Alert archive / Texas / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 18, NWS Lubbock, TX
NWS Lubbock, TX issued this severe thunderstorm warning at Apr 13, 1999, 2:42 PM CDT for 4 counties in Texas. It was in force for 48 min. 3 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Apr 13, 1999, 2:42 PM CDT (19:42 UTC)
- Expired
- Apr 13, 1999, 3:30 PM CDT
- In force
- 48 min
- Issued by
- NWS Lubbock, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Bailey County, TX, Cochran County, TX, Hockley County, TX, Lamb County, TX
The radar
The Lubbock radar (KLBB), 74 km from the middle of the area, began a volume at 19:45 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 13, 2:45 PM CDT | Hail 0.75 | Enochs, TX | |
| Apr 13, 3:15 PM CDT | Thunderstorm Wind | Littlefield, TX | Strong wind blew the roof off a business. |
| Apr 13, 3:20 PM CDT | Hail 0.75 | Littlefield, TX |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 13, 2:30 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Amarillo Airport, TX (KAMA), launched 12:00Z, 7.7 hours before the alert went out and 175 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
- 173 J/kg
- Mixed-layer CIN
- -133 J/kg
- Mixed-layer LCL
- 741 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 184 m²/s²
- 0-3 km storm-relative helicity
- 138 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.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Apr 13, 11:40 AM CDT, 3 hours 2 minutes before
TXZ021>044-131555- AREA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE LUBBOCK TX 1140 AM CDT TUE APR 13 1999 THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS FROM THE CENTRAL PORTIONS OF THE SOUTH PLAINS EASTWARD INTO THE LOW ROLLING PLAINS THIS AFTERNOON INTO THE EVENING. THIS MODERATE RISK AREA IS GENERALLY ALONG AND EAST OF A I-27 AND US 87 LINE. TO THE WEST OF THIS LINE A SLIGHT RISK OF SEVERE THUNDERSTORMS IS POSSIBLE...MAINLY THIS AFTERNOON. A SURFACE LOW WAS LOCATED IN SOUTHEAST NEW MEXICO WITH A DRYLINE EXTENDING SOUTHWARD. A COLD FRONT TWAS EXTENDING SOUTHWEST OF THE LOW TO JUST NORTH OF EL PASO WITH A WARM FRONT EXTENDING EAST NORTHEAST TO NEAR CHILDRESS. AN UPPER LEVEL LOW LOCATED OVER THE SOUTHERN SECTION OF THE NEW MEXICO ARIZONA BORDER WILL MOVE EAST AND INTERACT WITH THE DRYLINE...WARM FRONT AND COLD FRONT THIS AFTERNOON AND EVENING. LARGE HAIL AND DAMAGING WINDS WILL BE THE MOST LIKELY THREATS HOWEVER...AN ISOLATED TORNADO COULD OCCUR IN THE VICINITY OF THE WARM FRONT. SPOTTER ACTIVATION WILL BE LIKELY THIS AFTERNOON FOR THE SOUTH PLAINS AND SOUTHERN PANHANDLE. THE LOW ROLLING PLAINS WILL MOST LIKELY NEED TO BE ACTIVATED THIS EVENING.
The office that day
Everything else NWS Lubbock, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 13, 1:50 PM CDT | Severe Thunderstorm Warning | LUB | Parmer | 35 min |
| Apr 13, 3:00 PM CDT | Tornado Warning | LUB | Lamb | 30 min |
| Apr 13, 5:10 PM CDT | Severe Thunderstorm Warning | LUB | Garza | 50 min |
| Apr 13, 5:49 PM CDT | Tornado Warning | LUB | Hall | 26 min |
Nearby
Severe Thunderstorm Warnings in Texas, 1999Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.