Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 11, NWS Amarillo, TX

April 9, 1990Beaver County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at Apr 9, 1990, 4:57 PM CDT for Beaver County, Oklahoma. It was in force for 63 min. 1 report 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: Apr 9, 1990, 4:57 PM CDT (21:57 UTC)
Expired: Apr 9, 1990, 6:00 PM CDT
In force: 63 min
Issued by: NWS Amarillo, TX
Area: Whole counties

County Beaver 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	Remark
Apr 9, 5:04 PM CDT	Hail 1.75	Beaver, 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 nearest sounding before it

Dodge City, (KDDC), launched 12:00Z, 10.0 hours before the alert went out and 124 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1469 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 214 m²/s²
0-3 km storm-relative helicity: 248 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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, Apr 9, 2:42 PM CDT, 2 hours 15 minutes before

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Special weather statement, Apr 9, 3:48 PM CDT, 1 hour 9 minutes before

TXZ001>012-COZ015>017-NMZ005-009-013-OKZ001>004-009-014-021-
KSZ003-006- 092145

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE AMARILLO TX
 345 PM CDT MON APR 9  1990

 ...TORNADO WATCH NUMBER 113 CONTINUES IN EFFECT UNTIL 1000 PM
    CDT FOR CHILDRESS AND COLLINGSWORTH COUNTIES OF THE SOUTHEAST
    TEXAS PANDHANDLE...

AT 315 PM CDT HAIL UP TO 1/2 IN IN DIAMETER WAS REPORTED IN GUYMON
OKLAHOMA...BY RADIO STATION KGYN.

AT 330 PM CDT AMARILLO RADAR INDICATED A LARGE THUNDERSTORM WITH VERY
HEAVY RAINFALL AND HAIL JUST NORTHEAST OF GUYMON OKLAHOMA. MOVEMENT
WAS EAST AT 20 MILES AN HOUR.

OTHER LESS INTENSE SHOWERS AND THUNDERSTORMS WAS LOCATED OVER CIMARRON
COUNTY OF THE WEST OKLAHOMA PANHANDLE.

PERSONS IN THE WATCH AREA...AND THOSE IN TEXAS COUNTY OF THE OKLAHOMA
PANHANDLE...SHOULD REMAIN ALERT AND MOVE TO A PLACE OF+ SAFETY IF
THREATENING CONDITIONS ARE SIGHTED.

The office that day

Everything else NWS Amarillo, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 9, 4:05 PM CDT	Severe Thunderstorm Warning	AMA	Beaver	55 min
Apr 9, 5:17 PM CDT	Tornado Warning	AMA	Beaver	43 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1990 Every severe thunderstorm warning in 1990

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; the sounding from the Mesonet's radiosonde archive.