Alert archive / Louisiana / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 70, NWS Lake Charles, LA

May 10, 1999Saint Martin Parish, St. Mary Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at May 10, 1999, 12:57 PM CDT for Saint Martin Parish, St. Mary Parish, Louisiana. It was in force for 63 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 10, 1999, 12:57 PM CDT (17:57 UTC)
Expired: May 10, 1999, 2:00 PM CDT
In force: 63 min
Issued by: NWS Lake Charles, LA
Area: Whole counties

Counties Saint Martin Parish, LA, St. Mary Parish, LA

The watch it was issued in

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

Issued	Product	Office	Lasted
May 10, 11:45 AM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 6.0 hours before the alert went out and 162 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: 1626 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 624 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 3.8

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 severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Lake Charles, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at May 10, 10:22 AM CDT, 2 hours 35 minutes earlier.

Area forecast discussion, May 10, 10:22 AM CDT, 2 hours 35 minutes before

SOUTHWEST AND CENTRAL LOUISIANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1022 AM CDT MON MAY 10 1999

COORD WITH SPC...CAN EXPECT WATCH TO BE DROPPED BEHIND THE LINE OF
TSTMS. WILL UPDATE WRKLC1.

11

BPT   LCH
LFT   AEX

In the hours before

Local storm report, May 10, 11:55 AM CDT, 1 hour 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1155 AM CDT MON MAY 10 1999

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0853 AM    MERRYVILLE                LA   WIND DAMAGE
05/10/99   BEAUREGARD                     NUMEROUS TREES DOWN AROSS
                                          WESTERN PORTIONS OF
                                          BEAUREGARD PARISH FROM
                                          SHERIFFS OFFICE

0930 AM    LEESVILLE                 LA   WIND DAMAGE
05/10/99   VERNON                         TREES DOWN ALONG HIGHWAY 8
                                          WEST OF LEESVILLE BETWEEN
                                          930 TO 945 AM REPORTED BY
                                          SHERIFFS OFFICE.

Local storm report, May 10, 12:16 PM CDT, 41 minutes before

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Local storm report, May 10, 12:16 PM CDT, 41 minutes before

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Local storm report, May 10, 12:18 PM CDT, 39 minutes before

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Local storm report, May 10, 12:33 PM CDT, 24 minutes before

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Local storm report, May 10, 12:33 PM CDT, 24 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 10, 8:11 AM CDT	Severe Thunderstorm Warning	LCH		59 min
May 10, 8:35 AM CDT	Severe Thunderstorm Warning	LCH	Beauregard, Vernon	50 min
May 10, 8:35 AM CDT	Severe Thunderstorm Warning	LCH	Calcasieu, Cameron	50 min
May 10, 9:18 AM CDT	Severe Thunderstorm Warning	LCH	Allen, Rapides	57 min
May 10, 9:18 AM CDT	Severe Thunderstorm Warning	LCH	Jefferson Davis	57 min
May 10, 9:27 AM CDT	Severe Thunderstorm Warning	LCH	Beauregard, Calcasieu, Vernon	48 min
May 10, 9:27 AM CDT	Severe Thunderstorm Warning	LCH	Cameron	48 min
May 10, 10:47 AM CDT	Tornado Warning	LCH	Evangeline	48 min
May 10, 10:59 AM CDT	Tornado Warning	LCH	Avoyelles	51 min
May 10, 11:28 AM CDT	Severe Thunderstorm Warning	LCH	Iberia, Lafayette, Saint Martin	77 min
May 10, 11:28 AM CDT	Severe Thunderstorm Warning	LCH	Saint Landry	77 min
May 10, 11:45 AM CDT	Severe Thunderstorm Warning	LCH	Saint Martin, St. Mary	60 min
May 10, 12:03 PM CDT	Tornado Warning	LCH	Saint Martin	47 min
May 10, 7:15 AM CDT	Severe Thunderstorm Warning	LCH	Hardin, Jefferson	60 min
May 10, 7:15 AM CDT	Severe Thunderstorm Warning	LCH	Tyler	60 min
May 10, 7:46 AM CDT	Tornado Warning	LCH	Tyler	49 min
May 10, 7:50 AM CDT	Tornado Warning	LCH	Hardin	50 min
May 10, 8:04 AM CDT	Tornado Warning	LCH	Jasper	61 min
May 10, 8:11 AM CDT	Severe Thunderstorm Warning	LCH	Jefferson, Newton, Orange	59 min
May 10, 8:15 AM CDT	Tornado Warning	LCH	Orange	65 min
May 10, 8:31 AM CDT	Tornado Warning	LCH	Newton	49 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1999 Every severe thunderstorm warning in 1999

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.