Alert archive / Arkansas / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 281, NWS Little Rock, AR

July 18, 2018Independence County, Jackson County, Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Jul 18, 2018, 2:41 PM CDT for Independence County, Jackson County, Arkansas. It was in force for 34 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
Jul 18, 2018, 2:41 PM CDT (19:41 UTC)
Expired
Jul 18, 2018, 3:15 PM CDT
In force
34 min
Issued by
NWS Little Rock, AR
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

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 19:42 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, 7.7 hours before the alert went out and 255 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 2018-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 798 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 2018-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 112 square meters per square second.193958Sfc1 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
798 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
861 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
112 m²/s²
0-3 km storm-relative helicity
219 m²/s²
Significant tornado parameter
0.5
Supercell composite
4.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 17, 7:10 PM CDTFlash Flood WarningLZKFaulkner, Perry, Pulaski, Saline2 hr
Jul 17, 8:18 PM CDTFlash Flood WarningLZKFaulkner, Lonoke, Pulaski, White94 min
Jul 18, 9:52 AM CDTFlash Flood WarningLZKFulton, Sharp3 hr
Jul 18, 12:17 PM CDTSpecial Weather StatementLZKSharp43 min
Jul 18, 12:41 PM CDTSpecial Weather StatementLZKDrew49 min
Jul 18, 1:05 PM CDTSpecial Weather StatementLZKDesha40 min
Jul 18, 1:09 PM CDTSpecial Weather StatementLZKSharp51 min
Jul 18, 1:29 PM CDTSpecial Weather StatementLZKIzard46 min
Jul 18, 1:47 PM CDTFlash Flood WarningLZKIndependence, Izard, Sharp118 min
Jul 18, 2:43 PM CDTHeat AdvisoryLZKArkansas, Bradley, Calhoun, Clark, Cleveland, Conway and 20 more30 hr
Jul 18, 2:43 PM CDTHeat AdvisoryLZKArkansas, Bradley, Calhoun, Clark, Cleveland, Conway and 20 more37 hr
Jul 18, 3:05 PM CDTSevere Thunderstorm WarningLZKIndependence, Jackson27 min
Jul 18, 3:31 PM CDTSpecial Weather StatementLZKJackson44 min
Jul 18, 3:55 PM CDTSpecial Weather StatementLZKIzard50 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2018Every severe thunderstorm warning in 2018

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.