Isolated convection developed along a stationary boundary near the Big Bend region of Texas. Due to the weak mid to upper level flow, slow moving storms produced very heavy rainfall and flash flooding near the southern extent of the Big Bend National Park.
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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.
Isolated convection developed along a stationary boundary near the Big Bend region of Texas. Due to the weak mid to upper level flow, slow moving storms produced very heavy rainfall and flash flooding near the southern extent of the Big Bend National Park.
The local office's own words before the first event, 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 the first event at May 9, 5:42 PM CST, 41 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX 642 PM CDT SAT MAY 9 2009 .DISCUSSION... SEE 00Z AVIATION DISCUSSION BELOW. && .AVIATION... BROAD NORTHEASTERLY FLOW CONTINUING THIS EVENING IN THE WAKE OF A FRONTAL BOUNDARY THAT PASSED THROUGH THE REGION EARLIER TODAY. A SOUTHEASTERLY LOW-LEVEL JET OF 30-35 KTS WILL INCREASE THROUGH THE OVERNIGHT PERIOD TONIGHT...OVERRUNNING THE STALLED FRONTAL BOUNDARY TO THE SOUTH. AS A RESULT...CAN EXPECT ANOTHER MORNING IF MVFR CEILING ACROSS THE EASTERN TAF SITES...WITH KMAF/KFST POSSIBLY FLIRTING WITH IFR CEILINGS BY 13/14Z. FOR NOW HAVE MAINTAINED MVFR PREVAILING CONDITIONS PENDING 00Z MODEL GUIDANCE. AS THE LOW- LEVEL JET INCREASES OVERNIGHT...WOULDN/T BE SURPRISED TO SEE A T-STORM OR TWO DEVELOP AS GFS/WRF BUFR SOUNDINGS REVEAL A DECENT AMOUNT OF ELEVATED INSTABILITY IF LOW-LEVEL INHIBITION CAN BE OVERCOME. CONFIDENCE IS NOT HIGH ENOUGH AT THE PRESENT TIME TO INCLUDE WITH EVENING PACKAGE. FRONTAL BOUNDARY TO LIFT NORTHWARD SUNDAY AFTERNOON AS A WARM FRONT...ALLOWING WINDS TO GRADUALLY VEER TOWARDS THE SOUTHEAST. && 32 .PREV DISCUSSION... /ISSUED 245 PM CDT SAT MAY 9 2009/ DISCUSSION... STRONG FRONTAL BOUNDARY CURRENTLY NEAR THE BIG BEND WILL PLAY HAVOC WITH TEMPERATURES AND WEATHER IMPACTS THE NEXT COUPLE OF DAYS. HIGH PRESSURE WILL SETTLE SOUTHWARD TONIGHT INTO THE TEXAS PANHANDLE BEHIND THE FRONT. WARM ADVECTION ABOVE THE SURFACE SHOULD HELP LOW CLOUDS TO REFORM AGAIN WITH MOSTLY CLOUDY SKIES BY SUNDAY MORNING. THE HIGH PRESSURE WILL MOVE OFF TO THE NORTHEAST ON SUNDAY WITH WARMING TEMPERATURES AS WINDS TURN EAST TO SOUTHEASTERLY ACROSS MUCH OF THE AREA. BELIEVE THE BEST CHANCE OF THUNDERSTORMS TOMORROW WILL BE ACROSS THE DAVIS MOUNTAINS AND THE ADJACENT STOCKTON PLATEAU DUE TO STRONGER HEATING OROGRAPHIC LIFT AND REMNANTS OF THE OLD FRONTAL BOUNDARY. WENT DRY ELSEWHERE AS LOW LEVEL CONVERGENCE IS FORECAST TO BE WEAK WITH WEAK UPPER LEVEL SUPPORT. THE FRONT WILL MAKE ANOTHER SURGE SOUTHWESTWARD SUNDAY NIGHT AS AN UPPER LEVEL TROUGH MOVES ACROSS THE GREAT LAKES. CONTINUED THE SLIGHT POPS FOR SHOWERS AND THUNDERSTORMS ACROSS SOUTHERN SECTIONS MONDAY CLOSER TO THE FRONT AND INSTABILITY WITH SHOWERS FURTHER NORTH ACROSS THE NORTHERN PERMIAN BASIN. ZONAL FLOW WILL CONTINUE NEXT TUESDAY AND WEDNESDAY WITH MUCH WARMER TEMPERATURES AS A DRYLINE FORMS. WENT WITH ISOLATED THUNDERSTORMS TUESDAY AFTERNOON AND EVENING ACROSS THE PERMIAN BASIN EAST OF THE LINE AS A WEAK SHORTWAVE MOVES OVER THE DRYLINE. WENT DRY WEDNESDAY WITH A BETTER EASTWARD PUSH TO THE DRIER AIR IN THE WESTERLY FLOW ALOFT. CONTINUE THE SLIGHT POPS LATE WEDNESDAY NIGHT AND THURSDAY WITH NEAR NORMAL TEMPERATURES AS THE NEXT COLD FRONT DROPS INTO THE REGION. WENT DRY FRIDAY AND SATURDAY BEHIND THE FRONT WITH TEMPERATURES CLIMBING ABOVE NORMAL AGAIN. && .MAF WATCHES/WARNINGS/ADVISORIES... NM...NONE. TX...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX 135 PM CDT SAT MAY 9 2009 NMZ027>029-033-034-TXZ045>048-050>053-057>063-067>070-074-075- 079>082-258-101845- GUADALUPE MOUNTAINS OF EDDY COUNTY-EDDY COUNTY PLAINS- NORTHERN LEA COUNTY-CENTRAL LEA COUNTY-SOUTHERN LEA COUNTY-GAINES- DAWSON-BORDEN-SCURRY-ANDREWS-MARTIN-HOWARD-MITCHELL- VAN HORN AND HIGHWAY 54 CORRIDOR-REEVES COUNTY AND UPPER TRANS PECOS- LOVING-WINKLER-ECTOR-MIDLAND-GLASSCOCK-WARD-CRANE-UPTON-REAGAN- DAVIS/APACHE MOUNTAINS AREA-PECOS-PRESIDIO VALLEY-MARFA PLATEAU- BIG BEND AREA-TERRELL-GUADALUPE MOUNTAINS- 135 PM CDT SAT MAY 9 2009 /1235 PM MDT SAT MAY 9 2009/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST NEW MEXICO...SOUTHWEST TEXAS AND WEST TEXAS. .DAY ONE...THIS AFTERNOON AND TONIGHT ISOLATED THUNDERSTORMS WILL BE POSSIBLE IN THE DAVIS AND GLASS MOUNTAINS AND OVER THE LOWER TRANS PECOS...MAINLY THROUGH LATE AFTERNOON. A FEW OF THE STORMS COULD PRODUCE GUSTY WINDS OVER 40 MPH AND OCCASIONAL CLOUD TO GROUND LIGHTNING. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THERE IS A SLIGHT CHANCE OF THUNDERSTORMS SUNDAY AND SUNDAY NIGHT OVER THE DAVIS AND GLASS MOUNTAINS. SOME OF THESE STORMS MAY BECOME SEVERE AND BE CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WIND. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY OR TONIGHT. THIS PRODUCT...ALONG WITH OTHER WATCHES...WARNINGS...ADVISORIES... AND STATEMENTS ISSUED BY THE NATIONAL WEATHER SERVICE OFFICE IN MIDLAND CAN BE FOUND ON THE INTERNET AT /LOWER CASE/ HTTP://WEATHER.GOV/MIDLAND
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX 646 PM CDT SAT MAY 9 2009 TXZ081-100045- BIG BEND AREA- 646 PM CDT SAT MAY 9 2009 ...SIGNIFICANT WEATHER ALERT... THIS SIGNIFICANT WEATHER ALERT IS FOR SOUTHERN BREWSTER COUNTY. A STRONG THUNDERSTORM WAS LOCATED 20 MILES SOUTH OF PANTHER JUNCTION AT 643 PM CDT...MOVING NORTH AT 15 MPH. MARBLE SIZED HAIL...BRIEF HEAVY RAIN...STRONG GUSTY WINDS AND DEADLY LIGHTNING ARE POSSIBLE WITH THIS STORM THROUGH 8 PM CDT.
The national radar mosaic for the moment the first event began.
1 flash flood. Local standard time, as filed.
The National Park Dispatch Center reported flowing water over SH 120 just north of the Rio Grande Village. Although multiple vehicles hydroplaned near this location, no accidents or injuries were reported.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2009Every state in 2009This day in weather historyWarnings in Texas, May 2009
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: 169672.