Alert archive / Louisiana / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 342, NWS Shreveport, LA

May 22, 2008Union Parish, Louisiana; Union County, Arkansas

NWS Shreveport, LA issued this severe thunderstorm warning at May 22, 2008, 5:50 PM CDT for Union Parish, Louisiana; Union County, Arkansas. It was in force for 40 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: May 22, 2008, 5:50 PM CDT (22:50 UTC)
Expired: May 22, 2008, 6:30 PM CDT
In force: 40 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

Counties Union County, AR, Union Parish, LA

The radar

The Shreveport radar (KSHV), 141 km from the middle of the area, began a volume at 22:51 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

Shreveport, LA (KSHV), launched 12:00Z, 10.8 hours before the alert went out and 132 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: 1485 J/kg
Mixed-layer CIN: -176 J/kg
Mixed-layer LCL: 587 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -17 m²/s²
0-3 km storm-relative helicity: -30 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 Shreveport, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at May 22, 3:33 PM CDT, 2 hours 17 minutes earlier.

Area forecast discussion, May 22, 3:33 PM CDT, 2 hours 17 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
333 PM CDT THU MAY 22 2008

.DISCUSSION...
SCATTERED STRONG TSTMS...WITH HAIL POTENTIAL...STREAMING NORTHWARD
ACROSS CENTRAL LA...INTO NORTHERN PARTS OF STATE. ISOLATED SMALLER
CELLS POPPING UP OVER NW LA/EXTREME SW AR. PLACING CHANCE POPS FOR
TSTMS OVER AND JUST NORTH OF STRONGER ACTIVITY...ISOLATED
FURTHER NORTH. AS DAYTIME HEATING IS MAIN TRIGGER...CARRYING
CONVECTION UNTIL AROUND SUNSET. UPPER RIDGE OVERHEAD BUILDING
OVERHEAD IN RESPONSE TO DIGGING UPPER TROF OVER ROCKIES...PLAINLY
SEEN ON WATER VAPOR. THROUGH MOST OF THE HOLIDAY WEEKEND...KEEP
ISOLATED DIURNAL CONVECTION...WITH TEMPERATURES INCHING UPWARD TO
AROUND MID 90S...AND SOUTHERLY BREEZE...ALTHOUGH NOT AS STRONG AS TODAY.
SRONGER MID LEVEL CAP NOTED BY MEMORIAL DAY...SO LEFT OUT POPS
FROM SUNDAY NIGHT UNTIL COLD FRONT BEGINS TO ARRIVE LATE TUESDAY.
THIS FRONT WILL BARELY PUSH THRU AREA AS IT MANEURVERS AROUND
DISRUPTED UPPER RIDGE...BUT SHOULD PROVIDE ENOUGH FOCUS FOR SCATTERED
CONVECTION... AND WILL BRING TEMPS BACK DOWN NEAR SEASONAL VALUES
BY END OF EXTENDED/VII/

&&

.AVIATION...

SOUTHERLY FLOW WILL PERSIST OVER THE REGION AS A DEEP UPPER LEVEL LOW
PRESSURE SYSTEM REMAINS NEARLY STATIONARY OVER THE ROCKIES THE NEXT
SEVERAL DAYS. THUS HIGH PRESSURE WILL BUILD OVER OUR AREA ALOFT
WHILE GULF MOISTURE STREAMS IN BENEATH IT. THUS EXPECT VERY WARM AND
HUMID WEATHER WITH MVFR CIGS COMMONPLACE FROM MIDNIGHT UNTIL
MIDDAY...LIFTING TO VFR CIGS MAINLY DURING THE AFTERNOON AND
EVENING. THE HEAT AND HUMIDITY WILL COMBINE TO PRODUCE SCATTERED
CONVECTIVE ACTIVITY EACH DAY AS WELL. /17/

&&

.PRELIMINARY POINT TEMPS/POPS...
SHV  72  93  73  95 /  20  20  20  20
MLU  69  92  71  95 /  20  20  20  20
DEQ  69  89  71  95 /  10  20  20  30
TXK  69  92  71  95 /  20  20  20  30
ELD  69  91  70  94 /  20  20  20  20
TYR  72  93  74  95 /  10  20  20  30
GGG  72  93  74  95 /  20  20  20  20
LFK  73  95  74  94 /  20  20  20  20

&&

.SHV WATCHES/WARNINGS/ADVISORIES...
AR...NONE.
LA...NONE.
OK...NONE.
TX...NONE.
&&

Hazardous weather outlook, May 22, 1:49 PM CDT, 4 hours 1 minute before

HAZARDOUS WEATHER OUTLOOK...CORRECTED
NATIONAL WEATHER SERVICE SHREVEPORT LA
149 PM CDT THU MAY 22 2008

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-TXZ096-
097-108>112-124>126-136>138-149>153-165>167-231100-
ANGELINA-BIENVILLE-BOSSIER-BOWIE-CADDO-CALDWELL-CAMP-CASS-CHEROKEE-
CLAIBORNE-COLUMBIA-DE SOTO-FRANKLIN-GRANT-GREGG-HARRISON-HEMPSTEAD-
HOWARD-JACKSON-LA SALLE-LAFAYETTE-LINCOLN-LITTLE RIVER-MARION-
MCCURTAIN-MILLER-MORRIS-NACOGDOCHES-NATCHITOCHES-NEVADA-OUACHITA-
PANOLA-RED RIVER LA-RED RIVER TX-RUSK-SABINE LA-SABINE TX-
SAN AUGUSTINE-SEVIER-SHELBY-SMITH-TITUS-UNION AR-UNION LA-UPSHUR-
WEBSTER-WINN-WOOD-
149 PM CDT THU MAY 22 2008

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...

SCATTERED SHOWERS AND THUNDERSTORMS WILL INCREASE ACROSS THE
EAST TEXAS LAKES AREA BY EARLY THIS AFTERNOON...AS A WEAK UPPER
LEVEL DISTURBANCE FROM SOUTH TEXAS...MOVES NORTHEAST INTO THE
AREA. MORE ISOLATED DEVELOPMENT CAN BE EXPECTED LATER IN THE
AFTERNOON NORTH OF INTERSTATE 20. WITH THE STRONG INSTABILITY
PRESENT...AN ISOLATED STORM COULD BECOME SEVERE...PRODUCING HAIL AND
BRIEF DAMAGING WIND GUSTS. HOWEVER...FOR THE MOST PART...FREQUENT
DEADLY LIGHTNING CAN BE EXPECTED WITH THUNDERSTORMS...WITH THE
OVERALL THREAT OF SEVERE WEATHER APPEARING MINIMAL.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

STORM SPOTTER...HAM RADIO OPERATOR...AND EMERGENCY MANAGEMENT
PERSONNEL ACTIVATION WILL NOT BE NEEDED THIS AFTERNOON OR
TONIGHT.

VII

In the hours before

Local storm report, May 22, 4:56 PM CDT, 54 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED FOR DIRECTION FROM CITY
NATIONAL WEATHER SERVICE SHREVEPORT LA
456 PM CDT THU MAY 22 2008

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0432 PM     TSTM WND DMG     5 NW MARSHALL           32.59N 94.29W
05/22/2008                   HARRISON           TX   LAW ENFORCEMENT

            SEVERAL TREES DOWN IN THE COMMUNITY OF NESBITT

&&

12

Local storm report, May 22, 5:02 PM CDT, 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
502 PM CDT THU MAY 22 2008

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0410 PM     HAIL             9 S JENA                31.56N 92.13W
05/22/2008  E0.75 INCH       LA SALLE           LA   LAW ENFORCEMENT

            NEAR NEBO.

0420 PM     HAIL             8 SE LINDEN             32.93N 94.26W
05/22/2008  E0.75 INCH       CASS               TX   LAW ENFORCEMENT

            NEAR KILDARE.

&&

17

Local storm report, May 22, 5:06 PM CDT, 44 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE SHREVEPORT LA
506 PM CDT THU MAY 22 2008

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0432 PM     TSTM WND DMG     5 NW MARSHALL           32.59N 94.41W
05/22/2008                   HARRISON           TX   LAW ENFORCEMENT

            SEVERAL TREES DOWN IN THE COMMUNITY OF NESBITT

&&

12

Local storm report, May 22, 5:07 PM CDT, 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
507 PM CDT THU MAY 22 2008

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0410 PM     TSTM WND DMG     SAREPTA                 32.90N 93.45W
05/22/2008                   WEBSTER            LA   LAW ENFORCEMENT

            TREES DOWN IN THE TOWN OF SAREPTA

&&

12

Local storm report, May 22, 5:32 PM CDT, 18 minutes before

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Local storm report, May 22, 5:46 PM CDT, 4 minutes before

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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
        Please try again in a few minutes.
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The office that day

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

Issued	Product	Office	Counties	Lasted
May 22, 3:30 PM CDT	Severe Thunderstorm Warning	SHV	Harrison, Marion	45 min
May 22, 4:17 PM CDT	Severe Thunderstorm Warning	SHV	Cass, Marion	43 min
May 22, 4:30 PM CDT	Severe Thunderstorm Warning	SHV	Harrison, Marion	45 min
May 22, 5:13 PM CDT	Severe Thunderstorm Warning	SHV	Bowie, Cass	32 min
May 22, 2:18 PM CDT	Severe Thunderstorm Warning	SHV	Grant, Winn	57 min
May 22, 3:39 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Grant, Jackson, Natchitoches, Winn	36 min
May 22, 4:01 PM CDT	Severe Thunderstorm Warning	SHV	Grant, LaSalle	44 min
May 22, 4:10 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo, Webster	35 min
May 22, 4:34 PM CDT	Severe Thunderstorm Warning	SHV	Columbia	41 min
May 22, 5:04 PM CDT	Severe Thunderstorm Warning	SHV	Miller	41 min
May 22, 5:18 PM CDT	Severe Thunderstorm Warning	SHV	Nevada	27 min
May 22, 5:31 PM CDT	Severe Thunderstorm Warning	SHV	Columbia, Nevada	29 min
May 22, 5:42 PM CDT	Severe Thunderstorm Warning	SHV	Hempstead, Howard, Little River, Miller, Nevada, Sevier	48 min
May 22, 6:19 PM CDT	Severe Thunderstorm Warning	SHV	Howard, Sevier	56 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2008 Severe Thunderstorm Warnings in Arkansas, 2008 Every severe thunderstorm warning in 2008

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.