Alert archive / Arkansas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 457, NWS Little Rock, AR

September 26, 2012Newton County, Searcy County, Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Sep 26, 2012, 2:17 PM CDT for Newton County, Searcy County, Arkansas. It was in force for 27 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: Sep 26, 2012, 2:17 PM CDT (19:17 UTC)
Expired: Sep 26, 2012, 2:44 PM CDT
In force: 27 min
Issued by: NWS Little Rock, AR
Area: Storm-based polygon

Counties Newton County, AR, Searcy County, AR

The radar

The Little Rock radar (KLZK), 136 km from the middle of the area, began a volume at 19:20 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, 7.3 hours before the alert went out and 133 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: 66 J/kg
Mixed-layer CIN: -148 J/kg
Mixed-layer LCL: 856 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 35 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

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 Sep 26, 12:16 PM CDT, 2 hours 1 minute earlier.

Area forecast discussion, Sep 26, 12:16 PM CDT, 2 hours 1 minute before

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Hazardous weather outlook, Sep 26, 1:35 PM CDT, 42 minutes before

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In the hours before

Special weather statement, Sep 26, 1:57 PM CDT, 20 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
Sep 26, 1:57 PM CDT	Special Weather Statement	LZK	Newton	18 min
Sep 26, 3:25 PM CDT	Special Weather Statement	LZK	Searcy	45 min
Sep 26, 3:26 PM CDT	Special Weather Statement	LZK	Sharp	29 min
Sep 26, 4:08 PM CDT	Special Weather Statement	LZK	Sharp	32 min
Sep 26, 4:28 PM CDT	Special Weather Statement	LZK	Sharp	32 min
Sep 26, 4:46 PM CDT	Special Weather Statement	LZK	Sharp	29 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2012 Every severe thunderstorm warning in 2012

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.