Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 340, NWS Norman, OK

June 21, 1990Beckham County, Roger Mills County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 21, 1990, 6:49 PM CDT for Beckham County, Roger Mills County, Oklahoma. It was in force for 41 min. 2 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: Jun 21, 1990, 6:49 PM CDT (23:49 UTC)
Expired: Jun 21, 1990, 7:30 PM CDT
In force: 41 min
Issued by: NWS Norman, OK
Area: Whole counties

Counties Beckham County, OK, Roger Mills 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
Jun 21, 7:00 PM CDT	Thunderstorm Wind 56	Beckham, OK
Jun 21, 7:10 PM CDT	Thunderstorm Wind 52	Roger Mills, 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

Amarillo Airport, TX (KAMA), launched 12:00Z, 11.8 hours before the alert went out and 184 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: 758 J/kg
Mixed-layer CIN: -228 J/kg
Mixed-layer LCL: 1580 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 208 m²/s²
0-3 km storm-relative helicity: 252 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

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

Local storm report, Jun 21, 3:25 PM CDT, 3 hours 24 minutes before

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Local storm report, Jun 21, 3:33 PM CDT, 3 hours 16 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 1:48 AM CDT	Severe Thunderstorm Warning	OUN	Blaine	42 min
Jun 21, 2:13 AM CDT	Severe Thunderstorm Warning	OUN	Canadian	62 min
Jun 21, 3:04 PM CDT	Severe Thunderstorm Warning	OUN	Kay	41 min
Jun 21, 3:53 PM CDT	Severe Thunderstorm Warning	OUN	Noble	52 min
Jun 21, 4:30 PM CDT	Severe Thunderstorm Warning	OUN	Woods	45 min
Jun 21, 5:22 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Grant	53 min
Jun 21, 5:45 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Roger Mills	45 min
Jun 21, 6:12 PM CDT	Severe Thunderstorm Warning	OUN	Grant	33 min
Jun 21, 6:33 PM CDT	Severe Thunderstorm Warning	OUN	Garfield	42 min
Jun 21, 6:38 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Kingfisher	52 min
Jun 21, 6:52 PM CDT	Severe Thunderstorm Warning	OUN	Kay	53 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.