Alert archive / Mississippi / Tornado Watches in 1999

Tornado Watch 40

January 29, 199924 parishes in Louisiana; 26 counties in Mississippi

The Storm Prediction Center issued this tornado watch at Jan 29, 1999, 6:00 PM CST for 24 parishes in Louisiana; 26 counties in Mississippi. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jan 29, 1999, 6:00 PM CST (00:00 UTC)
Expired
Jan 30, 1999, 12:00 AM CST
In force
6 hr
Issued by
the Storm Prediction Center
All 50 counties

Acadia Parish, LA, Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Grant Parish, LA, Jefferson Davis Parish, LA, LaSalle Parish, LA, Livingston Parish, LA, Natchitoches Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Saint Helena Parish, LA, Saint Landry Parish, LA, Tangipahoa Parish, LA, Vernon Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Adams County, MS, Amite County, MS, Clarke County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, George County, MS, Greene County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lawrence County, MS, Lincoln County, MS, Marion County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Simpson County, MS, Smith County, MS, Stone County, MS, Walthall County, MS, Wayne County, MS, Wilkinson County, MS

Warnings issued inside it

19 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jan 29, 6:07 PM CSTFlash Flood WarningLCHAvoyelles, Rapides118 min
Jan 29, 6:19 PM CSTSevere Thunderstorm WarningLIXPearl River51 min
Jan 29, 6:50 PM CSTSevere Thunderstorm WarningJANLamar50 min
Jan 29, 7:37 PM CSTSevere Thunderstorm WarningLIXPike43 min
Jan 29, 7:38 PM CSTSevere Thunderstorm WarningJANForrest47 min
Jan 29, 7:59 PM CSTSevere Thunderstorm WarningLIXWalthall41 min
Jan 29, 8:23 PM CSTSevere Thunderstorm WarningJANMarion52 min
Jan 29, 8:28 PM CSTFlash Flood WarningLIXPike4 hr
Jan 29, 8:45 PM CSTSevere Thunderstorm WarningLIXWalthall45 min
Jan 29, 9:15 PM CSTSevere Thunderstorm WarningJANLamar60 min
Jan 29, 9:29 PM CSTFlash Flood WarningJANCatahoula, Concordia, Franklin, Tensas5 hr
Jan 29, 9:44 PM CSTTornado WarningJANLamar31 min
Jan 29, 9:58 PM CSTTornado WarningJANForrest47 min
Jan 29, 10:21 PM CSTFlash Flood WarningMOBWayne4 hr
Jan 29, 10:29 PM CSTSevere Thunderstorm WarningMOBWayne61 min
Jan 29, 10:31 PM CSTTornado WarningMOBPerry59 min
Jan 29, 10:42 PM CSTFlash Flood WarningJANClarke2 hr
Jan 29, 10:42 PM CSTFlash Flood WarningJANJones2 hr
Jan 29, 11:00 PM CSTFlash Flood WarningJANForrest, Lamar, Marion3 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 0.0 hours before the alert went out and 174 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-pSkew-T log-p diagram, Jackson, MS at 00:00Z on 1999-01-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 00:00Z on 1999-01-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -80 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
582 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
-80 m²/s²
0-3 km storm-relative helicity
-28 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.

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 29, 7:00 PM CSTSevere Thunderstorm WatchSPCBossier, Caddo, De Soto, Sabine5 hr

Nearby

Tornado Watches in Mississippi, 1999Tornado Watches in Louisiana, 1999Every tornado watch 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.