Compact News: NOAA's National Weather Service SPC Tornado/Severe Thunderstorm Watches Update

Sunday, October 24, 2010

NOAA's National Weather Service SPC Tornado/Severe Thunderstorm Watches Update

SPC Severe Thunderstorm Watch 709
Sun, 24 Oct 2010 20:49:03 -0500

URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 709 NWS STORM PREDICTION CENTER NORMAN OK 845 PM CDT SUN OCT 24 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF CENTRAL AND NORTHERN ALABAMA EXTREME SOUTHEAST ARKANSAS EXTREME NORTHEAST LOUISIANA CENTRAL AND NORTHERN MISSISSIPPI A SMALL PART OF SOUTHERN MIDDLE TENNESSEE EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 845 PM UNTIL 400 AM CDT. HAIL TO 2 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 75 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES NORTHEAST OF GADSDEN ALABAMA TO 40 MILES SOUTH OF MONTICELLO ARKANSAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9). 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...THIS SEVERE THUNDERSTORM WATCH REPLACES SEVERE THUNDERSTORM WATCH NUMBER 708. WATCH NUMBER 708 WILL NOT BE IN EFFECT AFTER 845 PM CDT. CONTINUE...WW 707... DISCUSSION...A COUPLE OF SCENARIOS EXPECTED TO UNFOLD OVERNIGHT...WITH LARGE HAIL AND DAMAGING WINDS POSSIBLE IN EACH. FIRST...ONGOING STORMS ACROSS SE AR/NRN MS WILL LIKELY PERSIST AND SPREAD EWD TOWARD NRN AL IN ADVANCE OF A SHORTWAVE TROUGH EJECTING EWD FROM NE TX. A BROAD UNDISTURBED WARM SECTOR WILL SUPPLY SUFFICIENT INSTABILITY TO MAINTAIN THE SEVERE THREAT OVERNIGHT...IN A VERTICAL SHEAR ENVIRONMENT SUPPORTIVE OF EMBEDDED SUPERCELLS AND BOWS. THE SECOND THREAT WILL BE A CONTINUATION OF THE SCATTERED SEVERE STORM/SUPERCELL THREAT ACROSS AL WITHIN THE CONFLUENCE ZONE AND CORRIDOR OF MOISTURE RETURNING NWD FROM THE GULF OF MEXICO. AVIATION...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 25025. ...THOMPSON

SPC Severe Thunderstorm Watch 709 Status Reports
Sun, 24 Oct 2010 20:49:11 -0500

  STATUS FOR WATCH 0709 HAS NOT BEEN ISSUED YET

To change your subscriptions or preferences or stop subscriptions anytime, log in to your User Profile with your e-mail address. For questions or problems with the service, contact support@govdelivery.com.

This service is provided by NOAA’s National Weather Service.