Alert archive / Texas / Tornado Watches in 1999
Tornado Watch 77
The Storm Prediction Center issued this tornado watch at Mar 8, 1999, 3:30 PM CST for 6 counties in Arkansas; 10 counties in Oklahoma; 12 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 8, 1999, 3:30 PM CST (21:30 UTC)
- Expired
- Mar 8, 1999, 8:00 PM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 28 counties
Crawford County, AR, Little River County, AR, Polk County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Atoka County, OK, Choctaw County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, McCurtain County, OK, McIntosh County, OK, Pittsburg County, OK, Pushmataha County, OK, Sequoyah County, OK, Bowie County, TX, Camp County, TX, Cass County, TX, Delta County, TX, Fannin County, TX, Franklin County, TX, Hopkins County, TX, Hunt County, TX, Lamar County, TX, Morris County, TX, Red River County, TX, Titus County, TX
The radar
The Western Arkansas radar (KSRX), 167 km from the middle of the area, began a volume at 21:34 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
Warnings issued inside it
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 8, 6:24 PM CST | Tornado Warning | TSA | McIntosh, Muskogee | 51 min |
| Mar 8, 6:42 PM CST | Tornado Warning | TSA | Haskell, Muskogee, Sequoyah | 48 min |
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 9.5 hours before the alert went out and 225 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 891 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 627 m²/s²
- 0-3 km storm-relative helicity
- 864 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 8, 7:00 AM CST | Severe Thunderstorm Watch | SPC | Bryan, Carter, Choctaw, Love, McCurtain, Marshall | 5 hr |
| Mar 8, 12:00 PM CST | Tornado Watch | SPC | Anderson, Angelina, Brazos, Burleson, Camp, Cherokee and 25 more | 6 hr |
Nearby
Tornado Watches in Texas, 1999Tornado Watches in Oklahoma, 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; radar from the NEXRAD Level II archive.