Alert archive / Arkansas / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 63, NWS Little Rock, AR

February 18, 2013Arkansas County, Desha County, Drew County, Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Feb 18, 2013, 7:47 PM CST for Arkansas County, Desha County, Drew County, Arkansas. It was in force for 43 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: Feb 18, 2013, 7:47 PM CST (01:47 UTC)
Expired: Feb 18, 2013, 8:30 PM CST
In force: 43 min
Issued by: NWS Little Rock, AR
Area: Storm-based polygon

Counties Arkansas County, AR, Desha County, AR, Drew County, AR

The radar

The Little Rock radar (KLZK), 128 km from the middle of the area, began a volume at 01:48 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Feb 18, 2:19 PM CST	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 1.8 hours before the alert went out and 172 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: 139 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 903 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 27 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 Feb 18, 5:35 PM CST, 2 hours 12 minutes earlier.

Area forecast discussion, Feb 18, 5:35 PM CST, 2 hours 12 minutes before

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Hazardous weather outlook, Feb 18, 2:55 PM CST, 4 hours 52 minutes before

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In the hours before

Local storm report, Feb 18, 5:28 PM CST, 2 hours 19 minutes before

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Local storm report, Feb 18, 5:29 PM CST, 2 hours 18 minutes before

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Special weather statement, Feb 18, 5:30 PM CST, 2 hours 17 minutes before

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Local storm report, Feb 18, 5:31 PM CST, 2 hours 16 minutes before

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Local storm report, Feb 18, 5:50 PM CST, 1 hour 57 minutes before

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Special weather statement, Feb 18, 5:54 PM CST, 1 hour 53 minutes 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
Feb 18, 6:01 PM CST	Severe Thunderstorm Warning	LZK	Arkansas, Grant, Jefferson, Lonoke, Prairie, Pulaski	44 min
Feb 18, 6:06 PM CST	Severe Thunderstorm Warning	LZK	Monroe, Prairie, White, Woodruff	39 min
Feb 18, 6:14 PM CST	Severe Thunderstorm Warning	LZK	Cleveland, Dallas, Grant, Jefferson	31 min
Feb 18, 6:15 PM CST	Severe Thunderstorm Warning	LZK	Arkansas, Lonoke, Prairie	30 min
Feb 18, 6:36 PM CST	Severe Thunderstorm Warning	LZK	Arkansas, Calhoun, Cleveland, Dallas, Drew, Jefferson and 2 more	39 min
Feb 18, 6:39 PM CST	Severe Thunderstorm Warning	LZK	Arkansas, Jefferson, Monroe, Prairie	51 min
Feb 18, 7:13 PM CST	Severe Thunderstorm Warning	LZK	Arkansas, Cleveland, Desha, Drew, Jefferson, Lincoln	47 min
Feb 18, 7:29 PM CST	Severe Thunderstorm Warning	LZK	Arkansas, Monroe	31 min
Feb 18, 7:29 PM CST	Severe Thunderstorm Warning	LZK	Bradley, Cleveland, Desha, Drew	31 min
Feb 19, 11:22 AM CST	Winter Storm Watch	LZK	Baxter, Cleburne, Conway, Faulkner, Fulton, Independence and 6 more	16 hr

Nearby

Severe Thunderstorm Warnings in Arkansas, 2013 Every severe thunderstorm warning in 2013

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.