Alert archive / Arkansas / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 277, NWS Little Rock, AR

July 14, 2017Perry County, Yell County, Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Jul 14, 2017, 1:58 PM CDT for Perry County, Yell 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
Jul 14, 2017, 1:58 PM CDT (18:58 UTC)
Expired
Jul 14, 2017, 2:30 PM CDT
In force
32 min
Issued by
NWS Little Rock, AR
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Perry County, AR, Yell County, AR

The radar

The Little Rock radar (KLZK), 84 km from the middle of the area, began a volume at 18:58 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

Shreveport, LA (KBAD), launched 12:00Z, 7.0 hours before the alert went out and 283 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, Shreveport, LA at 12:00Z on 2017-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1414 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, Shreveport, LA at 12:00Z on 2017-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 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
1414 J/kg
Mixed-layer CIN
-47 J/kg
Mixed-layer LCL
958 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
33 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 13, 7:01 PM CDTSevere Thunderstorm WarningLZKPolk29 min
Jul 13, 7:10 PM CDTSpecial Weather StatementLZKGarland35 min
Jul 14, 10:37 AM CDTSpecial Weather StatementLZKMontgomery23 min
Jul 14, 10:59 AM CDTSpecial Weather StatementLZKMontgomery46 min
Jul 14, 12:23 PM CDTSpecial Weather StatementLZKConway37 min
Jul 14, 12:51 PM CDTSpecial Weather StatementLZKGarland39 min
Jul 14, 1:05 PM CDTSpecial Weather StatementLZKYell25 min
Jul 14, 1:14 PM CDTSpecial Weather StatementLZKConway46 min
Jul 14, 1:44 PM CDTSpecial Weather StatementLZKYell31 min
Jul 14, 2:01 PM CDTSpecial Weather StatementLZKCleburne29 min
Jul 14, 2:22 PM CDTSpecial Weather StatementLZKOuachita38 min
Jul 14, 2:54 PM CDTSevere Thunderstorm WarningLZKCalhoun, Ouachita36 min
Jul 14, 3:13 PM CDTFlash Flood WarningLZKConway, Faulkner, Perry, Pulaski3 hr
Jul 14, 3:35 PM CDTSpecial Weather StatementLZKCalhoun40 min
Jul 14, 3:51 PM CDTSpecial Weather StatementLZKJackson24 min
Jul 14, 4:27 PM CDTSpecial Weather StatementLZKJackson33 min
Jul 14, 5:03 PM CDTSpecial Weather StatementLZKSharp27 min
Jul 14, 6:05 PM CDTSpecial Weather StatementLZKSharp40 min

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.