The supercell thunderstorms moved into a very cool air mass and began to fade. About 8pm CDT, the upper level lift had eroded the capping inversion and the entire dryline suddenly erupted into a line of storms along the New Mexico state line.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS MAF wrote it up.
The supercell thunderstorms moved into a very cool air mass and began to fade. About 8pm CDT, the upper level lift had eroded the capping inversion and the entire dryline suddenly erupted into a line of storms along the New Mexico state line. This line marched to the east with only a few hail reports for the rest of the evening.The overall setting showed a stationary front in the morning with upslope fog and drizzle over much of the region. During the early afternoon the dryline/warm front moved away from the mountains and served as the primary focus for the convection that day. Most of the supercells on this day were fairly small in stature.
The Midland/Odessa radar (KMAF), 98 km away, was scanning. The volume nearest the first event began at 02:01 UTC.
3 hail, 1 flash flood. Local standard time, as filed.
Already soaked Gaines County got a little more flooding as a line of storms passed through the area after sunset. Minor flooding was reported on FM 1788 south of Seminole.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 1999Every state in 1999This day in weather historyWarnings in Texas, May 1999
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5697525, 5697526, 5697527, 5697615.