Alert archive / Arkansas / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 293, NWS Little Rock, AR

July 20, 20186 counties in Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Jul 20, 2018, 8:37 AM CDT for 6 counties in Arkansas. It was in force for 38 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 20, 2018, 8:37 AM CDT (13:37 UTC)
Expired: Jul 20, 2018, 9:15 AM CDT
In force: 38 min
Issued by: NWS Little Rock, AR
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Baxter County, AR, Cleburne County, AR, Independence County, AR, Izard County, AR, Sharp County, AR, Stone County, AR

The radar

The Little Rock radar (KLZK), 127 km from the middle of the area, began a volume at 13:39 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, 1.6 hours before the alert went out and 199 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1151 J/kg
Mixed-layer CIN: -259 J/kg
Mixed-layer LCL: 1847 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 197 m²/s²
0-3 km storm-relative helicity: 203 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

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 Jul 20, 4:03 AM CDT, 4 hours 34 minutes earlier.

Area forecast discussion, Jul 20, 4:03 AM CDT, 4 hours 34 minutes before

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Hazardous weather outlook, Jul 20, 5:00 AM CDT, 3 hours 37 minutes before

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In the hours before

Special weather statement, Jul 20, 7:23 AM CDT, 1 hour 14 minutes before

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Special weather statement, Jul 20, 7:39 AM CDT, 58 minutes before

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Special weather statement, Jul 20, 8:04 AM CDT, 33 minutes before

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Local storm report, Jul 20, 8:10 AM CDT, 27 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 7:19 PM CDT	Severe Thunderstorm Warning	LZK	Boone, Marion, Newton	41 min
Jul 19, 7:49 PM CDT	Special Weather Statement	LZK	Baxter, Marion	41 min
Jul 19, 7:58 PM CDT	Severe Thunderstorm Warning	LZK	Boone, Marion, Newton, Searcy	47 min
Jul 19, 8:22 PM CDT	Severe Thunderstorm Warning	LZK	Baxter, Fulton, Izard, Marion, Searcy, Stone	38 min
Jul 19, 8:28 PM CDT	Severe Thunderstorm Warning	LZK	Cleburne, Conway, Faulkner, Johnson, Newton, Pope and 3 more	47 min
Jul 19, 8:49 PM CDT	Severe Thunderstorm Warning	LZK	Cleburne, Fulton, Independence, Izard, Sharp, Stone	41 min
Jul 19, 9:22 PM CDT	Special Weather Statement	LZK	Cleburne	38 min
Jul 19, 9:34 PM CDT	Special Weather Statement	LZK	Cleburne, Independence	41 min
Jul 19, 11:09 PM CDT	Special Weather Statement	LZK	Arkansas	51 min
Jul 19, 11:21 PM CDT	Severe Thunderstorm Warning	LZK	Arkansas	39 min
Jul 19, 11:59 PM CDT	Special Weather Statement	LZK	Desha	46 min
Jul 20, 12:28 AM CDT	Special Weather Statement	LZK	Drew	47 min
Jul 20, 12:36 AM CDT	Special Weather Statement	LZK	Desha	39 min
Jul 20, 1:01 AM CDT	Special Weather Statement	LZK	Drew	29 min
Jul 20, 3:37 AM CDT	Excessive Heat Warning	LZK	Arkansas, Bradley, Calhoun, Clark, Cleveland, Conway and 20 more	17 hr
Jul 20, 3:37 AM CDT	Heat Advisory	LZK	Baxter, Cleburne, Fulton, Independence, Izard, Marion and 2 more	17 hr
Jul 20, 7:23 AM CDT	Special Weather Statement	LZK	Independence, Izard, Stone	52 min
Jul 20, 7:39 AM CDT	Special Weather Statement	LZK	Baxter, Izard	36 min
Jul 20, 7:49 AM CDT	Severe Thunderstorm Warning	LZK	Baxter, Fulton, Izard, Marion, Sharp	26 min
Jul 20, 8:04 AM CDT	Special Weather Statement	LZK	Cleburne	26 min
Jul 20, 8:06 AM CDT	Severe Thunderstorm Warning	LZK	Baxter, Izard, Marion, Stone	39 min
Jul 20, 8:08 AM CDT	Severe Thunderstorm Warning	LZK	Cleburne, Faulkner, Van Buren, White	37 min
Jul 20, 8:14 AM CDT	Severe Thunderstorm Warning	LZK	Baxter, Fulton, Izard	31 min
Jul 20, 8:41 AM CDT	Special Weather Statement	LZK	Sharp	34 min
Jul 20, 8:44 AM CDT	Special Weather Statement	LZK	White	31 min
Jul 20, 9:09 AM CDT	Special Weather Statement	LZK	Cleburne, Independence, Jackson	51 min
Jul 20, 9:26 AM CDT	Severe Thunderstorm Warning	LZK	Cleburne, Independence, Jackson, White, Woodruff	49 min
Jul 20, 9:49 AM CDT	Special Weather Statement	LZK	Lonoke	26 min
Jul 20, 3:04 PM CDT	Heat Advisory	LZK	Bradley, Calhoun, Clark, Cleveland, Dallas, Desha and 10 more	28 hr

Nearby

Severe Thunderstorm Warnings in Arkansas, 2018 Every 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.