Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 586, NWS Norman, OK

August 18, 2015Caddo County, Washita County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Aug 18, 2015, 6:56 PM CDT for Caddo County, Washita County, Oklahoma. It was in force for 36 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
Aug 18, 2015, 6:56 PM CDT (23:56 UTC)
Expired
Aug 18, 2015, 7:32 PM CDT
In force
36 min
Issued by
NWS Norman, OK
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Caddo County, OK, Washita County, OK

The radar

The Altus AFB radar (KFDR), 100 km from the middle of the area, began a volume at 23:59 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 18, 3:06 PM CDTSevere Thunderstorm WatchSPC7 hr

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 Aug 18, 6:23 PM CDT, 33 minutes earlier.

Area forecast discussion, Aug 18, 6:23 PM CDT, 33 minutes before
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Hazardous weather outlook, Aug 18, 3:21 PM CDT, 3 hours 35 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NORMAN OK
321 PM CDT TUE AUG 18 2015

OKZ004>048-050>052-TXZ083>090-192030-
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-
321 PM CDT TUE AUG 18 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 LATE THIS AFTERNOON
AND TONIGHT ACROSS PORTIONS OF WESTERN...CENTRAL...AND NORTHERN
OKLAHOMA.

LOCATION...
THE SLIGHT RISK AREA IS NORTH AND WEST OF A LINE FROM WOODWARD TO
CAMARGO TO KINGFISHER TO STILLWATER.

TIMING...
ALTHOUGH A FEW SEVERE THUNDERSTORMS WILL BE POSSIBLE AFTER 4 PM
THIS AFTERNOON IN NORTHWEST OKLAHOMA...MORE NUMEROUS THUNDERSTORMS
ARE EXPECTED FROM 6 PM UNTIL MIDNIGHT.

IMPACTS...
HAIL UP TO THE SIZE OF GOLF BALLS AND WIND GUSTS UP TO 70 MPH ARE
EXPECTED WITH THE SEVERE STORMS.

DISCUSSION...
A COLD FRONT WILL MOVE INTO NORTHWESTERN OKLAHOMA LATE THIS AFTERNOON.
A FEW SEVERE STORMS MAY DEVELOP ALONG THIS FRONT BEFORE 6 PM...BUT
THE MAIN ACTIVITY WILL HAPPEN LATER TONIGHT AS THE FRONT MOVES THROUGH
THE NORTHERN HALF OF OKLAHOMA. LARGE HAIL AND DAMAGING WINDS WILL BE
THE MAIN THREATS ALTHOUGH LOCALLY HEAVY RAINFALL MAY ALSO RESULT IN
FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...

.THUNDERSTORMS...
SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE ACROSS MUCH OF THE
REGION WEDNESDAY...AND AGAIN THIS WEEKEND. THE HIGHEST CHANCES
FOR THUNDERSTORMS WILL BE DURING THE DAY WEDNESDAY ACROSS
CENTRAL AND SOUTHERN OKLAHOMA. LOCALLY HEAVY RAINFALL AND A FEW
STRONG WIND GUSTS WILL BE POSSIBLE DURING THE DAY WEDNESDAY.

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, Aug 18, 5:39 PM CDT, 1 hour 17 minutes before
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Special weather statement, Aug 18, 5:48 PM CDT, 1 hour 8 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
548 PM CDT TUE AUG 18 2015

OKZ016-182315-
CUSTER OK-
548 PM CDT TUE AUG 18 2015

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN CUSTER COUNTY UNTIL 615
PM CDT...

AT 547 PM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR BUTLER...
MOVING EAST AT 20 MPH.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER...
WIND GUSTS TO 40 MPH...
MINOR FLOODING IN AREAS OF POOR DRAINAGE...

THIS INCLUDES INTERSTATE 40 NEAR MILE MARKER 68.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MONITOR THE WEATHER SITUATION CLOSELY AND BE ALERT FOR THREATENING
WEATHER CONDITIONS.

&&

LAT...LON 3554 9931 3572 9931 3577 9893 3550 9892
TIME...MOT...LOC 2247Z 268DEG 17KT 3563 9923

30
Special weather statement, Aug 18, 6:12 PM CDT, 44 minutes before
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Special weather statement, Aug 18, 6:17 PM CDT, 39 minutes before
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Local storm report, Aug 18, 6:40 PM CDT, 16 minutes before
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Local storm report, Aug 18, 6:53 PM CDT, 3 minutes before
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The office that day

Everything else NWS Norman, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 17, 9:55 PM CDTSpecial Weather StatementOUNHarper35 min
Aug 18, 2:37 AM CDTSpecial Weather StatementOUNWoods38 min
Aug 18, 2:56 AM CDTSpecial Weather StatementOUNAlfalfa, Grant34 min
Aug 18, 5:01 PM CDTSpecial Weather StatementOUNKay29 min
Aug 18, 5:39 PM CDTSpecial Weather StatementOUNKay36 min
Aug 18, 5:48 PM CDTSpecial Weather StatementOUNCuster27 min
Aug 18, 6:03 PM CDTSevere Thunderstorm WarningOUNCuster42 min
Aug 18, 6:12 PM CDTSpecial Weather StatementOUNGarfield33 min
Aug 18, 6:17 PM CDTSpecial Weather StatementOUNKay28 min
Aug 18, 6:20 PM CDTSevere Thunderstorm WarningOUNKay25 min
Aug 18, 6:58 PM CDTAreal Flood AdvisoryOUNKay4 hr

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; radar from the NEXRAD Level II archive.