Alert archive / Mississippi / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 209, NWS Jackson, MS

August 30, 1990Lamar County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Aug 30, 1990, 4:45 PM CDT for Lamar County, Mississippi. It was in force for 30 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Aug 30, 1990, 4:45 PM CDT (21:45 UTC)
Expired: Aug 30, 1990, 5:15 PM CDT
In force: 30 min
Issued by: NWS Jackson, MS
Area: Whole counties

County Lamar County, MS

The radar

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

What was reported inside it

Time	Report	Where	Remark
Aug 30, 5:00 PM CDT	Hail 0.75	Lamar, MS

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 9.8 hours before the alert went out and 108 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: 2438 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 889 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -7 m²/s²
0-3 km storm-relative helicity: 6 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

Local storm report, Aug 30, 2:38 PM CDT, 2 hours 7 minutes before

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Special weather statement, Aug 30, 3:23 PM CDT, 1 hour 22 minutes before

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Local storm report, Aug 30, 3:50 PM CDT, 55 minutes before

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Special weather statement, Aug 30, 4:12 PM CDT, 33 minutes before

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Special weather statement, Aug 30, 4:19 PM CDT, 26 minutes before

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Special weather statement, Aug 30, 4:42 PM CDT, 3 minutes before

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The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 30, 12:36 PM CDT	Severe Thunderstorm Warning	JAN	Clarke	69 min
Aug 30, 1:11 PM CDT	Severe Thunderstorm Warning	JAN	Wayne	64 min
Aug 30, 2:19 PM CDT	Severe Thunderstorm Warning	JAN	Jones	26 min
Aug 30, 2:26 PM CDT	Severe Thunderstorm Warning	JAN	Wayne	34 min
Aug 30, 12:17 PM CDT	Severe Thunderstorm Warning	JAN	Choctaw	28 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 1990 Every severe thunderstorm warning in 1990

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.