Alert archive / Louisiana / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 49, NWS Shreveport, LA

March 10, 2010Harrison County, Panola County, Texas; Bossier Parish, Caddo Parish, De Soto Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Mar 10, 2010, 8:15 PM CST for Harrison County, Panola County, Texas; Bossier Parish, Caddo Parish, De Soto Parish, Louisiana. It was in force for 45 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Mar 10, 2010, 8:15 PM CST (02:15 UTC)
Expired: Mar 10, 2010, 9:00 PM CST
In force: 45 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

Counties Bossier Parish, LA, Caddo Parish, LA, De Soto Parish, LA, Harrison County, TX, Panola County, TX

The radar

The Shreveport radar (KSHV), 23 km from the middle of the area, began a volume at 02:17 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.

What was reported inside it

Time	Report	Where	Remark
Mar 10, 8:45 PM CST	HAIL 0.88	4 Wsw Shreveport, LA	NICKLE SIZE HAIL AT THE INTERSECTION OF HWY 169 AND BUNKUM RD.
Mar 10, 8:46 PM CST	HAIL 0.5	Shreveport, LA	ONE HALF INCH HAIL AT THE NWS SHREVEPORT WEATHER OFFICE ON THE WEST SIDE OF SHREVEPORT.
Mar 10, 8:48 PM CST	HAIL 0.5	Shreveport, LA	HAIL WAS REPORTED AT THE SCHUMPERT MAIN MEDICAL CENTER IN SHREVEPORT.
Mar 10, 8:57 PM CST	HAIL 1.25	Shreveport, LA	HALF DOLLAR SIZED HAIL FELL AT THE CORNER OF BOULEVARD AND GILBERT IN THE EAST SIDE OF TOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 42 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
Mar 10, 3:26 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 2.3 hours before the alert went out and 31 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: 862 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1584 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 3.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

533 
WUUS54 KSHV 110215
SVRSHV
LAC015-017-031-TXC203-365-110300-
/O.NEW.KSHV.SV.W.0049.100311T0215Z-100311T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
815 PM CST WED MAR 10 2010

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN HARRISON COUNTY IN NORTHEAST TEXAS...
  EASTERN PANOLA COUNTY IN NORTHEAST TEXAS...
  SOUTH CENTRAL BOSSIER PARISH IN NORTHWEST LOUISIANA...
  CADDO PARISH IN NORTHWEST LOUISIANA...
  THIS INCLUDES THE CITY OF SHREVEPORT...
  NORTHWESTERN DE SOTO PARISH IN NORTHWEST LOUISIANA...

* UNTIL 900 PM CST

* AT 812 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR ELYSIAN FIELDS...OR 13 MILES SOUTHEAST OF
  MARSHALL...AND MOVING NORTHEAST AT 35 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  WASKOM...STONEWALL...GREENWOOD...BLANCHARD AND OIL CITY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CST WEDNESDAY EVENING
FOR SOUTHWESTERN ARKANSAS AND NORTHWESTERN LOUISIANA AND NORTHEASTERN
TEXAS.

&&

LAT...LON 3246 9446 3271 9411 3269 9408 3270 9404
      3275 9404 3281 9396 3238 9357 3198 9402
      3198 9406
TIME...MOT...LOC 0215Z 231DEG 32KT 3239 9422

$$

05

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 Mar 10, 7:54 PM CST, 21 minutes earlier.

Area forecast discussion, Mar 10, 7:54 PM CST, 21 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
754 PM CST WED MAR 10 2010

.UPDATE...
JUST SENT AN UPDATE TO CLEAR THE REMAINING COUNTIES TO OUR
NORTHWEST FROM SEVERE THUNDERSTORM WATCH #24. ALSO REMOVED
A FEW OF THE WESTERN COUNTIES IN SW AR AND NE TX FROM TOR WATCH
#22 AS THE LINE OF STORMS HAS MOVED EAST OF THE REGION. PLEASE
REFER TO LATEST WCN FOR SPECIFIC COUNTIES THAT HAVE BEEN REMOVED.

UPDATE ALREADY SENT...13.

&&

.PRELIMINARY POINT TEMPS/POPS...
SHV  50  74  47  59  41 /  60   0  30  10  10
MLU  55  77  48  59  42 /  70   0  30  10  20
DEQ  41  67  41  55  39 /  20  10  30  20  20
TXK  47  68  44  56  39 /  60  10  30  20  20
ELD  50  74  45  56  39 /  70   0  30  20  20
TYR  44  69  44  59  39 /  20   0  30  10  10
GGG  46  71  45  58  40 /  20   0  30  10  10
LFK  49  76  44  65  40 /  40   0  20  10  10

&&

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

13

Hazardous weather outlook, Mar 10, 11:02 AM CST, 9 hours 13 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
1102 AM CST WED MAR 10 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>167-111200-
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-
1102 AM CST WED MAR 10 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...TODAY AND TONIGHT...
A VIGOROUS UPPER LEVEL STORM SYSTEM WILL BE MOVING INTO THE PLAINS
THIS AFTERNOON INTO THE EVENING. THIS STORM SYSTEM WILL HELP TO
SPAWN STRONG TO SEVERE THUNDERSTORMS ACROSS THE REGION LATE THIS
AFTERNOON...INTO THE EVENING AND EARLY OVERNIGHT HOURS. THE STORMS
WILL CONTINUE TO DEVELOP ALONG A DRYLINE WHICH WILL SURGE ITS WAY
OUT OF NORTH CENTRAL AND CENTRAL TEXAS LATER TODAY. THESE STORMS
INITIALLY WILL CONTAIN LARGE HAIL ACROSS THE REGION BUT THERE IS
THE POSSIBILITY THAT THESE STORMS COULD BECOME ROOTED CLOSER TO
THE SURFACE AND THUS THERE WOULD BE A POTENTIAL FOR TORNADOES AND
STRONG DAMAGING WINDS. THESE STORMS WILL RAPIDLY MOVE EASTWARD
THIS EVENING AND SHOULD CLEAR SOUTH CENTRAL ARKANSAS AND NORTHEAST
LOUISIANA SHORTLY AFTER MIDNIGHT TONIGHT.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...

NO HAZARDOUS WEATHER IS ANTICIPATED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...
STORM SPOTTER ACTIVATION WILL LIKELY BE NEEDED THIS AFTERNOON
INTO THE OVERNIGHT HOURS ACROSS THE FOUR STATE REGION.

13

In the hours before

Local storm report, Mar 10, 7:19 PM CST, 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
719 PM CST WED MAR 10 2010

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

0715 PM     HAIL             DUBACH                  32.70N 92.66W
03/10/2010  E1.75 INCH       LINCOLN            LA   PUBLIC

&&

MBERRY

Local storm report, Mar 10, 7:29 PM CST, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
729 PM CST WED MAR 10 2010

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

0725 PM     HAIL             WASKOM                  32.48N 94.06W
03/10/2010  E0.88 INCH       HARRISON           TX   BROADCAST MEDIA

0725 PM     HAIL             KEITHVILLE              32.33N 93.83W
03/10/2010  E0.88 INCH       CADDO              LA   BROADCAST MEDIA

&&

MBERRY

Local storm report, Mar 10, 7:47 PM CST, 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
747 PM CST WED MAR 10 2010

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

0735 PM     HAIL             1 W EMERSON             33.10N 93.21W
03/10/2010  E1.75 INCH       COLUMBIA           AR   LAW ENFORCEMENT

            QUARTER TO GOLFBALL SIZED HAIL JUST WEST OF EMERSON IN
            WALKERVILLE.

0735 PM     HAIL             SHREVEPORT              32.47N 93.80W
03/10/2010  E0.75 INCH       CADDO              LA   PUBLIC

            HAIL REPORTED IN SOUTHERN HILLS PORTION OF SHREVEPORT.

&&

MBERRY

Local storm report, Mar 10, 7:48 PM CST, 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
748 PM CST WED MAR 10 2010

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

0748 PM     HAIL             LAWSON                  33.20N 92.48W
03/10/2010  E2.00 INCH       UNION              AR   LAW ENFORCEMENT

            GOLFBALL TO HEN EGG SIZE HAIL REPORTED.

&&

MBERRY

Local storm report, Mar 10, 8:03 PM CST, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
803 PM CST WED MAR 10 2010

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

0745 PM     HAIL             5 SE CANFIELD           33.13N 93.57W
03/10/2010  E1.25 INCH       LAFAYETTE          AR   LAW ENFORCEMENT

            HAIL REPORTED OVER LAKE ERLING SOUTHEAST OF CANFIELD
            ARKANSAS.

&&

MBERRY

Local storm report, Mar 10, 8:09 PM CST, 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
809 PM CST WED MAR 10 2010

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

0745 PM     HAIL             2 S TAYLOR              33.07N 93.46W
03/10/2010  E1.00 INCH       COLUMBIA           AR   AMATEUR RADIO

            QUARTER SIZE HAIL REPORTED AT THE INTERSECTION OF HWY 53
            AND CR 160.

&&

18

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 10, 6:02 PM CST	Severe Thunderstorm Warning	SHV	Cass, Harrison, Marion, Upshur	43 min
Mar 10, 6:05 PM CST	Severe Thunderstorm Warning	SHV	Gregg, Harrison, Marion, Rusk	55 min
Mar 10, 6:10 PM CST	Severe Thunderstorm Warning	SHV	Nacogdoches, Panola, Rusk, Shelby	50 min
Mar 10, 6:28 PM CST	Severe Thunderstorm Warning	SHV	Bowie, Cass	47 min
Mar 10, 6:30 PM CST	Severe Thunderstorm Warning	SHV	Cherokee, Nacogdoches, Rusk	60 min
Mar 10, 6:49 PM CST	Severe Thunderstorm Warning	SHV	Harrison, Marion, Panola	56 min
Mar 10, 6:55 PM CST	Severe Thunderstorm Warning	SHV	Cass	50 min
Mar 10, 7:02 PM CST	Severe Thunderstorm Warning	SHV	Cass, Harrison, Marion	58 min
Mar 10, 7:37 PM CST	Severe Thunderstorm Warning	SHV	Cherokee, Nacogdoches, Panola, Rusk, Shelby	53 min
Mar 10, 6:12 PM CST	Severe Thunderstorm Warning	SHV	Bossier, Caddo, Claiborne, Webster	63 min
Mar 10, 6:39 PM CST	Severe Thunderstorm Warning	SHV	Bienville, Claiborne, Jackson, Lincoln, Union	66 min
Mar 10, 7:46 PM CST	Severe Thunderstorm Warning	SHV	Union	44 min
Mar 10, 8:10 PM CST	Severe Thunderstorm Warning	SHV	Bossier, Caddo, Webster	35 min
Mar 10, 9:01 PM CST	Severe Thunderstorm Warning	SHV	Bossier, Webster	44 min
Mar 10, 9:08 PM CST	Severe Thunderstorm Warning	SHV	Claiborne	37 min
Mar 10, 9:36 PM CST	Severe Thunderstorm Warning	SHV	Bienville, Claiborne, Webster	39 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2010 Severe Thunderstorm Warnings in Texas, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.