Alert archive / Louisiana / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 202, NWS Shreveport, LA

May 18, 2019De Soto Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at May 18, 2019, 10:28 PM CDT for De Soto Parish, Louisiana. It was in force for 62 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 18, 2019, 10:28 PM CDT (03:28 UTC)
Expired
May 18, 2019, 11:30 PM CDT
In force
62 min
Issued by
NWS Shreveport, LA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County De Soto Parish, LA

The radar

The Shreveport radar (KSHV), 45 km from the middle of the area, began a volume at 03:32 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 watch it was issued in

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

IssuedProductOfficeLasted
May 18, 7:08 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

Shreveport, LA (KBAD), launched 00:00Z, 3.5 hours before the alert went out and 47 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-pSkew-T log-p diagram, Shreveport, LA at 00:00Z on 2019-05-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1844 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 00:00Z on 2019-05-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 132 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1844 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
1157 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
132 m²/s²
0-3 km storm-relative helicity
197 m²/s²
Significant tornado parameter
1.5
Supercell composite
10.6

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 18, 10:05 PM CDT, 23 minutes earlier.

Area forecast discussion, May 18, 10:05 PM CDT, 23 minutes before
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Hazardous weather outlook, May 18, 11:50 AM CDT, 10 hours 38 minutes before
Hazardous Weather Outlook
National Weather Service Shreveport LA
1150 AM CDT Sat May 18 2019

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-
TXZ096-097-108>112-124>126-136>138-149>153-165>167-191700-
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-McCurtain-Bowie-Franklin-Titus-Camp-
Morris-Cass-Wood-Upshur-Marion-Smith-Gregg-Harrison-Cherokee-Rusk-
Panola-Nacogdoches-Shelby-Angelina-San Augustine-
1150 AM CDT Sat May 18 2019

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...

Strong to severe thunderstorms will gradually increase in
coverage across portions of east Texas and southeast Oklahoma
during the early afternoon hours and points eastward through the
late afternoon and evening hours. Damaging winds are expected to
be the primary risk with large hail and isolated tornadoes also
possible as a squall line moves across the region. Locally heavy
rainfall amounting to a few inches within an hours time may also
lead to mainly minor isolated flooding issues. Severe weather
risk to diminish late tonight as the bulk of thunderstorms
shift east and instability wanes.

.DAYS TWO THROUGH SEVEN...Sunday through Friday...

Widely scattered thunderstorms remain possible during day Sunday
and also during the day Monday. However, the threat for severe
thunderstorms over this time period should be low.

The risk for strong to severe storms will return to at least the
northwestern half of the Four State Region on Tuesday as another
potent disturbance brushes by the region. Initial thinking is
damaging winds will be the primary risk with this activity,
although hail and a few tornadoes cannot yet be ruled out,
especially across portions of the Arklatex.

.SPOTTER INFORMATION STATEMENT...

Activation of emergency management personnel, amateur radio
operators, and storm spotters will likely be needed this
afternoon into this evening.

In the hours before

Local storm report, May 18, 9:27 PM CDT, 1 hour 1 minute before
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Local storm report, May 18, 10:02 PM CDT, 26 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1002 PM CDT SAT MAY 18 2019

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

0955 PM     FLASH FLOOD      1 E CUSHING             31.81N 94.82W
05/18/2019                   NACOGDOCHES        TX   EMERGENCY MNGR

            WATER OVER THE ROAD ON SH 204. ROAD CLOSED.

&&

AS
Local storm report, May 18, 10:04 PM CDT, 24 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1004 PM CDT SAT MAY 18 2019

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

1000 PM     FLASH FLOOD      4 S CUSHING             31.76N 94.85W
05/18/2019                   NACOGDOCHES        TX   EMERGENCY MNGR

            WATER OVER ROAD AND ROAD CLOSED. FM 225 JUST
            SOUTH OF FM 343.

&&

AS
Local storm report, May 18, 10:06 PM CDT, 22 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1006 PM CDT SAT MAY 18 2019

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

0910 PM     TSTM WND DMG     2 S LEWISVILLE          33.33N 93.58W
05/18/2019                   LAFAYETTE          AR   EMERGENCY MNGR

            TREE ACROSS AR HWY 29 DAMAGING A VEHICLE.

&&

AS
Local storm report, May 18, 10:08 PM CDT, 20 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1008 PM CDT SAT MAY 18 2019

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

0839 PM     TSTM WND DMG     5 S CUSHING             31.74N 94.85W
05/18/2019                   NACOGDOCHES        TX   EMERGENCY MNGR

            TREES DOWN.

&&

AS
Local storm report, May 18, 10:21 PM CDT, 7 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1021 PM CDT SAT MAY 18 2019

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

1015 PM     FLASH FLOOD      REKLAW                  31.86N 94.99W
05/18/2019                   CHEROKEE           TX   EMERGENCY MNGR

            HWY 84 CLOSED DUE TO HIGH WATER. HIGH WATER
            RESCUE REQUESTED FOR STRANDED VEHICLE AT
            WHITEOAK RD.

&&

AS

The office that day

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

IssuedProductOfficeCountiesLasted
May 18, 7:08 PM CDTSevere Thunderstorm WarningSHVCherokee, Smith67 min
May 18, 7:19 PM CDTTornado WarningSHVHarrison, Marion41 min
May 18, 7:24 PM CDTTornado WarningSHVCherokee51 min
May 18, 7:41 PM CDTSevere Thunderstorm WarningSHVHarrison, Marion64 min
May 18, 8:03 PM CDTSevere Thunderstorm WarningSHVCherokee, Nacogdoches, Rusk57 min
May 18, 8:05 PM CDTTornado WarningSHVCherokee, Rusk40 min
May 18, 8:17 PM CDTFlash Flood WarningSHVCherokee, Rusk4 hr
May 18, 8:43 PM CDTSevere Thunderstorm WarningSHVNacogdoches, Panola, Rusk, Shelby62 min
May 18, 9:11 PM CDTSevere Thunderstorm WarningSHVCherokee49 min
May 18, 9:32 PM CDTFlash Flood WarningSHVAngelina, Cherokee, Nacogdoches, Panola, Shelby3 hr
May 18, 9:39 PM CDTSevere Thunderstorm WarningSHVNacogdoches, Panola, Rusk, Shelby66 min
May 18, 9:51 PM CDTRiver Flood WarningSHVNacogdoches, Rusk60 hr
May 18, 9:52 PM CDTRiver Flood WarningSHVCass, Marion4 days
May 18, 9:53 PM CDTRiver Flood WarningSHVGregg18 hr
May 18, 9:54 PM CDTRiver Flood WarningSHVFranklin, Morris, Titus4 days
May 18, 9:56 PM CDTSevere Thunderstorm WarningSHVCherokee, Nacogdoches, Rusk64 min
May 18, 10:56 PM CDTSpecial Weather StatementSHVNacogdoches, Panola49 min
May 18, 11:37 PM CDTSevere Thunderstorm WarningSHVPanola, San Augustine, Shelby38 min
May 19, 12:15 AM CDTSevere Thunderstorm WarningSHVSabine, Shelby60 min
May 19, 12:21 AM CDTFlash Flood WarningSHVShelby3 hr
May 19, 12:30 AM CDTFlash Flood WarningSHVAngelina, Cherokee, Nacogdoches, Sabine, San Augustine, Shelby3 hr
May 19, 12:43 AM CDTSevere Thunderstorm WarningSHVAngelina, Nacogdoches, Sabine, San Augustine62 min
May 19, 12:56 AM CDTAreal Flood WarningSHVCherokee, Nacogdoches, Rusk, Shelby6 hr
May 19, 1:14 AM CDTSevere Thunderstorm WarningSHVSabine61 min
May 19, 1:34 AM CDTFlash Flood WarningSHVSabine, San Augustine, Shelby3 hr
May 19, 1:48 AM CDTSpecial Weather StatementSHVAngelina, Sabine, San Augustine42 min
May 19, 3:54 PM CDTRiver Flood WarningSHVSabine, San Augustine57 hr
May 19, 6:59 PM CDTSpecial Weather StatementSHVSan Augustine31 min
May 18, 7:49 PM CDTSpecial Weather StatementSHVCaddo41 min
May 18, 8:29 PM CDTSevere Thunderstorm WarningSHVBossier, Claiborne, Union, Webster46 min
May 18, 11:09 PM CDTSevere Thunderstorm WarningSHVBienville, Bossier, De Soto, Natchitoches, Red River, Sabine and 1 more66 min
May 19, 12:34 AM CDTSevere Thunderstorm WarningSHVBienville, Claiborne, Jackson, Lincoln, Natchitoches, Red River and 2 more56 min
May 19, 1:26 AM CDTFlash Flood WarningSHVBienville, Natchitoches, Red River, Winn3 hr
May 19, 1:30 AM CDTSpecial Weather StatementSHVUnion45 min
May 19, 2:02 AM CDTTornado WarningSHVNatchitoches28 min
May 19, 2:09 AM CDTSevere Thunderstorm WarningSHVCaldwell, Grant, LaSalle, Lincoln, Natchitoches, Ouachita and 2 more66 min
May 19, 2:52 AM CDTFlash Flood WarningSHVGrant, Natchitoches, Winn2 hr
May 19, 2:51 PM CDTSpecial Weather StatementSHVNatchitoches39 min
May 19, 6:39 PM CDTSpecial Weather StatementSHVCaddo36 min
May 18, 11:18 PM CDTSevere Thunderstorm WarningSHVHempstead, Howard, Little River42 min
May 18, 11:46 PM CDTSevere Thunderstorm WarningSHVHempstead, Nevada29 min
May 19, 6:37 PM CDTSpecial Weather StatementSHVUnion23 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2019Every severe thunderstorm warning in 2019

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.