Alert archive / Louisiana / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 148, NWS Shreveport, LA

April 25, 2019LaSalle Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Apr 25, 2019, 5:48 AM CDT for LaSalle Parish, Louisiana. It was in force for 42 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: Apr 25, 2019, 5:48 AM CDT (10:48 UTC)
Expired: Apr 25, 2019, 6:30 AM CDT
In force: 42 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County LaSalle Parish, LA

The radar

The Ft Polk radar (KPOE), 97 km from the middle of the area, began a volume at 10:47 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.

Issued	Product	Office	Lasted
Apr 24, 11:52 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Shreveport, LA (KBAD), launched 00:00Z, 10.8 hours before the alert went out and 174 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: 94 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 1094 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 123 m²/s²
0-3 km storm-relative helicity: 240 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

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 Apr 25, 3:47 AM CDT, 2 hours 1 minute earlier.

Area forecast discussion, Apr 25, 3:47 AM CDT, 2 hours 1 minute before

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Hazardous weather outlook, Apr 25, 5:34 AM CDT, 14 minutes before

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In the hours before

Local storm report, Apr 25, 4:02 AM CDT, 1 hour 46 minutes before

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Local storm report, Apr 25, 4:22 AM CDT, 1 hour 26 minutes before

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Special weather statement, Apr 25, 4:47 AM CDT, 1 hour 1 minute before

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Local storm report, Apr 25, 4:52 AM CDT, 56 minutes before

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Local storm report, Apr 25, 4:59 AM CDT, 49 minutes before

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Special weather statement, Apr 25, 5:04 AM CDT, 44 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 24, 7:04 PM CDT	Areal Flood Advisory	SHV	Smith	3 hr
Apr 24, 7:17 PM CDT	Special Weather Statement	SHV	Gregg, Smith, Upshur	43 min
Apr 24, 7:34 PM CDT	Flash Flood Warning	SHV	Smith	116 min
Apr 24, 8:00 PM CDT	Special Weather Statement	SHV	Upshur	60 min
Apr 24, 8:13 PM CDT	Areal Flood Advisory	SHV	Upshur, Wood	2 hr
Apr 24, 8:21 PM CDT	Tornado Warning	SHV	Upshur	18 min
Apr 24, 8:43 PM CDT	Special Weather Statement	SHV	Upshur	47 min
Apr 24, 9:04 PM CDT	Areal Flood Advisory	SHV	Gregg, Upshur	116 min
Apr 24, 9:14 PM CDT	Special Weather Statement	SHV	Gregg	46 min
Apr 24, 9:25 PM CDT	Flash Flood Warning	SHV	Gregg, Smith, Upshur	3 hr
Apr 24, 9:29 PM CDT	Special Weather Statement	SHV	Cherokee	46 min
Apr 24, 9:48 PM CDT	Areal Flood Advisory	SHV	Harrison, Marion	3 hr
Apr 24, 10:02 PM CDT	Areal Flood Advisory	SHV	Angelina, Cherokee, Gregg, Harrison, Nacogdoches, Rusk and 1 more	3 hr
Apr 24, 10:10 PM CDT	Areal Flood Advisory	SHV	Smith, Wood	3 hr
Apr 24, 10:46 PM CDT	Special Weather Statement	SHV	San Augustine	44 min
Apr 24, 10:50 PM CDT	Severe Thunderstorm Warning	SHV	Angelina, Nacogdoches, Sabine, San Augustine, Shelby	40 min
Apr 24, 11:01 PM CDT	Tornado Warning	SHV	Nacogdoches, Sabine, San Augustine, Shelby	29 min
Apr 24, 11:26 PM CDT	Tornado Warning Considerable damage threat	SHV	Sabine, San Augustine, Shelby	34 min
Apr 25, 12:09 AM CDT	Areal Flood Advisory	SHV	Angelina, Nacogdoches, Sabine, San Augustine, Shelby	3 hr
Apr 25, 12:17 AM CDT	Flash Flood Warning	SHV	Sabine, San Augustine, Shelby	3 hr
Apr 25, 12:37 AM CDT	Severe Thunderstorm Warning	SHV	Sabine, San Augustine, Shelby	38 min
Apr 25, 1:12 AM CDT	Severe Thunderstorm Warning	SHV	Sabine, San Augustine	63 min
Apr 25, 3:11 AM CDT	Lake Wind Advisory	SHV	Harrison, Marion, Panola	13 hr
Apr 25, 5:36 AM CDT	River Flood Warning	SHV	Smith, Upshur, Wood	63 hr
Apr 25, 5:37 AM CDT	River Flood Warning	SHV	Wood	51 hr
Apr 25, 5:39 AM CDT	River Flood Warning	SHV	Gregg	51 hr
Apr 25, 5:40 AM CDT	River Flood Warning	SHV	Franklin, Morris, Titus	4 days
Apr 25, 5:49 AM CDT	River Flood Warning	SHV	Gregg, Rusk	36 days
Apr 25, 9:34 AM CDT	River Flood Warning	SHV	Gregg, Harrison, Panola, Rusk	59 hr
Apr 24, 11:55 PM CDT	Tornado Warning Tornado observedConsiderable damage threat	SHV	De Soto, Natchitoches, Sabine	50 min
Apr 25, 12:11 AM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo, Webster	28 min
Apr 25, 12:32 AM CDT	Severe Thunderstorm Warning	SHV	Bienville, De Soto, Natchitoches, Red River	43 min
Apr 25, 12:36 AM CDT	Tornado Warning	SHV	Bienville, Natchitoches, Red River	39 min
Apr 25, 1:01 AM CDT	Tornado Warning	SHV	Bienville, Jackson, Lincoln	44 min
Apr 25, 1:37 AM CDT	Tornado Warning	SHV	Bienville, Jackson, Lincoln, Ouachita, Union	38 min
Apr 25, 1:55 AM CDT	Severe Thunderstorm Warning	SHV	Caldwell, Jackson, Lincoln, Natchitoches, Ouachita, Union and 1 more	50 min
Apr 25, 2:14 AM CDT	Tornado Warning	SHV	Union	31 min
Apr 25, 2:49 AM CDT	Special Weather Statement	SHV	LaSalle	41 min
Apr 25, 3:02 AM CDT	Severe Thunderstorm Warning	SHV	Caldwell, LaSalle	43 min
Apr 25, 3:10 AM CDT	Tornado Warning	SHV	Caldwell, LaSalle	37 min
Apr 25, 3:59 AM CDT	Special Weather Statement	SHV	Natchitoches	46 min
Apr 25, 4:11 AM CDT	Severe Thunderstorm Warning	SHV	Grant, Natchitoches, Winn	49 min
Apr 25, 4:47 AM CDT	Special Weather Statement	SHV	Ouachita, Winn	43 min
Apr 25, 5:04 AM CDT	Special Weather Statement	SHV	Grant	41 min
Apr 25, 5:27 AM CDT	Severe Thunderstorm Warning	SHV	Grant	36 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2019 Every 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.