Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 49, NWS Norman, OK

March 21, 1991Coal County, Hughes County, Pontotoc County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Mar 21, 1991, 11:01 PM CST for Coal County, Hughes County, Pontotoc County, Oklahoma. It was in force for 59 min.

The area

The counties it named.

The facts

Issued: Mar 21, 1991, 11:01 PM CST (05:01 UTC)
Expired: Mar 22, 1991, 12:00 AM CST
In force: 59 min
Issued by: NWS Norman, OK
Area: Whole counties

Counties Coal County, OK, Hughes County, OK, Pontotoc County, OK

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 5.0 hours before the alert went out and 102 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: 2 J/kg
Mixed-layer CIN: -155 J/kg
Mixed-layer LCL: 1767 m above ground
0-6 km bulk shear: 88 kt
0-1 km storm-relative helicity: -66 m²/s²
0-3 km storm-relative helicity: 27 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.1

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, Mar 21, 8:03 PM CST, 2 hours 58 minutes before

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Special weather statement, Mar 21, 8:32 PM CST, 2 hours 29 minutes before

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Local storm report, Mar 21, 10:02 PM CST, 59 minutes before

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Special weather statement, Mar 21, 10:02 PM CST, 59 minutes before

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Local storm report, Mar 21, 10:22 PM CST, 39 minutes before

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Local storm report, Mar 21, 10:23 PM CST, 38 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
Mar 21, 6:00 PM CST	Tornado Warning	OUN	Bryan	45 min
Mar 21, 6:03 PM CST	Severe Thunderstorm Warning	OUN	Jefferson, Love	42 min
Mar 21, 6:15 PM CST	Tornado Warning	OUN	Pushmataha	45 min
Mar 21, 6:19 PM CST	Severe Thunderstorm Warning	OUN	Carter, Johnston, Love, Marshall	56 min
Mar 21, 6:41 PM CST	Tornado Warning	OUN	Atoka, Bryan	49 min
Mar 21, 6:58 PM CST	Severe Thunderstorm Warning	OUN	Pushmataha	62 min
Mar 21, 7:07 PM CST	Severe Thunderstorm Warning	OUN	Bryan	68 min
Mar 21, 7:10 PM CST	Tornado Warning	OUN	Bryan	35 min
Mar 21, 7:15 PM CST	Severe Thunderstorm Warning	OUN	Johnston, Marshall	60 min
Mar 21, 7:15 PM CST	Severe Thunderstorm Warning	OUN	Love	60 min
Mar 21, 7:39 PM CST	Tornado Warning	OUN	Marshall	36 min
Mar 21, 7:52 PM CST	Tornado Warning	OUN	Bryan	23 min
Mar 21, 8:05 PM CST	Severe Thunderstorm Warning	OUN	Atoka, Pushmataha	55 min
Mar 21, 8:11 PM CST	Severe Thunderstorm Warning	OUN	Choctaw	64 min
Mar 21, 8:41 PM CST	Severe Thunderstorm Warning	OUN	Jefferson	64 min
Mar 21, 9:25 PM CST	Severe Thunderstorm Warning	OUN	Carter	65 min
Mar 21, 9:58 PM CST	Severe Thunderstorm Warning	OUN	Love	47 min
Mar 21, 10:30 PM CST	Severe Thunderstorm Warning	OUN	Carter, Johnston, Marshall	45 min
Mar 21, 11:40 PM CST	Severe Thunderstorm Warning	OUN	Atoka, Bryan, Johnston	65 min
Mar 22, 1:37 AM CST	Severe Thunderstorm Warning	OUN	Jefferson, Love	53 min
Mar 22, 1:44 AM CST	Severe Thunderstorm Warning	OUN	Marshall	61 min
Mar 22, 1:49 AM CST	Tornado Warning	OUN	Marshall	26 min
Mar 22, 2:16 AM CST	Severe Thunderstorm Warning	OUN	Atoka, Bryan, Johnston	59 min
Mar 22, 3:15 AM CST	Severe Thunderstorm Warning	OUN	Atoka	45 min
Mar 22, 6:51 AM CST	Severe Thunderstorm Warning	OUN	Choctaw, Pushmataha	69 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1991 Every severe thunderstorm warning in 1991

Sources

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