Alert archive / Texas / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 401, NWS Norman, OK

May 13, 2008Baylor County, Texas

NWS Norman, OK issued this severe thunderstorm warning at May 13, 2008, 9:31 PM CDT for Baylor County, Texas. It was in force for 44 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: May 13, 2008, 9:31 PM CDT (02:31 UTC)
Expired: May 13, 2008, 10:15 PM CDT
In force: 44 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

County Baylor County, TX

The radar

The Altus AFB radar (KFDR), 86 km from the middle of the area, began a volume at 02:30 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

Fort Worth, TX (KFWD), launched 00:00Z, 2.5 hours before the alert went out and 199 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: 3961 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 681 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 109 m²/s²
0-3 km storm-relative helicity: -70 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 4.0

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 May 13, 8:02 PM CDT, 1 hour 29 minutes earlier.

Area forecast discussion, May 13, 8:02 PM CDT, 1 hour 29 minutes before

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Hazardous weather outlook, May 13, 8:50 PM CDT, 41 minutes before

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In the hours before

Special weather statement, May 13, 7:21 PM CDT, 2 hours 10 minutes before

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Local storm report, May 13, 7:52 PM CDT, 1 hour 39 minutes before

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Local storm report, May 13, 7:56 PM CDT, 1 hour 35 minutes before

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Special weather statement, May 13, 8:42 PM CDT, 49 minutes before

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Local storm report, May 13, 9:07 PM CDT, 24 minutes before

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Local storm report, May 13, 9:19 PM CDT, 12 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
May 13, 7:24 PM CDT	Severe Thunderstorm Warning	OUN	Pottawatomie, Seminole	35 min
May 13, 7:30 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Pottawatomie	45 min
May 13, 8:11 PM CDT	Severe Thunderstorm Warning	OUN	Hughes	49 min
May 13, 8:49 PM CDT	Severe Thunderstorm Warning	OUN	Hughes, Seminole	41 min
May 13, 9:01 PM CDT	Severe Thunderstorm Warning	OUN	Hughes	29 min
May 13, 9:26 PM CDT	Severe Thunderstorm Warning	OUN	Hughes	35 min
May 13, 7:29 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Clay	46 min
May 14, 12:16 AM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman, Knox	29 min
May 14, 12:44 AM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman	15 min

Nearby

Severe Thunderstorm Warnings in Texas, 2008 Every severe thunderstorm warning in 2008

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.