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

Sunday, February 27, 2011

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

SPC Severe Thunderstorm Watch 23
Sun, 27 Feb 2011 18:00:02 -0600

URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 23 NWS STORM PREDICTION CENTER NORMAN OK 535 PM CST SUN FEB 27 2011 THE NWS STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF WEST CENTRAL ILLINOIS NORTHEAST MISSOURI EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 535 PM UNTIL 1000 PM CST. HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 60 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 40 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 80 MILES WEST SOUTHWEST OF QUINCY ILLINOIS TO 75 MILES EAST OF QUINCY ILLINOIS. 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 20...WW 21...WW 22... DISCUSSION...CLUSTER OF STRONG/SEVERE THUNDERSTORMS ARE TRACKING ALONG SURFACE WARM FRONT INTO NORTHEAST MO...AND EVENTUALLY INTO CENTRAL IL. STORMS ARE PRIMARILY ELEVATED...WITH SEVERE HAIL BEING THE PRIMARY THREAT. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 50 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM MOTION VECTOR 24040. ...HART

SPC Tornado Watch 22
Sun, 27 Feb 2011 18:00:05 -0600

URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 22 NWS STORM PREDICTION CENTER NORMAN OK 435 PM CST SUN FEB 27 2011 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF CENTRAL KENTUCKY NORTHERN MIDDLE TENNESSEE EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 435 PM UNTIL 1000 PM CST. 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 NORTH AND SOUTH OF A LINE FROM 25 MILES SOUTHWEST OF FORT CAMPBELL KENTUCKY TO 85 MILES EAST OF BOWLING GREEN KENTUCKY. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2). 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 20...WW 21... DISCUSSION...AN ISOLATED SUPERCELL HAS FORMED WEST OF NASHVILLE...AND IS LIKELY TO PERSIST FOR A FEW HOURS ACROSS NORTHERN MIDDLE TN AND SOUTH-CENTRAL KY. OTHER STORMS MAY INTENSIFY OVER THIS REGION CHARACTERIZED BY STRONG LOW LEVEL WARM ADVECTION. FAVORABLE LOW AND DEEP LAYER VERTICAL SHEAR PROFILES WILL PROMOTE THE RISK OF TORNADOES...ALONG WITH 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 450. MEAN STORM MOTION VECTOR 24035. ...HART

SPC Tornado Watch 21
Sun, 27 Feb 2011 18:00:08 -0600

URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 21 NWS STORM PREDICTION CENTER NORMAN OK 250 PM CST SUN FEB 27 2011 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF SMALL PART OF SOUTH CENTRAL AND SOUTHEAST KANSAS NORTH CENTRAL OKLAHOMA EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 250 PM UNTIL 900 PM CST. 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 40 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES SOUTH SOUTHWEST OF ALVA OKLAHOMA TO 25 MILES EAST SOUTHEAST OF CHANUTE KANSAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1). 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 20... DISCUSSION...VISIBLE IMAGERY SHOWS DEEPENING CUMULUS NEAR AND E OF THE TRIPLE POINT ACROSS N CENTRAL OK. A SEPARATE BAND OF HIGH-BASED CUMULUS IN NW OK DEMARCATES THE STRONG DRY SURGE AND SUGGESTS AN INCREASE IN LOW-LEVEL CONVERGENCE/ASCENT NEAR THE TRIPLE POINT IN THE NEXT COUPLE OF HOURS. NOW THAT SURFACE TEMPERATURES HAVE WARMED INTO THE 70S...THE CAP IS WEAKENING AND THUNDERSTORM DEVELOPMENT APPEARS PROBABLE BY 22-23Z. STRONG DEEP-LAYER SHEAR AND MLCAPE APPROACHING 1500 J/KG WILL SUPPORT SUPERCELLS CAPABLE OF PRODUCING LARGE HAIL. A COUPLE OF TORNADOES WILL BE POSSIBLE GIVEN 0-1 KM SRH AOA 200 M2/S2 AND THE POTENTIAL FOR STORMS TO MOVE NEAR/ALONG THE SURFACE WARM FRONT THIS EVENING. 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 25040. ...THOMPSON

SPC Severe Thunderstorm Watch 20
Sun, 27 Feb 2011 18:00:12 -0600

URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 20 NWS STORM PREDICTION CENTER NORMAN OK 115 PM CST SUN FEB 27 2011 THE NWS STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF SOUTH CENTRAL INTO EAST CENTRAL KANSAS PARTS OF WESTERN AND NORTHERN MISSOURI EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 115 PM UNTIL 900 PM CST. 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 45 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 70 MILES NORTHEAST OF KNOB NOSTER MISSOURI TO 40 MILES SOUTHWEST OF HUTCHINSON KANSAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0). 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...ELEVATED THUNDERSTORMS ARE BEGINNING TO INTENSIFY OVER S CENTRAL KS...IMMEDIATELY N OF A SURFACE WARM FRONT. STEEP LAPSE RATES AND A FEED OF MOISTURE ABOVE THE COOL AIR MASS WILL SUPPORT MUCAPE ON THE ORDER OF 1500 J/KG...WHILE DEEP-LAYER VERTICAL SHEAR WILL BE FAVORABLE FOR EMBEDDED SUPERCELLS. LARGE HAIL WILL BE THE MAIN SEVERE THREAT...THOUGH AREAS IMMEDIATELY S OF THE WATCH AREA WILL BE MONITORED FOR A POSSIBLE TORNADO THREAT WITH STORMS ON THE WARM FRONT A LITTLE LATER THIS AFTERNOON. 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 450. MEAN STORM MOTION VECTOR 24040. ...THOMPSON

SPC Severe Thunderstorm Watch 23 Status Reports
Sun, 27 Feb 2011 18:00:04 -0600

  STATUS FOR WATCH 0023 HAS NOT BEEN ISSUED YET

SPC Tornado Watch 22 Status Reports
Sun, 27 Feb 2011 18:00:07 -0600

  STATUS REPORT ON WW 22  THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.  ..COHEN..02/27/11  ATTN...WFO...LMK...OHX...   STATUS REPORT FOR WT 22   SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS   KYC001-003-009-031-045-053-057-061-087-099-141-169-171-207-213- 217-227-280040-  KY  .    KENTUCKY COUNTIES INCLUDED ARE  ADAIR                ALLEN               BARREN               BUTLER               CASEY               CLINTON              CUMBERLAND           EDMONSON            GREEN                HART                 LOGAN               METCALFE             MONROE               RUSSELL             SIMPSON              TAYLOR               WARREN                 TNC021-027-037-043-049-083-085-087-111-125-133-137-141-147-159- 161-165-169-189-280040-  TN  .    TENNESSEE COUNTIES INCLUDED ARE  CHEATHAM             CLAY                DAVIDSON             DICKSON              FENTRESS            HOUSTON              HUMPHREYS            JACKSON             MACON                MONTGOMERY           OVERTON             PICKETT              PUTNAM               ROBERTSON           SMITH                STEWART              SUMNER              TROUSDALE

SPC Tornado Watch 21 Status Reports
Sun, 27 Feb 2011 18:00:11 -0600

  STATUS REPORT ON WW 21  THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.  ..COHEN..02/27/11  ATTN...WFO...ICT...OUN...TSA...   STATUS REPORT FOR WT 21   SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS   KSC019-035-049-099-125-133-191-205-280040-  KS  .    KANSAS COUNTIES INCLUDED ARE  CHAUTAUQUA           COWLEY              ELK                  LABETTE              MONTGOMERY          NEOSHO               SUMNER               WILSON                 OKC003-047-053-071-093-103-105-113-117-147-151-280040-  OK  .    OKLAHOMA COUNTIES INCLUDED ARE  ALFALFA              GARFIELD            GRANT                KAY                  MAJOR               NOBLE                NOWATA               OSAGE               PAWNEE               WASHINGTON           WOODS                  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 Severe Thunderstorm Watch 20 Status Reports
Sun, 27 Feb 2011 18:00:14 -0600

  STATUS REPORT ON WW 20  THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.  ..COHEN..02/27/11  ATTN...WFO...ICT...TOP...EAX...   STATUS REPORT FOR WS 20   SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS   KSC001-003-015-017-031-045-059-073-077-079-087-091-095-103-107- 111-113-115-121-127-139-155-173-177-191-197-207-209-280040-  KS  .    KANSAS COUNTIES INCLUDED ARE  ALLEN                ANDERSON            BUTLER               CHASE                COFFEY              DOUGLAS              FRANKLIN             GREENWOOD           HARPER               HARVEY               JEFFERSON           JOHNSON              KINGMAN              LEAVENWORTH         LINN                 LYON                 MCPHERSON           MARION               MIAMI                MORRIS              OSAGE                RENO                 SEDGWICK            SHAWNEE              SUMNER               WABAUNSEE           WOODSON              WYANDOTTE               MOC013-025-033-037-041-047-049-053-083-089-095-101-107-115-117- 121-159-165-175-177-195-280040-  MO  .    MISSOURI COUNTIES INCLUDED ARE  BATES                CALDWELL            CARROLL              CASS                 CHARITON            CLAY

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