Tornado Watch Up - High Threat for Tornadoes
Posted by JAC on 4/9/2011, 6:59 pm
http://www.spc.noaa.gov/products/watch/ww0116.html





URGENT - IMMEDIATE BROADCAST REQUESTED
  TORNADO WATCH NUMBER 116
  NWS STORM PREDICTION CENTER NORMAN OK
  550 PM CDT SAT APR 9 2011
 
  THE NWS STORM PREDICTION CENTER HAS ISSUED A
  TORNADO WATCH FOR PORTIONS OF
 
         WESTERN AND NORTHERN IOWA
         EASTERN NEBRASKA
         SOUTHEAST SOUTH DAKOTA
 
  EFFECTIVE THIS SATURDAY AFTERNOON AND SUNDAY MORNING FROM 550 PM
  UNTIL 100 AM CDT.
 
  TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND
  GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
  AREAS.
 
  THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 95 STATUTE
  MILES EAST AND WEST OF A LINE FROM 15 MILES SOUTH SOUTHWEST OF
  LINCOLN NEBRASKA TO 25 MILES NORTH NORTHEAST OF SPENCER IOWA.
  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 113...WW 114...WW 115...
 
  DISCUSSION...TSTMS EXPECTED TO INCREASE OVER WW AREA THROUGH LATE
  TONIGHT...WITH STRONG SUPERCELLS LIKELY AS CONVERGENCE/ASCENT AND
  WIND FIELD FURTHER STRENGTHEN WITH APPROACH OF UPR AIR IMPULSE IN
  FAST SWLY MID/UPR FLOW.  LOW-LVL HELICITY/UPLIFT SHOULD MAXIMIZE
  NEAR AND ENE OF SFC LOW NOW NEAR KOFK...WITH THE LOW EXPECTED TO
  REMAIN LARGELY STNRY THROUGH WW PERIOD.
 
  AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
  SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
  WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
  550. MEAN STORM MOTION VECTOR 24035.
 
 
  ...CORFIDI

Hazard Tornadoes EF2+ Tornadoes
Likelihood High Low
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
High Moderate


Note:  See the experimental Public Watch (SEL) product with explicit hazard information section below. The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.

  SEL6
 
  URGENT - IMMEDIATE BROADCAST REQUESTED
  TORNADO WATCH NUMBER 116
  NWS STORM PREDICTION CENTER NORMAN OK
  550 PM CDT SAT APR 9 2011
 
  THE NWS STORM PREDICTION CENTER HAS ISSUED A
  TORNADO WATCH FOR PORTIONS OF
 
         WESTERN AND NORTHERN IOWA
         EASTERN NEBRASKA
         SOUTHEAST SOUTH DAKOTA
 
  EFFECTIVE THIS SATURDAY AFTERNOON AND SUNDAY MORNING FROM 550 PM
  UNTIL 100 AM CDT.
 
  SEVERAL TORNADOES
  SCATTERED DAMAGING WINDS
  ISOLATED WIND GUSTS TO 80 MPH POSSIBLE
  WIDESPREAD LARGE HAIL
  ISOLATED HAIL TO 3.0 INCHES IN DIAMETER POSSIBLE
 
  THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 95 STATUTE
  MILES EAST AND WEST OF A LINE FROM 15 MILES SOUTH SOUTHWEST OF
  LINCOLN NEBRASKA TO 25 MILES NORTH NORTHEAST OF SPENCER IOWA.
  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 113...WW 114...WW 115...
 
  DISCUSSION...TSTMS EXPECTED TO INCREASE OVER WW AREA THROUGH LATE
  TONIGHT...WITH STRONG SUPERCELLS LIKELY AS CONVERGENCE/ASCENT AND
  WIND FIELD FURTHER STRENGTHEN WITH APPROACH OF UPR AIR IMPULSE IN
  FAST SWLY MID/UPR FLOW.  LOW-LVL HELICITY/UPLIFT SHOULD MAXIMIZE
  NEAR AND ENE OF SFC LOW NOW NEAR KOFK...WITH THE LOW EXPECTED TO
  REMAIN LARGELY STNRY THROUGH WW PERIOD.
 
  AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
  SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
  WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
  550. MEAN STORM MOTION VECTOR 24035.
 
 
  ...CORFIDI

Hazard Tornadoes EF2+ Tornadoes
Likelihood High Low
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
High Moderate


  SEL6
 
  URGENT - IMMEDIATE BROADCAST REQUESTED
  TORNADO WATCH NUMBER 116
  NWS STORM PREDICTION CENTER NORMAN OK
  550 PM CDT SAT APR 9 2011
 
  THE NWS STORM PREDICTION CENTER HAS ISSUED A
  TORNADO WATCH FOR PORTIONS OF
 
         WESTERN AND NORTHERN IOWA
         EASTERN NEBRASKA
         SOUTHEAST SOUTH DAKOTA
 
  EFFECTIVE THIS SATURDAY AFTERNOON AND SUNDAY MORNING FROM 550 PM
  UNTIL 100 AM CDT.
 
  TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND
  GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
  AREAS.
 
  THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 95 STATUTE
  MILES EAST AND WEST OF A LINE FROM 15 MILES SOUTH SOUTHWEST OF
  LINCOLN NEBRASKA TO 25 MILES NORTH NORTHEAST OF SPENCER IOWA.
  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 113...WW 114...WW 115...
 
  DISCUSSION...TSTMS EXPECTED TO INCREASE OVER WW AREA THROUGH LATE
  TONIGHT...WITH STRONG SUPERCELLS LIKELY AS CONVERGENCE/ASCENT AND
  WIND FIELD FURTHER STRENGTHEN WITH APPROACH OF UPR AIR IMPULSE IN
  FAST SWLY MID/UPR FLOW.  LOW-LVL HELICITY/UPLIFT SHOULD MAXIMIZE
  NEAR AND ENE OF SFC LOW NOW NEAR KOFK...WITH THE LOW EXPECTED TO
  REMAIN LARGELY STNRY THROUGH WW PERIOD.
 
  AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
  SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
  WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
  550. MEAN STORM MOTION VECTOR 24035.
 
 
  ...CORFIDI

Hazard Tornadoes EF2+ Tornadoes
Likelihood High Low
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
High Moderate


Note: Click for Watch Status Reports.

  WOUS64 KWNS 092245
  WOU6
 
  BULLETIN - IMMEDIATE BROADCAST REQUESTED
  TORNADO WATCH OUTLINE UPDATE FOR WT 116
  NWS STORM PREDICTION CENTER NORMAN OK
  550 PM CDT SAT APR 9 2011
 
  TORNADO WATCH 116 IS IN EFFECT UNTIL 100 AM CDT FOR THE
   FOLLOWING LOCATIONS
 
  IAC009-015-021-025-027-029-033-035-041-047-059-063-069-071-073-
  077-079-081-083-085-091-093-109-119-129-133-137-141-143-145-147-
  149-151-155-161-165-167-187-189-193-195-197-100600-
  /O.NEW.KWNS.TO.A.0116.110409T2250Z-110410T0600Z/
 
  IA
  .    IOWA COUNTIES INCLUDED ARE
 
  AUDUBON              BOONE               BUENA VISTA        
  CALHOUN              CARROLL             CASS                
  CERRO GORDO          CHEROKEE            CLAY                
  CRAWFORD             DICKINSON           EMMET              
  FRANKLIN             FREMONT             GREENE              
  GUTHRIE              HAMILTON            HANCOCK            
  HARDIN               HARRISON            HUMBOLDT            
  IDA                  KOSSUTH             LYON                
  MILLS                MONONA              MONTGOMERY          
  O'BRIEN              OSCEOLA             PAGE                
  PALO ALTO            PLYMOUTH            POCAHONTAS          
  POTTAWATTAMIE        SAC                 SHELBY              
  SIOUX                WEBSTER             WINNEBAGO          
  WOODBURY             WORTH               WRIGHT              
 
 
  NEC003-011-021-023-025-027-037-039-043-051-053-055-081-107-109-
  119-121-125-131-139-141-143-153-155-159-167-173-177-179-185-
  100600-
  /O.NEW.KWNS.TO.A.0116.110409T2250Z-110410T0600Z/
 
  NE
  .    NEBRASKA COUNTIES INCLUDED ARE
 
  ANTELOPE             BOONE               BURT                
  BUTLER               CASS                CEDAR              
  COLFAX               CUMING              DAKOTA              
  DIXON                DODGE               DOUGLAS            
  HAMILTON             KNOX                LANCASTER          
  MADISON              MERRICK             NANCE              
  OTOE                 PIERCE              PLATTE              
  POLK                 SARPY               SAUNDERS            
  SEWARD               STANTON             THURSTON            
  WASHINGTON           WAYNE               YORK                
 
 
  SDC027-083-125-127-135-100600-
  /O.NEW.KWNS.TO.A.0116.110409T2250Z-110410T0600Z/
 
  SD
  .    SOUTH DAKOTA COUNTIES INCLUDED ARE
 
  CLAY                 LINCOLN             TURNER              
  UNION                YANKTON            
 
 
  ATTN...WFO...DMX...FSD...GID...OAX...
 
 
 

Hazard Tornadoes EF2+ Tornadoes
Likelihood High Low
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
High Moderate


Note: The Aviation Watch (SAW) product is an approximation to the watch area. The actual watch is depicted by the shaded areas.

  SAW6
  WW 116 TORNADO IA NE SD 092250Z - 100600Z
  AXIS..95 STATUTE MILES EAST AND WEST OF LINE..
  15SSW LNK/LINCOLN NE/ - 25NNE SPW/SPENCER IA/
  ..AVIATION COORDS.. 80NM E/W /41NW PWE - 58S RWF/
  HAIL SURFACE AND ALOFT..3 INCHES. WIND GUSTS..70 KNOTS.
  MAX TOPS TO 550. MEAN STORM MOTION VECTOR 24035.
 
  LAT...LON 40639869 43499684 43499305 40639506
 
  THIS IS AN APPROXIMATION TO THE WATCH AREA.  FOR A
  COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
  FOR WOU6.
 

Watch 116 Status Report Message has not been issued yet.

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Iowa Under the Gun - JAC, 4/9/2011, 6:12 pm
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