Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 908, NWS Norman, OK

July 18, 2025Alfalfa County, Grant County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jul 18, 2025, 3:54 PM CDT for Alfalfa County, Grant County, Oklahoma. It was in force for 21 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
Jul 18, 2025, 3:54 PM CDT (20:54 UTC)
Expired
Jul 18, 2025, 4:15 PM CDT
In force
21 min
Issued by
NWS Norman, OK
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Alfalfa County, OK, Grant County, OK

The radar

The Vance AFB radar (KVNX), 7 km from the middle of the area, began a volume at 20:54 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 nearest sounding before it

Dodge City, (KDDC), launched 12:00Z, 8.9 hours before the alert went out and 198 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, Dodge City, at 12:00Z on 2025-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1967 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, Dodge City, at 12:00Z on 2025-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 114 square meters per square second.1939Sfc1 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
1967 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
551 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
114 m²/s²
0-3 km storm-relative helicity
137 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 10:50 AM CDTRiver Flood WarningOUNGrant, Kay9 hr
Jul 18, 12:58 PM CDTHeat AdvisoryOUNAtoka, Bryan, Coal, Hughes, Johnston, Love and 2 more6 hr
Jul 18, 2:16 PM CDTSpecial Weather StatementOUNMajor29 min
Jul 18, 2:39 PM CDTSpecial Weather StatementOUNMajor36 min
Jul 18, 2:45 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Major, Woods23 min
Jul 18, 2:54 PM CDTSpecial Weather StatementOUNAlfalfa36 min
Jul 18, 3:07 PM CDTSpecial Weather StatementOUNMajor23 min
Jul 18, 3:20 PM CDTSpecial Weather StatementOUNAlfalfa10 min
Jul 18, 3:30 PM CDTSpecial Weather StatementOUNAlfalfa30 min
Jul 18, 3:38 PM CDTSpecial Weather StatementOUNAlfalfa22 min
Jul 18, 3:40 PM CDTSevere Thunderstorm WarningOUNAlfalfa35 min
Jul 18, 4:00 PM CDTSevere Thunderstorm Warning Considerable damage threatOUNAlfalfa15 min
Jul 18, 4:14 PM CDTSpecial Weather StatementOUNGrant16 min
Jul 18, 4:35 PM CDTSpecial Weather StatementOUNGrant25 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2025Every severe thunderstorm warning in 2025

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.