Alert archive / Arkansas / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 340, NWS Little Rock, AR

June 30, 20095 counties in Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Jun 30, 2009, 3:46 PM CDT for 5 counties in Arkansas. It was in force for 44 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: Jun 30, 2009, 3:46 PM CDT (20:46 UTC)
Expired: Jun 30, 2009, 4:30 PM CDT
In force: 44 min
Issued by: NWS Little Rock, AR
Area: Storm-based polygon

Counties Newton County, AR, Pope County, AR, Searcy County, AR, Stone County, AR, Van Buren County, AR

The radar

The Little Rock radar (KLZK), 109 km from the middle of the area, began a volume at 20:46 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
Jun 30, 1:54 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 8.8 hours before the alert went out and 161 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: 73 J/kg
Mixed-layer CIN: -179 J/kg
Mixed-layer LCL: 2161 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 89 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 Jun 30, 12:35 PM CDT, 3 hours 11 minutes earlier.

Area forecast discussion, Jun 30, 12:35 PM CDT, 3 hours 11 minutes before

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Hazardous weather outlook, Jun 30, 5:00 AM CDT, 10 hours 46 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LITTLE ROCK AR
500 AM CDT TUE JUN 30 2009

ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-011000-
ARKANSAS-BAXTER-BOONE-BRADLEY-CALHOUN-CLARK-CLEBURNE-CLEVELAND-
CONWAY-DALLAS-DESHA-DREW-FAULKNER-FULTON-GARLAND-GRANT-HOT SPRING-
INDEPENDENCE-IZARD-JACKSON-JEFFERSON-JOHNSON-LINCOLN-LOGAN-LONOKE-
MARION-MONROE-MONTGOMERY-NEWTON-OUACHITA-PERRY-PIKE-POLK-POPE-
PRAIRIE-PULASKI-SALINE-SCOTT-SEARCY-SHARP-STONE-VAN BUREN-WHITE-
WOODRUFF-YELL-
500 AM CDT TUE JUN 30 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR A LARGE PART OF ARKANSAS.

.DAY ONE...TODAY AND TONIGHT

AN UPPER LEVEL RIDGE CONTINUES OVER THE WESTERN U.S. WITH NORTHWEST
FLOW OVER ARKNASAS. SURFACE HIGH PRESSURE REMAINS OVER TEXAS AND A
COLD FRONT IS LOCATED IN SOUTHERN MISSOURI. THIS WILL BE A SLOW
MOVING FRONT BUT SHOWERS AND THUNDERSTORMS WILL BE FOCUSED ON THIS
BOUNDARY TODAY. AS THE ATMOSPHERE CONTINUES TO DESTABILIZE THROUGH
THE DAY...DAMAGING WINDS AND LARGE HAIL WILL BE THE MAIN THREATS.
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY OVER MUCH OF
NORTH AND CENTRAL ARKANSAS. THUNDERSTORMS ARE EXPECTED TO DISSIPATE
DURING THE LATE EVENING HOURS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

NORTHWEST FLOW ALOFT WILL CONTINUE THROUGH EARLY NEXT WEEK. THERE
WILL BE CHANCES OF AFTERNOON TO EARLY EVENING CONVECTION NEARLY EACH
DAY AS SEVERAL UPPER LEVEL DISTURBANCES MOVE THROUGH THE PREVAILING
FLOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TODAY.

&&

VISIT NWS LITTLE ROCK ON THE WEB. GO TO HTTP://WEATHER.GOV AND
CLICK ON CENTRAL ARKANSAS.

51

In the hours before

Local storm report, Jun 30, 2:23 PM CDT, 1 hour 23 minutes before

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Local storm report, Jun 30, 2:27 PM CDT, 1 hour 19 minutes before

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Local storm report, Jun 30, 2:43 PM CDT, 1 hour 3 minutes before

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Local storm report, Jun 30, 2:45 PM CDT, 1 hour 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
Jun 30, 4:21 AM CDT	Severe Thunderstorm Warning	LZK	Marion	54 min
Jun 30, 7:02 AM CDT	Severe Thunderstorm Warning	LZK	Boone, Marion	43 min
Jun 30, 7:33 AM CDT	Severe Thunderstorm Warning	LZK	Boone, Marion	42 min
Jun 30, 1:36 PM CDT	Severe Thunderstorm Warning	LZK	Newton, Pope, Searcy, Van Buren	39 min
Jun 30, 2:16 PM CDT	Severe Thunderstorm Warning	LZK	Pope, Searcy, Stone, Van Buren	44 min
Jun 30, 2:30 PM CDT	Severe Thunderstorm Warning	LZK	Boone	45 min
Jun 30, 3:11 PM CDT	Severe Thunderstorm Warning	LZK	Boone, Marion, Newton, Searcy	39 min
Jun 30, 3:29 PM CDT	Severe Thunderstorm Warning	LZK	Cleburne, Conway, Faulkner, Van Buren	46 min
Jun 30, 3:53 PM CDT	Severe Thunderstorm Warning	LZK	Garland, Hot Spring, Pulaski, Saline	52 min
Jun 30, 4:06 PM CDT	Severe Thunderstorm Warning	LZK	Garland, Grant, Hot Spring, Saline	39 min
Jun 30, 4:14 PM CDT	Severe Thunderstorm Warning	LZK	Cleburne, Conway, Faulkner, Pope, Searcy, Stone and 1 more	46 min
Jun 30, 4:23 PM CDT	Severe Thunderstorm Warning	LZK	Lonoke, Pulaski, Saline	52 min
Jun 30, 4:40 PM CDT	Severe Thunderstorm Warning	LZK	Grant, Hot Spring, Saline	50 min
Jun 30, 4:57 PM CDT	Severe Thunderstorm Warning	LZK	Cleburne, Conway, Faulkner, Van Buren, White	48 min
Jun 30, 4:58 PM CDT	Severe Thunderstorm Warning	LZK	Lonoke, Pulaski	47 min
Jun 30, 5:04 PM CDT	Severe Thunderstorm Warning	LZK	Conway, Faulkner, Perry, Pulaski	41 min
Jun 30, 5:05 PM CDT	Severe Thunderstorm Warning	LZK	Arkansas, Grant, Jefferson, Lonoke, Prairie, Pulaski and 1 more	40 min
Jun 30, 5:08 PM CDT	Severe Thunderstorm Warning	LZK	Clark, Garland, Hot Spring, Montgomery, Pike	52 min
Jun 30, 5:09 PM CDT	Severe Thunderstorm Warning	LZK	Conway, Newton, Pope, Searcy, Van Buren	41 min
Jun 30, 5:20 PM CDT	Severe Thunderstorm Warning	LZK	Lonoke, Prairie, Pulaski	40 min
Jun 30, 5:43 PM CDT	Severe Thunderstorm Warning	LZK	Lonoke, Prairie	47 min
Jun 30, 6:17 PM CDT	Severe Thunderstorm Warning	LZK	Monroe, Prairie	43 min
Jun 30, 6:30 PM CDT	Severe Thunderstorm Warning	LZK	Cleveland, Drew, Lincoln	45 min
Jun 30, 6:48 PM CDT	Severe Thunderstorm Warning	LZK	Grant, Jefferson, Pulaski, Saline	42 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2009 Every severe thunderstorm warning in 2009

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.