Outlook (Main)
Storm Prediction Center
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SPC Severe Thunderstorm Watch 307
WW 307 SEVERE TSTM IA NE 240335Z - 241000Z
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. ...GramsRead more -
SPC Severe Thunderstorm Watch 307 Status Reports
WW 0307 Status UpdatesSTATUS 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
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SPC Severe Thunderstorm Watch 306 Status Reports
WW 0306 Status Updates
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.
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SPC - No MDs are in effect as of Thu Jun 24 04:45:07 UTC 2021
No Mesoscale Discussions are in effect as of Thu Jun 24 04:45:07 UTC 2021. -
SPC Jun 24, 2021 0100 UTC Day 1 Convective Outlook
SPC 0100Z Day 1 Outlook
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
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