Alert archive / Arkansas / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 347, NWS Little Rock, AR

August 17, 20184 counties in Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Aug 17, 2018, 1:36 PM CDT for 4 counties in 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
Aug 17, 2018, 1:36 PM CDT (18:36 UTC)
Expired
Aug 17, 2018, 2:15 PM CDT
In force
39 min
Issued by
NWS Little Rock, AR
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Arkansas County, AR, Cleveland County, AR, Jefferson County, AR, Lincoln County, AR

The radar

The Little Rock radar (KLZK), 92 km from the middle of the area, began a volume at 18:35 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 12:00Z, 6.6 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, Jackson, MS at 12:00Z on 2018-08-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1646 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, Jackson, MS at 12:00Z on 2018-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 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
1646 J/kg
Mixed-layer CIN
-32 J/kg
Mixed-layer LCL
698 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
41 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.

NWS Little Rock, AR wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 17, 12:34 PM CDT, 1 hour 2 minutes earlier.

Area forecast discussion, Aug 17, 12:34 PM CDT, 1 hour 2 minutes before
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Hazardous weather outlook, Aug 17, 4:28 AM CDT, 9 hours 8 minutes before
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In the hours before

Local storm report, Aug 17, 8:55 AM CDT, 4 hours 41 minutes before
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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
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Special weather statement, Aug 17, 1:02 PM CDT, 34 minutes before
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  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 16, 7:08 PM CDTSpecial Weather StatementLZKLogan37 min
Aug 16, 7:17 PM CDTSevere Thunderstorm WarningLZKJohnson, Logan43 min
Aug 16, 8:00 PM CDTSevere Thunderstorm WarningLZKJohnson, Pope20 min
Aug 16, 8:38 PM CDTSpecial Weather StatementLZKMarion52 min
Aug 16, 10:04 PM CDTSpecial Weather StatementLZKPope41 min
Aug 16, 10:09 PM CDTSpecial Weather StatementLZKFulton51 min
Aug 16, 10:21 PM CDTFlash Flood WarningLZKBaxter, Fulton, Izard3 hr
Aug 16, 10:40 PM CDTSpecial Weather StatementLZKSearcy50 min
Aug 16, 10:43 PM CDTSpecial Weather StatementLZKPope47 min
Aug 16, 10:58 PM CDTSpecial Weather StatementLZKMarion47 min
Aug 16, 10:59 PM CDTSpecial Weather StatementLZKConway31 min
Aug 16, 11:02 PM CDTSpecial Weather StatementLZKSharp43 min
Aug 16, 11:19 PM CDTSpecial Weather StatementLZKCleburne41 min
Aug 16, 11:24 PM CDTSpecial Weather StatementLZKIndependence51 min
Aug 16, 11:31 PM CDTFlash Flood WarningLZKFulton, Sharp3 hr
Aug 16, 11:34 PM CDTSpecial Weather StatementLZKIzard26 min
Aug 16, 11:37 PM CDTSpecial Weather StatementLZKStone23 min
Aug 17, 1:08 AM CDTSpecial Weather StatementLZKJackson22 min
Aug 17, 1:31 AM CDTSpecial Weather StatementLZKPope44 min
Aug 17, 2:21 AM CDTSpecial Weather StatementLZKPope24 min
Aug 17, 4:25 AM CDTSpecial Weather StatementLZKLonoke35 min
Aug 17, 4:27 AM CDTSpecial Weather StatementLZKVan Buren18 min
Aug 17, 5:00 AM CDTSpecial Weather StatementLZKConway30 min
Aug 17, 5:03 AM CDTSpecial Weather StatementLZKArkansas42 min
Aug 17, 5:55 AM CDTSpecial Weather StatementLZKFaulkner20 min
Aug 17, 6:17 AM CDTSpecial Weather StatementLZKFaulkner43 min
Aug 17, 7:17 AM CDTSpecial Weather StatementLZKFaulkner43 min
Aug 17, 8:10 AM CDTAreal Flood WarningLZKConway, Faulkner, Van Buren3 hr
Aug 17, 8:30 AM CDTFlash Flood WarningLZKFaulkner, Van Buren3 hr
Aug 17, 1:02 PM CDTSpecial Weather StatementLZKJefferson43 min
Aug 17, 1:56 PM CDTSpecial Weather StatementLZKDallas34 min
Aug 17, 2:07 PM CDTSpecial Weather StatementLZKPolk23 min
Aug 17, 2:29 PM CDTSpecial Weather StatementLZKPolk31 min
Aug 17, 2:32 PM CDTSpecial Weather StatementLZKPolk28 min
Aug 17, 3:09 PM CDTSpecial Weather StatementLZKOuachita36 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.