Alert archive / Arkansas / Tornado Warnings in 2009

Tornado Warning 18, NWS Little Rock, AR

April 30, 2009Independence County, Jackson County, Arkansas

NWS Little Rock, AR issued this tornado warning at Apr 30, 2009, 4:17 PM CDT for Independence County, Jackson County, Arkansas. It was in force for 28 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 30, 2009, 4:17 PM CDT (21:17 UTC)
Expired: Apr 30, 2009, 4:45 PM CDT
In force: 28 min
Issued by: NWS Little Rock, AR
Area: Storm-based polygon

Counties Independence County, AR, Jackson County, AR

The radar

The Little Rock radar (KLZK), 122 km from the middle of the area, began a volume at 21:17 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

Little Rock, AR (KLZK), launched 12:00Z, 9.3 hours before the alert went out and 161 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: 14 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 507 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: -57 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this tornado 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 tornado warning went out at Apr 30, 3:05 PM CDT, 1 hour 12 minutes earlier.

Area forecast discussion, Apr 30, 3:05 PM CDT, 1 hour 12 minutes before

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Hazardous weather outlook, Apr 30, 5:00 AM CDT, 11 hours 17 minutes before

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In the hours before

Special weather statement, Apr 30, 3:52 PM CDT, 25 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
Apr 29, 7:47 PM CDT	Flash Flood Warning	LZK	Clark, Logan, Montgomery, Pike, Polk, Scott and 1 more	3 hr
Apr 30, 3:59 PM CDT	Severe Thunderstorm Warning	LZK	Independence, Jackson	46 min
Apr 30, 4:50 PM CDT	Severe Thunderstorm Warning	LZK	Cleburne, Jackson, White	25 min
Apr 30, 4:56 PM CDT	Severe Thunderstorm Warning	LZK	Faulkner, Lonoke, Pulaski, White	49 min
Apr 30, 5:22 PM CDT	Severe Thunderstorm Warning	LZK	White, Woodruff	38 min
Apr 30, 5:58 PM CDT	Severe Thunderstorm Warning	LZK	White, Woodruff	47 min
Apr 30, 6:40 PM CDT	Severe Thunderstorm Warning	LZK	Faulkner, Perry, Pulaski	35 min
Apr 30, 6:55 PM CDT	Severe Thunderstorm Warning	LZK	Faulkner, Lonoke, Pulaski, White	50 min

Nearby

Tornado Warnings in Arkansas, 2009 Every tornado warning in 2009 Tornadoes in 2009

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.