Alert archive / Texas / Tornado Watches in 1999

Tornado Watch 495

June 29, 1999Beaver County, Texas County, Oklahoma; 21 counties in Texas

The Storm Prediction Center issued this tornado watch at Jun 29, 1999, 8:45 PM CDT for Beaver County, Texas County, Oklahoma; 21 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 29, 1999, 8:45 PM CDT (01:45 UTC)
Expired
Jun 29, 1999, 11:00 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 23 counties

Beaver County, OK, Texas County, OK, Armstrong County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Childress County, TX, Collingsworth County, TX, Donley County, TX, Gray County, TX, Hall County, TX, Hansford County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Moore County, TX, Ochiltree County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Sherman County, TX, Swisher County, TX, Wheeler County, TX

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 29, 9:22 PM CDTTornado WarningAMACarson, Hutchinson68 min
Jun 29, 9:35 PM CDTSevere Thunderstorm WarningAMAArmstrong55 min
Jun 29, 9:42 PM CDTSevere Thunderstorm WarningAMAGray63 min
Jun 29, 10:31 PM CDTSevere Thunderstorm WarningAMAHansford44 min

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 1.8 hours before the alert went out and 19 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, Amarillo Airport, TX at 00:00Z on 1999-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1987 joules per kilogram.LCLEL10008507005003002001001 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, Amarillo Airport, TX at 00:00Z on 1999-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 107 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
1987 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
2394 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
107 m²/s²
0-3 km storm-relative helicity
274 m²/s²
Significant tornado parameter
0.0
Supercell composite
20.7

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
Jun 29, 11:00 PM CDTSevere Thunderstorm WatchSPCAlfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 22 more6 hr
Jun 30, 5:00 PM CDTTornado WatchSPCAlfalfa, Beaver, Garfield, Grant, Harper, Kay and 10 more3 hr

Nearby

Tornado Watches in Texas, 1999Tornado Watches in Oklahoma, 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.