Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 129, NWS Norman, OK

April 30, 2022Seminole County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Apr 30, 2022, 2:00 AM CDT for Seminole County, Oklahoma. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 30, 2022, 2:00 AM CDT (07:00 UTC)
Expired
Apr 30, 2022, 2:30 AM CDT
In force
30 min
Issued by
NWS Norman, OK
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Seminole County, OK

The radar

The Norman radar (KTLX), 63 km from the middle of the area, began a volume at 07:04 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 29, 10:32 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 7.0 hours before the alert went out and 72 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, Norman, OK at 00:00Z on 2022-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2417 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, Norman, OK at 00:00Z on 2022-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 280 square meters per square second.19395878Sfc1 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
2417 J/kg
Mixed-layer CIN
-78 J/kg
Mixed-layer LCL
1086 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
280 m²/s²
0-3 km storm-relative helicity
421 m²/s²
Significant tornado parameter
4.4
Supercell composite
29.4

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 29, 10:13 PM CDTSpecial Weather StatementOUNGrant32 min
Apr 29, 10:22 PM CDTSevere Thunderstorm WarningOUNGrant, Kay38 min
Apr 29, 10:27 PM CDTSpecial Weather StatementOUNGarfield33 min
Apr 29, 10:59 PM CDTSevere Thunderstorm WarningOUNGarfield, Grant, Kay, Noble46 min
Apr 29, 11:01 PM CDTSpecial Weather StatementOUNGarfield29 min
Apr 29, 11:34 PM CDTSpecial Weather StatementOUNNoble41 min
Apr 29, 11:43 PM CDTSevere Thunderstorm WarningOUNGarfield, Kay, Logan, Noble, Payne47 min
Apr 30, 12:23 AM CDTSevere Thunderstorm WarningOUNPayne52 min
Apr 30, 12:46 AM CDTSpecial Weather StatementOUNLincoln44 min
Apr 30, 12:58 AM CDTSevere Thunderstorm WarningOUNLincoln, Payne47 min
Apr 30, 1:20 AM CDTSpecial Weather StatementOUNLincoln25 min
Apr 30, 1:23 AM CDTSevere Thunderstorm WarningOUNLincoln29 min
Apr 30, 1:44 AM CDTSpecial Weather StatementOUNSeminole31 min
Apr 30, 2:33 AM CDTSevere Thunderstorm WarningOUNHughes42 min
Apr 30, 3:15 AM CDTSpecial Weather StatementOUNHughes30 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2022Every severe thunderstorm warning in 2022

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; radar from the NEXRAD Level II archive.