SPC Watches

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SPC Severe Thunderstorm Watch 555

WW 555 SEVERE TSTM ND SD WY 312115Z - 010400Z
        
WW 0555 Thumbnail Image

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 555
NWS STORM PREDICTION CENTER NORMAN OK
415 PM CDT SAT JUL 31 2010

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 

       PARTS OF SOUTHWEST NORTH DAKOTA
       MUCH OF WESTERN SOUTH DAKOTA
       PARTS OF NORTHEAST WYOMING

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 415 PM UNTIL
1100 PM CDT.

HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 85
STATUTE MILES EAST AND WEST OF A LINE FROM 70 MILES NORTHEAST OF
LEMMON SOUTH DAKOTA TO 85 MILES WEST SOUTHWEST OF RAPID CITY
SOUTH DAKOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

OTHER WATCH INFORMATION...CONTINUE...WW 552...WW 553...WW 554...

DISCUSSION...SCATTERED STRONG/SEVERE THUNDERSTORMS WILL DEVELOP IN
AREA OF LOW LEVEL CONVERGENCE AND MDT INSTABILITY.  WITH STEEP LAPSE
RATES DAMAGING WINDS ALONG WITH LARGE HAIL WILL BE ASSOCIATED WITH
MOST INTENSE STORMS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM
MOTION VECTOR 26025.


...HALES

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SPC Severe Thunderstorm Watch 555

WW 555 SEVERE TSTM ND SD WY 312115Z - 010400Z
        
WW 0555 Thumbnail Image

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 555
NWS STORM PREDICTION CENTER NORMAN OK
415 PM CDT SAT JUL 31 2010

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 

       PARTS OF SOUTHWEST NORTH DAKOTA
       MUCH OF WESTERN SOUTH DAKOTA
       PARTS OF NORTHEAST WYOMING

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 415 PM UNTIL
1100 PM CDT.

HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 85
STATUTE MILES EAST AND WEST OF A LINE FROM 70 MILES NORTHEAST OF
LEMMON SOUTH DAKOTA TO 85 MILES WEST SOUTHWEST OF RAPID CITY
SOUTH DAKOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

OTHER WATCH INFORMATION...CONTINUE...WW 552...WW 553...WW 554...

DISCUSSION...SCATTERED STRONG/SEVERE THUNDERSTORMS WILL DEVELOP IN
AREA OF LOW LEVEL CONVERGENCE AND MDT INSTABILITY.  WITH STEEP LAPSE
RATES DAMAGING WINDS ALONG WITH LARGE HAIL WILL BE ASSOCIATED WITH
MOST INTENSE STORMS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM
MOTION VECTOR 26025.


...HALES

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SPC Severe Thunderstorm Watch 555

WW 555 SEVERE TSTM ND SD WY 312115Z - 010400Z
        
WW 0555 Thumbnail Image

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 555
NWS STORM PREDICTION CENTER NORMAN OK
415 PM CDT SAT JUL 31 2010

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 

       PARTS OF SOUTHWEST NORTH DAKOTA
       MUCH OF WESTERN SOUTH DAKOTA
       PARTS OF NORTHEAST WYOMING

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 415 PM UNTIL
1100 PM CDT.

HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 85
STATUTE MILES EAST AND WEST OF A LINE FROM 70 MILES NORTHEAST OF
LEMMON SOUTH DAKOTA TO 85 MILES WEST SOUTHWEST OF RAPID CITY
SOUTH DAKOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

OTHER WATCH INFORMATION...CONTINUE...WW 552...WW 553...WW 554...

DISCUSSION...SCATTERED STRONG/SEVERE THUNDERSTORMS WILL DEVELOP IN
AREA OF LOW LEVEL CONVERGENCE AND MDT INSTABILITY.  WITH STEEP LAPSE
RATES DAMAGING WINDS ALONG WITH LARGE HAIL WILL BE ASSOCIATED WITH
MOST INTENSE STORMS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM
MOTION VECTOR 26025.


...HALES

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SPC Severe Thunderstorm Watch 553

WW 553 SEVERE TSTM KY TN 311850Z - 010200Z
        
WW 0553 Thumbnail Image

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 553
NWS STORM PREDICTION CENTER NORMAN OK
250 PM EDT SAT JUL 31 2010

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 

       PARTS OF WESTERN AND SOUTHERN KENTUCKY
       MIDDLE TENNESSEE

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 250 PM UNTIL
1000 PM EDT.

HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 85
STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES WEST OF
CHATTANOOGA TENNESSEE TO 35 MILES WEST NORTHWEST OF BOWLING GREEN
KENTUCKY.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

OTHER WATCH INFORMATION...CONTINUE...WW 552...

DISCUSSION...THUNDERSTORMS WILL INCREASE IN NUMBER AND INTENSITY
ACROSS THE WATCH WITH THE AIR MASS NOW MDTLY UNSTABLE...VERY MOIST
AND VIRTUALLY UNCAPPED.  WITH 30KT OF SHEAR PRIMARY THREAT WILL BE
DAMAGING WINDS...PARTICULARLY AS STORMS EVOLVE INTO CLUSTERS/LINE
SEGMENTS AND ACCOMPANYING COLD POOLS.

AVIATION...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 550. MEAN STORM MOTION
VECTOR 29025.


...HALES

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SPC Severe Thunderstorm Watch 552

WW 552 SEVERE TSTM GA SC CW 311730Z - 010200Z
        
WW 0552 Thumbnail Image

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 552
NWS STORM PREDICTION CENTER NORMAN OK
130 PM EDT SAT JUL 31 2010

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 

       LARGE PART OF NORTHERN AND EASTERN GEORGIA
       MUCH OF WESTERN AND SOUTHERN SOUTH CAROLINA
       COASTAL WATERS

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 130 PM UNTIL
1000 PM EDT.

HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 115
STATUTE MILES EAST AND WEST OF A LINE FROM 75 MILES WEST
NORTHWEST OF ANDERSON SOUTH CAROLINA TO 65 MILES EAST SOUTHEAST
OF SAVANNAH GEORGIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE
THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

DISCUSSION...BAND OF THUNDERSTORMS NOW CROSSING SRN APPALACHIANS
WILL INCREASE IN INTENSITY AS THEY MOVE SEWD INTO A MDTLY UNSTABLE
AND VERY MOIST AIR MASS.  ADDITIONAL SEVERE STORMS ARE LIKELY IN
ADVANCE OF THE DEVELOPING LINE IN THE UNSTABLE AIR MASS SEWD THRU
ERN GA/SRN SC.  PRIMARY THREAT WILL BE DAMAGING WINDS...PARTICULARLY
WHERE LINE SEGMENT/CLUSTERS CAN DEVELOP ORGANIZED COLD POOLS.

AVIATION...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 550. MEAN STORM MOTION
VECTOR 29025.


...HALES

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SPC Severe Thunderstorm Watch 556 Status Reports

WW 0556 Status Reports
      
WW 0556 Thumbnail Image

STATUS FOR WATCH 0556 HAS NOT BEEN ISSUED YET
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SPC Severe Thunderstorm Watch 554 Status Reports

WW 0554 Status Reports
      
WW 0554 Thumbnail Image

STATUS REPORT ON WW 554

THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.

..GOSS..07/31/10

ATTN...WFO...TFX...MSO...BYZ...GGW...


STATUS REPORT FOR WS 554 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

MTC001-003-005-007-009-013-015-023-027-031-037-039-041-043-045-
049-057-059-065-067-069-071-077-081-093-095-097-099-107-111-
010040-

MT 
.    MONTANA COUNTIES INCLUDED ARE

BEAVERHEAD           BIG HORN            BLAINE              
BROADWATER           CARBON              CASCADE             
CHOUTEAU             DEER LODGE          FERGUS              
GALLATIN             GOLDEN VALLEY       GRANITE             
HILL                 JEFFERSON           JUDITH BASIN        
LEWIS AND CLARK      MADISON             MEAGHER             
MUSSELSHELL          PARK                PETROLEUM           
PHILLIPS             POWELL              RAVALLI             
SILVER BOW           STILLWATER          SWEET GRASS         
TETON                WHEATLAND           YELLOWSTONE         


THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY.  PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.

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