Alert archive / Arkansas / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 299, NWS Little Rock, AR

August 19, 20174 counties in Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Aug 19, 2017, 4:00 PM CDT for 4 counties in Arkansas. It was in force for 30 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 19, 2017, 4:00 PM CDT (21:00 UTC)
Expired: Aug 19, 2017, 4:30 PM CDT
In force: 30 min
Issued by: NWS Little Rock, AR
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Baxter County, AR, Fulton County, AR, Izard County, AR, Stone County, AR

The radar

The Little Rock radar (KLZK), 148 km from the middle of the area, began a volume at 21:02 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, 9.0 hours before the alert went out and 176 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: 2292 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 1029 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 116 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

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 19, 2:57 PM CDT, 1 hour 3 minutes earlier.

Area forecast discussion, Aug 19, 2:57 PM CDT, 1 hour 3 minutes before

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Hazardous weather outlook, Aug 19, 3:25 AM CDT, 12 hours 35 minutes before

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In the hours before

Special weather statement, Aug 19, 3:50 PM CDT, 10 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
Aug 18, 7:23 PM CDT	Severe Thunderstorm Warning	LZK	Newton, Searcy	24 min
Aug 18, 7:30 PM CDT	Special Weather Statement	LZK	Searcy	45 min
Aug 18, 7:32 PM CDT	Severe Thunderstorm Warning	LZK	Johnson, Logan	43 min
Aug 18, 7:49 PM CDT	Special Weather Statement	LZK	Newton	41 min
Aug 18, 8:06 PM CDT	Severe Thunderstorm Warning	LZK	Johnson, Logan, Pope, Yell	39 min
Aug 18, 8:24 PM CDT	Special Weather Statement	LZK	Johnson	51 min
Aug 18, 8:42 PM CDT	Special Weather Statement	LZK	Yell	48 min
Aug 18, 9:09 PM CDT	Special Weather Statement	LZK	Yell	51 min
Aug 18, 9:20 PM CDT	Severe Thunderstorm Warning	LZK	Yell	15 min
Aug 18, 9:25 PM CDT	Special Weather Statement	LZK	Perry	50 min
Aug 18, 10:26 PM CDT	Special Weather Statement	LZK	Saline	49 min
Aug 18, 10:47 PM CDT	Special Weather Statement	LZK	Lonoke	43 min
Aug 18, 10:51 PM CDT	Severe Thunderstorm Warning	LZK	Lonoke, Pulaski	39 min
Aug 18, 10:52 PM CDT	Flash Flood Warning	LZK	Pulaski	113 min
Aug 18, 11:17 PM CDT	Severe Thunderstorm Warning	LZK	Lonoke, Prairie	43 min
Aug 18, 11:46 PM CDT	Special Weather Statement	LZK	Arkansas	44 min
Aug 19, 12:25 AM CDT	Special Weather Statement	LZK	Arkansas	50 min
Aug 19, 2:50 AM CDT	Heat Advisory	LZK	Arkansas, Bradley, Calhoun, Clark, Cleveland, Conway and 20 more	40 hr
Aug 19, 3:50 PM CDT	Special Weather Statement	LZK	Baxter	25 min
Aug 19, 4:26 PM CDT	Special Weather Statement	LZK	Izard	34 min
Aug 19, 4:59 PM CDT	Special Weather Statement	LZK	Sharp	31 min
Aug 19, 5:25 PM CDT	Special Weather Statement	LZK	Sharp	35 min
Aug 19, 5:56 PM CDT	Special Weather Statement	LZK	Independence	34 min
Aug 19, 6:28 PM CDT	Special Weather Statement	LZK	Cleburne	32 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2017 Every 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.