Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 178, NWS Norman, OK

April 22, 20154 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Apr 22, 2015, 5:09 AM CDT for 4 counties in Oklahoma. It was in force for 51 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 22, 2015, 5:09 AM CDT (10:09 UTC)
Expired: Apr 22, 2015, 6:00 AM CDT
In force: 51 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Beckham County, OK, Custer County, OK, Kiowa County, OK, Washita County, OK

The radar

The Altus AFB radar (KFDR), 103 km from the middle of the area, began a volume at 10:09 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.

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 22, 2:42 AM CDT, 2 hours 27 minutes earlier.

Area forecast discussion, Apr 22, 2:42 AM CDT, 2 hours 27 minutes before

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Hazardous weather outlook, Apr 22, 4:03 AM CDT, 1 hour 6 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
403 AM CDT WED APR 22 2015

OKZ004>048-050>052-TXZ083>090-230915-
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-
403 AM CDT WED APR 22 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...
SOME STRONG TO SEVERE STORMS WILL BE POSSIBLE THROUGH MID-MORNING
ACROSS PARTS OF NORTHERN... CENTRAL... AND WESTERN OKLAHOMA. THERE
IS THEN AN ENHANCED AND SLIGHT RISK FOR SEVERE STORMS LATER THIS
AFTERNOON AND THIS EVENING ACROSS SOUTHERN OKLAHOMA AND WESTERN
NORTH TEXAS.

LOCATION...
THE MOST LIKELY AREA FOR SEVERE STORMS THIS MORNING WILL BE
NEAR A LINE FROM CHEYENNE... TO WEATHERFORD AND NORMAN... TO
SEMINOLE.

THE ENHANCED RISK IS SOUTH OF A LINE FROM HOLLIS AND ALTUS... TO
FREDERICK AND WAURIKA... TO DURANT OKLAHOMA. THIS INCLUDES ALL OF
WESTERN NORTH TEXAS. THE SLIGHT RISK IS SOUTH OF A LINE FROM ELK
CITY AND CHICKASHA... TO ADA OKLAHOMA.

TIMING...
MORNING SEVERE STORMS WILL BE POSSIBLE THROUGH 9 AM. THE MOST
LIKELY TIME FOR THE AFTERNOON AND EVENING STORMS WILL BE FROM 4
PM TO 1 AM.

IMPACTS...
HAIL UP TO THE SIZE OF PING PONG BALLS AND WIND GUSTS TO 60 MPH
WILL BE POSSIBLE WITH THE MORNING ACTIVITY.

HAIL UP TO THE SIZE OF TENNIS BALLS AND WIND GUSTS UP TO 70 MPH
WILL BE THE MAIN CONCERNS LATER TODAY. THERE IS A LOW POTENTIAL
FOR A FEW TORNADOES ACROSS THE ENHANCED RISK AREA LATE THIS
AFTERNOON THROUGH MID-EVENING.

DISCUSSION...
ELEVATED SHOWERS AND THUNDERSTORMS WILL MOVE ACROSS THE AREA THIS
MORNING. SOME OF THE STORMS THIS MORNING COULD BECOME STRONG TO
SEVERE MAINLY PRODUCING LARGE HAIL ALTHOUGH A SEVERE WIND GUST OR
TWO IS NOT OUT OF THE QUESTION. THE SEVERE POTENTIAL WITH THIS
ACTIVITY WILL END AROUND MID-MORNING THIS MORNING.

ADDITIONAL THUNDERSTORMS WILL BE POSSIBLE LATER THIS AFTERNOON AND
TONIGHT. A BOUNDARY WILL MOVE SOUTH ACROSS THE AREA TODAY AND IS
EXPECTED TO BE IN SOUTHERN PARTS OF THE AREA THIS AFTERNOON.
MOISTURE AND INSTABILITY WILL INCREASE SOUTH OF THE BOUNDARY.
THUNDERSTORMS WILL LIKELY DEVELOP NEAR AND SOUTH OF THE BOUNDARY
LATE THIS AFTERNOON AND EVENING. INITIALLY THESE STORMS WILL
LIKELY BE DISCRETE BUT ARE EXPECTED TO DEVELOP INTO ONE OR MORE
STORM COMPLEXES THIS EVENING THAT WILL MOVE ACROSS THE AREA. LARGE
HAIL AND STRONG WINDS WILL BE THE MAIN CONCERNS INITIALLY BUT A
FEW TORNADOES COULD ALSO BE POSSIBLE. THE POTENTIAL FOR LARGE HAIL
AND TORNADOES WILL DIMINISH AND THE RISK OF DAMAGING WIND GUSTS
WILL INCREASE WHEN THE STORMS BECOME A COMPLEX. THE SEVERE
POTENTIAL WILL DECREASE OVERNIGHT ALTHOUGH STORMS COULD REMAIN
POSSIBLE THROUGHOUT THE NIGHT.

.SPOTTER AND EMERGENCY MANAGEMENT STATEMENT...

STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE
RISK AREAS SHOULD PREPARE FOR SEVERE WEATHER OPERATIONS LATE THIS
AFTERNOON AND EVENING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...

.THUNDERSTORMS...
STRONG TO SEVERE STORMS WILL REMAIN POSSIBLE THROUGH FRIDAY.

THERE IS A SLIGHT AND MARGINAL RISK OF SEVERE STORMS ACROSS
PORTIONS OF CENTRAL AND SOUTHERN OKLAHOMA... AND WESTERN NORTH
TEXAS. WHAT HAPPENS THURSDAY WILL BE DEPENDENT ON WHAT OCCURS
TODAY AND TONIGHT... BUT ISOLATED TO SCATTERED SEVERE STORMS COULD
DEVELOP LATE THURSDAY AFTERNOON INTO THE EVENING. IF THESE STORMS
DEVELOP... LARGE HAIL AND STRONG WINDS WILL BE THE MAIN CONCERNS.

ON FRIDAY... THERE IS A MARGINAL AND SLIGHT RISK FOR MUCH OF
OKLAHOMA AND WESTERN NORTH TEXAS... EXCEPT FOR FAR WESTERN
PORTIONS OF THESE AREAS. A DRYLINE IS EXPECTED TO MOVE EAST
FRIDAY WITH SEVERE STORMS POSSIBLE ALONG AND EAST OF THIS
BOUNDARY. THE POSSIBLE RISK AREA WILL DEPEND ON HOW FAR EAST THIS
DRYLINE MOVES WHICH IS UNCERTAIN AT THIS TIME. THUNDERSTORMS COULD
BEGIN DEVELOPING AS EARLY AS MID-AFTERNOON ON FRIDAY DEPENDING ON
THE TIMING OF THE STORM SYSTEM. LARGE HAIL AND STRONG WINDS WILL
BE THE MAIN CONCERNS ALTHOUGH SOME TORNADOES MAY ALSO BE POSSIBLE.

THE SEVERE RISK OVER THE NEXT FEW DAYS WILL CONTINUE TO DEPEND ON
WHAT HAPPENS THE PREVIOUS AFTERNOON AND NIGHT SO CONTINUE TO
CHECK THE FORECAST FOR THE LATEST INFORMATION.

SATURDAY WILL BE DRY BUT THUNDERSTORM CHANCES WILL RETURN SUNDAY
AND CONTINUE INTO MONDAY. STRONG TO SEVERE STORMS MAY BE POSSIBLE
THESE DAYS AS WELL.

.FIRE WEATHER...
ELEVATED WILDFIRE SPREAD POTENTIAL WILL ALSO LIKELY OCCUR FRIDAY
AFTERNOON AND EARLY EVENING WEST OF THE DRYLINE... ESPECIALLY IN
PARTS OF WESTERN OKLAHOMA AND WESTERN NORTH TEXAS. LOW
HUMIDITIES... VERY WARM TEMPERATURES... AND GUSTY WINDS ARE
EXPECTED.

GET GRAPHICS AND MORE DETAILS AT WEATHER.GOV/NORMAN...AND FOLLOW
OUR WEATHER FORECAST OFFICE ON TWITTER AND FACEBOOK.

EM/MBS

In the hours before

Special weather statement, Apr 22, 3:30 AM CDT, 1 hour 39 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
330 AM CDT WED APR 22 2015

OKZ009-014-220900-
ROGER MILLS OK-ELLIS OK-
330 AM CDT WED APR 22 2015

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN ROGER MILLS AND
SOUTHWESTERN ELLIS COUNTIES UNTIL 400 AM CDT...

AT 328 AM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR LAKE MARVIN...
MOVING EAST AT 30 MPH.

HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...
WIND GUSTS TO 50 MPH...

LOCATIONS IMPACTED INCLUDE...
ARNETT...ROLL...CRAWFORD AND DURHAM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3608 10000 3616 9967 3569 9964 3573 10000
TIME...MOT...LOC 0828Z 264DEG 25KT 3589 10014

MAHALE

Special weather statement, Apr 22, 4:55 AM CDT, 14 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
455 AM CDT WED APR 22 2015

OKZ016-021-022-034-221030-
GREER OK-CUSTER OK-BECKHAM OK-WASHITA OK-
455 AM CDT WED APR 22 2015

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN GREER...SOUTHWESTERN
CUSTER...EASTERN BECKHAM AND NORTHWESTERN WASHITA COUNTIES UNTIL 530
AM CDT...

AT 453 AM CDT...A STRONG THUNDERSTORM WAS LOCATED 7 MILES SOUTHWEST
OF ELK CITY...MOVING SOUTHEAST AT 30 MPH.

HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...
WIND GUSTS TO 50 MPH...

LOCATIONS IMPACTED INCLUDE...
ELK CITY...SAYRE...BURNS FLAT...CANUTE AND CARTER.

LAT...LON 3536 9967 3547 9948 3549 9936 3543 9908
      3511 9948
TIME...MOT...LOC 0953Z 326DEG 26KT 3536 9953

MAHALE

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 22, 3:30 AM CDT	Special Weather Statement	OUN	Roger Mills	30 min
Apr 22, 3:56 AM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey, Ellis, Roger Mills	49 min
Apr 22, 4:39 AM CDT	Severe Thunderstorm Warning	OUN	Custer, Roger Mills, Washita	51 min
Apr 22, 4:55 AM CDT	Special Weather Statement	OUN	Beckham	35 min
Apr 22, 5:43 AM CDT	Special Weather Statement	OUN	Canadian	32 min
Apr 22, 5:50 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Kiowa, Washita	40 min
Apr 22, 6:25 AM CDT	Special Weather Statement	OUN	Ellis	35 min
Apr 22, 6:28 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Grady, Kiowa, Washita	47 min
Apr 22, 7:08 AM CDT	Special Weather Statement	OUN	Cleveland, Pottawatomie	37 min
Apr 22, 7:13 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Cotton, Garvin, Grady, Stephens	47 min
Apr 22, 7:17 AM CDT	Special Weather Statement	OUN	Comanche	28 min
Apr 22, 7:39 AM CDT	Special Weather Statement	OUN	Caddo	36 min
Apr 22, 7:57 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Jefferson, Murray, Stephens	48 min
Apr 22, 8:27 AM CDT	Special Weather Statement	OUN	Washita	33 min
Apr 22, 8:48 AM CDT	Special Weather Statement	OUN	Caddo, Grady	27 min
Apr 22, 8:49 AM CDT	Special Weather Statement	OUN	Marshall	26 min
Apr 22, 9:16 AM CDT	Special Weather Statement	OUN	Marshall	29 min
Apr 22, 9:21 AM CDT	Special Weather Statement	OUN	Grady	24 min
Apr 22, 9:49 AM CDT	Special Weather Statement	OUN	Bryan	41 min
Apr 22, 9:52 AM CDT	Special Weather Statement	OUN	Garvin	23 min
Apr 22, 10:15 AM CDT	Special Weather Statement	OUN	Garvin, Stephens	30 min
Apr 22, 6:29 PM CDT	Special Weather Statement	OUN	Archer	46 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2015 Every 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.