Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 185, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Apr 24, 2015, 6:21 PM CDT for Bryan County, Marshall County, Oklahoma. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 24, 2015, 6:21 PM CDT (23:21 UTC)
- Expired
- Apr 24, 2015, 7:00 PM CDT
- In force
- 39 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 1.25 in
- Wind
- 60.0 mph
Counties Bryan County, OK, Marshall County, OK
The radar
The Norman radar (KTLX), 164 km from the middle of the area, began a volume at 23:24 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Fort Worth, TX (KFWD), launched 12:00Z, 11.4 hours before the alert went out and 148 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1508 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 506 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 145 m²/s²
- 0-3 km storm-relative helicity
- 309 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 4.6
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 24, 6:21 PM CDT, 0 minutes earlier.
Area forecast discussion, Apr 24, 6:21 PM CDT, 0 minutes before
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HAZARDOUS WEATHER OUTLOOK...CORRECTED NATIONAL WEATHER SERVICE NORMAN OK 1148 AM CDT FRI APR 24 2015 OKZ004>048-050>052-TXZ083>090-251700- HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD- NOBLE-ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE- BECKHAM-WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN- CLEVELAND-POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON- TILLMAN-COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON- JEFFERSON-CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN- FOARD-WILBARGER-WICHITA-KNOX-BAYLOR-ARCHER-CLAY- 1148 AM CDT FRI APR 24 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN... WESTERN...CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS. .DAY ONE...TODAY AND TONIGHT... .THUNDERSTORMS... THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS MOST OF OKLAHOMA AND WESTERN NORTH TEXAS. LOCATION... THE SLIGHT RISK EXTENDS ALONG AND EAST OF A LINE FROM WOODWARD...TO ELK CITY...TO ALTUS OKLAHOMA...AND EAST OF A LINE FROM VERNON TO KNOX CITY TEXAS. TIMING... 4 PM TO 11 PM IMPACTS... THE STRONGEST STORMS MAY PRODUCE HAIL UP TO THE SIZE OF HALF DOLLARS AND DAMAGING WINDS OF 60 MPH. THERE WILL ALSO BE A LOW POTENTIAL FOR TORNADOES MAINLY OVER EXTREME NORTH CENTRAL OKLAHOMA AND EXTREME SOUTHERN OKLAHOMA... AND PORTIONS OF WESTERN NORTH TEXAS SOUTH OF WICHITA FALLS. DISCUSSION... SHOWERS AND STORMS CONTINUE ACROSS MUCH OF SOUTHERN OKLAHOMA AND WESTERN NORTH TEXAS LATE THIS MORNING. SOME OF THIS ACTIVITY MAY BECOME STRONG...WITH SMALL HAIL AND GUSTY WINDS. THE SEVERE THREAT WILL DEVELOP LATER THIS AFTERNOON INTO THIS EVENING. .SPOTTER AND EMERGENCY MANAGEMENT STATEMENT... STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE RISK AREA SHOULD PREPARE FOR SEVERE WEATHER OPERATIONS THIS AFTERNOON AND TONIGHT. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY... .THUNDERSTORMS... SEVERE THUNDERSTORMS WILL BE POSSIBLE ONCE AGAIN LATE SUNDAY AFTERNOON THROUGH SUNDAY NIGHT. LARGE HAIL...DAMAGING WINDS... AND HEAVY RAINFALL LOOK TO BE THE PRIMARY THREATS. STORMS ARE LIKELY TO CONTINUE MONDAY AND MONDAY NIGHT ACROSS THE AREA. THE SEVERE THREAT LOOKS TO BE SOMEWHAT LIMITED BY MONDAY. GET GRAPHICS AND MORE DETAILS AT WEATHER.GOV/NORMAN...AND FOLLOW OUR WEATHER FORECAST OFFICE ON TWITTER AND FACEBOOK.
In the hours before
Special weather statement, Apr 24, 2:44 PM CDT, 3 hours 37 minutes before
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</html>The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 1:24 PM CDT | Special Weather Statement | OUN | Greer, Harmon | 36 min |
| Apr 24, 1:36 PM CDT | Severe Thunderstorm Warning | OUN | Beckham, Greer, Harmon, Jackson, Kiowa | 39 min |
| Apr 24, 1:54 PM CDT | Special Weather Statement | OUN | Marshall | 21 min |
| Apr 24, 2:09 PM CDT | Special Weather Statement | OUN | Custer, Washita | 36 min |
| Apr 24, 2:44 PM CDT | Special Weather Statement | OUN | Washita | 31 min |
| Apr 24, 3:15 PM CDT | Special Weather Statement | OUN | Caddo | 30 min |
| Apr 24, 3:49 PM CDT | Special Weather Statement | OUN | Canadian | 26 min |
| Apr 24, 4:11 PM CDT | Special Weather Statement | OUN | Logan | 34 min |
| Apr 24, 5:46 PM CDT | Special Weather Statement | OUN | Love | 29 min |
| Apr 24, 6:55 PM CDT | Severe Thunderstorm Warning | OUN | Bryan | 50 min |
| Apr 24, 4:32 PM CDT | Special Weather Statement | OUN | Clay | 28 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2015Every severe thunderstorm warning in 2015
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.