Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 734, NWS Norman, OK

July 11, 20194 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jul 11, 2019, 3:05 AM CDT for 4 counties in Oklahoma. It was in force for 25 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 11, 2019, 3:05 AM CDT (08:05 UTC)
Expired: Jul 11, 2019, 3:30 AM CDT
In force: 25 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Beckham County, OK, Custer County, OK, Roger Mills County, OK, Washita County, OK

The radar

The Altus AFB radar (KFDR), 128 km from the middle of the area, began a volume at 08:08 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 8.1 hours before the alert went out and 215 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: 2436 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 1463 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: -134 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.

Issued	Product	Office	Counties	Lasted
Jul 10, 11:20 PM CDT	Special Weather Statement	OUN	Major	25 min
Jul 10, 11:21 PM CDT	Special Weather Statement	OUN	Woodward	24 min
Jul 10, 11:43 PM CDT	Special Weather Statement	OUN	Woodward	32 min
Jul 11, 12:17 AM CDT	Special Weather Statement	OUN	Dewey	28 min
Jul 11, 2:04 AM CDT	Special Weather Statement	OUN	Roger Mills	26 min
Jul 11, 2:29 AM CDT	Special Weather Statement	OUN	Roger Mills	31 min
Jul 11, 2:43 AM CDT	Severe Thunderstorm Warning	OUN	Custer, Roger Mills	47 min
Jul 11, 3:53 AM CDT	Areal Flood Advisory	OUN	Beckham, Custer, Roger Mills, Washita	3 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2019 Every severe thunderstorm warning in 2019

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.