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

Monday, November 22, 2010

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

SPC Tornado Watch 747
Mon, 22 Nov 2010 18:00:04 -0600

URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 747 NWS STORM PREDICTION CENTER NORMAN OK 615 PM EST MON NOV 22 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF NORTHEAST ILLINOIS NORTHERN AND WESTERN INDIANA WESTERN AND SOUTHERN LOWER MICHIGAN LAKE MICHIGAN EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 615 PM UNTIL 200 AM 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 60 STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES EAST OF BLOOMINGTON ILLINOIS TO 40 MILES NORTHEAST OF ROBEN HOOD MICHIGAN. 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 744...WW 745...WW 746... DISCUSSION...COLD FRONTAL AND PRE-FRONTAL STORMS NOW OVER LK MI AND CNTRL/NRN IL EXPECTED TO CONTINUE MOVING/DEVELOPING ENEWD AS FRONT STRENGTHENS WITH THE APPROACH OF UPSTREAM SHORTWAVE IMPULSE. WHILE LOW LVL BUOYANCY WILL DIMINISH WITH NIGHTFALL...STRENGTH OF BOTH LOW-LVL AND DEEP SHEAR SUGGESTS POSSIBILITY FOR SUPERCELLS AND EVEN A COUPLE TORNADOES AS THE STORMS EVOLVE INTO BROKEN LINE SEGMENTS/LEWPS. AVIATION...TORNADOES AND 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 400. MEAN STORM MOTION VECTOR 24055. ...CORFIDI

SPC Tornado Watch 746
Mon, 22 Nov 2010 18:00:07 -0600

URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 746 NWS STORM PREDICTION CENTER NORMAN OK 450 PM CST MON NOV 22 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF CENTRAL ILLINOIS SOUTHERN THROUGH EAST CENTRAL MISSOURI EFFECTIVE THIS MONDAY AFTERNOON FROM 450 PM UNTIL MIDNIGHT CST. TORNADOES...HAIL TO 1.5 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 70 STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH OF CHAMPAIGN ILLINOIS TO 50 MILES SOUTH SOUTHEAST OF SPRINGFIELD MISSOURI. 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 744...WW 745... DISCUSSION...TSTMS EXPECTED TO INCREASE IN COVERAGE AND POSSIBLY STRENGTH ALONG AND JUST AHEAD OF INTENSIFYING COLD FRONT MOVING ESE FROM CNTRL/SW MO. FRONTAL UPLIFT AND LARGER SCALE UVV MAY BE ENHANCED WITH TIME AS SECOND IMPULSE ASSOCIATED WITH BROADER SHORTWAVE TROUGH CROSSING THE CNTRL PLNS CONTINUES EWD AND GLANCES FRONTAL ZONE. VERY STRONG DEEP WIND FIELD...SEASONABLY MOIST BOUNDARY LAYER INFLOW...AND RELATIVELY STEEP LOW LVL LAPSE RATES SUGGEST POTENTIAL FOR A FEW SEMI-DISCRETE SUPERCELLS POSING A THREAT FOR TORNADOES...IN ADDITION TO SVR HAIL/WIND. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM MOTION VECTOR 25050. ...CORFIDI

SPC Tornado Watch 747 Status Reports
Mon, 22 Nov 2010 18:00:06 -0600

  STATUS FOR WATCH 0747 HAS NOT BEEN ISSUED YET

SPC Tornado Watch 746 Status Reports
Mon, 22 Nov 2010 18:00:09 -0600

  STATUS FOR WATCH 0746 HAS NOT BEEN ISSUED YET

SPC Tornado Watch 745 Status Reports
Mon, 22 Nov 2010 18:00:13 -0600

  STATUS REPORT ON WW 745  SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 SW RAC TO 40 NW MKE.  ..GARNER..11/22/10  ATTN...WFO...MKX...   STATUS REPORT FOR WT 745   SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS   WIC059-079-089-101-222340-  WI  .    WISCONSIN COUNTIES INCLUDED ARE  KENOSHA              MILWAUKEE           OZAUKEE              RACINE                  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.

SPC Tornado Watch 744 Status Reports
Mon, 22 Nov 2010 18:00:16 -0600

  STATUS REPORT ON WW 744  SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 50 S UIN TO 15 E PIA TO 20 SSW RAC.  WW 744 WILL BE ALLOWED TO EXPIRE AT 230000Z.  ..GARNER..11/22/10  ATTN...WFO...DVN...LSX...LOT...ILX...   STATUS REPORT FOR WT 744   SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS   ILC017-031-043-061-089-097-099-107-113-125-129-137-167-171-179- 203-230000-  IL  .    ILLINOIS COUNTIES INCLUDED ARE  CASS                 COOK                DUPAGE               GREENE               KANE                LAKE                 LA SALLE             LOGAN               MCLEAN               MASON                MENARD              MORGAN               SANGAMON             SCOTT               TAZEWELL             WOODFORD                LMZ740-741-742-230000-  CW   .    ADJACENT COASTAL WATERS INCLUDED ARE  LMZ740   LMZ741

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