Alert archive / Arkansas / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 95, NWS Little Rock, AR

April 21, 2017Izard County, Sharp County, Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Apr 21, 2017, 10:06 PM CDT for Izard County, Sharp County, Arkansas. It was in force for 39 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 21, 2017, 10:06 PM CDT (03:06 UTC)
Expired
Apr 21, 2017, 10:45 PM CDT
In force
39 min
Issued by
NWS Little Rock, AR
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

Counties Izard County, AR, Sharp County, AR

The radar

The Little Rock radar (KLZK), 152 km from the middle of the area, began a volume at 03:08 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 00:00Z, 3.1 hours before the alert went out and 207 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 00:00Z on 2017-04-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 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, Springfield, MO at 00:00Z on 2017-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 205 square meters per square second.19395878Sfc1 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
2 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
472 m above ground
0-6 km bulk shear
76 kt
0-1 km storm-relative helicity
205 m²/s²
0-3 km storm-relative helicity
307 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 severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Local storm report, Apr 21, 10:05 PM CDT, 1 minute before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 21, 9:07 PM CDTSevere Thunderstorm WarningLZKBaxter, Marion, Searcy38 min
Apr 21, 9:36 PM CDTSevere Thunderstorm WarningLZKBaxter, Izard, Stone39 min
Apr 21, 10:07 PM CDTSpecial Weather StatementLZKPolk38 min
Apr 21, 10:30 PM CDTSevere Thunderstorm WarningLZKPolk, Scott45 min
Apr 21, 11:30 PM CDTSpecial Weather StatementLZKLonoke45 min
Apr 21, 11:42 PM CDTSevere Thunderstorm WarningLZKArkansas, Jefferson, Lonoke, Prairie48 min
Apr 21, 11:47 PM CDTSpecial Weather StatementLZKWhite43 min
Apr 21, 11:47 PM CDTSevere Thunderstorm WarningLZKClark, Garland, Hot Spring, Montgomery, Pike32 min
Apr 22, 12:32 AM CDTSpecial Weather StatementLZKMonroe28 min
Apr 22, 12:36 AM CDTSpecial Weather StatementLZKWhite39 min
Apr 22, 12:48 AM CDTSpecial Weather StatementLZKGrant, Hot Spring, Saline42 min
Apr 22, 1:33 AM CDTSpecial Weather StatementLZKGrant, Jefferson42 min
Apr 22, 2:17 AM CDTSpecial Weather StatementLZKArkansas, Cleveland, Jefferson, Lincoln43 min
Apr 22, 2:48 AM CDTSevere Thunderstorm WarningLZKArkansas, Cleveland, Desha, Jefferson, Lincoln42 min
Apr 22, 3:29 AM CDTSpecial Weather StatementLZKDesha46 min
Apr 22, 9:32 AM CDTRiver Flood AdvisoryLZKSearcy24 hr
Apr 22, 10:09 AM CDTRiver Flood WarningLZKRandolph32 days
Apr 22, 10:22 AM CDTRiver Flood WarningLZKWhite, Woodruff60 days

Nearby

Severe Thunderstorm Warnings in Arkansas, 2017Every severe thunderstorm warning in 2017

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.