Alert archive / Texas / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 47, NWS Midland/Odessa, TX
NWS Midland/Odessa, TX issued this severe thunderstorm warning at Apr 28, 1999, 6:27 PM CDT for Andrews County, Ector County, Texas. It was in force for 63 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
- Apr 28, 1999, 6:27 PM CDT (23:27 UTC)
- Expired
- Apr 28, 1999, 7:30 PM CDT
- In force
- 63 min
- Issued by
- NWS Midland/Odessa, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Andrews County, TX, Ector County, TX
The radar
The Midland/Odessa radar (KMAF), 41 km from the middle of the area, began a volume at 23:27 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 nearest sounding before it
Amarillo Airport, TX (KAMA), launched 12:00Z, 11.5 hours before the alert went out and 359 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
- 70 J/kg
- Mixed-layer CIN
- -359 J/kg
- Mixed-layer LCL
- 1995 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 179 m²/s²
- 0-3 km storm-relative helicity
- 245 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.
NWS Midland/Odessa, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 28, 3:30 PM CDT, 2 hours 57 minutes earlier.
Area forecast discussion, Apr 28, 3:30 PM CDT, 2 hours 57 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MIDLAND TX 330 PM CDT WED APR 28 1999 19Z SFC ANLYS INDCS WARM FNT W TCC-S LBB-SE ABI LINE AND CDFNT ALG RED RIVER-W CDS-DHT LINE. CNVTN DVLPG ATTM ALG ANALYZED WARM FNTL BNDRY MOVG NEWD JUST N OF MAF CWA. OTRW GENLY SELY LOW LVL FLOW PVLG E OF MTNS WITH LGT SWLY FLOW ACR FAR WRN SECTIONS. DRY LINE ANALYZED ALG E SLPS MTNS WITH DWPNTS LOW 40S-LOW 50S E OF MTNS. MID/HI LVL MSTR MOVG E ACR NM SPREADING INTO W TX. STLT DERIVED LI/S APCHG MINUS 6 CNTRL SECTIONS AND MINUS 10 ACR EXTREME NRN FA. STLT DERIVED CAPES BTWN 800-1300 J/KG. MODELS IN GOOD AGREEMENT THIS FCST PD. SHRTWV ROTATING AROUND BROAD WRN U.S. TROF ALG WITH AFOREMENTIONED SFC BNDRYS TO PROVIDE SUF LIFT LATE THIS AFTN/EVE FOR WDLY SCT TSTMS. SOME TSTMS MAY BE SEVERE TNGT ACR NRN AND ERN ZONES WHERE DEEPER LOW LVL MSTR IS LOCATED. IN WRN AREAS...EVEN THOUGH GOOD LARGE SCALE LIFT IS ENTERING SCENE...EXPECTED CAPES/LOW LVL MSTR PROBABLY TOO LOW FOR SVR. MITIGATING FACTOR FOR WIDESPREAD CNVTN ATTM IS NEGLIGIBLE LOW LVL MSTR AND ADAP CAP 5 DEG C AT MAF. IF CNVTN DVLPS NEXT FEW HRS...BELIEVE IT WILL DO SO WRN SECTIONS VCNTY MTNS/DRY LINE AND SYNOPTIC LIFT AND MOVE NE PER MODEL HODOGRAPHS. MODEL SOUNDINGS FOR MAF SUG INITIALLY SPLITTING STORMS WITH BETTER CHCS OF ISOLD SUPERCELLS LATER TNGT AS LLJ DEVELOPS AND HODOGRAPH BECOMES MORE IMPRESSIVE. SHRTWV XPCD TO ROTATE ACR AREA BY SUNRISE. PSG OF SHRTWV SUGS MORE INSOLATION THUR VS TDA DUE TO ASSOCD MID LVL SUBSIDENCE. THEREFORE BELIEVE INCRD CHC CNVTN APPRS TO BE LATE THURS/FRI AS NEXT SHRTWV EJECTS ACR AREA FROM GREAT BASIN SYS. AS LOW LVL FLOW BACKS TO MORE ELY COMPONENT...GRADUALLY COOLER CONDITIONS XPCD INTO FRIDAY. MED RANGE MODELS INDC PCPN CHCS DECR LATE IN WEEKEND. BF MAF 59/86/60/82 30/20/40/40 CNM 56/88/55/81 30/20/30/30 MRF 46/82/46/73 20/20/30/40 PO7 62/84/60/81 30/20/30/30
The office that day
Everything else NWS Midland/Odessa, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 28, 5:46 PM CDT | Severe Thunderstorm Warning | MAF | Ector, Winkler | 44 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.