Alert archive / Texas / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 227, NWS Midland/Odessa, TX
NWS Midland/Odessa, TX issued this severe thunderstorm warning at Jun 11, 1999, 6:32 PM CDT for Gaines County, Texas. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 11, 1999, 6:32 PM CDT (23:32 UTC)
- Expired
- Jun 11, 1999, 7:15 PM CDT
- In force
- 43 min
- Issued by
- NWS Midland/Odessa, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Gaines County, TX
The radar
The Midland/Odessa radar (KMAF), 98 km from the middle of the area, began a volume at 23:32 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 11, 4:00 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Midland Regional, TX (KMAF), launched 12:00Z, 11.5 hours before the alert went out and 97 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
- 2010 J/kg
- Mixed-layer CIN
- -68 J/kg
- Mixed-layer LCL
- 719 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 192 m²/s²
- 0-3 km storm-relative helicity
- 312 m²/s²
- Significant tornado parameter
- 1.9
- Supercell composite
- 7.2
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.
NWS Midland/Odessa, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 11, 3:48 PM CDT, 2 hours 44 minutes earlier.
Area forecast discussion, Jun 11, 3:48 PM CDT, 2 hours 44 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MIDLAND TX 345 PM CDT THU JUN 10 1999 SHORT TERM... STRONG TO SEVERE CONVECTION HAS FIRED OVER THE DAVIS MOUNTAINS... WITH CONVECTION IMMINENT ALONG THE OUTFLOW BOUNDARY EXTENDING FROM THE ABILENE AREA NORTHWEST TO AROUND LUBBOCK. SPC HAS PULLED TRIGGERS ON WATCHES EXTENDING INTO SOUTHERN REACHES OF THE CWA... PLEASE REFER TO WATCH STATUS MESSAGES FOR ADDITIONAL MESOSCALE INFO. SIGNIFICANT THREAT WILL BE LARGE HAIL DESPITE HIGH WBZ'S. IN ADDITION...HIGH PRECIP WATER VALUES AND SLOW MOVEMENT ARGUE FOR LOCALLY HEAVY RAINFALL...BUT BECAUSE THE ANTECEDENT PRECIP VALUES ARE LOW...A FLASH FLOOD WATCH DOES NOT APPEAR IMMINENT AT THIS TIME. PER LBB'S REQUEST...SCURRY COUNTY WILL BE FOLDED INTO A FLASH FLOOD WATCH WITH THE 430 PM ZONE ISSUANCE. PRECIP SHOULD CONTINUE THROUGH MUCH OF THE NIGHT...SUPPORTED BY GOOD LOW LEVEL INFLOW...A PLETHORA OF OUTFLOW BOUNDARIES...AN APPROACHING WEAK SHORTWAVE TROUGH...AND FAVORABLE UPPER JET DYNAMICS. INDEED... WATER VAPOR IMAGERY SUGGESTS A SIGNIFICANT JET STREAK PUNCHING ACROSS NORTHERN MEXICO. SIGNIFICANT HEAVY RAINFALL THREAT...HOWEVER...WILL REMAIN TO THE NORTHEAST OF THE CWA. LONG TERM... THE KEY TO THE LATTER PERIODS WILL BE WHERE OUTFLOW BOUNDARIES SET UP. AGAIN...GIVEN FAVORABLE THERMODYNAMICS AND THE PRESENCE OF THESE BOUNDARIES...A REPEAT PERFORMANCE OF DIURNAL CONVECTION LOOKS REASONABLE SATURDAY AND AGAIN ON SUNDAY. GUIDANCE EXTREMA LOOK ACCEPTABLE WITH MINOR REVISIONS AT THIS END. REAL LONG TERM... LONG RANGE MODELS CONTINUE TO INDICATE BUILDING UPPER HEIGHTS OVER THE WESTERN U.S. AND A DEVELOPING LONGWAVE TROUGH OVER THE NORTHEAST. WITH SOME NORTHWESTERLY FLOW AND A CONTINUED UNSTABLE AIRMASS...WIDELY SCATTERED DIURNAL CONVECTION LOOKS TO BE A GOOD BET WITH NEAR NORMAL TEMPERATURES THROUGH THE EARLY PART OF NEXT WEEK. THAT'S A WRAP...LBB WZIS...ABQ SHORTLY...AND BOX SCORES FOLLOW...70. MAF 69/88/68/88 5332 CNM 68/92/67/92 2222 MRF 62/89/60/88 3333 P07 70/92/70/90 4333
The office that day
Everything else NWS Midland/Odessa, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 10, 7:06 PM CDT | Severe Thunderstorm Warning | MAF | Winkler | 54 min |
| Jun 10, 10:24 PM CDT | Severe Thunderstorm Warning | MAF | Scurry | 61 min |
| Jun 11, 12:08 AM CDT | Severe Thunderstorm Warning | MAF | Scurry | 67 min |
| Jun 11, 3:19 PM CDT | Severe Thunderstorm Warning | MAF | Reeves | 56 min |
| Jun 11, 3:58 PM CDT | Severe Thunderstorm Warning | MAF | Pecos | 47 min |
| Jun 11, 4:40 PM CDT | Severe Thunderstorm Warning | MAF | Reeves | 50 min |
| Jun 11, 4:53 PM CDT | Flash Flood Warning | MAF | Reeves | 3 hr |
| Jun 11, 6:13 PM CDT | Severe Thunderstorm Warning | MAF | Pecos | 47 min |
| Jun 11, 6:15 PM CDT | Severe Thunderstorm Warning | MAF | Andrews | 45 min |
| Jun 11, 5:12 PM CDT | Severe Thunderstorm Warning | MAF | Lea | 63 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.