Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 34, NWS Tulsa, OK

March 22, 1991Sequoyah County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Mar 22, 1991, 12:20 AM CST for Sequoyah County, Oklahoma. It was in force for 55 min.

The area

The counties it named.

The facts

Issued
Mar 22, 1991, 12:20 AM CST (06:20 UTC)
Expired
Mar 22, 1991, 1:15 AM CST
In force
55 min
Issued by
NWS Tulsa, OK
Area
Whole counties

County Sequoyah County, OK

The nearest sounding before it

Springfield, MO (KUMN), launched 00:00Z, 6.3 hours before the alert went out and 178 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-pSkew-T log-p diagram, Springfield, MO at 00:00Z on 1991-03-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1100 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 00:00Z on 1991-03-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 264 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
1100 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
1075 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
264 m²/s²
0-3 km storm-relative helicity
317 m²/s²
Significant tornado parameter
1.9
Supercell composite
6.0

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.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 21, 6:57 PM CSTSevere Thunderstorm WarningTSAHaskell, Muskogee48 min
Mar 21, 7:07 PM CSTTornado WarningTSALeFlore68 min
Mar 21, 7:09 PM CSTTornado WarningTSAHaskell36 min
Mar 21, 7:33 PM CSTSevere Thunderstorm WarningTSALeFlore, Sequoyah57 min
Mar 21, 7:44 PM CSTSevere Thunderstorm WarningTSALeFlore61 min
Mar 21, 8:45 PM CSTSevere Thunderstorm WarningTSALeFlore60 min
Mar 21, 11:36 PM CSTSevere Thunderstorm WarningTSAPittsburg54 min
Mar 22, 1:12 AM CSTSevere Thunderstorm WarningTSALeFlore63 min
Mar 22, 1:28 AM CSTSevere Thunderstorm WarningTSASequoyah32 min
Mar 22, 3:23 AM CSTSevere Thunderstorm WarningTSAPittsburg52 min
Mar 22, 7:35 AM CSTSevere Thunderstorm WarningTSALatimer40 min
Mar 22, 7:57 AM CSTSevere Thunderstorm WarningTSAHaskell48 min
Mar 22, 8:12 AM CSTSevere Thunderstorm WarningTSALeFlore56 min
Mar 21, 6:47 PM CSTSevere Thunderstorm WarningTSAWashington58 min
Mar 21, 8:06 PM CSTSevere Thunderstorm WarningTSAScott, Sebastian69 min
Mar 21, 8:26 PM CSTSevere Thunderstorm WarningTSACrawford64 min
Mar 21, 8:47 PM CSTSevere Thunderstorm WarningTSAFranklin58 min
Mar 21, 9:03 PM CSTSevere Thunderstorm WarningTSALogan, Polk, Scott, Sebastian57 min
Mar 21, 9:25 PM CSTSevere Thunderstorm WarningTSAJohnson65 min
Mar 21, 9:58 PM CSTSevere Thunderstorm WarningTSAJohnson, Logan62 min
Mar 21, 9:58 PM CSTSevere Thunderstorm WarningTSAPolk, Scott62 min
Mar 22, 12:57 AM CSTSevere Thunderstorm WarningTSACrawford, Washington63 min
Mar 22, 8:07 AM CSTSevere Thunderstorm WarningTSAWashington61 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1991Every 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.