Alert archive / Louisiana / Flash Flood Warnings in 2013

Flash Flood Warning 16, NWS Shreveport, LA

October 31, 20134 parishes in Louisiana

NWS Shreveport, LA issued this flash flood warning at Oct 31, 2013, 8:50 AM CDT for 4 parishes in Louisiana. 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: Oct 31, 2013, 8:50 AM CDT (13:50 UTC)
Expired: Oct 31, 2013, 11:45 AM CDT
In force: 3 hr
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Flood severity: None

Counties Grant Parish, LA, Natchitoches Parish, LA, Sabine Parish, LA, Winn Parish, LA

The radar

The Ft Polk radar (KPOE), 61 km from the middle of the area, began a volume at 13:53 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, 1.8 hours before the alert went out and 178 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: 785 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 576 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 317 m²/s²
0-3 km storm-relative helicity: 378 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 10.6

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 Oct 31, 7:46 AM CDT, 1 hour 4 minutes earlier.

Area forecast discussion, Oct 31, 7:46 AM CDT, 1 hour 4 minutes before

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Hazardous weather outlook, Oct 31, 6:05 AM CDT, 2 hours 45 minutes before

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In the hours before

Local storm report, Oct 31, 5:46 AM CDT, 3 hours 4 minutes before

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Local storm report, Oct 31, 6:23 AM CDT, 2 hours 27 minutes before

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Special weather statement, Oct 31, 8:30 AM CDT, 20 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
Oct 30, 11:06 PM CDT	Areal Flood Advisory	SHV	Cherokee, Gregg, Harrison, Panola, Rusk, Smith	3 hr
Oct 30, 11:59 PM CDT	Flash Flood Warning	SHV	Cherokee, Gregg, Rusk, Smith	6 hr
Oct 31, 3:21 AM CDT	Areal Flood Warning	SHV	Cass, Harrison, Marion, Panola	3 hr
Oct 31, 4:18 AM CDT	Areal Flood Warning	SHV	Angelina, Nacogdoches, Sabine, San Augustine, Shelby	3 hr
Oct 31, 4:45 AM CDT	Lake Wind Advisory	SHV	Bowie, Camp, Cass, Cherokee, Franklin, Gregg and 10 more	13 hr
Oct 31, 6:32 AM CDT	River Flood Warning	SHV	Anderson, Cherokee, Houston	5 days
Oct 31, 6:45 AM CDT	River Flood Warning	SHV	Bowie, Cass, Morris	3 hr
Oct 31, 6:48 AM CDT	River Flood Warning	SHV	Franklin, Morris, Titus	4 days
Oct 31, 7:42 AM CDT	Areal Flood Warning	SHV	Sabine	3 hr
Oct 31, 10:11 AM CDT	River Flood Warning	SHV	Nacogdoches, Panola, Rusk, San Augustine, Shelby	34 hr
Oct 31, 10:11 AM CDT	River Flood Warning	SHV	Sabine, San Augustine	3 days
Oct 31, 9:18 AM CDT	Areal Flood Advisory	SHV	Caldwell, Jackson, Ouachita, Union	117 min
Oct 31, 10:07 AM CDT	Severe Thunderstorm Warning	SHV	Caldwell, Grant, LaSalle, Winn	38 min
Oct 31, 10:31 AM CDT	Areal Flood Advisory	SHV	LaSalle	3 hr
Oct 31, 11:47 AM CDT	Areal Flood Warning	SHV	Grant, Natchitoches, Sabine, Winn	3 hr

Nearby

Flash Flood Warnings in Louisiana, 2013 Every flash flood warning in 2013

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.