Alert archive / Mississippi / Tornado Watches in 1999

Tornado Watch 156

April 14, 199912 counties in Alabama; 65 counties in Mississippi

The Storm Prediction Center issued this tornado watch at Apr 14, 1999, 10:00 PM CDT for 12 counties in Alabama; 65 counties in Mississippi. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Apr 14, 1999, 10:00 PM CDT (03:00 UTC)
Expired
Apr 15, 1999, 4:00 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 77 counties

Colbert County, AL, Fayette County, AL, Franklin County, AL, Greene County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Marion County, AL, Pickens County, AL, Sumter County, AL, Winston County, AL, Adams County, MS, Alcorn County, MS, Amite County, MS, Attala County, MS, Benton County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Claiborne County, MS, Clarke County, MS, Clay County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Itawamba County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lafayette County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lee County, MS, Leflore County, MS, Lincoln County, MS, Lowndes County, MS, Madison County, MS, Marion County, MS, Marshall County, MS, Monroe County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Panola County, MS, Perry County, MS, Pike County, MS, Pontotoc County, MS, Prentiss County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Tallahatchie County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Walthall County, MS, Warren County, MS, Wayne County, MS, Webster County, MS, Wilkinson County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 14, 10:17 PM CDTSevere Thunderstorm WarningJANScott, Smith48 min
Apr 14, 10:19 PM CDTSevere Thunderstorm WarningJANCovington, Smith51 min
Apr 14, 10:43 PM CDTSevere Thunderstorm WarningJANJasper32 min
Apr 14, 10:45 PM CDTTornado WarningJANCovington35 min
Apr 14, 10:53 PM CDTTornado WarningJANJones32 min
Apr 14, 10:59 PM CDTTornado WarningJANJasper51 min
Apr 14, 11:26 PM CDTSevere Thunderstorm WarningJANForrest, Jones34 min
Apr 14, 11:35 PM CDTTornado WarningJANJones50 min
Apr 14, 11:40 PM CDTSevere Thunderstorm WarningJANClarke, Lauderdale50 min
Apr 14, 11:41 PM CDTSevere Thunderstorm WarningJANLamar34 min
Apr 14, 11:53 PM CDTTornado WarningJANForrest52 min
Apr 15, 12:02 AM CDTSevere Thunderstorm WarningBMXSumter48 min
Apr 15, 12:04 AM CDTSevere Thunderstorm WarningMOBWayne71 min
Apr 15, 12:19 AM CDTTornado WarningBMXSumter51 min
Apr 15, 12:23 AM CDTTornado WarningJANJones32 min
Apr 15, 12:24 AM CDTTornado WarningMOBWayne81 min
Apr 15, 12:31 AM CDTSevere Thunderstorm WarningJANKemper, Neshoba49 min
Apr 15, 12:35 AM CDTSevere Thunderstorm WarningJANClarke35 min
Apr 15, 12:54 AM CDTSevere Thunderstorm WarningBMXGreene, Hale51 min
Apr 15, 1:11 AM CDTSevere Thunderstorm WarningMOBGreene, Perry79 min

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 3.0 hours before the alert went out and 43 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 1999-04-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 219 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 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 1999-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 219 square meters per square second.19395878Sfc1 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
219 J/kg
Mixed-layer CIN
-112 J/kg
Mixed-layer LCL
1104 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
219 m²/s²
0-3 km storm-relative helicity
361 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.3

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
Apr 15, 12:00 AM CDTTornado WatchSPCAutauga, Bibb, Butler, Chilton, Choctaw, Clarke and 24 more6 hr
Apr 15, 6:30 AM CDTTornado WatchSPCBarbour, Coffee, Dale, Geneva, Henry, Houston6 hr

Nearby

Tornado Watches in Mississippi, 1999Tornado Watches in Alabama, 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.