...SELECTED STORM TOTAL SNOWFALL IN INCHES FROM 700 AM CDT THU APR 14 THROUGH 400 PM CDT FRI APR 15... ...NORTH DAKOTA... FLASHER 10.5 WISHEK 10.0 GLEN ULLIN 9.8 BRADDOCK 5 SE 9.0 FESSENDEN 7 SE 8.0 BISMARCK 10 N 7.6 HAZELTON 4 NW 7.4 HAZEN 0.4 SW 7.0 LEITH 7.0 SYKESTON 7.0 BOWDON 1 E 6.5 NAPOLEON 6.5 ...NEBRASKA... PAXTON 16.0 KINGSLEY DAM 10.2 IMPERIAL 10.0 VALENTINE 29 S 10.0 KILGORE 9.1 NORTH PLATTE 8 WNW 9.0 VALENTINE 9.0 WALLACE 2 W 7.0 OSHKOSH 10 NE 6.5 ...SOUTH DAKOTA... ISABEL 14 N 13.0 KADOKA 14 SSE 12.0 MARTIN 19.6 ENE 12.0 HAYES 6 E 11.0 PORCUPINE 5 E 10.0 MCINTOSH 8.7 WSW 9.7 HIGHMORE 19.1 NNW 8.5 SAINT FRANCIS 8 ESE 6.5
Friday, April 15, 2011
April 15 Snowstorm Totals
April 15: Tornado Watch #6
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 145
NWS STORM PREDICTION CENTER NORMAN OK
545 PM EDT FRI APR 15 2011
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
WESTERN AND NORTHERN GEORGIA
EFFECTIVE THIS FRIDAY AFTERNOON FROM 545 PM UNTIL MIDNIGHT EDT.
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 45 STATUTE
MILES EAST AND WEST OF A LINE FROM 90 MILES NORTH NORTHEAST OF
ATLANTA GEORGIA TO 20 MILES SOUTHEAST OF LA GRANGE GEORGIA. 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 141...WW 142...WW
143...WW 144...
DISCUSSION...AN ISOLATED SUPERCELL HAS RECENTLY INTENSIFIED NEAR THE
WARM FRONT ACROSS N GA...WHILE OTHER STORMS ARE INCREASING SLOWLY
JUST W OF THE ERN AL/GA BORDER. BOUNDARY LAYER DEWPOINTS IN THE
UPPER 50-LOWER 60S WILL BE SUFFICIENT TO SUPPORT SBCAPE OF AT LEAST
500-1000 J/KG...WHILE THE ATLANTA VWP SHOWS A WIND PROFILE CONDUCIVE
TO SUPERCELLS WITH A RISK FOR TORNADOES. OTHERWISE...ISOLATED LARGE
HAIL AND DAMAGING GUSTS CAN BE EXPECTED WITH THE STRONGER STORMS
THROUGH TONIGHT.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 24035.Introducing Hazards Posts 2.0
You may have seen the debut of our new Special Weather Watch this evening (Click here)
Now, we are debuting a whole system of those.
Similar to the NWS/SPC watches and warnings, a post is issued whenever there is a weather situation.
Below are BETA names for these new posts.
For tornado-related posts:
-Tornadic Condition Advisory/Watch/Warning
For severe thunderstorm-related posts:
-Elevated Weather Advisory/Watch/Warning
For minor posts (such as light rain or gusty winds):
-Minor Weather Advisory/Watch
For winter weather-related posts:
-Wintry Weather Advisory/Watch/Warning
For other types of posts (Stormy seas, flooding, high winds):
-Special Weather Advisory/Watch/Warning
Now, we are debuting a whole system of those.
Similar to the NWS/SPC watches and warnings, a post is issued whenever there is a weather situation.
Below are BETA names for these new posts.
For tornado-related posts:
-Tornadic Condition Advisory/Watch/Warning
For severe thunderstorm-related posts:
-Elevated Weather Advisory/Watch/Warning
For minor posts (such as light rain or gusty winds):
-Minor Weather Advisory/Watch
For winter weather-related posts:
-Wintry Weather Advisory/Watch/Warning
For other types of posts (Stormy seas, flooding, high winds):
-Special Weather Advisory/Watch/Warning
Special Weather Watch: April 15
Broadcast Level: URGENT
From The Weather Centre Headquarters
3:56pm CDT, April 15, 2011
This is a Special Weather Watch.
Issued April 15, 2011.
This Special Weather Watch has been issued for:
-Alabama
-Mississippi
At 3:56pm CDT... Radar detected blossoming supercells capable of producing tornadoes.
These storms will rake the entire portion of the area mentioned in this watch well into the night.
Threat Levels Index:
Tornadoes: HIGH
Violent Tornadoes: POSSIBLE
Hail: HIGH
Large Hail: HIGH
Damaging Winds: HIGH
This watch will expire at 11:59 pm CDT tonight.
From The Weather Centre Headquarters
3:56pm CDT, April 15, 2011
This is a Special Weather Watch.
Issued April 15, 2011.
This Special Weather Watch has been issued for:
-Alabama
-Mississippi
At 3:56pm CDT... Radar detected blossoming supercells capable of producing tornadoes.
These storms will rake the entire portion of the area mentioned in this watch well into the night.
Threat Levels Index:
Tornadoes: HIGH
Violent Tornadoes: POSSIBLE
Hail: HIGH
Large Hail: HIGH
Damaging Winds: HIGH
This watch will expire at 11:59 pm CDT tonight.
April 15: Tornado Watch #5
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 144
NWS STORM PREDICTION CENTER NORMAN OK
240 PM CDT FRI APR 15 2011
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
CENTRAL AND EASTERN LOUISIANA
CENTRAL AND SOUTHERN MISSISSIPPI
COASTAL WATERS
EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 240 PM UNTIL
1000 PM CDT.
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 EAST AND WEST OF A LINE FROM 15 MILES NORTH NORTHEAST OF
COLUMBUS MISSISSIPPI TO 15 MILES SOUTHEAST OF LAFAYETTE
LOUISIANA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).
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 140...WW 141...WW
142...WW 143...
DISCUSSION...PRE-FRONTAL CLUSTER OF TORNADIC SUPERCELLS OVER
PORTIONS OF CNTRL MS WILL PROGRESS EWD TOWARD THE AL BORDER WITH
ADDITIONAL STORMS INTENSIFYING THIS AFTERNOON ALONG COLD
FRONT/DRYLINE FROM WRN MS INTO CNTRL LA. AMBIENT WARM SECTOR AIR
MASS IS WARM AND QUITE MOIST WITH MLCAPE VALUES OF 1000-2000 J/KG.
THE STRONGEST LOW-LEVEL SHEAR AND RESULTANT GREATEST SIGNIFICANT
TORNADO THREAT WILL EXIST FROM JUST E OF JAN TO MEI WHERE AMBIENT
STREAMWISE VORTICITY IS BEING AUGMENTED BY A DIFFERENTIAL
HEATING/OUTFLOW BOUNDARY. ELSEWHERE THE COMBINATION OF EFFECTIVE
BULK SHEAR OF 50-60 KT AND EFFECTIVE SRH OF 150-300 M2/S2 WILL BE
SUPPORTIVE OF SUPERCELLS CAPABLE OF TORNADOES...LARGE HAIL AND
DAMAGING WINDS.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 26035.
Subscribe to:
Posts (Atom)