Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 60, NWS Norman, OK

April 14, 2001Garvin County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Apr 14, 2001, 4:24 AM CDT for Garvin County, Oklahoma. It was in force for 51 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: Apr 14, 2001, 4:24 AM CDT (09:24 UTC)
Expired: Apr 14, 2001, 5:15 AM CDT
In force: 51 min
Issued by: NWS Norman, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Garvin County, OK

The radar

The Norman radar (KTLX), 70 km from the middle of the area, began a volume at 09:23 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, 9.4 hours before the alert went out and 208 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: 482 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 964 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Apr 14, 3:30 AM CDT, 54 minutes earlier.

Area forecast discussion, Apr 14, 3:30 AM CDT, 54 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
Apr 14, 3:38 PM CDT	Severe Thunderstorm Warning	OUN	Greer	52 min
Apr 14, 3:49 PM CDT	Tornado Warning	OUN	Greer	26 min
Apr 14, 3:57 PM CDT	Severe Thunderstorm Warning	OUN	Kiowa	48 min
Apr 14, 4:18 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson	42 min
Apr 14, 4:44 PM CDT	Severe Thunderstorm Warning	OUN	Kiowa	46 min
Apr 14, 4:58 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson, Stephens	47 min
Apr 14, 5:11 PM CDT	Severe Thunderstorm Warning	OUN	Carter	49 min
Apr 14, 5:12 PM CDT	Severe Thunderstorm Warning	OUN	Caddo	48 min
Apr 14, 5:51 PM CDT	Severe Thunderstorm Warning	OUN	Comanche	39 min
Apr 14, 5:59 PM CDT	Severe Thunderstorm Warning	OUN	Carter	31 min
Apr 14, 6:00 PM CDT	Severe Thunderstorm Warning	OUN	Caddo	30 min
Apr 14, 6:09 PM CDT	Severe Thunderstorm Warning	OUN	Johnston, Marshall	51 min
Apr 14, 6:20 PM CDT	Severe Thunderstorm Warning	OUN	Grady	40 min
Apr 14, 6:43 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan	47 min
Apr 14, 6:58 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, McClain	47 min
Apr 14, 3:41 PM CDT	Severe Thunderstorm Warning	OUN	Clay, Wichita	49 min
Apr 14, 5:07 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Wichita	38 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2001 Every severe thunderstorm warning in 2001

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.