No Mesoscale Discussions are in effect as of Thu Mar 11 18:06:03 UTC 2010.

WW 0029 Status Reports
STATUS FOR WATCH 0029 HAS NOT BEEN ISSUE YET Read more

WW 29 TORNADO FL CW 111600Z - 112300Z
URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 29 NWS STORM PREDICTION CENTER NORMAN OK 1100 AM EST THU MAR 11 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF MUCH OF CENTRAL FLORIDA PENINSULA COASTAL WATERS EFFECTIVE THIS THURSDAY MORNING AND EVENING FROM 1100 AM UNTIL 600 PM EST. 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 65 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 60 MILES WEST NORTHWEST OF SAINT PETERSBURG FLORIDA TO 30 MILES EAST NORTHEAST OF MELBOURNE FLORIDA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9). 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...STRONG/VEERING SHEAR PROFILES COUPLED WITH A MOIST AND MODESTLY UNSTABLE AIR MASS WILL SUPPORT SUPERCELL DEVELOPMENT MOVING EWD OFF GULF ACROSS CENTRAL FL. PRIMARY THREAT WILL BE TORNADOES ASSOCIATED WITH ANY SUPERCELL. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND Read more

SPC 1730Z Day 2 Outlook
DAY 2 CONVECTIVE OUTLOOK NWS STORM PREDICTION CENTER NORMAN OK 1134 AM CST THU MAR 11 2010 VALID 121200Z - 131200Z ...THERE IS A SLGT RISK OF SVR TSTMS ACROSS PORTIONS OF THE SERN STATES... ...THERE IS A SLGT RISK OF SVR TSTMS ACROSS S FL... ...SYNOPSIS... CENTROID OF CLOSED/EXTENSIVE LONGWAVE TROUGH WILL SLOWLY PIVOT ESEWD OVER THE LOWER MO/MIDDLE MS RIVER VALLEYS TO THE MID SOUTH ON FRIDAY. MEANWHILE...DETERMINISTIC MODELS AGREE THAT A SRN PERIPHERY SHORTWAVE TROUGH WILL PROGRESS NEWD FROM THE LOWER MS VALLEY THROUGH THE TN VALLEY/LOWER OH VALLEY FRIDAY AFTERNOON...AND THEN TRACK WWD TOWARD NRN MO IN NRN PERIPHERY OF LARGER CLOSED LOW. SRN EXTENT OF THE LOWER MS VALLEY SHORTWAVE TROUGH WILL MOVE EWD THROUGH THE CENTRAL/NERN GULF COAST STATES TO OFF THE SRN ATLANTIC COAST BY 12Z SATURDAY. THE EVOLUTION OF THE UPPER LEVEL FEATURES EAST OF THE ROCKIES WILL OCCUR IN CONJUNCTION WITH PHASING POLAR/SUBTROPICAL Read more

SPC 1630Z Day 1 Outlook
DAY 1 CONVECTIVE OUTLOOK NWS STORM PREDICTION CENTER NORMAN OK 1015 AM CST THU MAR 11 2010 VALID 111630Z - 121200Z ...THERE IS A SLGT RISK OF SVR TSTMS FLORIDA PENINSULA... ...THERE IS A SLGT RISK OF SVR TSTMS OVER PARTS OF THE LWR MS AND TN VLYS... ...SYNOPSIS... FINAL IN SERIES OF VIGOROUS TROUGHS CURRENTLY SRN NM/TX BIG BEND WILL MOVE TO LOWER MS VALLEY BY 12Z FRI AS OCCLUDED LOW OVER WRN IA GRADUALLY FILLS AND REMAINS QUASI STATIONARY. ADDITIONALLY AN UNUSUALLY STRONG MID/UPPER JET STREAK CONTINUES TO TRANSLATE EWD ACROSS NRN GULF OF MEXICO PROVIDING STRONG SHEAR AND LARGE SCALE UPPER DIVERGENCE ACROSS NERN GULF AND FL IN THE EXIT REGION. ...FL... ACTIVE MCS OVER NERN GULF OF MEXICO THIS AM WITH STRONG MOIST ADVECTION ACROSS THE FL PENINSULA. GIVEN THE EXTENSIVE CLOUD COVER Read more

WW 0029 Status Reports
STATUS FOR WATCH 0029 HAS NOT BEEN ISSUE YET Read more

No watches are valid as of Thu Mar 11 13:32:02 UTC 2010.

WW 0028 Status Reports
STATUS FOR WATCH 0028 HAS NOT BEEN ISSUE YET Read more

WW 28 TORNADO MS TN 110740Z - 111500Z
URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 28 NWS STORM PREDICTION CENTER NORMAN OK 140 AM CST THU MAR 11 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF CENTRAL...NORTHERN AND EASTERN MISSISSIPPI WESTERN TENNESSEE EFFECTIVE THIS THURSDAY MORNING FROM 140 AM UNTIL 900 AM CST. 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 55 STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES NORTHEAST OF DYERSBURG TENNESSEE TO 50 MILES SOUTHEAST OF JACKSON MISSISSIPPI. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8). 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...THIS TORNADO WATCH REPLACES TORNADO WATCH NUMBER 25. WATCH NUMBER 25 WILL NOT BE IN EFFECT AFTER 140 AM CST. CONTINUE...WW 27... DISCUSSION...BROKEN BANDS OF STORMS WITH EMBEDDED SUPERCELLS/LEWPS EXPECTED TO PERSIST OVER PARTS OF MS AND W TN FOR SEVERAL MORE HOURS /REF MCD 179/. LOW-LVL WIND PROFILES AND MOISTURE AVAILABILITY WILL BE MOST FAVORABLE FOR TORNADOES OVER CNTRL/ERN MS...BUT LARGE SCALE Read more

MD 0181 CONCERNING TORNADO WATCH 28... FOR PORTIONS SRN/ERN MS...WRN/NRN AL...MIDDLE TN.
MESOSCALE DISCUSSION 0181 NWS STORM PREDICTION CENTER NORMAN OK 0436 AM CST THU MAR 11 2010 AREAS AFFECTED...PORTIONS SRN/ERN MS...WRN/NRN AL...MIDDLE TN. CONCERNING...TORNADO WATCH 28... VALID 111036Z - 111230Z THE SEVERE WEATHER THREAT FOR TORNADO WATCH 28 CONTINUES. WW MAY BE CLEARED BEHIND PRIMARY CONVECTIVE BAND...AS IT WEAKENS AND EXITS WW FROM N-S ACROSS ERN MS. ONE SPOT OF TSTM WIND DAMAGE WAS REPORTED AT 911Z IN SCOTT COUNTY MS. ALTHOUGH OVERALL Read more

MD 0180 CONCERNING SEVERE POTENTIAL...WATCH UNLIKELY FOR PORTIONS S-CENTRAL/SERN PANHANDLE OF FL.
MESOSCALE DISCUSSION 0180 NWS STORM PREDICTION CENTER NORMAN OK 0317 AM CST THU MAR 11 2010 AREAS AFFECTED...PORTIONS S-CENTRAL/SERN PANHANDLE OF FL. CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY VALID 110917Z - 111115Z ZONALLY ALIGNED BAND OF NUMEROUS TSTMS...INITIALLY EVIDENT OFFSHORE FL PANHANDLE AND AL COAST...IS EXPECTED TO CONTINUE MOVING VERY SLIGHTLY NWD OF DUE E. MOST INTENSE CONVECTION IS EXPECTED TO REMAIN OFFSHORE AL AND WRN FL PANHANDLE...BUT WILL AFFECT THAT PORTION EXTENDING GULFWARD FROM CAPE SAN BLAS ACROSS AAF AREA AT ST. Read more

SPC 0700Z Day 2 Outlook
DAY 2 CONVECTIVE OUTLOOK NWS STORM PREDICTION CENTER NORMAN OK 0100 AM CST THU MAR 11 2010 VALID 121200Z - 131200Z ...THERE IS A SLGT RISK OF SVR TSTMS ACROSS THE SOUTHERN HALF OF THE FL PENINSULA... ...THERE IS A SLGT RISK OF SVR TSTMS ACROSS PORTIONS OF AL/GA AND SOUTHERN APPALACHIANS... ...SYNOPSIS... CENTROID OF CLOSED/EXTENSIVE LONGWAVE TROUGH WILL SLOWLY PIVOT EAST-SOUTHEASTWARD OVER THE LOWER MO/MIDDLE MS RIVER VALLEYS ON FRIDAY...WITH A SOUTHERN PERIPHERY/BASAL SHORTWAVE TROUGH PROGRESSING EAST-NORTHEASTWARD OVER THE GULF COAST STATES/TN VALLEY IN CONJUNCTION WITH PHASING POLAR/SUBTROPICAL JETS OVER THE GULF OF MEXICO/SOUTHEAST STATES/FL PENINSULA. IN THE WEST...THE INLAND ADVANCEMENT OF A CONSIDERABLE UPPER TROUGH AND STEEPENING LAPSE RATES IN THE WAKE OF ASSOCIATED COLD FRONT MAY YIELD ISOLATED TSTMS FOR COASTAL PORTIONS OF THE PACIFIC NORTHWEST/NORTHERN CA AND OFFSHORE PACIFIC WATERS. Read more

SPC 1200Z Day 1 Outlook
DAY 1 CONVECTIVE OUTLOOK NWS STORM PREDICTION CENTER NORMAN OK 1131 PM CST WED MAR 10 2010 VALID 111200Z - 121200Z ...THERE IS A SLGT RISK OF SVR TSTMS ACROSS MUCH OF FL... ...SYNOPSIS... BROAD UPPER LOW WILL PERSIST OVER THE CNTRL U.S. THURSDAY. SEVERAL VORTICITY MAXIMA WILL CONTINUE TO ROTATE THROUGH THIS FEATURE. THE VORT MAX OVER ERN KS/WRN MO AS OF WEDNESDAY EVENING IS FORECAST TO LIFT NWD INTO ERN NEB/IA...WHILE VORT MAX CURRENTLY OVER THE SWRN U.S. WILL CONTINUE ESEWD...REACHING THE LOWER MS VALLEY BY THE END OF THE PERIOD. INITIAL SURFACE LOW WILL OCCLUDE OVER THE UPPER MS VALLEY WITH TRAILING FRONT EXTENDING SWD THROUGH WRN PARTS OF THE TN AND LOWER MS VALLEY. SECONDARY LOW SHOULD DEVELOP OVER THE LOWER MS VALLEY THURSDAY NIGHT IN ASSOCIATION WITH APPROACHING IMPULSE. A Read more

WW 0026 Status Reports
STATUS FOR WATCH 0026 HAS NOT BEEN ISSUE YET Read more

WW 26 TORNADO LA MS CW 110145Z - 110800Z
URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 26 NWS STORM PREDICTION CENTER NORMAN OK 745 PM CST WED MAR 10 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF SOUTHEAST LOUISIANA EXTREME SOUTHERN MISSISSIPPI COASTAL WATERS EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 745 PM UNTIL 200 AM CST. 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 NORTH AND SOUTH OF A LINE FROM 65 MILES SOUTHEAST OF GULFPORT MISSISSIPPI TO 35 MILES SOUTH SOUTHWEST OF BATON ROUGE LOUISIANA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6). 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 21...WW 22...WW 23...WW 24...WW 25... DISCUSSION...SCATTERED THUNDERSTORMS ARE INCREASING BENEATH STRONG JET DYNAMICS OVER SOUTHERN LA. THESE STORMS ARE LIKELY TO SPREAD Read more

WW 0025 Status Reports
STATUS FOR WATCH 0025 HAS NOT BEEN ISSUE YET Read more

WW 25 TORNADO AL AR LA MS 110125Z - 110800Z
URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 25 NWS STORM PREDICTION CENTER NORMAN OK 725 PM CST WED MAR 10 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF WESTERN ALABAMA SOUTHEAST ARKANSAS NORTHEAST LOUISIANA CENTRAL MISSISSIPPI EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 725 PM UNTIL 200 AM CST. 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 75 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 75 MILES SOUTH SOUTHEAST OF TUSCALOOSA ALABAMA TO 40 MILES SOUTH SOUTHWEST OF MONTICELLO ARKANSAS. 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. OTHER WATCH INFORMATION...CONTINUE...WW 21...WW 22...WW 23...WW 24... DISCUSSION...ISOLATED STRONG/SEVERE STORMS CONTINUE TO AFFECT PARTS Read more

WW 0027 Status Reports
STATUS FOR WATCH 0027 HAS NOT BEEN ISSUE YET Read more

WW 27 TORNADO AR IL KY MO MS TN 110150Z - 110800Z
URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 27 NWS STORM PREDICTION CENTER NORMAN OK 750 PM CST WED MAR 10 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF EASTERN ARKANSAS SOUTHWEST ILLINOIS FAR WESTERN KENTUCKY SOUTHEAST MISSOURI NORTHWEST MISSISSIPPI FAR WESTERN TENNESSEE EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 750 PM UNTIL 200 AM CST. 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 80 STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES NORTHEAST OF SAINT LOUIS MISSOURI TO 55 MILES EAST OF PINE BLUFF ARKANSAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7). 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 21...WW 22...WW 23...WW 24...WW 25...WW 26... Read more

MD 0177 CONCERNING TORNADO WATCH 25... FOR FAR NERN LA / FAR SERN AR / CNTRL LA INTO W-CNTRL AL
MESOSCALE DISCUSSION 0177 NWS STORM PREDICTION CENTER NORMAN OK 1023 PM CST WED MAR 10 2010 AREAS AFFECTED...FAR NERN LA / FAR SERN AR / CNTRL LA INTO W-CNTRL AL CONCERNING...TORNADO WATCH 25... VALID 110423Z - 110530Z THE SEVERE WEATHER THREAT FOR TORNADO WATCH 25 CONTINUES. THE THREAT FOR SEVERE STORMS CAPABLE OF HAIL...ISOLATED TORNADOES AND LOCALLY EXCESSIVE RAINFALL CONTINUES OVER WW AREA. Read more