Alert archive / Louisiana / Flash Flood Warnings in 1991

Flash Flood Warning 18, NWS Lake Charles, LA

May 4, 1991Rapides Parish, Louisiana

NWS Lake Charles, LA issued this flash flood warning at May 4, 1991, 1:30 AM CDT for Rapides Parish, Louisiana. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: May 4, 1991, 1:30 AM CDT (06:30 UTC)
Expired: May 4, 1991, 5:30 AM CDT
In force: 4 hr
Issued by: NWS Lake Charles, LA
Area: Whole counties

County Rapides Parish, LA

The nearest sounding before it

Longview/Gregg, TX (KGGG), launched 00:00Z, 6.5 hours before the alert went out and 234 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: 437 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 1035 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 168 m²/s²
0-3 km storm-relative helicity: 276 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 5.3

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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.

In the hours before

Special weather statement, May 3, 8:44 PM CDT, 4 hours 46 minutes before

LAZ001>003-005>009-011>014-MSZ010-TXZ028-032-033-045>049-040240-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE LAKE CHARLES LA
840 PM CDT FRI MAY 3 1991

...SEVERE THUNDERSTORM DEVELOPES IN EAST TEXAS...

AT 830 PM...A SEVERE THUNDERSTORM HAD DEVELOPED NEAR THE NORTHERN PART
OF RAYBURN LAKE IN EAST TEXAS.  THIS STORM WAS MOVING EAST AND SOUTHEAST
AT 25 MPH AND WILL LIKELY PRODUCE STRONG GUSTY WINDS AND SOME HAIL.

OTHERWISEz..A LARGE AREA OF RAIN WITH ISOLATED THUNDERSTORMS..WITH VERY
HEAVY RAIN...CONTINUED FROM WEST OF LUFKIN TEXAS TO THE MONROE AREA.

Special weather statement, May 3, 10:39 PM CDT, 2 hours 51 minutes before

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Local storm report, May 3, 11:02 PM CDT, 2 hours 28 minutes before

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Special weather statement, May 4, 12:59 AM CDT, 31 minutes before

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Local storm report, May 4, 1:18 AM CDT, 12 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 10:18 PM CDT	Severe Thunderstorm Warning	LCH	Grant, Rapides	57 min
May 3, 11:13 PM CDT	Severe Thunderstorm Warning	LCH	Grant, LaSalle, Rapides	62 min
May 4, 12:13 AM CDT	Severe Thunderstorm Warning	LCH	LaSalle, Rapides	47 min
May 4, 1:04 AM CDT	Severe Thunderstorm Warning	LCH	Beauregard, Vernon	56 min
May 4, 2:05 AM CDT	Severe Thunderstorm Warning	LCH	Allen, Beauregard, Rapides, Vernon	55 min
May 4, 2:52 AM CDT	Tornado Warning	LCH	Allen	38 min
May 4, 3:05 AM CDT	Tornado Warning	LCH	Evangeline	55 min
May 4, 3:09 AM CDT	Severe Thunderstorm Warning	LCH	Beauregard	66 min
May 4, 4:10 AM CDT	Severe Thunderstorm Warning	LCH	Allen, Beauregard	65 min
May 4, 4:10 AM CDT	Severe Thunderstorm Warning	LCH	Calcasieu	65 min
May 3, 7:35 PM CDT	Flash Flood Warning	LCH	Nacogdoches	115 min
May 3, 8:19 PM CDT	Severe Thunderstorm Warning	LCH	Nacogdoches	56 min
May 3, 8:34 PM CDT	Severe Thunderstorm Warning	LCH	San Augustine	56 min
May 3, 9:08 PM CDT	Severe Thunderstorm Warning	LCH	Sabine	67 min
May 3, 9:16 PM CDT	Tornado Warning	LCH	San Augustine	59 min
May 4, 2:06 AM CDT	Severe Thunderstorm Warning	LCH	Angelina, Tyler	69 min
May 4, 2:22 AM CDT	Severe Thunderstorm Warning	LCH	Jasper, Newton	68 min

Nearby

Flash Flood Warnings in Louisiana, 1991 Every flash flood warning in 1991

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.