATEUR RADIO

QUARTER TO HALF INCH HAIL

0426 PM HAIL 2 NE DE QUEEN 34.06N 94.32W
04/10/2013 E0.70 INCH SEVIER AR AMATEUR RADIO

0702 PM HAIL 4 ESE SHREVEPORT 32.46N 93.73W
04/10/2013 E0.88 INCH CADDO LA TRAINED SPOTTER

HAIL COVERING THE GROUND

0702 PM HAIL 3 SW BOSSIER CITY 32.49N 93.71W
04/10/2013 E0.75 INCH CADDO LA OTHER FEDERAL

REPORTED AT SHREVEPORT-BARKSDALE HWY AND KNIGHT ST

0704 PM HAIL 4 E SHREVEPORT 32.48N 93.73W
04/10/2013 E0.50 INCH CADDO LA BROADCAST MEDIA

KTBS STUDIOS

0706 PM HAIL 5 SSW BOSSIER CITY 32.46N 93.71W
04/10/2013 E0.70 INCH CADDO LA AMATEUR RADIO

NEAR THE INTERSECTION OF ANNISTON AVE AND SOUTHFIELD RD

0710 PM HAIL 1 SSW BOSSIER CITY 32.50N 93.68W
04/10/2013 E0.50 INCH BOSSIER LA CO-OP OBSERVER

AT BARKSDALE AIR FORCE BASE

0715 PM HAIL 1 SSW RED CHUTE 32.56N 93.62W
04/10/2013 E0.70 INCH BOSSIER LA OTHER FEDERAL

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04-11-2013, 06:55 AM
Post: #23
4/09/13-4/11/13 first major outbreak of 2013?
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1247 AM CDT THU APR 11 2013

Quote: VALID 111200Z - 121200Z

...THERE IS A SLGT RISK OF SVR TSTMS FOR PARTS OF THE OH/TN VALLEYS
AND CNTRL/ERN GULF COAST STATES INTO THE CAROLINAS...

...SYNOPSIS...
A CLOSED UPPER LOW WILL SLOWLY MOVE FROM NEB INTO MN AS A SHORTWAVE
TROUGH MOVES THROUGH THE BASE OF THE LARGER SCALE TROUGH AND INTO
THE SRN APPALACHIANS BY FRIDAY MORNING. A NWD ADVANCE OF RICHER LOW
LEVEL MOISTURE WILL OCCUR ON THE WRN PERIPHERY OF A STUBBORN
ANTICYCLONE OVER THE WRN ATLANTIC AND AHEAD OF AN EWD MOVING COLD
FRONT. THE FRONT WILL MOVE FROM THE MS VALLEY TO E OF THE SPINE OF
THE CNTRL-SRN APPALACHIANS BY THE END OF THE PERIOD AS THE PRIMARY
LOW DEVELOPS EWD ALONG A STATIONARY FRONTAL ZONE LOCATED FROM THE OH
VALLEY EWD TO THE MID ATLANTIC STATES.

...OH/TN VALLEYS AND CNTRL/ERN GULF STATES INTO CAROLINAS...
A BROKEN BAND OF SHOWERS/TSTMS IS EXPECTED TO BE ONGOING NEAR THE
COLD FRONT OVER THE LOWER MS VALLEY NWD INTO THE LOWER OH VALLEY AT
THE START OF THE PERIOD. IT IS PROBABLE SOME OF THESE WILL
REGENERATE DURING THE DAY...ALONG WITH NEW TSTMS DEVELOPING AS THE
AIRMASS DESTABILIZES AHEAD OF THE ENCROACHING FRONT OVER THE OH/TN
VALLEYS SWD TOWARDS THE MOUTH OF THE MS RIVER.

A SECONDARY FRONTAL WAVE IS FORECAST IN RESPONSE TO THE SHORTWAVE
TROUGH AND WILL DEVELOP NEWD FROM THE LOWER MS VALLEY INTO THE SRN
APPALACHIANS. DMGG WINDS IN THE FORM OF STRONG TO SEVERE WIND GUSTS
AND THE POSSIBILITY FOR A TORNADO OR TWO WILL BE THE PRIMARY THREATS
WITH STORMS ALONG THE FRONT. MORE APPRECIABLE SURFACE HEATING IS
LIKELY WITH FARTHER S EXTENT...ESPECIALLY OVER AL/GA/FL PANHANDLE
WHERE MLCAPE IS FORECAST 750-1500 J/KG DURING PEAK HEATING. A
PERSISTENT SLY FETCH OF RICHER MARITIME AIR WILL LEAD TO AN
INCREASINGLY MOIST/DEEPER BOUNDARY LAYER OVER PARTS OF THE DEEP
SOUTH...WHERE DIURNALLY AUGMENTED LOW LEVEL CONFLUENCE BANDS MAY
FOSTER SCTD PRE-FRONTAL STORMS.

STRONG DEEP SWLY FLOW INCREASING IN HEIGHT WOULD FAVOR STORM
ORGANIZATION/ROTATION WITH THE MORE INTENSE/PERSISTENT UPDRAFTS. IT
APPEARS MID LEVEL LAPSE RATES WILL BECOME INCREASINGLY MARGINALIZED
WITH EWD EXTENT ACROSS THE NRN GULF STATES...THEREBY TENDING TO
LIMIT GREATER HAIL POTENTIAL BUT REMAINING HIGHEST WITH
QUASI-DISCRETE STORMS AHEAD OF THE FRONT. ALTHOUGH FORECAST
HODOGRAPH SIZE WILL REMAIN SOMEWHAT TEMPERED...A FEW TORNADOES MAY
BE POSSIBLE WITH ANY STRONGER UPDRAFTS THAT MANAGE TO DEVELOP AHEAD
OR EVENTUALLY MERGE AND BECOME EMBEDDED WITHIN A LINE. DESPITE
LESSENING INSTABILITY DURING THE EVENING HOURS INTO THE OVERNIGHT
OVER GA NEWD INTO THE CAROLINAS...A STRONG-SEVERE STORM THREAT
SHOULD PERSIST AS STORMS LIKELY MAINTAIN A FEED OF SURFACE-BASED
INFLOW PARCELS WITHIN A STRENGTHENING LOW LEVEL SHEAR ENVIRONMENT.

..SMITH/EDWARDS.. 04/11/2013

CLICK TO GET WUUS01 PTSDY1 PRODUCT

NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 1300Z
CURRENT UTC TIME: 1154Z (6:54AM), RELOAD THIS PAGE TO UPDATE THE TIME

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[TR]
[TD="class: zz, colspan: 2, align: center"]Mesoscale Discussion 441[/TD]
[/TR]
[TR]
[TD="align: center"] < Previous MD [/TD]
[/TR]
[TR]
[TD] [Image: mcd0441.gif] [/TD]
[/TR]
[TR]
[TD]
MESOSCALE DISCUSSION 0441 NWS STORM PREDICTION CENTER NORMAN OK 0655 AM CDT THU APR 11 2013 AREAS AFFECTED...SOUTH CENTRAL AND SERN LA/SRN MS CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE VALID 111155Z - 111300Z PROBABILITY OF WATCH ISSUANCE...60 PERCENT SUMMARY...A TORNADO WATCH MAY BE NEEDED BY MID MORNING ACROSS SOUTH CENTRAL-SERN LA INTO SRN MS. A LINE OF TSTMS DEVELOPING OVER SWRN LA IS EXPECTED TO EXPAND NNEWD AND SSWWD INTO A QUASI-LINER CONVECTIVE SYSTEM THIS MORNING AS IT ADVANCES EWD INTO THE MOIST AND DESTABILIZING WARM SECTOR OVER THE LOWER MS VALLEY. DISCUSSION...SURFACE OBSERVATIONS ACROSS THE DISCUSSION AREA SHOWED RICH MOISTURE ALREADY PRESENT /DEWPOINTS IN THE LOWER 70S ALONG THE SOUTH CENTRAL/SERN LA COAST TO MID-UPPER 60S IN SRN MS/. AT 1130Z...REGIONAL RADAR IMAGERY SHOWED A BAND OF TSTMS INCREASING SOME IN INTENSITY AND COOLING CLOUD TOPS PER IR SATELLITE IMAGERY. ALTHOUGH THIS ACTIVITY IS CURRENTLY POST-FRONTAL...00Z 4 KM WRF-NSSL AND NMM SUGGEST THESE STORMS WILL FURTHER GROW UPSCALE INTO A FORWARD PROPAGATING QLCS AS HEIGHT FALLS/DPVA WITH AN EJECTING SHORTWAVE TROUGH APPROACH THIS REGION. EFFECTIVE BULK SHEAR OF 40-50 KT WITH VECTORS ORIENTED PARALLEL TO THE FRONT/INITIATING BOUNDARY FAVOR LINEAR ORGANIZATION. WHILE DAMAGING WINDS WILL BE A THREAT...THE HIGHER MOISTURE CONTENT AIR /SURFACE DEWPOINTS AROUND 70 F/ AND ENHANCED LOW LEVEL SHEAR PER BACKED SELY SURFACE WINDS AND STRENGTHENING SLY LLJ WILL SUPPORT A TORNADO THREAT. VWP DATA AT SLIDELL LA WSR-88D INDICATED LOW LEVEL HODOGRAPH CURVATURE AND SFC-1 KM SHEAR OF 30 KT AND 0-1 KM SRH OF 225 M2/S2 --- MORE THAN SUFFICIENT FOR A TORNADO THREAT. ..PETERS/MEAD.. 04/11/2013[/TD]
[/TR]
[/TABLE]
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04-11-2013, 07:35 AM
Post: #24
4/09/13-4/11/13 first major outbreak of 2013?
';..

Quote:[TABLE]
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04-11-2013, 07:38 AM (This post was last modified: 04-11-2013 07:39 AM by Joe-Nathan.)
Post: #25
4/09/13-4/11/13 first major outbreak of 2013?
Joe-Nathan Wrote:MESOSCALE DISCUSSION 0441 NWS STORM PREDICTION CENTER NORMAN OK 0655 AM CDT THU APR 11 2013 AREAS AFFECTED...

guess you better get geared up and headed this way....

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04-11-2013, 07:51 AM
Post: #26
4/09/13-4/11/13 first major outbreak of 2013?
Day1

Quote:486
ACUS01 KWNS 111249
SWODY1
SPC AC 111247

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0747 AM CDT THU APR 11 2013

VALID 111300Z - 121200Z

...THERE IS A SLGT RISK OF SVR TSTMS FROM THE CNTRL AND ERN GULF
STATES INTO THE CNTRL APPALACHIANS...CAROLINAS...AND PARTS OF SRN
VA...

..SYNOPSIS

A NEUTRAL-TILT LONG-WAVE TROUGH OVER THE CNTRL CONUS WILL ASSUME AN
INCREASING NEGATIVE TILT AS A POTENT SHORT-WAVE TROUGH OVER SRN
TX/NERN MEXICO RAPIDLY TRANSLATES INTO THE CNTRL/SRN APPALACHIANS BY
FRI MORNING. THIS IMPULSE WILL BE ATTENDED BY MID AND UPPER-LEVEL
JET STREAKS AND A CORRIDOR OF ENHANCED FORCING FOR ASCENT WHICH WILL
OVERSPREAD THE GULF COAST STATES THIS FORECAST PERIOD.

IN THE LOW LEVELS...A SURFACE CYCLONE WILL SLOWLY DEVELOP EWD ACROSS
THE MID/UPPER OH VALLEY IN CONJUNCTION WITH A COLD FRONT ADVANCING
THROUGH THE TN VALLEY AND GULF COAST STATES. A FRONTAL WAVE FORMING
OVER S-CNTRL AL WILL PROPAGATE ALONG THE BOUNDARY INTO NRN AL BY
12/00Z BEFORE REACHING THE LEE OF THE CNTRL APPALACHIANS BY
12/12Z.

...CNTRL/ERN GULF STATES INTO THE CAROLINAS/SRN VA TODAY THROUGH
TONIGHT...

THE APPROACH OF THE SRN TX SHORT-WAVE TROUGH WILL CONTRIBUTE TO THE
INTENSIFICATION OF AN ALREADY-PRESENT LLJ ACROSS THE CNTRL GULF
STATES THIS AFTERNOON WITH THIS FEATURE EXPANDING IN BREADTH E OF
THE APPALACHIANS TONIGHT. THIS WILL HASTEN THE NWD FLUX OF AN
INCREASINGLY MOIST BOUNDARY LAYER OFF THE CNTRL/ERN G.O.M. AND WRN
ATLANTIC WITH DEWPOINTS RISING THROUGH THE 60S WITHIN THE WARM
SECTOR. WHEN COUPLED WITH A NARROW RIBBON OF RESIDUAL EML AND
DAYTIME HEATING...EXPECT PRE-FRONTAL AIR MASS TO BECOME MODERATELY
UNSTABLE BY AFTERNOON WITH MLCAPE VALUES APPROACHING
1000-1500 J/KG.

CURRENT SATELLITE/RADAR TRENDS INDICATE THAT DCVA/FORCING FOR ASCENT
ATTENDANT TO THE SRN TX SHORT-WAVE TROUGH IS RESULTING IN AN
INCREASE IN ELEVATED STORMS WITHIN THE POST-FRONTAL AIR MASS ALONG
THE TX COAST/SWRN LA. THE RAPID EWD PROGRESSION OF THIS IMPULSE
WILL GIVE RISE TO SURFACE-BASED TSTM DEVELOPMENT ALONG THE
ACCELERATING COLD FRONT LATER THIS MORNING...WITH EVENTUAL
CONSOLIDATION INTO A QLCS OVER THE CNTRL GULF STATES LATER TODAY.
FARTHER TO THE E...LATEST MODEL GUIDANCE INDICATES THE POTENTIAL FOR
MULTIPLE BANDS OF STORMS TO DEVELOP THIS AFTERNOON/EVENING WITHIN A
CONFLUENT FLOW LOW-LEVEL REGIME FROM ERN AL/WRN GA EWD ACROSS FL AND
SC.

STRENGTHENING DEEP-LAYER WIND FIELDS /INITIALLY CONFINED TO THE
FRONTAL CONVECTION/...WILL BE SUPPORTIVE OF BOWING AND SUPERCELL
STRUCTURES EMBEDDED WITHIN THE LARGER-SCALE CONVECTIVE SYSTEM WITH A
RISK FOR CORRIDORS OF WIND DAMAGE...TORNADOES...AND PERHAPS SOME
HAIL. THE STRONGER TROPOSPHERIC FLOW AND RESULTANT VERTICAL SHEAR
WILL GRADUALLY INCREASE THIS AFTERNOON INTO THIS EVENING ACROSS THE
DOWNSTREAM CONFLUENT STORM REGIME WITH A GROWING THREAT FOR
SUPERCELLS/BOWS SPREADING ACROSS GA INTO THE CAROLINAS /AND PERHAPS
SRN VA/ THIS EVENING INTO TONIGHT. A MAINLY DAMAGING WIND THREAT
WILL EXIST ACROSS THESE SAME AREAS WITH THE SUBSEQUENT PASSAGE OF
THE PRE-FRONTAL QLCS.

..OH/TN VALLEYS TODAY INTO THIS EVENING

CONVECTIVE OUTLFOW ASSOCIATED THE NRN EXTENSION OF A DECAYING LINEAR
MCS HAS ADVANCED INTO WRN OH AS OF 12Z...WELL TO THE EAST OF THE
SYNOPTIC COLD FRONT. MOREOVER...THE FEED OF 60+ F BOUNDARY LAYER
DEWPOINTS HAS BEEN CUT-OFF BY THE ONGOING CONVECTIVE BAND OVER THE
MID SOUTH WITH SURFACE TRAJECTORIES ORIGINATING FROM A DRIER
BOUNDARY OVER THE SRN APPALACHIANS. NONETHELESS...DAYTIME HEATING
COUPLED WITH COOLING MIDLEVEL TEMPERATURES WILL PROMOTE POCKETS OF
MODEST DESTABILIZATION WITH MLCAPE OF 500-1000 J/KG.

INCREASED FORCING FOR ASCENT COMBINED WITH CONVERGENCE ALONG THE
SYNOPTIC COLD FRONT AND RESIDUAL OUTFLOW BOUNDARIES WILL SUPPORT AN
INCREASE IN TSTM COVERAGE AND INTENSITY THROUGH THE PEAK OF THE
DIURNAL HEATING CYCLE. CONVECTION-ALLOWING MODELS SUGGEST THAT THE
NRN EXTENSION OF THE EVOLVING GULF COAST QLCS MAY IMPACT PARTS OF
TN/KY TODAY WITH SEPARATE CLUSTERS OF STORMS DEVELOPING AHEAD OF THE
SURFACE LOW OVER OH. DAMAGING WINDS AND SOME HAIL WILL BE THE
PRIMARY HAZARDS WITH THESE STORMS THROUGH THIS EVENING.

..MEAD/MARSH.. 04/11/2013

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04-11-2013, 08:04 AM
Post: #27
4/09/13-4/11/13 first major outbreak of 2013?
Tornado watch for LA and MS

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04-11-2013, 08:07 AM
Post: #28
4/09/13-4/11/13 first major outbreak of 2013?
[Image: ww0095_radar.gif]


URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 95
NWS STORM PREDICTION CENTER NORMAN OK
800 AM CDT THU APR 11 2013

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

SOUTHEAST LOUISIANA
SOUTHERN MISSISSIPPI
COASTAL WATERS

EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 800 AM UNTIL
300 PM CDT.

TORNADOES...HAIL TO 1 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 90 STATUTE
MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH NORTHWEST OF
PINE BELT MISSISSIPPI TO 35 MILES WEST SOUTHWEST OF HOUMA
LOUISIANA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).

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.

DISCUSSION...TSTMS ARE EXPECTED TO GRADUALLY INCREASE ACROSS THE
WATCH AREA THIS MORNING AS FORCING FOR ASCENT STRENGTHENS AHEAD OF
SHORT-WAVE TROUGH APPROACHING FROM SRN TX. CONTINUED
HEATING/MOISTENING OF THE PRE-FRONTAL BOUNDARY LAYER SHOULD
GRADUALLY REMOVE THE CAP OBSERVED BY THE 12Z REGIONAL
SOUNDINGS...YIELDING MLCAPE OF 1000-2000 J/KG. WHEN COUPLED WITH
MODERATELY STRONG LOW-LEVEL AND DEEP-LAYER SHEAR /SEE 12Z JAN
SOUNDING/...THE SETUP WILL SUPPORT A MIXTURE OF BOWING AND SUPERCELL
STRUCTURES CAPABLE OF DAMAGING WINDS AND A FEW TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 24030.


...MEAD

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04-11-2013, 10:59 AM
Post: #29
4/09/13-4/11/13 first major outbreak of 2013?
[Image: mcd0442.gif]

MESOSCALE DISCUSSION 0442
NWS STORM PREDICTION CENTER NORMAN OK
1041 AM CDT THU APR 11 2013

Quote: AREAS AFFECTED...ERN MS THROUGH NWRN AL AND MIDDLE TN

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

VALID 111541Z - 111745Z

PROBABILITY OF WATCH ISSUANCE...40 PERCENT

SUMMARY...STORMS ARE EXPECTED TO UNDERGO A SLOW BUT GRADUAL INCREASE
IN ORGANIZATION AND INTENSITY INTO THE AFTERNOON. PRIMARY THREAT
WILL BE ISOLATED DAMAGING WIND...BUT ISOLATED TORNADOES CANNOT BE
RULED OUT. AREA WILL CONTINUE TO BE MONITORED...AND ANY WW ISSUANCE
WILL ULTIMATELY DEPEND ON CONVECTIVE TRENDS.

DISCUSSION...EXPANSIVE SQUALL LINE EXTENDS FROM WEST OF NASHVILLE TN
SSWWD THROUGH ERN MS INTO SERN LA. A FEW SMALL BOWING SEGMENTS AND
MESO-VORTICES HAVE OCCASIONALLY BEEN OBSERVED WITHIN THE LINE...BUT
OVERALL STORMS HAVE BEEN NON-SEVERE THIS MORNING. SFC MESOANALYSIS
SHOW MOIST AXIS WITH DEWPOINTS FROM UPPER 60S OVER SERN MS/SRN AL TO
NEAR 60 OVER THE TN VALLEY. RICHER LOW-LEVEL MOISTURE WILL ADVECT
THROUGH SERN U.S. WARM SECTOR...BUT WIDESPREAD CLOUDS AND MODEST
LAPSE RATES SHOULD LIMIT MLCAPE TO AROUND 1500 J/KG OVER THE GULF
COASTAL STATES AND BELOW 1000 J/KG NORTHWARD INTO THE TN VALLEY.

MORNING RAOB FROM BIRMINGHAM INDICATE A CAPPING INVERSION PRESENT
JUST ABOVE 700 MB WHICH SHOULD TEND TO DELAY DEVELOPMENT OF MORE
ROBUST DISCRETE ACTIVITY WITH ERN EXTENT INTO THE WARM SECTOR. THIS
SUGGESTS MOST STORMS NEAR TERM WILL PROBABLY REMAIN CONFINED TO ZONE
OF FORCING ALONG THE OUTFLOW BOUNDARY ASSOCIATED WITH THE SQUALL
LINE. HOWEVER...RADAR TRENDS HAVE SHOWN AN INCREASE IN WARM SECTOR
CONVECTION OVER SERN MS. HERE...INFLUX OF MT AIR...A FEW CLOUD
BREAKS AND INFLUENCE FROM VORT MAX ROTATING THROUGH BASE OF UPPER
TROUGH MAY SUPPORT MORE ROBUST DISCRETE STORMS.

INITIALLY PRIMARY THREAT IS EXPECTED TO BE DAMAGING WIND AS STORMS
INTENSIFY AND BECOME BETTER ORGANIZED WITHIN THE ONGOING SQUALL
LINE. HOWEVER...DEEPENING OF CONVECTION IN WARM SECTOR MAY
EVENTUALLY OCCUR AS THE BOUNDARY LAYER GRADUALLY DESTABILIZES AND
CAPPING INVERSION ERODES. HODOGRAPHS AND EFFECTIVE BULK SHEAR WILL
REMAIN SUFFICIENT FOR A FEW EMBEDDED SUPERCELLS WITHIN THE LINE OR
WITH ANY CONVECTION THAT MAY DEEPEN IN WARM SECTOR DURING THE
AFTERNOON.

..DIAL/THOMPSON.. 04/11/2013

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04-11-2013, 12:56 PM (This post was last modified: 04-11-2013 12:59 PM by Joe-Nathan.)
Post: #30
4/09/13-4/11/13 first major outbreak of 2013?
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE JACKSON MS
1245 PM CDT THU APR 11 2013


Quote:.TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON

.DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.

..REMARKS..

1138 AM TORNADO 4 NW LIBERTY 32.70N 88.81W
04/11/2013 KEMPER MS EMERGENCY MNGR

*** 1 FATAL, 1 INJ *** HEAVY DAMAGE ALONG HWY 493. STEEL
BUILDING DESTROYED. EMERGENCY MANAGER REPORTS 1 FATALITY
AND 1 INJURY AT THAT LOCATION.

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