Alert archive / Mississippi / Tornado Watches in 1999

Tornado Watch 155

April 14, 1999Phillips County, Arkansas; 44 counties in Mississippi

The Storm Prediction Center issued this tornado watch at Apr 14, 1999, 6:30 PM CDT for Phillips County, Arkansas; 44 counties in Mississippi. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Apr 14, 1999, 6:30 PM CDT (23:30 UTC)
Expired
Apr 15, 1999, 12:00 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 45 counties

Phillips County, AR, Attala County, MS, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Clarke County, MS, Coahoma County, MS, Copiah County, MS, Covington County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lafayette County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Leflore County, MS, Lincoln County, MS, Madison County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Oktibbeha County, MS, Panola County, MS, Pontotoc County, MS, Quitman County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Sunflower County, MS, Tallahatchie County, MS, Union County, MS, Wayne County, MS, Webster County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 14, 6:32 PM CDTTornado WarningJANHumphreys48 min
Apr 14, 7:09 PM CDTSevere Thunderstorm WarningJANHolmes, Leflore46 min
Apr 14, 7:21 PM CDTTornado WarningJANHolmes34 min
Apr 14, 7:32 PM CDTTornado WarningJANCarroll48 min
Apr 14, 7:49 PM CDTSevere Thunderstorm WarningJANHinds31 min
Apr 14, 7:57 PM CDTTornado WarningJANHolmes33 min
Apr 14, 8:12 PM CDTSevere Thunderstorm WarningJANMontgomery33 min
Apr 14, 8:31 PM CDTSevere Thunderstorm WarningJANWebster49 min
Apr 14, 8:38 PM CDTTornado WarningJANMontgomery32 min
Apr 14, 9:14 PM CDTSevere Thunderstorm WarningJANHumphreys, Sunflower31 min
Apr 14, 9:51 PM CDTSevere Thunderstorm WarningJANRankin, Simpson49 min
Apr 14, 9:58 PM CDTSevere Thunderstorm WarningJANJefferson Davis, Marion47 min
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

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 11.5 hours before the alert went out and 124 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 12:00Z on 1999-04-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 1999-04-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 156 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
1238 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
156 m²/s²
0-3 km storm-relative helicity
238 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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 14, 10:00 AM CDTTornado WatchSPCAshley, Bradley, Calhoun, Columbia, Drew, Hempstead and 5 more6 hr
Apr 14, 4:00 PM CDTTornado WatchSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 18 more6 hr

Nearby

Tornado Watches in Mississippi, 1999Tornado Watches in Arkansas, 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.