Alert archive / Louisiana / Flash Flood Warnings in 2023

Flash Flood Warning 11, NWS Shreveport, LA

January 2, 2023Claiborne Parish, Webster Parish, Louisiana; Columbia County, Union County, Arkansas

NWS Shreveport, LA issued this flash flood warning at Jan 2, 2023, 11:24 PM CST for Claiborne Parish, Webster Parish, Louisiana; Columbia County, Union County, Arkansas. It was in force for 3 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: Jan 2, 2023, 11:24 PM CST (05:24 UTC)
Expired: Jan 3, 2023, 2:30 AM CST
In force: 3 hr
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Flood severity: None

Counties Columbia County, AR, Union County, AR, Claiborne Parish, LA, Webster Parish, LA

The radar

The Shreveport radar (KSHV), 95 km from the middle of the area, began a volume at 05:24 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 00:00Z, 5.4 hours before the alert went out and 87 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: 396 J/kg
Mixed-layer CIN: -135 J/kg
Mixed-layer LCL: 715 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 357 m²/s²
0-3 km storm-relative helicity: 446 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.1

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 Jan 2, 9:19 PM CST, 2 hours 5 minutes earlier.

Area forecast discussion, Jan 2, 9:19 PM CST, 2 hours 5 minutes before

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Hazardous weather outlook, Jan 2, 12:18 PM CST, 11 hours 6 minutes before

Hazardous Weather Outlook
National Weather Service Shreveport LA
1218 PM CST Mon Jan 2 2023

OKZ077-TXZ096-108>111-124-125-136-137-149-150-031200-
McCurtain-Red River-Franklin-Titus-Camp-Morris-Wood-Upshur-Smith-
Gregg-Cherokee-Rusk-
1218 PM CST Mon Jan 2 2023

This Hazardous Weather Outlook is for southeast Oklahoma and
northeast Texas.

.DAY ONE...This afternoon and tonight.

Multiple rounds of thunderstorms are expected this afternoon and into
the overnight hours. Some of these storms could be severe, especially
from late this afternoon into early Tuesday morning. Tornadoes,
damaging winds, and large hail will be possible. Thunderstorms are
expected to develop as discrete supercells and eventually congeal
into a linear complex. Given the strongly sheared environment, a few
of these tornadoes could be strong. Heavy rain and isolated flash
flooding may also become a concern.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

No hazardous weather is anticipated.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed this afternoon and into
early Tuesday morning.

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-TXZ097-112-126-
138-151>153-165>167-031200-
Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette-
Columbia-Union-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto-
Red River-Bienville-Jackson-Ouachita-Sabine-Natchitoches-Winn-Grant-
Caldwell-La Salle-Bowie-Cass-Marion-Harrison-Panola-Nacogdoches-
Shelby-Angelina-San Augustine-
1218 PM CST Mon Jan 2 2023

...FLOOD WATCH IN EFFECT THROUGH 6 AM CST TUESDAY MORNING...

This Hazardous Weather Outlook is for south central Arkansas,
southwest Arkansas, north central Louisiana, northwest Louisiana,
east Texas and northeast Texas.

.DAY ONE...This afternoon and tonight.

Multiple rounds of thunderstorms are expected this afternoon and into
the overnight hours. Some of these storms could be severe, especially
from late this afternoon into early Tuesday morning. Tornadoes,
damaging winds, and large hail will be possible. Thunderstorms are
expected to develop as discrete supercells and eventually congeal
into a linear complex. Given the strongly sheared environment, a few
of these tornadoes could be strong. Heavy rain and isolated flash
flooding may also become a concern where training thunderstorms
occur. In these areas, widespread 1 to 2 inches of rainfall is
expected, with locally higher amounts of 3 inches or more. Therefore,
a Flood Watch is in effect through Tuesday morning.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Lingering showers and thunders will be possible in our eastern zones
as the line exits the region. A few of these may be strong to
severe. Once this line leaves the area in the late morning hours, no
additional hazardous weather threat is expected.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed late this afternoon through
Tuesday morning.

09

In the hours before

Local storm report, Jan 2, 10:38 PM CST, 46 minutes before

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Local storm report, Jan 2, 10:39 PM CST, 45 minutes before

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Local storm report, Jan 2, 10:41 PM CST, 43 minutes before

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Local storm report, Jan 2, 10:46 PM CST, 38 minutes before

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Local storm report, Jan 2, 10:49 PM CST, 35 minutes before

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Local storm report, Jan 2, 11:22 PM CST, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1122 PM CST MON JAN 2 2023

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

1113 PM     FLASH FLOOD      6 ESE STONEWALL         32.24N 93.72W
01/02/2023                   DE SOTO            LA   LAW ENFORCEMENT

            FLOODING ON RED BLUFF ROAD EAST OF I-49.
            WATER IS ABOUT HALFWAY UP ON THE VEHICLE
            TIRES.

&&

16

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 2, 7:50 PM CST	Flash Flood Warning	SHV	Panola, Shelby	5 hr
Jan 2, 9:03 PM CST	Flash Flood Warning	SHV	Harrison, Panola, Shelby	3 hr
Jan 3, 1:41 AM CST	Special Weather Statement	SHV	Cherokee	34 min
Jan 3, 2:01 AM CST	Severe Thunderstorm Warning	SHV	Cherokee, Nacogdoches, Rusk	29 min
Jan 3, 2:27 AM CST	Severe Thunderstorm Warning	SHV	Panola, Rusk, Shelby	48 min
Jan 3, 3:10 AM CST	Severe Thunderstorm Warning	SHV	Harrison, Panola	50 min
Jan 3, 9:34 AM CST	River Flood Warning	SHV	Nacogdoches, Rusk, San Augustine, Shelby	58 hr
Jan 3, 9:38 AM CST	River Flood Warning	SHV	Sabine, San Augustine	25 hr
Jan 2, 6:33 PM CST	Tornado Warning	SHV	Jackson, Ouachita, Union	42 min
Jan 2, 6:53 PM CST	Tornado Warning	SHV	Ouachita	52 min
Jan 2, 7:22 PM CST	Flash Flood Warning Considerable damage threat	SHV	Caldwell, Jackson, Ouachita, Union	3 hr
Jan 2, 7:45 PM CST	Severe Thunderstorm Warning	SHV	Ouachita	30 min
Jan 2, 7:52 PM CST	Special Weather Statement	SHV	Claiborne, Webster	38 min
Jan 2, 7:55 PM CST	Flash Flood Warning	SHV	Bossier, Caddo, Webster	7 hr
Jan 2, 7:56 PM CST	Severe Thunderstorm Warning	SHV	Bienville, Bossier, Caddo, Claiborne, Webster	38 min
Jan 2, 8:27 PM CST	Severe Thunderstorm Warning	SHV	Claiborne, Lincoln, Union	48 min
Jan 2, 8:47 PM CST	Tornado Warning	SHV	Union	43 min
Jan 2, 8:49 PM CST	Flash Flood Warning	SHV	Bienville, Claiborne, Union	5 hr
Jan 3, 3:52 AM CST	Severe Thunderstorm Warning	SHV	Bossier, Caddo, De Soto	38 min
Jan 3, 5:55 AM CST	Tornado Warning	SHV	Union	10 min
Jan 3, 8:14 AM CST	Special Weather Statement	SHV	LaSalle	31 min
Jan 3, 9:44 AM CST	River Flood Warning	SHV	Bienville, Bossier, Webster	9 days
Jan 3, 9:52 AM CST	River Flood Warning	SHV	Bossier, Webster	18 days
Jan 3, 2:01 PM CST	Special Weather Statement	SHV	LaSalle	29 min
Jan 3, 2:32 PM CST	Special Weather Statement	SHV	LaSalle	28 min
Jan 2, 8:38 PM CST	Tornado Warning	SHV	Howard, Little River, Sevier	52 min
Jan 2, 10:17 PM CST	Special Weather Statement	SHV	Union	58 min
Jan 3, 1:55 AM CST	Flash Flood Warning	SHV	Columbia, Nevada, Union	3 hr

Nearby

Flash Flood Warnings in Louisiana, 2023 Flash Flood Warnings in Arkansas, 2023 Every flash flood warning in 2023

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.