Alert archive / Mississippi / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 151, NWS Memphis, TN

April 5, 1999Calhoun County, Mississippi

NWS Memphis, TN issued this severe thunderstorm warning at Apr 5, 1999, 11:52 PM CDT for Calhoun County, Mississippi. It was in force for 48 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: Apr 5, 1999, 11:52 PM CDT (04:52 UTC)
Expired: Apr 6, 1999, 12:40 AM CDT
In force: 48 min
Issued by: NWS Memphis, TN
Area: Whole counties

County Calhoun County, MS

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 5, 8:00 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 4.9 hours before the alert went out and 114 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1399 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 145 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

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, Apr 5, 9:15 PM CDT, 2 hours 37 minutes before

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The office that day

Everything else NWS Memphis, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 5, 8:20 PM CDT	Severe Thunderstorm Warning	MEG	Quitman	35 min
Apr 5, 9:50 PM CDT	Severe Thunderstorm Warning	MEG	Tallahatchie	35 min
Apr 5, 11:23 PM CDT	Severe Thunderstorm Warning	MEG	Yalobusha	32 min
Apr 5, 8:15 PM CDT	Severe Thunderstorm Warning	MEG	Shelby	50 min
Apr 5, 7:17 PM CDT	Severe Thunderstorm Warning	MEG	Craighead	33 min
Apr 5, 7:22 PM CDT	Tornado Warning	MEG	Clay	33 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; the sounding from the Mesonet's radiosonde archive.