Alert archive / Arkansas / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 241, NWS Little Rock, AR

October 18, 20075 counties in Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Oct 18, 2007, 12:10 AM CDT for 5 counties in Arkansas. It was in force for 50 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: Oct 18, 2007, 12:10 AM CDT (05:10 UTC)
Expired: Oct 18, 2007, 1:00 AM CDT
In force: 50 min
Issued by: NWS Little Rock, AR
Area: Storm-based polygon

Counties Baxter County, AR, Marion County, AR, Newton County, AR, Searcy County, AR, Stone County, AR

The radar

The Little Rock radar (KLZK), 139 km from the middle of the area, began a volume at 05:10 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Oct 17, 11:38 PM CDT	Tornado Watch	SPC	3 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 5.2 hours before the alert went out and 142 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: 1262 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 618 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 266 m²/s²
0-3 km storm-relative helicity: 287 m²/s²
Significant tornado parameter: 2.4
Supercell composite: 8.3

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 Oct 17, 9:03 PM CDT, 3 hours 7 minutes earlier.

Area forecast discussion, Oct 17, 9:03 PM CDT, 3 hours 7 minutes before

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Hazardous weather outlook, Oct 17, 11:45 PM CDT, 25 minutes before

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In the hours before

Local storm report, Oct 17, 8:41 PM CDT, 3 hours 29 minutes before

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Local storm report, Oct 17, 8:56 PM CDT, 3 hours 14 minutes before

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Local storm report, Oct 17, 8:59 PM CDT, 3 hours 11 minutes before

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Local storm report, Oct 17, 9:04 PM CDT, 3 hours 6 minutes before

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Local storm report, Oct 17, 10:43 PM CDT, 1 hour 27 minutes before

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      <p id="message2">
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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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Local storm report, Oct 17, 11:31 PM CDT, 39 minutes before

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      <p id="message1">
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      <p id="message2">
        Please try again in a few minutes.
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      <p class="small" id="detail">
        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.

Issued	Product	Office	Counties	Lasted
Oct 17, 7:22 PM CDT	Tornado Warning	LZK	White, Woodruff	38 min
Oct 17, 8:19 PM CDT	Severe Thunderstorm Warning	LZK	Monroe	41 min
Oct 17, 9:20 PM CDT	Severe Thunderstorm Warning	LZK	Sharp	25 min
Oct 17, 9:48 PM CDT	Severe Thunderstorm Warning	LZK	Sharp	12 min
Oct 17, 10:02 PM CDT	Severe Thunderstorm Warning	LZK	Montgomery, Pike	43 min
Oct 17, 10:16 PM CDT	Severe Thunderstorm Warning	LZK	Baxter, Marion	29 min
Oct 17, 10:35 PM CDT	Severe Thunderstorm Warning	LZK	Garland	40 min
Oct 17, 10:47 PM CDT	Severe Thunderstorm Warning	LZK	Clark, Hot Spring, Pike	43 min
Oct 17, 11:07 PM CDT	Severe Thunderstorm Warning	LZK	Clark, Dallas, Grant, Hot Spring	38 min
Oct 17, 11:15 PM CDT	Severe Thunderstorm Warning	LZK	Saline	30 min
Oct 17, 11:20 PM CDT	Severe Thunderstorm Warning	LZK	Johnson, Newton	55 min
Oct 17, 11:34 PM CDT	Severe Thunderstorm Warning	LZK	Clark, Hot Spring	26 min
Oct 17, 11:44 PM CDT	Severe Thunderstorm Warning	LZK	Faulkner, Pulaski	31 min
Oct 17, 11:50 PM CDT	Severe Thunderstorm Warning	LZK	Grant	25 min
Oct 18, 12:13 AM CDT	Severe Thunderstorm Warning	LZK	Jefferson, Lonoke, Pulaski	32 min
Oct 18, 12:29 AM CDT	Severe Thunderstorm Warning	LZK	Grant	46 min
Oct 18, 12:46 AM CDT	Severe Thunderstorm Warning	LZK	Jefferson	29 min
Oct 18, 1:14 AM CDT	Severe Thunderstorm Warning	LZK	Fulton	31 min
Oct 18, 1:17 AM CDT	Severe Thunderstorm Warning	LZK	Monroe, Prairie, Woodruff	28 min
Oct 18, 4:15 AM CDT	Lake Wind Advisory	LZK	Arkansas, Baxter, Bradley, Calhoun, Clark, Cleburne and 28 more	14 hr
Oct 18, 10:56 AM CDT	River Flood Warning	LZK	Jackson, Woodruff	17 days

Nearby

Severe Thunderstorm Warnings in Arkansas, 2007 Every severe thunderstorm warning in 2007

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.