Alert archive / Arkansas / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 319, NWS Little Rock, AR

August 18, 2014Drew County, Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Aug 18, 2014, 9:31 PM CDT for Drew County, Arkansas. It was in force for 44 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
Aug 18, 2014, 9:31 PM CDT (02:31 UTC)
Expired
Aug 18, 2014, 10:15 PM CDT
In force
44 min
Issued by
NWS Little Rock, AR
Area
Storm-based polygon

County Drew County, AR

The radar

The Little Rock radar (KLZK), 147 km from the middle of the area, began a volume at 02:31 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

Jackson, MS (KJAN), launched 00:00Z, 2.5 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-pSkew-T log-p diagram, Jackson, MS at 00:00Z on 2014-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1842 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 00:00Z on 2014-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1842 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
1134 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
80 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.2

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 7:10 PM CDTSpecial Weather StatementLZKArkansas30 min
Aug 18, 7:31 PM CDTSpecial Weather StatementLZKOuachita59 min
Aug 18, 7:35 PM CDTSpecial Weather StatementLZKJefferson, Lincoln60 min
Aug 18, 7:41 PM CDTSpecial Weather StatementLZKArkansas29 min
Aug 18, 8:11 PM CDTSpecial Weather StatementLZKCleveland29 min
Aug 18, 8:27 PM CDTSevere Thunderstorm WarningLZKCleveland, Dallas, Lincoln33 min
Aug 18, 8:30 PM CDTSpecial Weather StatementLZKDesha45 min
Aug 18, 9:02 PM CDTFlash Flood WarningLZKCleveland, Desha, Drew, Lincoln3 hr
Aug 18, 9:19 PM CDTSpecial Weather StatementLZKDrew46 min
Aug 19, 5:06 PM CDTSpecial Weather StatementLZKIndependence29 min
Aug 19, 5:17 PM CDTSevere Thunderstorm WarningLZKIndependence43 min
Aug 19, 5:53 PM CDTSpecial Weather StatementLZKLogan27 min
Aug 19, 6:23 PM CDTSpecial Weather StatementLZKLogan32 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2014Every severe thunderstorm warning in 2014

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.