Alert archive / Arkansas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 726, NWS Little Rock, AR

July 31, 2011Grant County, Pulaski County, Saline County, Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Jul 31, 2011, 2:54 PM CDT for Grant County, Pulaski County, Saline County, Arkansas. It was in force for 36 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 31, 2011, 2:54 PM CDT (19:54 UTC)
Expired: Jul 31, 2011, 3:30 PM CDT
In force: 36 min
Issued by: NWS Little Rock, AR
Area: Storm-based polygon

Counties Grant County, AR, Pulaski County, AR, Saline County, AR

The radar

The Little Rock radar (KLZK), 35 km from the middle of the area, began a volume at 19:57 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

Springfield, MO (KSGF), launched 12:00Z, 7.9 hours before the alert went out and 286 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: 861 J/kg
Mixed-layer CIN: -120 J/kg
Mixed-layer LCL: 1336 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 135 m²/s²
0-3 km storm-relative helicity: 220 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 3.8

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 Little Rock, AR wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 31, 11:42 AM CDT, 3 hours 12 minutes earlier.

Area forecast discussion, Jul 31, 11:42 AM CDT, 3 hours 12 minutes before

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Hazardous weather outlook, Jul 31, 5:00 AM CDT, 9 hours 54 minutes before

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In the hours before

Special weather statement, Jul 31, 12:43 PM CDT, 2 hours 11 minutes before

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Special weather statement, Jul 31, 1:35 PM CDT, 1 hour 19 minutes before

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Special weather statement, Jul 31, 1:36 PM CDT, 1 hour 18 minutes before

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Special weather statement, Jul 31, 2:02 PM CDT, 52 minutes before

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Special weather statement, Jul 31, 2:39 PM CDT, 15 minutes before

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Special weather statement, Jul 31, 2:53 PM CDT, 1 minute before

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The office that day

Everything else NWS Little Rock, AR issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 30, 7:09 PM CDT	Special Weather Statement	LZK	Stone	31 min
Jul 30, 7:35 PM CDT	Severe Thunderstorm Warning	LZK	Cleburne, Stone, Van Buren	40 min
Jul 30, 8:12 PM CDT	Special Weather Statement	LZK	Sharp	43 min
Jul 31, 11:11 AM CDT	Heat Advisory	LZK	Baxter, Fulton, Izard, Marion, Sharp, Stone	49 hr
Jul 31, 12:36 PM CDT	Special Weather Statement	LZK	Saline	29 min
Jul 31, 12:43 PM CDT	Special Weather Statement	LZK	Polk	32 min
Jul 31, 1:35 PM CDT	Special Weather Statement	LZK	Faulkner	30 min
Jul 31, 1:36 PM CDT	Special Weather Statement	LZK	Conway	29 min
Jul 31, 2:02 PM CDT	Special Weather Statement	LZK	Pope	28 min
Jul 31, 2:39 PM CDT	Special Weather Statement	LZK	Pulaski	31 min
Jul 31, 2:43 PM CDT	Severe Thunderstorm Warning	LZK	Johnson, Newton	32 min
Jul 31, 2:53 PM CDT	Special Weather Statement	LZK	Pope	47 min
Jul 31, 3:04 PM CDT	Severe Thunderstorm Warning	LZK	Pulaski	31 min
Jul 31, 3:14 PM CDT	Special Weather Statement	LZK	Yell	31 min
Jul 31, 3:28 PM CDT	Special Weather Statement	LZK	Newton	47 min
Jul 31, 3:33 PM CDT	Severe Thunderstorm Warning	LZK	Lonoke, Pulaski, Saline	27 min
Jul 31, 3:36 PM CDT	Special Weather Statement	LZK	Pike	44 min
Jul 31, 3:39 PM CDT	Severe Thunderstorm Warning	LZK	Cleveland, Dallas, Grant, Jefferson	51 min
Jul 31, 4:00 PM CDT	Special Weather Statement	LZK	Yell	30 min
Jul 31, 4:05 PM CDT	Severe Thunderstorm Warning	LZK	Logan, Yell	25 min
Jul 31, 4:30 PM CDT	Special Weather Statement	LZK	Grant	30 min
Jul 31, 4:58 PM CDT	Special Weather Statement	LZK	Garland	32 min
Jul 31, 5:18 PM CDT	Special Weather Statement	LZK	Garland	32 min
Jul 31, 6:01 PM CDT	Flash Flood Warning	LZK	Garland, Perry	3 hr

Nearby

Severe Thunderstorm Warnings in Arkansas, 2011 Every severe thunderstorm warning in 2011

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.