Alert archive / Mississippi / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 255, NWS Jackson, MS

May 5, 1991Adams County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at May 5, 1991, 9:45 PM CDT for Adams County, Mississippi. It was in force for 45 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 5, 1991, 9:45 PM CDT (02:45 UTC)
Expired: May 5, 1991, 10:30 PM CDT
In force: 45 min
Issued by: NWS Jackson, MS
Area: Whole counties

County Adams County, MS

What was reported inside it

Time	Report	Where	Remark
May 5, 10:15 PM CDT	Thunderstorm Wind 0	Adams, 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 00:00Z, 2.8 hours before the alert went out and 209 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: 1927 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 884 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 55 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, May 5, 4:16 PM CDT, 5 hours 29 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
415 PM CDT SUN MAY 5 1991

TIME (CDT)     PLACE                            EVENT

0830-0930AM    NEAR CHARLESTON              1.8 INCHES OF RAIN IN 1 HR
               TALLAHATCHIE COUNTY          AS RPTD BY STATE E.O.C.

0849AM         NEAR MINTER CITY             NICKEL SIZE HAIL COVERING
               LEFLORE COUNTY               PART OF A COUNTY ROAD FM C.D.

0905AM         GREENWOOD AIRPORT            WIND GUST 52KT FROM SAO
               CARROLL COUNTY

1015AM         6 MI E OF COFFEEVILLE        POSSIBLE TORNADO DAMAGE TO 5
               YALOBUSHA COUNTY             COTTON TRAILERS, ONE HOUSE WITH
                                x            SHINGLE DAMAGE, ONE MOBILE HOME
                                            USED AS VOTING PRECINCT DESTROYED
                                            1 INCH RAIN IN 1 HOUR AT 1000AM.

Special weather statement, May 5, 5:36 PM CDT, 4 hours 9 minutes before

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Special weather statement, May 5, 6:44 PM CDT, 3 hours 1 minute before

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Local storm report, May 5, 6:55 PM CDT, 2 hours 50 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 5, 8:02 PM CDT	Tornado Warning	JAN	Humphreys, Sunflower	43 min
May 6, 12:01 AM CDT	Severe Thunderstorm Warning	JAN	Rankin	29 min
May 6, 12:27 AM CDT	Severe Thunderstorm Warning	JAN	Smith	48 min
May 6, 12:40 AM CDT	Tornado Warning	JAN	Smith	35 min
May 6, 12:51 AM CDT	Severe Thunderstorm Warning	JAN	Jasper	54 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 1991 Every severe thunderstorm warning in 1991

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.