Alert archive / Mississippi / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 321, NWS Jackson, MS

April 24, 1999Kemper County, Lauderdale County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Apr 24, 1999, 3:50 PM CDT for Kemper County, Lauderdale County, Mississippi. It was in force for 50 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: Apr 24, 1999, 3:50 PM CDT (20:50 UTC)
Expired: Apr 24, 1999, 4:40 PM CDT
In force: 50 min
Issued by: NWS Jackson, MS
Area: Whole counties

Counties Kemper County, MS, Lauderdale County, MS

What was reported inside it

Time	Report	Where	Remark
Apr 24, 4:15 PM CDT	Hail 0.75	Meridian, 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 24, 11:30 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 8.8 hours before the alert went out and 137 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: 1465 J/kg
Mixed-layer CIN: -136 J/kg
Mixed-layer LCL: 725 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 95 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

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.

In the hours before

Special weather statement, Apr 24, 10:20 AM CDT, 5 hours 30 minutes before

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Special weather statement, Apr 24, 10:25 AM CDT, 5 hours 25 minutes before

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Local storm report, Apr 24, 1:52 PM CDT, 1 hour 58 minutes before

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Local storm report, Apr 24, 1:52 PM CDT, 1 hour 58 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
Apr 24, 9:32 AM CDT	Severe Thunderstorm Warning	JAN	Clay	48 min
Apr 24, 11:14 AM CDT	Severe Thunderstorm Warning	JAN	Clay	46 min
Apr 24, 11:32 AM CDT	Severe Thunderstorm Warning	JAN	Lowndes	48 min
Apr 24, 11:57 AM CDT	Severe Thunderstorm Warning	JAN	Clay	33 min
Apr 24, 12:27 PM CDT	Severe Thunderstorm Warning	JAN	Lowndes	33 min
Apr 24, 1:27 PM CDT	Severe Thunderstorm Warning	JAN	Clay	33 min
Apr 24, 2:17 PM CDT	Severe Thunderstorm Warning	JAN	Lowndes	33 min
Apr 24, 2:31 PM CDT	Severe Thunderstorm Warning	JAN	Noxubee	34 min
Apr 24, 4:07 PM CDT	Severe Thunderstorm Warning	JAN	Bolivar	48 min
Apr 24, 4:34 PM CDT	Severe Thunderstorm Warning	JAN	Lauderdale	31 min
Apr 24, 5:05 PM CDT	Severe Thunderstorm Warning	JAN	Warren, Yazoo	50 min
Apr 24, 5:32 PM CDT	Severe Thunderstorm Warning	JAN	Hinds	48 min
Apr 24, 5:53 PM CDT	Severe Thunderstorm Warning	JAN	Warren	32 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.