Alert archive / Louisiana / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 64, NWS New Orleans, LA

July 14, 1989Avoyelles Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Jul 14, 1989, 5:35 PM CDT for Avoyelles Parish, Louisiana. It was in force for 40 min.

The area

The counties it named.

The facts

Issued: Jul 14, 1989, 5:35 PM CDT (22:35 UTC)
Expired: Jul 14, 1989, 6:15 PM CDT
In force: 40 min
Issued by: NWS New Orleans, LA
Area: Whole counties

County Avoyelles Parish, LA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 10.6 hours before the alert went out and 156 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: 2233 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 691 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 34 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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.

In the hours before

Special weather statement, Jul 14, 12:35 PM CDT, 5 hours before

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Special weather statement, Jul 14, 1:35 PM CDT, 4 hours before

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Special weather statement, Jul 14, 1:35 PM CDT, 4 hours before

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Special weather statement, Jul 14, 2:35 PM CDT, 3 hours before

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Special weather statement, Jul 14, 3:35 PM CDT, 2 hours before

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Special weather statement, Jul 14, 4:40 PM CDT, 55 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 6:29 AM CDT	Flash Flood Warning	LIX	St. Mary	3 hr
Jul 14, 6:32 AM CDT	Flash Flood Warning	LIX	Saint Landry	4 hr

Nearby

Severe Thunderstorm Warnings in Louisiana, 1989 Every severe thunderstorm warning in 1989

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.