Alert archive / Texas / Flash Flood Warnings in 1990

Flash Flood Warning 6, NWS Amarillo, TX

August 16, 1990Castro County, Texas

NWS Amarillo, TX issued this flash flood warning at Aug 16, 1990, 9:11 PM CDT for Castro County, Texas. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Aug 16, 1990, 9:11 PM CDT (02:11 UTC)
Expired
Aug 16, 1990, 11:35 PM CDT
In force
2 hr
Issued by
NWS Amarillo, TX
Area
Whole counties

County Castro County, TX

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 2.2 hours before the alert went out and 93 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, Amarillo Airport, TX at 00:00Z on 1990-08-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 296 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, Amarillo Airport, TX at 00:00Z on 1990-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 square meters per square second.1939Sfc1 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
296 J/kg
Mixed-layer CIN
-65 J/kg
Mixed-layer LCL
1527 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
19 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 KAMA 170212
FFWAMA
TXC069-170615-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
911 PM CDT THU AUG 16 1990
 
THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  115 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN THE TEXAS PANHANDLE
          ...SOUTHEASTERN CASTRO
 
AT 907 PM CDT...NATIONAL WEATHER SERVICE RADAR IN AMARILLO WAS SHOWING
A LINE OF THUNDERSTORMS FROM DIMMITT TO ABERNATHY. THE CASTRO COUNTY
SHERIFFS OFFICE HAS REPORTED 1 TO 2 INCHES OF RAINFALL EARLIER TODAY
1 1/2 MILES SOUTHEAST OF HART.  RADAR ESTIMATES SUGGEST THAT UP TO 4
INCHES MAY HAVE FALLEN EARLIER THIS EVENING IN PARTS OF SOUTHEAST
CASTRO COUNTY.  HEAVY RAIN WAS ALREADY BEING REPORTED WITH THIS NEW
LINE OF STORMS SO FLOODING IS LIKELY.
 
MOVEMENT IS NORTHEAST AT 20 MILES AN HOUR.
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOODS AND FLASH FLOODS.!  IF FLASH FLOODING IS
OBSERVED...ACT QUICKLY.  MOVE UP TO ESCAPE FLOOD WATERS.  DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
TWG

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.

In the hours before

Special weather statement, Aug 16, 6:53 PM CDT, 2 hours 18 minutes before
TXZ001>012-COZ015>017-NMZ005-009-013-OKZ001>004-009-014-021-
KSZ003-006-170045-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE AMARILLO TX
653 PM CDT THU AUG 16 1990

...VERY HEAVY RAINS ARE FALLING FROM OLTON TO TULIA TEXAS EARLY THIS
EVENING...

AT 645 PM CDT...A LINE OF SHOWERS AND THUNDERSTORMS...SOME WITH VERY
HEAVY RAINFALL...STRETCHED FROM JUST WEST OF PAMPA SOUTHWESTWARD TO
TO NEAR LITTLEFIELD IN THE TEXAS SOUTH PLAINS.  THIS LINE HAS MOVED
VERY LITTLE IN THE PAST HOUR.  DUE TO THE SLOW MOVEMENT OF THIS LINE
FLOODING OF LOW LYING AREAS...ROADWAYS...DITCHES...AND SMALL STREAMS
IS LIKELY.  RADAR DERIVED ESTIMATES OF RAINFALL SUGGEST THAT 2 TO 3 INCHES
OF RAIN MAY HAVE FALLEN SINCE 5PM FROM OLTON TO NEAR TULIA.  NO REPORTS
OF FLOODING HAS BEEN RECEIVED AT THE NATIONAL WEATHER SERVICE OFFICE IN
AMARILLO.

ELSEWHERE...SHOWERS AND A FEW THUNDERSTORMS WERE WIDELY SCATTERED ACROSS
EAST CENTRAL NEW MEXICO BETWEEN GALLEGOS AND FORT SUMNER.  OTHER SHOWERS
WERE SCATTERED ACROSS THE STATE LINE SOUTH OF CLOVIS.  MOVEMENT WAS TO
THE NORTHEAST AT 20 MILES AN HOUR.

IF YOU LIVE IN THE SOUTH CENTRAL PART OF THE TEXAS PANHANDLE BE ALERT TO
THE POSSIBCILITY OF HEAVY RAINS THIS EVENING...ESPECIALLY IN SOUTHEASTERN
CASTRO AND SWISHER COUNTIES.  IF WATER IS FLOWING ACROSS THE ROAD DO NOT
DRIVE THROUGH IT.  STAY TUNED TO THIS STATION FOR LATER STATEMENTS.

TWG
Special weather statement, Aug 16, 8:04 PM CDT, 1 hour 7 minutes before
TXZ001>009-NMZ005-009-013-OKZ001>003-170200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
803 PM CDT THU AUG 15 1990

...STRONG THUNDERSTORM IS APPROACHING CHILDRESS TEXAS THIS EVENING...

AT 8PM CDT...NATIONAL WEATHER SERVICE RADAR WAS INDICATING A GROUP OF
THUNDERSTORMS IN THE CHILDRESS TEXAS VICINITY.  AT 745PM CDT THE WEATHER
OBSERVATORY AT THE CHILDRESS AIRPORT REPORTED WIND GUSTS TO 45 MPH.
THESE THUNDERSTORMS WILL LIKELY CONTAIN BRIEF HEAVY DOWNPOURS AND POSSIBLY
SOME SMALL HAIL.  LIGHTNING DETECTION EQUIPMENT WAS ALSO SHOWING A FEW
CLOUD TO GROUND LIGHTNING STRIKES WITH THESE STORMS.

MOVEMENT WAS NORTHEAST AT 25 MILES AN HOUR.

IF THUNDERSTORMS APPROACH YOU SEEK SHELTER INDOORS.  DO NOT USE TELEPHONES
WHEN THUNDERSTORMS ARE OCCURRING UNLESS IT IS AN EMERGENCY.  STAY TUNED TO
THIS STATION FOR LATER STATEMENTS.
TWG
Special weather statement, Aug 16, 8:42 PM CDT, 29 minutes before
TXZ001>012-COZ015>017-NMZ005-009-013-OKZ001>004-009-014-021-
KSZ003-006-170245-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE AMARILLO TX
842 PM CDT THU AUG 16 1990

...THUNDERSTORMS ARE INCREASING IN INTENSITY IN THE SOUTHWEST CORNER
OF THE TEXAS PANHANDLE AND IN THE TEXAS SOUTH PLAINS THIS EVENING...

AT 830 PM CDT...A LINE OF THUNDERSTORMS...SOME WITH HEAVY RAIN...GUSTY
WINDS...AND POSSIBLY SOME SMALL HAIL...WAS LOCATED FROM JUST SOUTH OF
HEREFORD TO 5 MILES WEST OF LUBBOCK.  THIS LINE OF STORMS IS MOVING OVER
GROUND WHICH IS ALREADY SATURATED FROM RAINS OVER THE PAST COUPLE OF
DAYS SO WATCH OUT FOR FLOODING OR PONDING OF WATER ON ROADS...LOW LYING
AREAS...AND SMALL STREAMS.  THIS LINE WILL ALSO LIKELY PRODUCE WIND GUSTS
UP TO 50 MPH IN PLACES.  MOVEMENT WAS NORTHEAST AT 20 MILES AN HOUR.

IF YOU LIVE IN SOUTHEAST CASTRO COUNTY BE ESPECIALLY ALERT TO THE POSSIBILITY
OF FLOODING AS THIS LINE OF STORMS WILL BE MOVING OVER AREAS WHERE UP TO
3 INCHES OF RAIN MAY HAVE FALLEN EARLIER TODAY.  IF WATERS ARE RISING BE
PREPARED TO MOVE TO HIGHER GROUND.

ELSEWHERE...OTHER THUNDERSTORM WERE LOCATED IN NORTHEASTERN CHILDRESS
COUNTY AND IN SOUTHERN HARMON COUNTY OKLAHOMA.  MOVEMENT WAS NORTHEAST AT
25 TO 30 MILES AN HOUR.  AN AREA OF LIGHT RAIN WAS LOCATED BETWEEN
PERRYTON AND MIAMI IN THE NORTHEAST TEXAS PANHANDLE.

STAY TUNED TO THIS STATION FOR LATER STATEMENTS.

TWG

Nearby

Flash Flood Warnings in Texas, 1990Every flash flood warning in 1990

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.