Alert archive / Mississippi / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 131, NWS Jackson, MS

May 21, 1990Wayne County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at May 21, 1990, 2:19 PM CDT for Wayne County, Mississippi. It was in force for 26 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: May 21, 1990, 2:19 PM CDT (19:19 UTC)
Expired: May 21, 1990, 2:45 PM CDT
In force: 26 min
Issued by: NWS Jackson, MS
Area: Whole counties

County Wayne 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
May 21, 2:35 PM CDT	Hail 0.8	Wayne, 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

Jackson, MS (KJAN), launched 12:00Z, 7.3 hours before the alert went out and 151 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: 2059 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 558 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 114 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.4

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, May 21, 12:33 PM CDT, 1 hour 46 minutes before

MSZALL-211800-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE JACKSON MS
1230 PM CDT MON MAY 21 1990

...SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PARTS OF CENTRAL AND
SOUTH MISSISSIPPI UNTIL 500 PM...

AT 1230 PM...A LINE OF STRONG THUNDERSTORMS CONTINUES ACROSS CENTRAL
MISSISSIPPI FROM NEWTON TO CRYSTAL SPRINGS TO PORT GIBSON.  THE HEAVIEST
STORM WAS INDICATED NEAR HERMANVILLE.  THIS STORM PROBABLY CONTAINS
LARGE HAIL.  IT ANOTHER STRONG STORM WAS INDICATED NEAR MAGEE.

A WIND GUST LINE CONTINUES ROUGHLY 10 TO 15 MILES AHEAD OF THE
THUNDERSTORM LINE.  WIND GUSTS AROUND 50 MILES AN HOUR ARE POSSIBLE
ALMOST ANYWHERE AHEAD OF THIS LINE.

BOTH THE THUNDERSTORM LINE AND THE WIND GUST LINE ARE MOVING SOUTHEAST
AROUND 25 TO 30 MILES AN HOUR.  THE INDIVIDUAL THUNDERSTORMS ARE
MOVING EAST AT 35 TO 40 MILES AN HOUR.

Local storm report, May 21, 1:15 PM CDT, 1 hour 4 minutes before

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Special weather statement, May 21, 1:32 PM CDT, 47 minutes before

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Special weather statement, May 21, 1:57 PM CDT, 22 minutes before

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Special weather statement, May 21, 2:06 PM CDT, 13 minutes before

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Local storm report, May 21, 2:07 PM CDT, 12 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
May 21, 7:55 AM CDT	Severe Thunderstorm Warning	JAN	Leflore	50 min
May 21, 8:21 AM CDT	Severe Thunderstorm Warning	JAN	Winston	54 min
May 21, 8:29 AM CDT	Severe Thunderstorm Warning	JAN	Holmes	31 min
May 21, 8:51 AM CDT	Severe Thunderstorm Warning	JAN	Noxubee	54 min
May 21, 10:29 AM CDT	Severe Thunderstorm Warning	JAN	Winston	46 min
May 21, 10:40 AM CDT	Severe Thunderstorm Warning	JAN	Noxubee	65 min
May 21, 10:52 AM CDT	Severe Thunderstorm Warning	JAN	Neshoba	68 min
May 21, 11:52 AM CDT	Severe Thunderstorm Warning	JAN	Newton	53 min
May 21, 12:10 PM CDT	Severe Thunderstorm Warning	JAN	Lauderdale	50 min
May 21, 12:15 PM CDT	Severe Thunderstorm Warning	JAN	Claiborne	45 min
May 21, 1:02 PM CDT	Severe Thunderstorm Warning	JAN	Jasper	43 min
May 21, 1:08 PM CDT	Severe Thunderstorm Warning	JAN	Lincoln	37 min
May 21, 11:26 AM CDT	Severe Thunderstorm Warning	JAN	Sumter	34 min
May 21, 12:52 PM CDT	Severe Thunderstorm Warning	JAN	Choctaw	53 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.