Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 392, NWS Norman, OK

June 23, 2011Harper County, Woodward County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 23, 2011, 5:58 PM CDT for Harper County, Woodward County, Oklahoma. It was in force for 62 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: Jun 23, 2011, 5:58 PM CDT (22:58 UTC)
Expired: Jun 23, 2011, 7:00 PM CDT
In force: 62 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

Counties Harper County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 120 km from the middle of the area, began a volume at 22:59 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.

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 Jun 23, 3:20 PM CDT, 2 hours 38 minutes earlier.

Area forecast discussion, Jun 23, 3:20 PM CDT, 2 hours 38 minutes before

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Hazardous weather outlook, Jun 23, 11:50 AM CDT, 6 hours 8 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1150 AM CDT THU JUN 23 2011

OKZ004>048-050>052-TXZ083>090-241000-
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-
1150 AM CDT THU JUN 23 2011

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

THUNDERSTORM OUTLOOK...
ISOLATED SEVERE STORMS ARE POSSIBLE IN NORTHERN AND CENTRAL OKLAHOMA
THIS AFTERNOON AND EVENING.

DISCUSSION...
A WARM FRONT WILL REMAIN DRAPED ACROSS NORTHERN OKLAHOMA THIS
AFTERNOON...ROUGHLY FROM STROUD TO OKEENE TO WOODWARD. MOISTURE AND
WEAK INSTABILITY AT HIGHER LEVELS OF THE ATMOSPHERE WILL MAINTAIN A
FEW THUNDERSTORMS IN NORTHWEST OKLAHOMA EARLY THIS AFTERNOON. THESE
STORMS WILL PRODUCE OCCASIONAL CLOUD TO GROUND LIGHTNING AND WIND
GUSTS APPROACH 40 MPH.

BY LATE AFTERNOON...BROAD SCALE LIFTING WILL REMAIN JUST STRONG
ENOUGH...WHEN COMBINED WITH HOT TEMPERATURES...TO YIELD SOME
STRONGER THUNDERSTORMS. WIDELY SCATTERED STORMS MAY DEVELOP NEAR THE
WARM FRONT...BUT ALSO ALONG THE HIGHER TERRAIN OF FAR WESTERN
OKLAHOMA. WIND SHEAR IS FAVORABLE FOR ORGANIZED STORMS...BUT DRY LOW
LEVEL AIR WILL MINIMIZE INSTABILITY. THE RESULT WILL BE
THUNDERSTORMS WITH VERY HIGH CLOUD BASES...CAPABLE OF PRODUCING
LOCALLY DAMAGING WINDS. MARGINALLY SEVERE HAIL AROUND QUARTER SIZE
IS ALSO POSSIBLE.

DURING THE EVENING...A WARM MID LEVEL CAP WILL EXPAND EAST TOWARD
INTERSTATE 35. THE POTENTIAL FOR NEW THUNDERSTORM DEVELOPMENT WILL
BE CONFINED TO THE EAST OF THE DEVELOPING CAP...MAINLY OVER NORTH
CENTRAL OKLAHOMA. THE THREAT OF SEVERE WEATHER WILL LIKELY END BY
MIDNIGHT.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT FRIDAY JUN 24.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...60 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...30 PERCENT.

OTHER HAZARDOUS WEATHER...
ALTHOUGH SURFACE WINDS WILL NOT BE ESPECIALLY STRONG TODAY...THE
PRESENCE OF HOT AND VERY DRY AIR WILL LEAD TO ELEVATED WILDFIRE
POTENTIAL THIS AFTERNOON.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...

THUNDERSTORM OUTLOOK...
THUNDERSTORM CHANCES WILL GENERALLY REMAIN VERY LOW FROM FRIDAY
THROUGH THE MIDDLE OF NEXT WEEK. THE HIGHEST CHANCE...AROUND 20
PERCENT...IS FORECAST OVER NORTHERN OKLAHOMA MONDAY NIGHT.

OTHER HAZARDOUS WEATHER...
100 DEGREE HEAT WILL PREVAIL EACH AFTERNOON OVER WESTERN NORTH TEXAS
AND MUCH OF WESTERN OKLAHOMA. HIGHS ALSO REACH 100 OR HIGHER OVER A
LARGER PART OF CENTRAL AND EASTERN OKLAHOMA BY MONDAY. SOME AREAS
WILL LIKELY EXPERIENCE AFTERNOON TEMPERATURES OR HEAT INDICES OF 105
TO 110 DEGREES BY NEXT WEEK. THE PERSISTENT AND PROLONGED HEAT MAY
LEAD TO A SIGNIFICANT INCREASE IN THE POTENTIAL FOR HEAT-RELATED
ILLNESSES.

AT THE SAME TIME...THE POTENTIAL FOR WILDFIRES WILL REMAIN VERY
HIGH...ESPECIALLY IN THE WEST.

BURKE

In the hours before

Special weather statement, Jun 23, 5:38 PM CDT, 20 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
538 PM CDT THU JUN 23 2011

OKZ004-009-010-232300-
WOODWARD OK-HARPER OK-ELLIS OK-
538 PM CDT THU JUN 23 2011

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR ELLIS...HARPER AND WOODWARD
COUNTIES.

AT 539 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 4 MILES EAST OF
MAY...MOVING SOUTHEAST AT 30 MPH.

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

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

LAT...LON 3663 9936 3645 9946 3661 9984 3675 9971

WR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 3:29 PM CDT	Fire Weather Watch	OUN	Alfalfa, Beckham, Comanche, Custer, Dewey, Ellis and 11 more	5 hr
Jun 23, 5:38 PM CDT	Special Weather Statement	OUN	Harper	22 min
Jun 23, 6:42 PM CDT	Severe Thunderstorm Warning	OUN	Woodward	63 min
Jun 23, 6:56 PM CDT	Special Weather Statement	OUN	Harper	19 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2011 Every severe thunderstorm warning in 2011

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.