Alert archive / Louisiana / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 314, NWS Shreveport, LA

November 30, 2019Caldwell Parish, Ouachita Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Nov 30, 2019, 3:57 PM CST for Caldwell Parish, Ouachita Parish, Louisiana. 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: Nov 30, 2019, 3:57 PM CST (21:57 UTC)
Expired: Nov 30, 2019, 4:45 PM CST
In force: 48 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Caldwell Parish, LA, Ouachita Parish, LA

The radar

The Ft Polk radar (KPOE), 149 km from the middle of the area, began a volume at 22:01 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
Nov 30, 11:38 AM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 10.0 hours before the alert went out and 153 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: 320 J/kg
Mixed-layer CIN: -311 J/kg
Mixed-layer LCL: 606 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 487 m²/s²
0-3 km storm-relative helicity: 527 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

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 Nov 30, 12:05 PM CST, 3 hours 52 minutes earlier.

Area forecast discussion, Nov 30, 12:05 PM CST, 3 hours 52 minutes before

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Hazardous weather outlook, Nov 30, 11:51 AM CST, 4 hours 6 minutes before

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In the hours before

Special weather statement, Nov 30, 1:41 PM CST, 2 hours 16 minutes before

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Special weather statement, Nov 30, 1:58 PM CST, 1 hour 59 minutes before

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Special weather statement, Nov 30, 2:14 PM CST, 1 hour 43 minutes before

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Special weather statement, Nov 30, 2:32 PM CST, 1 hour 25 minutes before

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Special weather statement, Nov 30, 2:53 PM CST, 1 hour 4 minutes before

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Special weather statement, Nov 30, 3:14 PM CST, 43 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
Nov 30, 8:16 AM CST	Special Weather Statement	SHV	Red River	29 min
Nov 30, 9:17 AM CST	Special Weather Statement	SHV	Bowie	43 min
Nov 30, 9:42 AM CST	Special Weather Statement	SHV	Camp, Franklin, Titus, Wood	48 min
Nov 30, 10:15 AM CST	Severe Thunderstorm Warning	SHV	Bowie, Cass, Morris, Red River, Titus	45 min
Nov 30, 10:56 AM CST	Severe Thunderstorm Warning	SHV	Bowie	34 min
Nov 30, 12:56 PM CST	Special Weather Statement	SHV	San Augustine	34 min
Nov 30, 4:03 PM CST	Special Weather Statement	SHV	San Augustine	57 min
Nov 30, 1:10 PM CST	Special Weather Statement	SHV	Red River	35 min
Nov 30, 1:41 PM CST	Special Weather Statement	SHV	Sabine	34 min
Nov 30, 1:58 PM CST	Special Weather Statement	SHV	Jackson	47 min
Nov 30, 2:14 PM CST	Special Weather Statement	SHV	Sabine	46 min
Nov 30, 2:23 PM CST	Severe Thunderstorm Warning	SHV	De Soto, Natchitoches, Red River, Sabine	52 min
Nov 30, 2:32 PM CST	Special Weather Statement	SHV	Ouachita	28 min
Nov 30, 2:53 PM CST	Special Weather Statement	SHV	Ouachita	52 min
Nov 30, 2:56 PM CST	Severe Thunderstorm Warning	SHV	Jackson, Lincoln, Ouachita, Union	49 min
Nov 30, 3:14 PM CST	Special Weather Statement	SHV	Winn	46 min
Nov 30, 3:24 PM CST	Severe Thunderstorm Warning	SHV	Jackson, Winn	51 min
Nov 30, 4:44 PM CST	Special Weather Statement	SHV	Ouachita	31 min
Nov 30, 8:42 AM CST	Special Weather Statement	SHV	Sevier	48 min
Nov 30, 9:14 AM CST	Special Weather Statement	SHV	Sevier	31 min
Nov 30, 9:52 AM CST	Special Weather Statement	SHV	Hempstead, Little River	23 min
Nov 30, 10:19 AM CST	Special Weather Statement	SHV	Hempstead	26 min
Nov 30, 11:35 AM CST	Special Weather Statement	SHV	Nevada	40 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.