Alert archive / Texas / Flash Flood Warnings in 1999

Flash Flood Warning 20, NWS Midland/Odessa, TX

May 21, 1999Jeff Davis County, Texas

NWS Midland/Odessa, TX issued this flash flood warning at May 21, 1999, 4:31 PM CDT for Jeff Davis County, Texas. It was in force for 119 min. 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 21, 1999, 4:31 PM CDT (21:31 UTC)
Expired
May 21, 1999, 6:30 PM CDT
In force
119 min
Issued by
NWS Midland/Odessa, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Jeff Davis County, TX

The radar

The Midland/Odessa radar (KMAF), 229 km from the middle of the area, began a volume at 21:30 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

Midland Regional, TX (KMAF), launched 12:00Z, 9.5 hours before the alert went out and 228 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, Midland Regional, TX at 12:00Z on 1999-05-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 686 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, Midland Regional, TX at 12:00Z on 1999-05-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 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
686 J/kg
Mixed-layer CIN
-404 J/kg
Mixed-layer LCL
1505 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
186 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMAF 212132
FFWMAF
TXC243-212330-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MIDLAND-ODESSA TX
431 PM CDT FRI MAY 21 1999

THE MIDLAND-ODESSA NATIONAL WEATHER SERVICE OFFICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  JEFF DAVIS COUNTY IN TEXAS

* UNTIL 630 PM CDT

* AT 430 PM CDT...WEATHER SERVICE DOPPLER RADAR DETECTED A
  THUNDERSTORM WITH VERY HEAVY RAIN 18 MILES NORTHWEST OF FORT 
  DAVIS...MOVING SLOWLY EAST AT UNDER 5 MPH.

* SOME LOCATIONS AFFECTED BY THIS FLASH FLOOD WARNING INCLUDE...   
  FORT DAVIS

RADAR INDICATED AMOUNTS OF BETWEEN 1 TO 2 INCHES OF RAINFALL NEAR
THE JUNCTION OF TX 118 AND TX 166.  ARROYOS AND CREEKS MAY EXPERIENCE
RAPID FLASH FLOODING. MOTORISTS ARE ALSO URGED TO EXERCISE CAUTION.

HIKERS SHOULD NOT ATTEMPT TO CROSS ANY FLOODED WASHES. A FOOT OF
SWIFTLY FLOWING WATER CAN EASILY SWEEP YOU OFF YOUR FEET. MOVE TO
HIGHER GROUND AND WAIT FOR THE FLOODWATERS TO RECEDE.

LAT...LON 3085 10442 3059 10433 3042 10388 3064 10370
          3109 10410

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 21, 1:30 PM CDT, 3 hours 1 minute earlier.

Area forecast discussion, May 21, 1:30 PM CDT, 3 hours 1 minute before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MIDLAND TX
130 PM CDT (1230 PM MDT) FRI MAY 21 1999

SPC HAS SLIGHT RISK FOR NORTHERN PERMIAN BASIN/SOUTHEAST NM AS
FRONTAL BOUNDARY COULD BECOME THE FOCUS FOR SOME AFTERNOON
THUNDERSTORMS. FRONT CURRENTLY RUNNING FROM NEAR KSPS... TO NORTH OF
KMAF AND KINK. HOWEVER... KMAF SITTING ON A 0.21 INCH PRECIP TOTAL
SINCE APRIL 1... SO IT IS HARD TO GET TOO EXCITED ABOUT RAIN.  WILL
PROBABLY INCLUDE SOME LOW POPS FOR THE NORTH.  UPPER RIDGE STAYS
OVER THE AREA THROUGH 48 HRS WITH CUT OFF LOW SPINNING OVER SOUTHERN
CALIFORNIA. DO NOT SEE MUCH CHANCE OF RAIN UNTIL THE LOW COMES
EASTWARD... MRF BRINGS IN INTO THE AREA LATE TUESDAY.  PLENTY OF
MOISTURE TO WORK WITH... BUT HAVE TO OVERCOME THE CAP.  DRYLINE
PACKED AGAINST THE HIGHER ELEVATIONS OUT WEST... NOT EXPECTED TO
MOVE MUCH TODAY... COULD SEE SOMETHING GO UP IN THE DAVIS MOUNTAINS
DURING THE LATE AFTERNOON/EARLY EVENING.  DO NOT AGREE WITH GUIDANCE
NUMBERS... EXPECT ABOVE NORMAL TEMPS TO CONTINUE THROUGH THE PERIOD.

MAF 66/93/66/94  0000
CNM 61/91/62/94  1000
MRF 53/84/55/86  1000
P07 68/91/67/92  0000

72

In the hours before

Special weather statement, May 21, 12:28 PM CDT, 4 hours 3 minutes before
NMZ027>029-TXZ045>048-050>052-057>063-067>070-074-075-079>082-220500-

THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE MIDLAND-ODESSA TX
630 AM CDT FRI MAY 21 1999

THIS OUTLOOK PERTAINS TO THE FOLLOWING COUNTIES IN WEST TEXAS:

ANDREWS   CULBERSON  GLASSCOCK   MARTIN    REAGAN   UPTON
BORDEN    DAWSON     HOWARD      MIDLAND   REEVES   WARD
BREWSTER  ECTOR      JEFF DAVIS  PECOS     SCURRY   WINKLER
CRANE     GAINES     LOVING      PRESIDIO  TERRELL

AND IN SOUTHEAST NEW MEXICO:

EDDY      LEA

SYNOPSIS: A FRONTAL BOUNDARY REMAINS NEARLY STATIONARY ACROSS
THE NORTHERN PORTIONS OF THE PERMIAN BASIN EARLY THIS AFTERNOON.
ISOLATED THUNDERSTORM DEVELOPMENT MAY OCCUR ALONG AND TO THE NORTH
OF THIS BOUNDARY LATE THIS AFTERNOON OR THIS EVENING...GENERALLY
ALONG AND NORTH OF A CARLSBAD TO ANDREWS TO BIG SPRING LINE.

THE AIRMASS WILL BE MODERATELY MOIST AND UNSTABLE ACROSS THIS AREA.
STORMS THAT DO DEVELOP MAY BECOME SEVERE WITH THE POSSIBILITY OF
LARGE HAIL.

DUE TO THE ISOLATED NATURE OF THESE THUNDERSTORMS...SPOTTER
ACTIVATION IS NOT ANTICIPATED.

FOR THE WEST CpENTRAL TEXAS OUTLOOK SEE THE PRODUCT LBBSPSSJT ISSUED
BY NWS SAN ANGELO (WWUS35 KSJT).
Special weather statement, May 21, 12:29 PM CDT, 4 hours 2 minutes before
NMZ027>029-TXZ045>048-050>052-057>063-067>070-074-075-079>082-220500-

THUNDERSTORM OUTLOOK...CORRECTED TIME
NATIONAL WEATHER SERVICE MIDLAND-ODESSA TX
1229 PM CDT FRI MAY 21 1999

THIS OUTLOOK PERTAINS TO THE FOLLOWING COUNTIES IN WEST TEXAS:

ANDREWS   CULBERSON  GLASSCOCK   MARTIN    REAGAN   UPTON
BORDEN    DAWSON     HOWARD      MIDLAND   REEVES   WARD
BREWSTER  ECTOR      JEFF DAVIS  PECOS     SCURRY   WINKLER
CRANE     GAINES     LOVING      PRESIDIO  TERRELL

AND IN SOUTHEAST NEW MEXICO:

EDDY      LEA

SYNOPSIS: A FRONTAL BOUNDARY REMAINS NEARLY STATIONARY ACROSS
THE NORTHERN PORTIONS OF THE PERMIAN BASIN EARLY THIS AFTERNOON.
ISOLATED THUNDERSTORM DEVELOPMENT MAY OCCUR ALONG AND TO THE NORTH
OF THIS BOUNDARY LATE THIS AFTERNOON OR THIS EVENING...GENERALLY
ALONG AND NORTH OF A CARLSBAD TO ANDREWS TO BIG SPRING LINE.

THE AIRMASS WILL BE MODERATELY MOIST AND UNSTABLE ACROSS THIS AREA.
STORMS THAT DO DEVELOP MAY BECOME SEVERE WITH THE POSSIBILITY OF
LARGE HAIL.

DUE TO THE ISOLATED NATURE OF THESE THUNDERSTORMS...SPOTTER
ACTIVATION IS NOT ANTICIPATED.

FOR THE WEST CENTRAL TEXAS OUTLOOK SEE THE PRODUCT LBBSPSSJT ISSUED
BY NWS SAN ANGELO (WWUS35 KSJT).

The office that day

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

IssuedProductOfficeCountiesLasted
May 21, 4:49 PM CDTSevere Thunderstorm WarningMAFJeff Davis56 min
May 21, 5:15 PM CDTSevere Thunderstorm WarningMAFBrewster60 min
May 21, 6:13 PM CDTSevere Thunderstorm WarningMAFBrewster, Pecos62 min
May 21, 6:39 PM CDTFlash Flood WarningMAFBrewster2 hr
May 21, 6:58 PM CDTSevere Thunderstorm WarningMAFBrewster47 min

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.