Alert archive / Arkansas / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 281, NWS Shreveport, LA

November 1, 2010Columbia County, Union County, Arkansas

NWS Shreveport, LA issued this severe thunderstorm warning at Nov 1, 2010, 10:30 PM CDT for Columbia County, Union County, Arkansas. It was in force for 45 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: Nov 1, 2010, 10:30 PM CDT (03:30 UTC)
Expired: Nov 1, 2010, 11:15 PM CDT
In force: 45 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

Counties Columbia County, AR, Union County, AR

The radar

The Shreveport radar (KSHV), 120 km from the middle of the area, began a volume at 03:30 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
Nov 1, 7:52 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 3.5 hours before the alert went out and 111 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: 1892 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 1186 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 178 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 6.1

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 Shreveport, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Nov 1, 10:18 PM CDT, 12 minutes earlier.

Area forecast discussion, Nov 1, 10:18 PM CDT, 12 minutes before

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Hazardous weather outlook, Nov 1, 11:49 AM CDT, 10 hours 41 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
1149 AM CDT MON NOV 1 2010

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-
TXZ096-097-108>112-124>126-136>138-149>153-165>167-021215-
SEVIER-HOWARD-LITTLE RIVER-HEMPSTEAD-NEVADA-MILLER-LAFAYETTE-
COLUMBIA-UNION AR-CADDO-BOSSIER-WEBSTER-CLAIBORNE-LINCOLN-
UNION LA-DE SOTO-RED RIVER-BIENVILLE-JACKSON-OUACHITA-SABINE LA-
NATCHITOCHES-WINN-GRANT-CALDWELL-LA SALLE-MCCURTAIN-BOWIE-
FRANKLIN-TITUS-CAMP-MORRIS-CASS-WOOD-UPSHUR-MARION-SMITH-GREGG-
HARRISON-CHEROKEE-RUSK-PANOLA-NACOGDOCHES-SHELBY-ANGELINA-
SAN AUGUSTINE-SABINE TX-
1149 AM CDT MON NOV 1 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
ARKANSAS...SOUTHWEST ARKANSAS...NORTH CENTRAL LOUISIANA...
NORTHWEST LOUISIANA...SOUTHEAST OKLAHOMA...EAST TEXAS AND
NORTHEAST TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

SHOWERS AND THUNDERSTORMS WILL BEGIN TO DEVELOP LATER THIS
AFTERNOON AS A LOW PRESSURE SYSTEM APPROACHES FROM THE WEST. THIS
CONVECTIVE ACTIVITY WILL INCREASE IN COVERAGE THROUGH THE EVENING
ACROSS NORTHEAST TEXAS AND WESTERN LOUISIANA. A FEW OF THESE
STORMS MAY BECOME SEVERE...PRODUCING LARGE HAIL AND DAMAGING
WINDS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

RAINFALL...WITH SOME EMBEDDED THUNDERSTORMS...WILL BECOME
WIDESPREAD INTO TUESDAY...AND BEGIN TO DIMINISH BY EARLY
WEDNESDAY. RAINFALL AMOUNTS OF TWO TO OVER THREE INCHES ARE
POSSIBLE DURING THIS PERIOD ACROSS NORTH-CENTRAL LOUISIANA...WHILE
SOUTHWEST ARKANSAS...NORTHWEST LOUISIANA...NORTHEAST TEXAS...AND
SOUTHEAST OKLAHOMA...WILL GENERALLY SEE BETWEEN ONE AND TWO INCHES
OF RAIN.

.SPOTTER INFORMATION STATEMENT...

THE ACTIVATION OF EMERGENCY MANAGERS...SKYWARN NETWORKS...AND STORM
SPOTTERS...MAY BE POSSIBLE THROUGH TONIGHT.

05

In the hours before

Local storm report, Nov 1, 9:25 PM CDT, 1 hour 5 minutes before

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Local storm report, Nov 1, 9:27 PM CDT, 1 hour 3 minutes before

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Local storm report, Nov 1, 9:30 PM CDT, 1 hour before

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Local storm report, Nov 1, 10:13 PM CDT, 17 minutes before

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Local storm report, Nov 1, 10:18 PM CDT, 12 minutes before

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Local storm report, Nov 1, 10:22 PM CDT, 8 minutes before

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The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 1, 8:54 PM CDT	Severe Thunderstorm Warning	SHV	Cass	66 min
Nov 2, 12:54 AM CDT	Areal Flood Advisory	SHV	Sabine	3 hr
Nov 2, 2:21 AM CDT	Severe Thunderstorm Warning	SHV	Shelby	27 min
Nov 1, 8:36 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo	54 min
Nov 1, 9:17 PM CDT	Severe Thunderstorm Warning	SHV	Bossier	43 min
Nov 1, 9:30 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo	45 min
Nov 1, 10:02 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Webster	58 min
Nov 1, 10:01 PM CDT	Severe Thunderstorm Warning	SHV	Hempstead, Lafayette, Miller, Nevada	59 min
Nov 1, 10:57 PM CDT	Severe Thunderstorm Warning	SHV	Hempstead, Howard	32 min
Nov 1, 11:05 PM CDT	Severe Thunderstorm Warning	SHV	Hempstead, Nevada	25 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2010 Every severe thunderstorm warning in 2010

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.