Alert archive / Texas / Tornado Watches in 1999
Tornado Watch 233
The Storm Prediction Center issued this tornado watch at May 9, 1999, 4:30 PM CDT for 24 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 9, 1999, 4:30 PM CDT (21:30 UTC)
- Expired
- May 9, 1999, 9:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 24 counties
Andrews County, TX, Borden County, TX, Coke County, TX, Crane County, TX, Crockett County, TX, Dawson County, TX, Ector County, TX, Fisher County, TX, Gaines County, TX, Glasscock County, TX, Howard County, TX, Irion County, TX, Martin County, TX, Midland County, TX, Mitchell County, TX, Nolan County, TX, Pecos County, TX, Reagan County, TX, Scurry County, TX, Sterling County, TX, Terrell County, TX, Upton County, TX, Ward County, TX, Winkler County, TX
The radar
The Midland/Odessa radar (KMAF), 89 km from the middle of the area, began a volume at 21:29 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
13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 9, 4:55 PM CDT | Tornado Warning | MAF | Pecos | 50 min |
| May 9, 5:05 PM CDT | Severe Thunderstorm Warning | MAF | Terrell | 40 min |
| May 9, 5:27 PM CDT | Flash Flood Warning | MAF | Pecos | 3 hr |
| May 9, 5:44 PM CDT | Severe Thunderstorm Warning | MAF | Terrell | 46 min |
| May 9, 5:47 PM CDT | Tornado Warning | MAF | Pecos | 43 min |
| May 9, 5:57 PM CDT | Severe Thunderstorm Warning | MAF | Reagan, Upton | 48 min |
| May 9, 6:09 PM CDT | Severe Thunderstorm Warning | SJT | Crockett | 66 min |
| May 9, 6:30 PM CDT | Severe Thunderstorm Warning | MAF | Pecos | 45 min |
| May 9, 7:15 PM CDT | Severe Thunderstorm Warning | MAF | Pecos | 45 min |
| May 9, 7:49 PM CDT | Severe Thunderstorm Warning | MAF | Terrell | 41 min |
| May 9, 8:30 PM CDT | Severe Thunderstorm Warning | MAF | Terrell | 30 min |
| May 9, 8:44 PM CDT | Severe Thunderstorm Warning | SJT | Crockett | 61 min |
| May 9, 8:58 PM CDT | Severe Thunderstorm Warning | MAF | Terrell | 47 min |
The nearest sounding before it
Midland Regional, TX (KMAF), launched 12:00Z, 9.5 hours before the alert went out and 90 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
- 1809 J/kg
- Mixed-layer CIN
- -293 J/kg
- Mixed-layer LCL
- 1047 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 114 m²/s²
- 0-3 km storm-relative helicity
- 106 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 |
|---|---|---|---|---|
| May 9, 2:00 PM CDT | Tornado Watch | SPC | Armstrong, Briscoe, Carson, Castro, Childress, Collingsworth and 32 more | 6 hr |
| May 9, 6:30 PM CDT | Severe Thunderstorm Watch | SPC | Clay, Wichita, Wilbarger | 6 hr |
Nearby
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.