Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 228, NWS Norman, OK

July 10, 2014Garfield County, Grant County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jul 10, 2014, 5:40 AM CDT for Garfield County, Grant County, Oklahoma. It was in force for 50 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 10, 2014, 5:40 AM CDT (10:40 UTC)
Expired: Jul 10, 2014, 6:30 AM CDT
In force: 50 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Garfield County, OK, Grant County, OK

The radar

The Vance AFB radar (KVNX), 35 km from the middle of the area, began a volume at 10:41 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 00:00Z, 10.7 hours before the alert went out and 229 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: 1069 J/kg
Mixed-layer CIN: -137 J/kg
Mixed-layer LCL: 1536 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 227 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 4.6

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 Jul 9, 6:13 PM CDT, 11 hours 27 minutes earlier.

Area forecast discussion, Jul 9, 6:13 PM CDT, 11 hours 27 minutes before

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Hazardous weather outlook, Jul 9, 11:48 AM CDT, 17 hours 52 minutes before

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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 4:44 AM CDT	Special Weather Statement	OUN	Alfalfa	31 min
Jul 10, 4:54 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Grant	51 min
Jul 10, 5:19 AM CDT	Special Weather Statement	OUN	Kay, Noble	26 min
Jul 10, 5:42 AM CDT	Special Weather Statement	OUN	Noble	33 min
Jul 10, 5:58 AM CDT	Special Weather Statement	OUN	Garfield	32 min
Jul 10, 6:23 AM CDT	Special Weather Statement	OUN	Garfield	37 min
Jul 10, 6:45 AM CDT	Special Weather Statement	OUN	Noble	45 min
Jul 10, 5:13 PM CDT	Special Weather Statement	OUN	Hughes	47 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2014 Every severe thunderstorm warning in 2014

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.