Alert archive / Texas / Flash Flood Warnings in 1999

Flash Flood Warning 32, NWS Midland/Odessa, TX

May 28, 1999Brewster County, Texas

NWS Midland/Odessa, TX issued this flash flood warning at May 28, 1999, 8:34 PM CDT for Brewster County, Texas. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
May 28, 1999, 8:34 PM CDT (01:34 UTC)
Expired
May 28, 1999, 11:30 PM CDT
In force
3 hr
Issued by
NWS Midland/Odessa, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Brewster County, TX

The radar

The Midland/Odessa radar (KMAF), 245 km from the middle of the area, began a volume at 01:37 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

Del Rio, TX (KDRT), launched 00:00Z, 1.6 hours before the alert went out and 220 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.

Skew-T log-pSkew-T log-p diagram, Del Rio, TX at 00:00Z on 1999-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1347 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 00:00Z on 1999-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -48 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1347 J/kg
Mixed-layer CIN
-17 J/kg
Mixed-layer LCL
2221 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
-48 m²/s²
0-3 km storm-relative helicity
36 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KMAF 290139
FFWMAF
TXC043-290430-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MIDLAND-ODESSA TX
834 PM CDT FRI MAY 28 1999

THE MIDLAND-ODESSA NATIONAL WEATHER SERVICE OFFICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  BREWSTER COUNTY IN TEXAS

* UNTIL 1130 PM CDT

* AT 825 PM CDT...WEATHER SERVICE DOPPLER RADAR DETECTED NUMEROUS    
  THUNDERSTORMS WITH VERY HEAVY RAIN OVER CENTRAL BREWSTER COUNTY. 

* SOME LOCATIONS AFFECTED BY THIS FLASH FLOOD WARNING INCLUDE...     
  PERSIMMON GAP AND PORTIONS OF THE BIG BEND NATIONAL PARK.

THUNDERSTORMS WITH VERY HEAVY RAINFALL OVER CENTRAL BREWSTER COUNTY 
ARE EXPECTED TO MERGE INTO ONE LARGE COMPLEX BETWEEN 845 AND 900 PM 
CDT. THIS WILL RESULT IN VERY SLOW MOVING THUNDERSTORMS WITH HEAVY 
RAINFALL...WHICH WILL CAUSE FLASH FLOODING OF SMALL CREEKS AND 
STREAMS...LOW WATER CROSSINGS...AND NORMALLY DRY WASHES.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

DURING THE DARKNESS OF NIGHT...FLOODED SECTIONS OF ROAD MAY NOT BE
VISIBLE TO@ MOTORISTS. SOME ROADWAYS MAY EVEN BE CLOSED.

LAT...LON 3010 10265 3011 10379 2949 10378 2949 10282
          2991 10255

DJK

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at May 28, 2:22 PM CDT, 6 hours 12 minutes earlier.

Area forecast discussion, May 28, 2:22 PM CDT, 6 hours 12 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MIDLAND TX
222 PM CDT FRI MAY 28 1999

SHRA/TSRA CONTINUING TO MOVE/DISSIPATE SE ACROSS N/E PB ATTM IN
ASSOCN WITH WEAK SHRTWV TROF IN NW MID LEVEL FLOW. AS A RESULT
CONVECTIVE DEBRIS CLOUDS HAVE LIMITED SURFACE HEATING ACROSS AREAS N
OF PECOS RIVER AND INSTABILITY. INSOLATION WILL LIKELY INCREASE LATE
AFTERNOON AND WITH CAPES AROUND 1000 J/KG AND PWS AROUND 1 TSTMS
MAY DEVELOP. FULL SUN HOWEVER HAS BEEN ONGOING IN MTNS WHERE 85H-7H
THETA-E RIDGE AXIS IS POSITIONED. VISIBLE IMAGERY INDICATES CU/SHRA
DEVELOPING DAVIS/GDP MTNS AND WILL LOOK FOR WDLY SCT TSTMS THROUGH
EARLY EVENING. MAIN CONCERN FOR THE NIGHT IS POTENTIAL FOR CONVECTIVE
COMPLEX TO MOVE SE OUT OF NM MTNS SE NM/W TX. MODELS (EXCEPT AVN)
DEPICT A SHRTWV TROF MOVING SE ACROSS NM TONIGHT. STILL ETA/NGM
DIFFER ON WHERE BEST ENERGY WILL COME OUT WITH NGM BEING FARTHEST N.
IF COMPLEX DOES DEVELOP WOULD FEED INTO LOW LEVEL THETA-E RIDGE AXIS
WHICH WILL BE INVOF OR JUST E OF MTNS. ETA IS AGGRESSIVE WITH FEATURE
INDICATING DEEP LAYERED POSITIVE VERTICAL MOTIONS AND WITH PWS
AROUND 1...THEREFORE POTENTIAL FOR SIGNIFICANT RAINS WOULD EXIST
WITHIN COMPLEX. HAVE COORD WITH ABQ/LBB AND WILL WORD LOCALLY HEAVY
RAIN WITH LIKELY POPS SE NM AND NEARBY W TX COUNTIES. SCATTERED POPS
ELSEWHERE ACROSS THE POPS REFLECT INCREASED CHANCES LATE WITH
COMPLEX. WILL OPT TO HOLD OFF ON FFA ATTM BUT LATER SHIFTS WILL NEED
MONITOR. LONG RANGE PATTERN SUGGEST SIGNIFICANT WARMING AND DRIER PER
MID LEVEL RIDGE AND WARM 7H TEMPS.

MAF 60/89/62/93 40/20/20/20
CNM 60/90/61/94 60/30/20/10
MRF 52/86/55/86 20/20/20/-
P07 65/87/67/92 20/20/20/-

GPM

The office that day

Everything else NWS Midland/Odessa, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 28, 7:40 PM CDTSevere Thunderstorm WarningMAFBrewster65 min
May 28, 7:47 PM CDTSevere Thunderstorm WarningMAFPecos43 min
May 28, 7:53 PM CDTSevere Thunderstorm WarningMAFTerrell52 min
May 28, 8:56 PM CDTSevere Thunderstorm WarningMAFPecos64 min
May 28, 10:01 PM CDTSevere Thunderstorm WarningMAFUpton44 min
May 28, 10:09 PM CDTFlash Flood WarningMAFPecos3 hr
May 28, 10:27 PM CDTSevere Thunderstorm WarningMAFReagan63 min
May 28, 10:41 PM CDTSevere Thunderstorm WarningMAFUpton64 min
May 28, 11:00 PM CDTSevere Thunderstorm WarningMAFLoving, Reeves45 min
May 28, 11:32 PM CDTSevere Thunderstorm WarningMAFReagan43 min
May 29, 12:00 AM CDTSevere Thunderstorm WarningMAFEctor, Loving, Winkler45 min
May 29, 12:33 AM CDTSevere Thunderstorm WarningMAFAndrews42 min
May 29, 12:35 AM CDTFlash Flood WarningMAFLoving115 min
May 29, 12:55 AM CDTFlash Flood WarningMAFAndrews3 hr

Nearby

Flash Flood Warnings in Texas, 1999Every flash flood 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.