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-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: 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.

Issued	Product	Office	Counties	Lasted
Apr 21, 9:07 PM CDT	Severe Thunderstorm Warning	LZK	Baxter, Marion, Searcy	38 min
Apr 21, 9:36 PM CDT	Severe Thunderstorm Warning	LZK	Baxter, Izard, Stone	39 min
Apr 21, 10:07 PM CDT	Special Weather Statement	LZK	Polk	38 min
Apr 21, 10:30 PM CDT	Severe Thunderstorm Warning	LZK	Polk, Scott	45 min
Apr 21, 11:30 PM CDT	Special Weather Statement	LZK	Lonoke	45 min
Apr 21, 11:42 PM CDT	Severe Thunderstorm Warning	LZK	Arkansas, Jefferson, Lonoke, Prairie	48 min
Apr 21, 11:47 PM CDT	Special Weather Statement	LZK	White	43 min
Apr 21, 11:47 PM CDT	Severe Thunderstorm Warning	LZK	Clark, Garland, Hot Spring, Montgomery, Pike	32 min
Apr 22, 12:32 AM CDT	Special Weather Statement	LZK	Monroe	28 min
Apr 22, 12:36 AM CDT	Special Weather Statement	LZK	White	39 min
Apr 22, 12:48 AM CDT	Special Weather Statement	LZK	Grant, Hot Spring, Saline	42 min
Apr 22, 1:33 AM CDT	Special Weather Statement	LZK	Grant, Jefferson	42 min
Apr 22, 2:17 AM CDT	Special Weather Statement	LZK	Arkansas, Cleveland, Jefferson, Lincoln	43 min
Apr 22, 2:48 AM CDT	Severe Thunderstorm Warning	LZK	Arkansas, Cleveland, Desha, Jefferson, Lincoln	42 min
Apr 22, 3:29 AM CDT	Special Weather Statement	LZK	Desha	46 min
Apr 22, 9:32 AM CDT	River Flood Advisory	LZK	Searcy	24 hr
Apr 22, 10:09 AM CDT	River Flood Warning	LZK	Randolph	32 days
Apr 22, 10:22 AM CDT	River Flood Warning	LZK	White, Woodruff	60 days

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.