Alert archive / Louisiana / Flash Flood Warnings in 2009

Flash Flood Warning 12, NWS Shreveport, LA

May 3, 20095 parishes in Louisiana

NWS Shreveport, LA issued this flash flood warning at May 3, 2009, 7:57 AM CDT for 5 parishes in Louisiana. It was in force for 4 hr. 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 3, 2009, 7:57 AM CDT (12:57 UTC)
Expired: May 3, 2009, 12:00 PM CDT
In force: 4 hr
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Flood severity: None

Counties Bienville Parish, LA, Claiborne Parish, LA, Lincoln Parish, LA, Red River Parish, LA, Webster Parish, LA

The radar

The Shreveport radar (KSHV), 72 km from the middle of the area, began a volume at 12:57 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

Lake Charles Mun, LA (KLCH), launched 12:00Z, 1.0 hours before the alert went out and 267 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: 2267 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 533 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 182 m²/s²
0-3 km storm-relative helicity: 308 m²/s²
Significant tornado parameter: 3.1
Supercell composite: 14.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at May 3, 5:15 AM CDT, 2 hours 42 minutes earlier.

Area forecast discussion, May 3, 5:15 AM CDT, 2 hours 42 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
515 AM CDT SUN MAY 3 2009

.DISCUSSION...

WILL CONTINUE TO CARRY A FLASH FLOOD WATCH FOR THE ENTIRE FOUR
STATE REGION UNTIL 7 PM CDT THIS EVENING. ADDITIONAL RAINFALL...
HEAVY AT TIMES...WILL OCCUR OVER MUCH OF THE AREA AS A SURFACE LOW
PRESSURE SYSTEM OVER NORTHEAST TEXAS AND ANOTHER OVER SOUTHEAST OKLAHOMA
ALONG WITH HIGH PRESSURE OFF TO THE EAST PULL IN A MOIST AND
UNSTABLE AIRMASS. A COLD FRONT TRAILING SOUTHWEST FROM THE LOW
WILL MOVE EAST LATER DURING THE DAY AS AN UPPER TROUGH MOVING
ACROSS NORTH TEXAS AND OKLAHOMA. THIS WILL RESULT IN LOCALLY
HEAVY RAINFALL AND THERE WILL BE A CONTINUED THREAT FOR SEVERE
THUNDERSTORMS PRODUCING LARGE HAIL AND HIGH AND DAMAGING WINDS.
WILL BE ISSUING A NEW SEVERE THUNDERSTORM WATCH TO REPLACE THE
PREVIOUS THAT COVERS ALL OF NORTHWEST AND NORTH CENTRAL LOUISIANA
AND MUCH OF NORTHEAST TEXAS. RAINS WILL TAPER OFF OVERNIGHT FROM
WEST TO EAST AS THE UPPER TROUGH SHIFTS ACROSS THE MISSISSIPPI RIVER...
AND THE FRONTAL BOUNDARY SHIFTS SOUTH OUT OF THE AREA. THERE WILL
BE A VERY BRIEF PERIOD OF NO CHANCES FOR SHOWERS AND THUNDERSTORMS
MONDAY AND FOR MONDAY NIGHT...BUT WITH A SLIGHT NORTHWEST
FLOW/NEARLY ZONAL PATTERN ACROSS THE LOWER HALF OF THE COUNTRY
UPPER DISTURBANCES MOVING THROUGH THE FLOW WILL PRODUCE SHOWERS
AND THUNDERSTORMS FOR THE AREA THROUGH THE WEEK. /06/

&&

.AVIATION...

WIDESPREAD SHOWERS AND THUNDERSTORMS THIS MORNING WILL CONTINUE TO
MAKE STEADY PROGRESS EASTWARD WITH CEILINGS HOVERING BETWEEN IFR AND
MVFR IN AND OUT OF STORMS. NEW CONVECTION FIRING NEAR THE I-35
CORRIDOR ACROSS CENTRAL AND NORTHERN TEXAS EARLY THIS MORNING WILL
KEEP ALL TERMINALS IN AND OUT OF THUNDER THROUGH AT LEAST MUCH OF
THE MORNING. CONVECTION SHOULD BEGIN ENDING FROM WEST TO EAST BY
MIDDAY WITH THE PASSAGE OF A FRONTAL SYSTEM. EXPECT WINDS TO SHIFT
TO THE NORTHWEST BEHIND THE FRONT. NOT CONFIDENT ON THE DEVELOPMENT
OF LOW CLOUDS BEHIND THE FRONT TODAY INTO TONIGHT AS GUIDANCE
SUGGESTS SO WILL CONTINUE TO MONITOR THIS TREND AND MAY NEED TO
MENTION MVFR CEILINGS ACROSS THE REGION TONIGHT. /13/

&&

.PRELIMINARY POINT TEMPS/POPS...
SHV  77  59  78  60  82 /  90  40  10  10  20
MLU  79  62  76  57  83 /  90  50  20  10  20
DEQ  68  53  74  57  77 /  70  30  10  20  40
TXK  72  55  75  57  80 /  80  40  10  20  40
ELD  75  57  75  57  80 /  90  40  20  10  30
TYR  75  57  77  60  84 /  80  40  10  10  20
GGG  76  58  78  60  83 /  80  40  10  10  10
LFK  80  62  81  63  86 /  90  40  10  10  10

&&

.SHV WATCHES/WARNINGS/ADVISORIES...
AR...FLASH FLOOD WATCH THROUGH THIS EVENING FOR THE FOLLOWING ZONES:
     ARZ050-051-059>061-070>073.

LA...FLASH FLOOD WATCH THROUGH THIS EVENING FOR THE FOLLOWING ZONES:
     LAZ001>006-010>014-017>022.

OK...FLASH FLOOD WATCH THROUGH THIS EVENING FOR THE FOLLOWING ZONES:
     OKZ077.

TX...FLASH FLOOD WATCH THROUGH THIS EVENING FOR THE FOLLOWING ZONES:
     TXZ126-136>138-149>153-165>167.

     FLASH FLOOD WATCH THROUGH THIS EVENING FOR THE FOLLOWING ZONES:
     TXZ096-097-108>112-124-125.

&&

06/13

Hazardous weather outlook, May 3, 7:11 AM CDT, 46 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
711 AM CDT SUN MAY 3 2009

ARZ050-051-059>061-070>073-OKZ077-TXZ096-097-108>112-124-125-
031800-
SEVIER-HOWARD-LITTLE RIVER-HEMPSTEAD-NEVADA-MILLER-LAFAYETTE-
COLUMBIA-UNION AR-MCCURTAIN-RED RIVER-BOWIE-FRANKLIN-TITUS-CAMP-
MORRIS-CASS-WOOD-UPSHUR-
711 AM CDT SUN MAY 3 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
AND SOUTHWEST ARKANSAS...SOUTHEAST OKLAHOMA...AND NORTHEAST
TEXAS GENERALLY NORTH OF AN EL DORADO ARKANSAS TO
LINDEN...GILMER...AQNDD MINEOLA TEXAS LINE.

.DAY ONE...TODAY AND TONIGHT...

STRONG TO SEVERE THUNDERSTORMS WILL BE PRODUCING LOCALLY HEAVY
RAINFALL OVER LOCATIONS THAT HAVE ALREADY HAD FROM 3 TO 6 INCHES
OF RAIN THAT SATURATED THE SOILS AND RESULTED IN WIDESPREAD
FLOODING. ADDITIONAL HEAVY RAINS WILL ADD TO THE SITUATION.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

SHOWERS AND THUNDERSTORMS WILL BE TAPERING OFF ON MONDAY AND
MONDAY NIGHT...BUT LOOK TO RETURN AROUND MID WEEK. ADDITIONAL
MODERATE TO HEAVY RAINFALL WILL BE POSSIBLE ALONG WITH STRONG
TO SEVERE THUNDERSTORMS INTO LATE WEEK.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF EMERGENCY MANAGERS...HAM RADIO OPERATORS...AND STORM
SPOTTERS MAY BE REQUIRED TODAY BUT SHOULD NOT BE NEEDED FOR SEVERE
WEATHER TONIGHT.

LAZ001>006-010>014-017>022-TXZ126-136>138-149>153-165>167-031800-
CADDO-BOSSIER-WEBSTER-CLAIBORNE-LINCOLN-UNION LA-DE SOTO-
RED RIVER-BIENVILLE-JACKSON-OUACHITA-SABINE LA-NATCHITOCHES-WINN-
GRANT-CALDWELL-LA SALLE-MARION-SMITH-GREGG-HARRISON-CHEROKEE-RUSK-
PANOLA-NACOGDOCHES-SHELBY-ANGELINA-SAN AUGUSTINE-SABINE TX-
711 AM CDT SUN MAY 3 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST TEXAS AND
NORTHEAST TEXAS...AND NORTHWEST AND NORTH CENTRAL LOUISIANA.

.DAY ONE...TODAY AND TONIGHT...

STRONG TO SEVERE THUNDERSTORMS WILL BE PRODUCING LOCALLY HEAVY
RAINFALL OVER LOCATIONS THAT HAVE ALREADY HAD FROM 1 TO 2 INCHES
OF RAIN THAT HAS MOISTENED THE SOILS. ADDITIONAL HEAVY RAINS WILL
QUICKLY SATURATE THE SOILS RESULTING IN RAPID WATER RUNOFF AND
FLASH FLOODING. SEVERE THUNDERSTORMS WILL BE CAPABLE OF PRODUCING
HIGH AND DAMAGING WINDS TO NEAR 60 TO 70 MPH IN BOWING
LINES...DOWNING NUMEROUS TREES AND SOME POWER LINES.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

SHOWERS AND THUNDERSTORMS WILL BE TAPERING OFF ON MONDAY AND
MONDAY NIGHT...BUT LOOK TO RETURN AROUND MID WEEK. ADDITIONAL
MODERATE TO HEAVY RAINFALL WILL BE POSSIBLE ALONG WITH STRONG
TO SEVERE THUNDERSTORMS INTO LATE WEEK.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF EMERGENCY MANAGERS...HAM RADIO OPERATORS...AND STORM
SPOTTERS MAY BE REQUIRED TODAY BUT SHOULD NOT BE NEEDED FOR SEVERE
WEATHER TONIGHT.

06

In the hours before

Local storm report, May 3, 5:09 AM CDT, 2 hours 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
509 AM CDT SUN MAY 03 2009

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

0500 AM     FLASH FLOOD      DAINGERFIELD            33.03N 94.72W
05/03/2009                   MORRIS             TX   LAW ENFORCEMENT

            MORRIS COUNTY SHERIFFS OFFICE REPORTS SEVERAL ROADS
            ACROSS THE COUNTY ARE UNDER WATER.

&&

18

Special weather statement, May 3, 6:23 AM CDT, 1 hour 34 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
623 AM CDT SUN MAY 3 2009

TXZ125-126-136>138-150-151-031215-
GREGG-HARRISON-MARION-PANOLA-RUSK-SMITH-UPSHUR-
623 AM CDT SUN MAY 3 2009

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A SIGNIFICANT
WEATHER ALERT...EFFECTIVE UNTIL 715 AM CDT...FOR THE FOLLOWING
COUNTIES...

IN NORTHEAST TEXAS...
     UPSHUR...MARION...HARRISON...SMITH...GREGG...RUSK AND PANOLA...

INCLUDING THE FOLLOWING LOCATIONS...
     BECKVILLE...BEREA...CEDAR SPRINGS...CLARKSVILLE CITY...DIANA...
     EAST MOUNTAIN...GILMER...GLADEWATER...HALLSVILLE...HARLETON...
     JEFFERSON...JOINERVILLE...KILGORE...LIBERTY CITY...LODI...
     LONGVIEW...MARSHALL...NEW LONDON...ORE CITY...OVERTON...TATUM...
     TURNERTOWN...WEST MOUNTAIN...WHITE OAK AND WOODLAWN...

AT 623 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 9 MILES SOUTH OF
PITTSBURG TO EAST MOUNTAIN TO NEW LONDON...OR ALONG A LINE EXTENDING
FROM 9 MILES SOUTH OF PITTSBURG TO WHITE OAK TO 9 MILES SOUTHWEST OF
KILGORE...MOVING EAST AT 45 MPH.

WINDS AROUND 50 MPH ARE EXPECTED WITH THESE STORMS. SHOULD THESE
STORMS INTENSIFY...A SEVERE THUNDERSTORM WARNING WILL BE NEEDED.

15

Local storm report, May 3, 6:55 AM CDT, 1 hour 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
655 AM CDT SUN MAY 03 2009

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

0630 AM     TSTM WND DMG     JACKSONVILLE            31.97N 95.26W
05/03/2009                   CHEROKEE           TX   LAW ENFORCEMENT

            NUMEROUS TREES DOWN ALL ACROSS THE COUNTY.

&&

15

Local storm report, May 3, 7:07 AM CDT, 50 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
707 AM CDT SUN MAY 03 2009

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

0640 AM     TSTM WND DMG     CUSHING                 31.81N 94.84W
05/03/2009                   NACOGDOCHES        TX   LAW ENFORCEMENT

            NACOGDOCHES COUNTY SHERIFFS OFFICE REPORTS TREES DOWN ON
            FM 343 AND FM 1648.

0635 AM     TSTM WND DMG     2 S HENDERSON           32.13N 94.80W
05/03/2009                   RUSK               TX   LAW ENFORCEMENT

            TREES DOWN ON FM 839.

0705 AM     TSTM WND GST     5 SW LUFKIN             31.28N 94.79W
05/03/2009  M62 MPH          ANGELINA           TX   ASOS

            62 MPH GUST MEASURED AT ANGELINA COUNTY AIRPORT.

&&

18

Local storm report, May 3, 7:25 AM CDT, 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
725 AM CDT SUN MAY 03 2009

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

0723 AM     FLASH FLOOD      SHREVEPORT              32.47N 93.80W
05/03/2009                   CADDO              LA   LAW ENFORCEMENT

            POLICE DEPARTMENT REPORTED SEVERAL STREETS FLOODED IN THE
            SHREVEPORT METRO AREA.

&&

03

Local storm report, May 3, 7:30 AM CDT, 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
730 AM CDT SUN MAY 03 2009

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

0725 AM     FLASH FLOOD      8 NE MINEOLA            32.75N 95.39W
05/03/2009                   WOOD               TX   LAW ENFORCEMENT

            SHERIFFS DEPARTMENT REPORTED MANY ROADS FLOODED ACROSS
            WOOD COUNTY.

&&

03

The office that day

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

Issued	Product	Office	Counties	Lasted
May 2, 7:38 PM CDT	Severe Thunderstorm Warning	SHV	Camp, Franklin, Gregg, Smith, Titus, Upshur and 1 more	52 min
May 2, 8:03 PM CDT	Flash Flood Warning	SHV	Bowie, Red River	7 hr
May 2, 8:21 PM CDT	Flash Flood Warning	SHV	Camp, Franklin, Gregg, Red River, Smith, Titus and 2 more	3 hr
May 2, 8:29 PM CDT	Severe Thunderstorm Warning	SHV	Bowie, Camp, Franklin, Gregg, Morris, Red River and 3 more	61 min
May 2, 8:35 PM CDT	Tornado Warning	SHV	Camp, Franklin, Titus, Upshur, Wood	25 min
May 2, 8:50 PM CDT	Severe Thunderstorm Warning	SHV	Bowie, Camp, Cass, Gregg, Harrison, Marion and 3 more	55 min
May 2, 8:56 PM CDT	Tornado Warning	SHV	Camp, Cass, Marion, Morris, Titus, Upshur	49 min
May 2, 9:08 PM CDT	Flash Flood Warning	SHV	Bowie	12 hr
May 2, 11:14 PM CDT	Flash Flood Warning	SHV	Camp, Franklin, Morris, Red River, Titus, Upshur and 1 more	11 hr
May 2, 11:14 PM CDT	Severe Thunderstorm Warning	SHV	Camp, Franklin, Morris, Red River, Titus, Upshur and 1 more	61 min
May 3, 12:10 AM CDT	Severe Thunderstorm Warning	SHV	Smith, Upshur, Wood	65 min
May 3, 12:23 AM CDT	Severe Thunderstorm Warning	SHV	Bowie, Camp, Cass, Marion, Morris, Titus and 1 more	37 min
May 3, 1:01 AM CDT	Severe Thunderstorm Warning	SHV	Bowie, Cass, Harrison, Marion	59 min
May 3, 1:07 AM CDT	Severe Thunderstorm Warning	SHV	Smith	53 min
May 3, 2:40 AM CDT	River Flood Warning	SHV	Cass, Marion	9 days
May 3, 3:50 AM CDT	River Flood Warning	SHV	Smith, Wood	8 days
May 3, 3:50 AM CDT	River Flood Warning	SHV	Wood	6 days
May 3, 6:13 AM CDT	Severe Thunderstorm Warning	SHV	Angelina, Cherokee, Nacogdoches, Rusk	62 min
May 3, 6:52 AM CDT	Severe Thunderstorm Warning	SHV	Angelina, Nacogdoches, Panola, Rusk, Sabine, San Augustine and 1 more	53 min
May 3, 7:44 AM CDT	Severe Thunderstorm Warning	SHV	Sabine, San Augustine	61 min
May 3, 11:08 AM CDT	River Flood Warning	SHV	Upshur, Wood	58 hr
May 3, 11:13 AM CDT	River Flood Warning	SHV	Gregg, Smith, Upshur, Wood	15 days
May 3, 11:50 AM CDT	River Flood Warning	SHV	Camp, Morris, Titus	5 days
May 3, 11:50 AM CDT	River Flood Warning	SHV	Cass, Harrison, Marion	9 days
May 2, 7:04 PM CDT	Severe Thunderstorm Warning	SHV	Union	26 min
May 2, 7:35 PM CDT	Severe Thunderstorm Warning	SHV	Claiborne, Lincoln, Union	55 min
May 2, 8:22 PM CDT	Severe Thunderstorm Warning	SHV	Lincoln, Ouachita, Union	38 min
May 3, 2:34 AM CDT	River Flood Warning	SHV	Webster	21 days
May 3, 5:38 AM CDT	Severe Thunderstorm Warning	SHV	Caldwell, Jackson, Ouachita, Winn	37 min
May 3, 7:18 AM CDT	Flash Flood Warning	SHV	Bossier, Caddo	4 hr
May 3, 7:36 AM CDT	Tornado Warning	SHV	Bienville, Jackson, Lincoln	39 min
May 3, 8:01 AM CDT	Tornado Warning	SHV	Bienville, Jackson	59 min
May 3, 8:43 AM CDT	Severe Thunderstorm Warning	SHV	Caldwell, Grant, LaSalle, Natchitoches, Winn	50 min
May 3, 9:02 AM CDT	Tornado Warning	SHV	Jackson, Ouachita	36 min
May 3, 11:54 AM CDT	River Flood Warning	SHV	Bienville, Bossier, Webster	24 hr
May 3, 4:14 PM CDT	River Flood Warning	SHV	Bossier, Webster	19 hr
May 3, 4:14 PM CDT	River Flood Warning	SHV	Bienville, Bossier, Red River, Webster	42 hr
May 2, 10:16 PM CDT	Flash Flood Warning	SHV	Columbia, Union	8 hr
May 2, 10:23 PM CDT	Flash Flood Warning	SHV	Hempstead, Howard, Nevada, Sevier	4 hr
May 3, 8:42 AM CDT	Flash Flood Warning	SHV	Columbia, Hempstead, Lafayette, Little River, Miller, Nevada	3 hr

Nearby

Flash Flood Warnings in Louisiana, 2009 Every flash flood warning in 2009

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.