Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 879, NWS Norman, OK

September 25, 2019Garfield County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Sep 25, 2019, 7:18 PM CDT for Garfield County, Oklahoma. It was in force for 32 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: Sep 25, 2019, 7:18 PM CDT (00:18 UTC)
Expired: Sep 25, 2019, 7:50 PM CDT
In force: 32 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Garfield County, OK

The radar

The Vance AFB radar (KVNX), 51 km from the middle of the area, began a volume at 00:19 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

Norman, OK (KOUN), launched 00:00Z, 0.3 hours before the alert went out and 133 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: 2544 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 1570 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 88 m²/s²
0-3 km storm-relative helicity: 184 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 8.8

Open this sounding in Storm Lab

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.

NWS Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 25, 6:48 PM CDT, 30 minutes earlier.

Area forecast discussion, Sep 25, 6:48 PM CDT, 30 minutes before

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Hazardous weather outlook, Sep 25, 4:59 PM CDT, 2 hours 19 minutes before

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In the hours before

Special weather statement, Sep 25, 6:59 PM CDT, 19 minutes before

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Special weather statement, Sep 25, 7:14 PM CDT, 4 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
Sep 25, 7:14 PM CDT	Special Weather Statement	OUN	Alfalfa	31 min
Sep 25, 7:44 PM CDT	Special Weather Statement	OUN	Alfalfa	31 min
Sep 25, 8:15 PM CDT	Special Weather Statement	OUN	Garfield	30 min
Sep 25, 8:20 PM CDT	Severe Thunderstorm Warning	OUN	Garfield	40 min
Sep 25, 8:32 PM CDT	Special Weather Statement	OUN	Major	28 min
Sep 25, 8:52 PM CDT	Special Weather Statement	OUN	Garfield	23 min
Sep 25, 8:59 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Noble	46 min
Sep 25, 9:44 PM CDT	Special Weather Statement	OUN	Noble	31 min
Sep 25, 10:15 PM CDT	Special Weather Statement	OUN	Kay	30 min
Sep 25, 10:40 PM CDT	Special Weather Statement	OUN	Kay	35 min
Sep 25, 10:49 PM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	19 min
Sep 25, 11:22 PM CDT	Special Weather Statement	OUN	Kay, Noble	23 min
Sep 25, 11:41 PM CDT	Areal Flood Advisory	OUN	Grant, Kay	3 hr
Sep 25, 11:45 PM CDT	Special Weather Statement	OUN	Kay, Noble	30 min
Sep 26, 12:16 AM CDT	Special Weather Statement	OUN	Noble	29 min
Sep 26, 12:30 AM CDT	Areal Flood Advisory	OUN	Noble	3 hr
Sep 26, 12:46 AM CDT	Special Weather Statement	OUN	Noble, Payne	29 min
Sep 26, 1:06 AM CDT	Severe Thunderstorm Warning	OUN	Noble, Payne	24 min
Sep 26, 1:39 AM CDT	Special Weather Statement	OUN	Payne	36 min

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.