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

Monday, January 17, 2011

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

SPC Tornado Watch 5
Mon, 17 Jan 2011 10:28:02 -0600

URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 5 NWS STORM PREDICTION CENTER NORMAN OK 1125 AM EST MON JAN 17 2011 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF SOUTHERN FLORIDA COASTAL WATERS EFFECTIVE THIS MONDAY MORNING AND EVENING FROM 1125 AM UNTIL 700 PM EST. TORNADOES...HAIL TO 0.5 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 50 STATUTE MILES EITHER SIDE OF A LINE FROM 10 MILES WEST OF KEY WEST FLORIDA TO 40 MILES SOUTHEAST OF WEST PALM BEACH FLORIDA. 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...SHOWERS AND A FEW TSTMS EXPECTED TO PERSIST INVOF SHALLOW WARM FRONT EDGING NE ACROSS S FL THROUGH THIS AFTN. LOW LVL SHEAR EXPECTED TO REMAIN STRONGEST ALONG AND JUST NE OF FRONT...WITH SFC-BASED INSTABILITY MAXIMIZED TO ITS WEST. LARGE SCALE FORCING FOR ASCENT WILL REMAIN WEAK. BUT COMBINATION OF SIZABLE LOW LVL DIRECTIONAL SHEAR/LOW LCLS NEAR FRONT...PRESENCE OF A FEW LONG-LIVED UPDRAFTS...AND POTENTIAL FOR ADDITIONAL DEVELOPMENT AS AREA OF STORMS NOW OFF THE SE FL CST CONTINUES ENE SUGGESTS RISK FOR A COUPLE TORNADOES AND/OR LOCALLY DMGG WIND THROUGH EARLY EVE. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400. MEAN STORM MOTION VECTOR 24030. ...CORFIDI

SPC Tornado Watch 5 Status Reports
Mon, 17 Jan 2011 10:28:10 -0600

  STATUS FOR WATCH 0005 HAS NOT BEEN ISSUED YET

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