Alert archive / Texas / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 166, NWS Shreveport, LA

March 30, 2008Sabine County, San Augustine County, Shelby County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at Mar 30, 2008, 2:12 PM CDT for Sabine County, San Augustine County, Shelby County, Texas. It was in force for 48 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: Mar 30, 2008, 2:12 PM CDT (19:12 UTC)
Expired: Mar 30, 2008, 3:00 PM CDT
In force: 48 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

Counties Sabine County, TX, San Augustine County, TX, Shelby County, TX

The radar

The Shreveport radar (KSHV), 107 km from the middle of the area, began a volume at 19:14 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, 7.2 hours before the alert went out and 112 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: 1366 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 506 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 141 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.4

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 Mar 30, 11:29 AM CDT, 2 hours 43 minutes earlier.

Area forecast discussion, Mar 30, 11:29 AM CDT, 2 hours 43 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
1129 AM CDT SUN MAR 30 2008

.DISCUSSION...
HAVE UPDATED ZONES...ISSUING A FLASH FLOOD WATCH FOR A LARGE
PORTION OF THE CWA. THE HEAVY RAIN WILL CONTINUE INTO THE
AFTERNOON HOURS...AND FLOODING CURRENTLY ONGOING. LOCALIZED
RAINFALL AMOUNTS HAVE NOW EXCEEDED SIX INCHES. MODELS AND GUIDANCE
HAVE NOT HANDLED THIS SMALL SCALE EVENT VERY WELL...SO A LITTLE
BEHIND. IF RAINFALL SHOWS SIGNS OF CONTINUING INTO TONIGHT THE
WATCH WILL BE EXTENDED. SOME ADJUSTMENTS TO TEMPS TO ACCOUNT FOR
LONGER DURATION RAINFALL. NO CHANGES BEYOND FIRST PERIOD AT THIS TIME.

&&

.AVIATION...
LARGE AREA OF SHOWERS AND THUNDERSTORMS CONTINUING THIS MORNING OVER
NORTHEAST TEXAS AND ACTIVITY PULSATING AND MOVING VERY SLOWLY EAST.
OUTSIDE OF MAIN AREA EXPERIENCING MOSTLY MVFR CIGS/VSBSY BUT WITHIN
THE THUNDERSTORM ACTIVITY IFR CIGS/VSBYS EXPECTED TO CONTINUE WELL
INTO MID AFTERNOON. VFR NOT RECOMMENDED OVER ARKLATEX TODAY.  MVFR
CIGS SHOULD GRADUALLY BECOME VFR OVC/BKN040 BY MID AFTERNOON...WITH
REDUCTIONS TO CIGS/VSBYS CONTINUING IN VICINITY OF CONVECTION.
OTKL.. TIGHTENING PRESSURE GRADIENT AHEAD OF THE NEXT RAPID MOVING
SHORTWAVE WILL YIELD INCREASING SRLY WINDS OF 10-15 KTS...WITH GUSTS
TO 25KTS AROUND MID MORNING MONDAY. WHILE CIGS LIFT AGAIN BY MIDDAY
... EXPECT DETERIORATING FLIGHT CONDITIONS DURING THE AFTERNOON AS A
BKN LINE OF STRONG/SVR CONVECTION SPREADS INTO THE AREA. /01/

.PRELIMINARY POINT TEMPS/POPS...
SHV  77  62  79  63 / 100  20  60  70
MLU  79  61  81  64 /  80  20  40  80
DEQ  74  65  73  56 /  90  20  70  70
TXK  75  64  76  60 / 100  20  70  70
ELD  78  61  78  61 / 100  20  60  70
TYR  76  66  76  62 /  60  20  70  70
GGG  76  65  77  61 / 100  20  70  70
LFK  77  65  79  63 /  70  20  50  70

&&

.SHV WATCHES/WARNINGS/ADVISORIES...
AR...FLASH FLOOD WATCH UNTIL 7 PM SUNDAY FOR THE FOLLOWING ZONES:
     COLUMBIA...HEMPSTEAD...HOWARD...LAFAYETTE...LITTLE
     RIVER...MILLER...NEVADA...AND SEVIER.

LA...FLASH FLOOD WATCH UNTIL 7 PM SUNDAY FOR THE FOLLOWING ZONES:
     BIENVILLE...BOSSIER...CADDO...CLAIBORNE...DE
     SOTO...NATCHITOCHES...RED RIVER...SABINE LA...AND WEBSTER.

OK...FLASH FLOOD WATCH UNTIL 7 PM SUNDAY FOR THE FOLLOWING ZONES: AND
     MCCURTAIN.

TX...FLASH FLOOD WATCH UNTIL 7 PM SUNDAY FOR THE FOLLOWING ZONES:
     BOWIE...CAMP...CASS...FRANKLIN...GREGG...HARRISON...MARION...MORRIS...PANOLA...RED
     RIVER...RUSK...SABINE TX...SAN
     AUGUSTINE...SHELBY...TITUS...AND UPSHUR.

&&

14/01

Hazardous weather outlook, Mar 30, 11:55 AM CDT, 2 hours 17 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
1155 AM CDT SUN MAR 30 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>167-311700-
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-
1155 AM CDT SUN MAR 30 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

THUNDERSTORMS WILL BE POSSIBLE ACROSS THE ENTIRE FOUR STATE REGION
THIS AFTERNOON. A FEW STORMS MAY BE SEVERE...MAINLY EAST OF A
LUFKIN TEXAS TO IDABEL OKLAHOMA LINE. THE MAIN SEVERE WEATHER
RISK IS HAIL GREATER THAN THREE QUARTERS OF AN INCH IN DIAMETER.

IN ADDITION...THE STRONGER STORMS WILL BE CAPABLE OF PRODUCING HEAVY
RAINFALL WITHIN A SHORT AMOUNT OF TIME. THIS COULD RESULT IN
ADDITIONAL FLASH FLOODING.

THUNDERSTORMS WILL CONTINUE TO DEVELOP THIS AFTERNOON NEAR A STALLED
WARM FRONT. COLD TEMPERATURES ALOFT WILL RESULT IN STRONG...HAIL
PRODUCING...STORMS. THE WARM FRONT IS EXPECTED TO MOVE NORTHWARD
OUT OF THE AREA LATER TODAY...RESULTING IN A GRADUAL WEAKENING OF
THE CONVECTION.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

UNSETTLED WEATHER IS EXPECTED TO CONTINUE THROUGH MUCH OF THE
UPCOMING WORK WEEK.

SEVERE THUNDERSTORMS WILL BE POSSIBLE FROM LATE MONDAY AFTERNOON
THROUGH TUESDAY MORNING. A SQUALL LINE...AHEAD OF AN APPROACHING
COLD FRONT...MAY BRING THE RISK OF LARGE HAIL...DAMAGING WINDS...
AND ISOLATED TORNADOES TO THE REGION. AT THIS TIME...THE GREATEST
RISK OF SEVERE WEATHER APPEARS TO BE ALONG AND NORTH OF INTERSTATE 30.

STRONG THUNDERSTORMS WILL BE POSSIBLE AGAIN THURSDAY AFTERNOON AND
NIGHT IN ADVANCE OF ANOTHER STORM SYSTEM.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTER GROUPS...HAM RADIO OPERATORS...AND
EMERGENCY MANAGEMENT PERSONNEL...IN SUPPORT OF SEVERE WEATHER
OPERATIONS...MAY BE NECESSARY.

In the hours before

Local storm report, Mar 30, 12:21 PM CDT, 1 hour 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1221 PM CDT SUN MAR 30 2008

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

1140 AM     HAIL             CENTER                  31.79N 94.18W
03/30/2008  E0.75 INCH       SHELBY             TX   LAW ENFORCEMENT

1145 AM     HAIL             10 N HEMPHILL           31.49N 93.85W
03/30/2008  E0.75 INCH       SABINE             TX   LAW ENFORCEMENT

&&

03

Local storm report, Mar 30, 12:25 PM CDT, 1 hour 47 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1225 PM CDT SUN MAR 30 2008

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

1205 AM     FLASH FLOOD      LONGVIEW                32.52N 94.76W
03/30/2008                   GREGG              TX   LAW ENFORCEMENT

            MANY ROADS FLOODED AROUND COUNTY.

&&

03

Local storm report, Mar 30, 12:55 PM CDT, 1 hour 17 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE SHREVEPORT LA
1255 PM CDT SUN MAR 30 2008

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

0945 PM     HAIL             HALLSVILLE              32.58N 94.58W
03/29/2008  M1.00 INCH       HARRISON           TX   NWS EMPLOYEE

            HAIL COVERING GROUND...LASTED 15 MINS

&&

14

Local storm report, Mar 30, 1:05 PM CDT, 1 hour 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
105 PM CDT SUN MAR 30 2008

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

1215 PM     FLASH FLOOD      5 N HALLSVILLE          32.58N 94.58W
03/30/2008                   HARRISON           TX   NWS EMPLOYEE

            PAGE CREEK FLOWING OUT OF BANKS

&&

14

Local storm report, Mar 30, 1:30 PM CDT, 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
130 PM CDT SUN MAR 30 2008

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

0122 PM     FLASH FLOOD      5 N HEMPHILL            31.41N 93.85W
03/30/2008                   SABINE             TX   LAW ENFORCEMENT

            MANY ROADS UNDER WATER ACROSS THE NORTHERN PART OF THE
            COUNTY.

&&

03

Local storm report, Mar 30, 2:01 PM CDT, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
201 PM CDT SUN MAR 30 2008

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

0112 PM     TSTM WND DMG     5 S MANY                31.49N 93.47W
03/30/2008                   SABINE             LA   LAW ENFORCEMENT

            SOME TREES DOWN TO THE SOUTH OF MANY.

0155 PM     FLASH FLOOD      MANY                    31.57N 93.47W
03/30/2008                   SABINE             LA   LAW ENFORCEMENT

            NUMEROUS ROAD FLOODED THROUGHOUT THE PARISH.

&&

03

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 29, 7:22 PM CDT	Severe Thunderstorm Warning	SHV	Cherokee	38 min
Mar 29, 7:57 PM CDT	Severe Thunderstorm Warning	SHV	Cherokee, Nacogdoches, Rusk	48 min
Mar 29, 8:03 PM CDT	Severe Thunderstorm Warning	SHV	Cherokee, Smith	57 min
Mar 29, 8:37 PM CDT	Severe Thunderstorm Warning	SHV	Cherokee, Rusk, Smith	38 min
Mar 29, 8:44 PM CDT	Severe Thunderstorm Warning	SHV	Gregg, Rusk, Smith	46 min
Mar 29, 9:10 PM CDT	Severe Thunderstorm Warning	SHV	Gregg, Harrison, Panola, Rusk, Smith, Upshur	65 min
Mar 29, 9:33 PM CDT	Flash Flood Warning	SHV	Gregg, Harrison	3 hr
Mar 29, 10:04 PM CDT	Severe Thunderstorm Warning	SHV	Harrison, Marion	26 min
Mar 29, 10:27 PM CDT	Severe Thunderstorm Warning	SHV	Cass, Marion	33 min
Mar 29, 10:37 PM CDT	Severe Thunderstorm Warning	SHV	Franklin, Titus	23 min
Mar 29, 10:47 PM CDT	Severe Thunderstorm Warning	SHV	Camp, Morris, Titus	28 min
Mar 29, 10:55 PM CDT	Severe Thunderstorm Warning	SHV	Cass	50 min
Mar 29, 11:00 PM CDT	Severe Thunderstorm Warning	SHV	Gregg, Upshur	30 min
Mar 29, 11:03 PM CDT	Severe Thunderstorm Warning	SHV	Bowie, Morris, Red River, Titus	42 min
Mar 29, 11:08 PM CDT	Severe Thunderstorm Warning	SHV	Cass, Morris, Titus	52 min
Mar 29, 11:35 PM CDT	Severe Thunderstorm Warning	SHV	Bowie	40 min
Mar 29, 11:41 PM CDT	Severe Thunderstorm Warning	SHV	Bowie, Cass, Morris	49 min
Mar 30, 12:47 AM CDT	Severe Thunderstorm Warning	SHV	Franklin, Red River	58 min
Mar 30, 1:20 AM CDT	Severe Thunderstorm Warning	SHV	Franklin, Red River, Titus	55 min
Mar 30, 2:31 AM CDT	Severe Thunderstorm Warning	SHV	Franklin, Red River, Titus	44 min
Mar 30, 5:17 AM CDT	Severe Thunderstorm Warning	SHV	Gregg, Harrison, Rusk, Smith	58 min
Mar 30, 5:43 AM CDT	Severe Thunderstorm Warning	SHV	Smith, Upshur, Wood	62 min
Mar 30, 6:04 AM CDT	Severe Thunderstorm Warning	SHV	Camp, Upshur, Wood	56 min
Mar 30, 6:13 AM CDT	Severe Thunderstorm Warning	SHV	Gregg, Harrison, Upshur	62 min
Mar 30, 6:20 AM CDT	Severe Thunderstorm Warning	SHV	Gregg, Smith	55 min
Mar 30, 7:14 AM CDT	Severe Thunderstorm Warning	SHV	Gregg, Harrison	61 min
Mar 30, 7:27 AM CDT	Severe Thunderstorm Warning	SHV	Wood	33 min
Mar 30, 7:58 AM CDT	Severe Thunderstorm Warning	SHV	Harrison, Panola	62 min
Mar 30, 8:33 AM CDT	Severe Thunderstorm Warning	SHV	Sabine, San Augustine, Shelby	57 min
Mar 30, 8:44 AM CDT	Severe Thunderstorm Warning	SHV	Franklin, Red River, Titus	61 min
Mar 30, 8:50 AM CDT	Flash Flood Warning	SHV	Gregg, Harrison, Panola	3 hr
Mar 30, 9:19 AM CDT	Flash Flood Warning	SHV	Sabine, San Augustine, Shelby	4 hr
Mar 30, 10:21 AM CDT	Severe Thunderstorm Warning	SHV	Sabine, San Augustine, Shelby	54 min
Mar 30, 11:03 AM CDT	River Flood Warning	SHV	Gregg, Harrison, Panola, Rusk	11 days
Mar 30, 11:13 AM CDT	Severe Thunderstorm Warning	SHV	Sabine, Shelby	62 min
Mar 30, 11:39 AM CDT	Severe Thunderstorm Warning	SHV	Panola, Shelby	66 min
Mar 30, 11:44 AM CDT	Flash Flood Watch	SHV	Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 15 more	41 hr
Mar 30, 11:48 AM CDT	Flash Flood Warning	SHV	Gregg, Harrison, Marion, Panola, Rusk, Upshur	3 hr
Mar 30, 11:55 AM CDT	Severe Thunderstorm Warning	SHV	Angelina, Nacogdoches, Sabine, San Augustine	50 min
Mar 30, 12:23 PM CDT	Severe Thunderstorm Warning	SHV	Sabine, San Augustine	52 min
Mar 30, 1:21 PM CDT	Flash Flood Warning	SHV	Sabine, Shelby	3 hr
Mar 30, 1:32 PM CDT	Severe Thunderstorm Warning	SHV	Sabine, San Augustine	28 min
Mar 30, 1:44 PM CDT	Severe Thunderstorm Warning	SHV	Cherokee	46 min
Mar 30, 2:00 PM CDT	River Flood Warning	SHV	Sabine, San Augustine	43 hr
Mar 30, 2:26 PM CDT	Flash Flood Warning	SHV	San Augustine	3 hr
Mar 30, 2:59 PM CDT	Severe Thunderstorm Warning	SHV	Sabine, San Augustine, Shelby	46 min
Mar 30, 3:40 PM CDT	Tornado Warning	SHV	Sabine	35 min
Mar 30, 4:09 PM CDT	Flash Flood Warning	SHV	Sabine, Shelby	2 hr
Mar 30, 4:20 PM CDT	Tornado Warning	SHV	Sabine	40 min
Mar 30, 4:29 PM CDT	Severe Thunderstorm Warning	SHV	Sabine, San Augustine	46 min
Mar 30, 5:18 PM CDT	Severe Thunderstorm Warning	SHV	Sabine	42 min
Mar 30, 5:22 PM CDT	Severe Thunderstorm Warning	SHV	Sabine	38 min
Mar 30, 5:59 PM CDT	Flash Flood Warning	SHV	Sabine	3 hr
Mar 30, 6:27 PM CDT	River Flood Warning	SHV	Nacogdoches, Panola, Rusk, San Augustine, Shelby	67 hr
Mar 30, 4:00 PM CDT	Severe Thunderstorm Warning	SHV	Sabine	45 min
Mar 30, 5:07 PM CDT	Tornado Warning	SHV	Sabine	38 min
Mar 30, 5:26 PM CDT	Tornado Warning	SHV	Sabine	34 min
Mar 30, 5:55 PM CDT	Tornado Warning	SHV	Natchitoches, Sabine	50 min
Mar 30, 6:12 PM CDT	Tornado Warning	SHV	Natchitoches, Winn	48 min
Mar 30, 6:45 PM CDT	Severe Thunderstorm Warning	SHV	Grant, Natchitoches	45 min
Mar 29, 10:42 PM CDT	Severe Thunderstorm Warning	SHV	Little River, Sevier	33 min
Mar 29, 11:56 PM CDT	Severe Thunderstorm Warning	SHV	Howard, Little River, Sevier	49 min
Mar 30, 12:10 AM CDT	Severe Thunderstorm Warning	SHV	Hempstead, Little River, Miller	65 min
Mar 30, 12:57 AM CDT	Severe Thunderstorm Warning	SHV	Sevier	63 min
Mar 30, 1:03 AM CDT	Severe Thunderstorm Warning	SHV	Hempstead, Nevada	57 min
Mar 30, 2:01 AM CDT	Severe Thunderstorm Warning	SHV	Howard, Sevier	59 min

Nearby

Severe Thunderstorm Warnings in Texas, 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.