Alert archive / Arkansas / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 334, NWS Little Rock, AR

September 8, 2015Johnson County, Logan County, Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Sep 8, 2015, 3:43 PM CDT for Johnson County, Logan County, Arkansas. It was in force for 32 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 8, 2015, 3:43 PM CDT (20:43 UTC)
Expired
Sep 8, 2015, 4:15 PM CDT
In force
32 min
Issued by
NWS Little Rock, AR
Area
Storm-based polygon
Hail
0.88 in
Wind
60.0 mph

Counties Johnson County, AR, Logan County, AR

The radar

The Western Arkansas radar (KSRX), 71 km from the middle of the area, began a volume at 20:46 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, 8.7 hours before the alert went out and 169 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, Springfield, MO at 12:00Z on 2015-09-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 763 joules per kilogram.LCLLFCEL10008507005003002001001 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, Springfield, MO at 12:00Z on 2015-09-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 78 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
763 J/kg
Mixed-layer CIN
-98 J/kg
Mixed-layer LCL
1220 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
78 m²/s²
0-3 km storm-relative helicity
129 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 8, 2:23 PM CDTSpecial Weather StatementLZKPulaski52 min
Sep 8, 2:42 PM CDTSpecial Weather StatementLZKMarion33 min
Sep 8, 3:24 PM CDTSpecial Weather StatementLZKBaxter51 min
Sep 8, 3:27 PM CDTSpecial Weather StatementLZKPolk48 min
Sep 8, 3:59 PM CDTSevere Thunderstorm WarningLZKLogan, Scott, Yell31 min
Sep 8, 6:32 PM CDTFlash Flood WarningLZKBoone28 min
Sep 8, 6:56 PM CDTFlash Flood WarningLZKBoone2 hr

Nearby

Severe Thunderstorm Warnings in Arkansas, 2015Every severe thunderstorm warning in 2015

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.