Alert archive / Mississippi / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 121, NWS Jackson, MS

February 9, 1999Jefferson Davis County, Lawrence County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Feb 9, 1999, 4:03 PM CST for Jefferson Davis County, Lawrence County, Mississippi. It was in force for 47 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: Feb 9, 1999, 4:03 PM CST (22:03 UTC)
Expired: Feb 9, 1999, 4:50 PM CST
In force: 47 min
Issued by: NWS Jackson, MS
Area: Whole counties

Counties Jefferson Davis County, MS, Lawrence County, MS

What was reported inside it

Time	Report	Where	Remark
Feb 9, 4:15 PM CST	Hail 0.75	Bassfield, 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 nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 10.1 hours before the alert went out and 85 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: 658 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 497 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 136 m²/s²
0-3 km storm-relative helicity: 124 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.9

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, Feb 9, 1:53 PM CST, 2 hours 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
153 PM CST TUE FEB 09 1999

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH/COUNTY LOCATION....

0130 PM    ST JOSEPH                 LA   FLOODING
02/09/99   TENSAS                         SOME STREETS AND YARDS
                                          FLOODED PER OEP OFFICE

0140 PM    15 SW HAZLEHURST          MS   1.5 INCH HAIL
02/09/99   COPIAH                         REPORTED BY COPIAH COUNTY
                                          GAME MANAGEMENT STAFF

Local storm report, Feb 9, 2:28 PM CST, 1 hour 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
228 PM CST TUE FEB 09 1999

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH/COUNTY LOCATION....

0215 PM    10 SW HAZLEHURST          MS   1.75 INCH HAIL
02/09/99   COPIAH                         REPORTED BY CD OFFICE

0231 PM    WESSON                    MS   1.75 INCH HAIL
02/09/99   COPIAH                         REPORTED THROUGH STATE EOC
                                          BY COUNTY CD OFFICE

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 9, 1:18 PM CST	Tornado Warning	JAN	Claiborne, Jefferson	32 min
Feb 9, 1:32 PM CST	Tornado Warning	JAN	Copiah	48 min
Feb 9, 2:15 PM CST	Tornado Warning	JAN	Lincoln	50 min
Feb 9, 2:23 PM CST	Tornado Warning	JAN	Copiah	32 min
Feb 9, 3:01 PM CST	Severe Thunderstorm Warning	JAN	Covington, Jones	49 min
Feb 9, 3:05 PM CST	Tornado Warning	JAN	Lincoln	35 min
Feb 9, 3:14 PM CST	Tornado Warning	JAN	Jefferson Davis	46 min
Feb 9, 8:25 AM CST	Severe Thunderstorm Warning	JAN	Franklin	35 min
Feb 9, 11:09 AM CST	Flash Flood Warning	JAN	Franklin	111 min
Feb 9, 11:56 AM CST	Flash Flood Warning	JAN	Tensas	2 hr
Feb 9, 12:30 PM CST	Severe Thunderstorm Warning	JAN	Tensas	30 min
Feb 9, 2:33 PM CST	Severe Thunderstorm Warning	JAN	Catahoula	47 min
Feb 9, 4:18 PM CST	Severe Thunderstorm Warning	JAN	Catahoula	32 min
Feb 9, 4:24 PM CST	Severe Thunderstorm Warning	JAN	Concordia, Tensas	36 min
Feb 9, 4:48 PM CST	Severe Thunderstorm Warning	JAN	Catahoula	37 min
Feb 9, 5:14 PM CST	Flash Flood Warning	JAN	Catahoula, Concordia	61 min
Feb 9, 5:24 PM CST	Severe Thunderstorm Warning	JAN	Catahoula	46 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.