Blue Flower

Outlook (Main)

Storm Prediction Center
SPC Forecast Products
  1. WW 307 SEVERE TSTM IA NE 240335Z - 241000Z
    WW 0307 Image
    
    URGENT - IMMEDIATE BROADCAST REQUESTED
    Severe Thunderstorm Watch Number 307
    NWS Storm Prediction Center Norman OK
    1035 PM CDT Wed Jun 23 2021
    
    The NWS Storm Prediction Center has issued a
    
    * Severe Thunderstorm Watch for portions of 
      Far western Iowa
      Central to eastern Nebraska
    
    * Effective this Wednesday night and Thursday morning from 1035
      PM until 500 AM CDT.
    
    * Primary threats include...
      Scattered damaging winds and isolated significant gusts to 90
        mph likely
      Scattered large hail and isolated very large hail events to 2
        inches in diameter possible
    
    SUMMARY...A forward-propagating cluster will likely develop
    east-southeast from ongoing cells across north-central Nebraska,
    spreading into eastern Nebraska and far western Iowa overnight.
    Intense severe wind gusts are possible.
    
    The severe thunderstorm watch area is approximately along and 65
    statute miles north and south of a line from 35 miles northwest of
    Broken Bow NE to 20 miles northeast of Omaha NE. For a complete
    depiction of the watch see the associated watch outline update
    (WOUS64 KWNS WOU7).
    
    PRECAUTIONARY/PREPAREDNESS ACTIONS...
    
    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 306...
    
    AVIATION...A few severe thunderstorms with hail surface and aloft to
    2 inches. Extreme turbulence and surface wind gusts to 80 knots. A
    few cumulonimbi with maximum tops to 600. Mean storm motion vector
    29040.
    
    ...Grams
    
    
    Read more
  2. WW 0307 Status Updates
    WW 0307 Status Image
    
    STATUS REPORT ON WW 307
    
    THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
    
    ..GOSS..06/24/21
    
    ATTN...WFO...OAX...FSD...LBF...GID...
    
    
    STATUS REPORT FOR WS 307 
    
    SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 
    
    IAC071-085-129-133-155-193-240540-
    
    IA 
    .    IOWA COUNTIES INCLUDED ARE
    
    FREMONT              HARRISON            MILLS               
    MONONA               POTTAWATTAMIE       WOODBURY            
    
    
    NEC003-009-011-017-019-021-023-025-027-037-039-041-043-051-053-
    055-071-077-079-081-089-093-107-109-115-119-121-125-131-139-141-
    143-149-153-155-159-163-167-173-175-177-179-183-185-240540-
    
    NE 
    .    NEBRASKA COUNTIES INCLUDED ARE
    
    ANTELOPE             BLAINE              BOONE               
    BROWN                BUFFALO             BURT                
    BUTLER               CASS                CEDAR               
    COLFAX               CUMING              CUSTER              
    DAKOTA               DIXON               DODGE               
    DOUGLAS              GARFIELD            GREELEY             
    HALL                 HAMILTON            HOLT                
    HOWARD               KNOX                LANCASTER           
    LOUP                 MADISON             MERRICK             
    NANCE                OTOE                PIERCE              
    
    Read more
  3. WW 0306 Status Updates
    WW 0306 Status Image
    
    STATUS REPORT ON WW 306
    
    SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 NNE SNY
    TO 35 W MHN TO 35 NW MHN TO 40 W VTN.
    
    ..LYONS..06/24/21
    
    ATTN...WFO...LBF...
    
    
    STATUS REPORT FOR WS 306 
    
    SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 
    
    NEC005-009-015-017-031-041-049-069-071-075-089-091-101-103-111-
    113-115-117-149-171-183-240340-
    
    NE 
    .    NEBRASKA COUNTIES INCLUDED ARE
    
    ARTHUR               BLAINE              BOYD                
    BROWN                CHERRY              CUSTER              
    DEUEL                GARDEN              GARFIELD            
    GRANT                HOLT                HOOKER              
    KEITH                KEYA PAHA           LINCOLN             
    LOGAN                LOUP                MCPHERSON           
    ROCK                 THOMAS              WHEELER             
    
    
    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.
    
    
    Read more
  4. No Mesoscale Discussions are in effect as of Thu Jun 24 04:45:07 UTC 2021.
  5. SPC 0100Z Day 1 Outlook
    Day 1 Outlook Image
    Day 1 Convective Outlook CORR 1
    NWS Storm Prediction Center Norman OK
    0824 PM CDT Wed Jun 23 2021
    
    Valid 240100Z - 241200Z
    
    ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS OVER A PORTION
    OF CENTRAL AND EASTERN NEBRASKA...
    
    ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER A PORTION OF
    THE CENTRAL PLAINS AND UPPER MIDWEST...
    
    CORRECTED FOR MARGINAL RISK GRAPHIC IN SD
    
    ...SUMMARY...
    Severe storms remain possible tonight across parts of the central
    Plains and Upper Midwest. Damaging winds and large hail will be the
    main threats.
    
    ...Central Plains region...
    
    Tendency has been for storms that developed earlier during the late
    afternoon to undergo a temporary weakening trend. The 00Z RAOB data
    from Omaha and North Platte indicate a strong capping inversion
    associated with warm air at the base of an elevated mixed layer.
    This suggests that stronger forcing will be needed to sustain
    organized convection into the overnight hours. A southerly nocturnal
    low-level jet will strengthen to in excess of 45 kt this evening.
    Meanwhile weak perturbations will move through the northern
    periphery of an upper ridge situated over the central Plains. Cold
    pools associated with high based convection currently moving east
    out of western NE will interact with the strengthening low-level
    jet, and this may provide the forcing needed to reinvigorate storms
    during the evening. Given very steep lapse rates and strong
    instability in place, the potential still exists for storms to
    organize into an MCS and produce significant wind gusts.
    
    ..Dial.. 06/24/2021
    
    
    Read more