Alert archive / Arkansas / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 193, NWS Little Rock, AR

July 1, 2007Jefferson County, Lincoln County, Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Jul 1, 2007, 2:03 PM CDT for Jefferson County, Lincoln County, Arkansas. It was in force for 42 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 1, 2007, 2:03 PM CDT (19:03 UTC)
Expired
Jul 1, 2007, 2:45 PM CDT
In force
42 min
Issued by
NWS Little Rock, AR
Area
Counties, with a storm outline in the text

Counties Jefferson County, AR, Lincoln County, AR

The radar

The Little Rock radar (KLZK), 90 km from the middle of the area, began a volume at 19:04 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

Jackson, MS (KJAN), launched 12:00Z, 7.1 hours before the alert went out and 258 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-pSkew-T log-p diagram, Jackson, MS at 12:00Z on 2007-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1115 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 12:00Z on 2007-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -16 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1115 J/kg
Mixed-layer CIN
-63 J/kg
Mixed-layer LCL
846 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-16 m²/s²
0-3 km storm-relative helicity
-3 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.

NWS Little Rock, AR wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 1, 12:08 PM CDT, 1 hour 55 minutes earlier.

Area forecast discussion, Jul 1, 12:08 PM CDT, 1 hour 55 minutes before
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Hazardous weather outlook, Jul 1, 9:30 AM CDT, 4 hours 33 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE LITTLE ROCK AR
930 AM CDT SUN JUL 1 2007

ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-021000-
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-
930 AM CDT SUN JUL 1 2007

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

.DAY ONE...TODAY AND TONIGHT

SHOWERS AND THUNDERSTORMS CONTINUE ACROSS PARTS OF NORTHERN AND
WESTERN ARKANSAS AT THIS TIME. THE PRECIPITATION IS EXPECTED TO
CONTINUE IN THESE AREAS THE REMAINDER OF THE PERIOD AND DEVELOP
ACROSS THE REMAINDER OF THE AREA DURING THE AFTERNOON AND EVENING
HOURS. WITH A VERY MOIST AND UNSTABLE AIR MASS REMAINING OVER THE
AREA... SOME OF THE STORMS COULD BECOME STRONG WITH GUSTY WINDS
POSSIBLE. THE STRONGER STORMS WILL BE FOCUSED ACROSS MAINLY CENTRAL
ARKANSAS...ALONG A STALLED OUT FRONTAL BOUNDARY SITTING ACROSS THIS
PART OF THE STATE.

THE GREATEST CONCERN FROM THESE THUNDERSTORMS WILL BE THE POTENTIAL
FOR HEAVY RAIN. COPIOUS AMOUNTS OF GULF MOISTURE REMAIN IN PLACE AS
WINDS CONTINUE FROM THE SOUTH. IN ADDITION...WINDS IN THE LOWEST
LAYERS OF THE ATMOSPHERE REMAIN LIGHT AND ANY THUNDERSTORMS THAT
DEVELOP WILL BE VERY SLOW MOVERS AND COULD DROP A LARGE AMOUNT OF
RAIN IN A SHORT AMOUNT OF TIME.

THE SHOWERS AND THUNDERSTORMS WILL SLOWLY DISSIPATE DURING THE
EVENING HOURS WITH THE LOSS OF DAYTIME HEATING BUT NOT COMPLETELY
END.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

THE PERSISTENT UPPER LOW THAT HAS BEEN MEANDERING OVER THE CENTRAL
AND SOUTHERN PLAINS FOR THE PAST WEEK OR SO IS EXPECTED TO SLOWLY
SINK TO THE SOUTHWEST. AS SUCH...THERE WILL BE A CONTINUING CHANCE
OF MAINLY LATE AFTERNOON THROUGH EARLY EVENING SHOWERS AND
THUNDERSTORMS. SOME OF THE THUNDERSTORMS WILL PRODUCE LOCALLY HEAVY
RAIN WITH THE BEST CHANCES OVER THE WESTERN PART OF THE STATE. THE
UPPER LEVEL DISTURBANCE WILL BE LOCATED IN SOUTHWEST TEXAS BY THE
END OF WEDNESDAY WHICH WILL ALLOW DRIER AIR TO WORK IN FROM THE
NORTH.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THE PRESENT TIME.

&&

VISIT NWS LITTLE ROCK ON THE WEB AT WWW.SRH.NOAA.GOV/LZK

56

In the hours before

Special weather statement, Jul 1, 1:03 PM CDT, 1 hour before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
103 PM CDT SUN JUL 1 2007

ARZ055-062-011835-
DALLAS-GRANT-
103 PM CDT SUN JUL 1 2007

...SIGNIFICANT WEATHER ALERT FOR DALLAS AND GRANT COUNTIES UNTIL 130
PM CDT...

AT 101 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 9 MILES EAST OF CARTHAGE...MOVING NORTHEAST AT 5
MPH.

WIND GUSTS UP TO 40 MPH AND HEAVY RAIN ARE POSSIBLE WITH THIS STORM.

FREQUENT...DANGEROUS LIGHTNING IS OCCURRING WITH THIS STORM. IF
OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE
INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS
AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY.

56
Special weather statement, Jul 1, 1:40 PM CDT, 23 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
140 PM CDT SUN JUL 1 2007

ARZ055-056-063-011920-
CLEVELAND-GRANT-JEFFERSON-
140 PM CDT SUN JUL 1 2007

...SIGNIFICANT WEATHER ALERT FOR CLEVELAND...GRANT AND JEFFERSON
COUNTIES UNTIL 215 PM CDT...

AT 139 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 8 MILES NORTH OF RISON...MOVING NORTHEAST AT 15
MPH.

WIND GUSTS UP TO 40 MPH AND HEAVY RAIN ARE POSSIBLE WITH THIS STORM.

FREQUENT...DANGEROUS LIGHTNING IS OCCURRING WITH THIS STORM. IF
OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE
INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS
AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY.

56

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 30, 7:18 PM CDTSevere Thunderstorm WarningLZKWoodruff42 min
Jun 30, 8:28 PM CDTFlash Flood WarningLZKBaxter2 hr
Jul 1, 4:03 AM CDTFlash Flood WatchLZKBaxter, Cleburne, Conway, Faulkner, Fulton, Independence and 8 more39 hr
Jul 1, 3:03 PM CDTFlash Flood WarningLZKPerry117 min
Jul 1, 3:11 PM CDTFlash Flood WarningLZKYell2 hr

Nearby

Severe Thunderstorm Warnings in Arkansas, 2007Every 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.