Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 101, NWS Norman, OK

May 21, 1987Lincoln County, Logan County, Payne County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 21, 1987, 7:00 PM CDT for Lincoln County, Logan County, Payne County, Oklahoma. It was in force for 45 min. 5 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: May 21, 1987, 7:00 PM CDT (00:00 UTC)
Expired: May 21, 1987, 7:45 PM CDT
In force: 45 min
Issued by: NWS Norman, OK
Area: Whole counties

Counties Lincoln County, OK, Logan County, OK, Payne County, OK

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

Time	Report	Where
May 21, 7:03 PM CDT	Hail 0.75	Logan, OK
May 21, 7:08 PM CDT	Hail 2.75	Logan, OK
May 21, 7:14 PM CDT	Hail 0.75	Logan, OK
May 21, 7:30 PM CDT	Hail 1.25	Logan, OK
May 21, 7:36 PM CDT	Hail 2	Logan, OK

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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.

In the hours before

Special weather statement, May 21, 3:18 PM CDT, 3 hours 42 minutes before

OKLAHOMA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
315 PM CDT THU MAY 21 1987

A MODERATE RISK OF SEVERE THUNDERSTORMS EXISTS OVER PORTIONS OF
NORTHERN AND EASTERN OKLAHOMA THIS AFTERNOON AND TONIGHT. THE MODERATE
RISK AREA COVERS THAT PORTION OF OKLAHOMA NORTH AND EAST OF A PONCA
CITY...OKLAHOMA CITY...FORT SMITH AR LINE. THERE IS A SLIGHT RISK
OF SEVERE THUNDERSTORMS OVER PORTIONS OF SOUTHERN OKLAHOMA. THE SLIGHT
RISK AREA LIES EAST OF AN ALTUS...OKLAHOMA CITY LINE AND WEST OF A
DURANT...FORT SMITH AR LINE...AND BORDERS THE MODERATE RISK AREA TO THE
NORTH.

AT MIDAFTERNOON...A STATIONARY FRONT EXTENDS ALONG A LINE FROM PONCA
CITY TO CHILDRESS TX. A DRY LINE EXTENDS FROM THE FRONT NEAR OKLAHOMA
CITY SOUTHWARD INTO NORTH TEXAS TO THE WEST OF ABILENE. THE LOCATION
WHERE THE FRONT AND DRYLINE INTERSECT IS CALLED A 'TRIPLE POINT' BY
METEOROLOGISTS...AND IS OFTEN A FOCUS FOR SEVERE WEATHER DEVELOPMENT.
LOW LEVEL MOISTURE COVERS THE SOUTHEASTERN TWO-THIRDS OF THE STATE AHEAD
OF THE FRONT AND DRYLINE.

UPPER AIR INFORMATION RECEIVED AROUND 2 PM FROM SOUTH CENTRAL
OKLAHOMA INDICATES THE ATMOSPHERE IS NOT QUITE AS EXPLOSIVELY
UNSTABLE AS IT WAS EARLIER TODAY. HOWEVER...THUNDERSTORM ACTIVITY
IS STARTING TO FIRE UP ALONG THE COLD FRONT TO OUR NORTHEAST IN
MISSOURI...AND TO OUR SOUTH IN TEXAS ALONG THE DRYLINE. SUFFICIENT
INSTABILITY STILL EXISTS OVER OKLAHOMA...AND THUNDERSTORMS ARE
EXPECTED TO DEVELOP ALONG THE COLD FRONT AND/OR DRYLINE BY 4 PM.

THE POTENTIAL REMAINS FOR A SIGNIFICANT OUTBREAK OF SEVERE
WEATHER OVER PORTIONS OF THE STATE THIS AFTERNOON AND TONIGHT.
THE BEST CHANCE FOR SEVERE WEATHER EXISTS NEAR THE TRIPLE POINT...BUT
SEVERE ACTuIVITY CANNOT BE RULED OUT ANYWHERE IN OKLAHOMA NEAR THE FRONT
OR DRYLINE.

CIVIL DEFENSE AND STORM SPOTTER GROUPS IN THE OUTLOOK AREA SHOULD
EXPECT TO BE ACTIVATED BY LATE AFTERNOON.

Special weather statement, May 21, 5:25 PM CDT, 1 hour 35 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
525 PM CDT THU MAY 21 1987

AT 520 PM THE WICHITA FALLS NATIONAL WEATHER RADAR SHOWED A BAND
OF THUNDERSTORMS A FEW PRODUCING VERY HEAVY RAIN DEVELOPING FROM VERNON
TO JUST NORTH OF ABILENE. THE HEAVIEST RAINS WERE FALLING JUST WEST
OF LAKE KEMP AND TO THE SOUTHWEST OF SEYMOUR.

THESE STORMS WERE MOVING TO THE NORTHEAST AT 15 TO 20 MPH.

AT PRESENT NO SEVERE WEATHER WAS INDICATED IN ASSOCIATION WITH THESE
STORMS. HOWEVER THE POTENTIAL FOR SEVERE WEATHER DOES EXIST ACROSS
THE AREA THIS AFTERNOON. THE STORMS COULD POSSIBLY INTENSITY.
RESIDENTS ARE ADVISED TO STAY TUNED TO NOAA WEATHER RADIO OR COMMERCIAL
RADIO AND T.V. FOR LATER STATEMENTS AND POSSIBLE WARNINGS.

Special weather statement, May 21, 5:26 PM CDT, 1 hour 34 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
525 PM CDT THU MAY 21 1987

AT 520 PM THE WICHITA FALLS NATIONAL WEATHER RADAR SHOWED A BAND
OF THUNDERSTORMS A FEW PRODUCING VERY HEAVY RAIN DEVELOPING FROM VERNON
TO JUST NORTH OF ABILENE. THE HEAVIEST RAINS WERE FALLING JUST WEST
OF LAKE KEMP AND TO THE SOUTHWEST OF SEYMOUR.

THESE STORMS WERE MOVING TO THE NORTHEAST AT 15 TO 20 MPH.

AT PRESENT NO SEVERE WEATHER WAS INDICATED IN ASSOCIATION WITH THESE
STORMS. HOWEVER THE POTENTIAL FOR SEVERE WEATHER DOES EXIST ACROSS
THE AREA THIS AFTERNOON. THE STORMS COULD POSSIBLY INTENSIFY.
RESIDENTS ARE ADVISED TO STAY TUNED TO NOAA WEATHER RADIO OR COMMERCIAL
RADIO AND T.V. FOR LATER STATEMENTS AND POSSIBLE WARNINGS.

Special weather statement, May 21, 6:11 PM CDT, 49 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 21, 7:00 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Washita	45 min
May 21, 7:20 PM CDT	Flash Flood Warning	OUN	Logan	3 hr
May 21, 7:23 PM CDT	Severe Thunderstorm Warning	OUN	Oklahoma	22 min
May 21, 7:40 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Logan, Oklahoma	50 min
May 21, 7:40 PM CDT	Severe Thunderstorm Warning	OUN	Washita	50 min
May 21, 8:22 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Logan, Oklahoma	38 min
May 21, 8:22 PM CDT	Severe Thunderstorm Warning	OUN	Grady	38 min
May 21, 8:52 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Oklahoma	53 min
May 21, 9:00 PM CDT	Severe Thunderstorm Warning	OUN	Caddo	45 min
May 21, 9:19 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	41 min
May 21, 10:09 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Oklahoma	51 min
May 21, 10:55 PM CDT	Severe Thunderstorm Warning	OUN	Canadian	35 min
May 21, 11:26 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Oklahoma	34 min
May 21, 11:53 PM CDT	Severe Thunderstorm Warning	OUN	Oklahoma	52 min
May 22, 2:10 AM CDT	Severe Thunderstorm Warning	OUN	Beckham, Custer, Washita	50 min
May 22, 2:25 AM CDT	Severe Thunderstorm Warning	OUN	Kiowa	50 min
May 22, 3:55 AM CDT	Severe Thunderstorm Warning	OUN	Caddo	50 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1987 Every severe thunderstorm warning in 1987

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data.