Alert archive / Texas / Flash Flood Warnings in 1998

Flash Flood Warning 87, NWS Houston/Galveston, TX

October 18, 1998Brazos County, Houston County, Madison County, Texas

NWS Houston/Galveston, TX issued this flash flood warning at Oct 18, 1998, 5:21 AM CDT for Brazos County, Houston County, Madison County, Texas. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Oct 18, 1998, 5:21 AM CDT (10:21 UTC)
Expired
Oct 18, 1998, 10:00 AM CDT
In force
5 hr
Issued by
NWS Houston/Galveston, TX
Area
Whole counties

Counties Brazos County, TX, Houston County, TX, Madison County, TX

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 10.4 hours before the alert went out and 245 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, Fort Worth, TX at 00:00Z on 1998-10-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 165 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, Fort Worth, TX at 00:00Z on 1998-10-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 127 square meters per square second.19395878Sfc1 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
165 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
816 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
127 m²/s²
0-3 km storm-relative helicity
131 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.3

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Houston/Galveston, TX wrote its last area forecast discussion before this flash flood warning went out at Oct 18, 2:50 AM CDT, 2 hours 31 minutes earlier.

Area forecast discussion, Oct 18, 2:50 AM CDT, 2 hours 31 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
250 AM CDT SUN OCT 18 1998

LOOKS LIKE THE SOGGY FORECAST IS HERE TO STAY.  THE HEAVY/PERSISTENT
RAINS OVER SWRN PORTIONS OF THE FA HAVE PRODUCED NUMEROUS REPORTS OF
FLOODING LAST EVENING (AND INTO THIS MORNING).  ADDITIONALLY...THERE
WERE ALSO SOME REPORTS OF FUNNEL CLOUDS/TORNADOES EARLIER TODAY (AND
EVEN TONIGHT).  MEANWHILE...THE LARGE AREA OF MAINLY SHRA CONTINUING
TO SLOWLY MOVE (MORE ELY THAN SE) ACROSS THE AREA.  HOWEVER...ALL OF
THIS SHOULD SHIFT A LITTLE MORE SE TODAY AS THE COLD FRONT CURRENTLY
OVER N TX EDGES A BIT FURTHER SSE.  WITH GOOD UPPER DIVERGENCE PROG-
GED ALONG WITH A DECENT SURGE OF PW (AOA 2") COMBINED WITH PROXIMITY
OF THE FRONT AND AVAILABLE DEEP TROPICAL MOISTURE...HEAVY RAINS WILL
LIKELY CONTINUE THIS FCST PD.  WOULD ALSO LIKE TO ADD THE MENTION OF
"SOME POSSIBLY SEVERE" IN SOME OF THE ZONES BASED MAINLY ON WHAT HAS
ALREADY TRANSPIRED ALONG WITH THE POSSIBILITY OF SOME HEATING OVER S
PARTS OF THE CWA/PROGGED VERTICAL SHEAR/INFLOW.  LOOKING AHEAD...THE
FRONT WILL LIKELY PULL UP STATIONARY OVER AT LEAST THE N HALF OF THE
AREA AS UPPER SUPPORT FADES, AND UPPER LOW REMAINS ANCHORED OVER THE
CA BAJA.  TIMING OF S/Ws FROM THE LOW WILL BE THE TRICKY PART OF THE
FCST, BUT WILL GO AHEAD AND OPT FOR HIGH POPS/ABUNDANT CLOUDS ACROSS
THE BOARD, GIVEN ALL THE OTHER INGREDIENTS IN PLACE.  WILL ALSO KEEP
FFA UP FOR NOW.  WILL GO SLIGHTLY ABOVE MOS TEMPS AS CLOUDS STAY IN.
41

PRELIMS...
CLL  C/C C/C  78/64 76/61 +776  HVY RAINS
IAH  C/C C/C  81/67 78/64 +776  HVY RAINS/POSSIBLY SVR
GLS  E/C C/C  84/76 80/72 8776  HVY RAINS/POSSIBLY SVR

The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 17, 7:08 PM CDTTornado WarningHGXColorado57 min
Oct 17, 8:09 PM CDTSevere Thunderstorm WarningHGXColorado, Wharton61 min
Oct 17, 8:31 PM CDTFlash Flood WarningHGXBrazos, Grimes, Madison, Washington4 hr
Oct 17, 8:31 PM CDTFlash Flood WarningHGXAustin, Colorado4 hr
Oct 17, 8:31 PM CDTFlash Flood WarningHGXHouston4 hr
Oct 17, 9:17 PM CDTSevere Thunderstorm WarningHGXFort Bend, Wharton63 min
Oct 17, 10:52 PM CDTFlash Flood WarningHGXWharton4 hr
Oct 17, 11:57 PM CDTFlash Flood WarningHGXAustin, Colorado3 hr
Oct 18, 12:49 AM CDTTornado WarningHGXHarris, Waller51 min
Oct 18, 2:55 AM CDTFlash Flood WarningHGXAustin, Colorado, Wharton5 hr
Oct 18, 2:55 AM CDTFlash Flood WarningHGXWaller5 hr
Oct 18, 3:36 AM CDTTornado WarningHGXHarris, Waller39 min
Oct 18, 4:10 AM CDTTornado WarningHGXHarris55 min
Oct 18, 4:38 AM CDTFlash Flood WarningHGXHarris, Montgomery3 hr
Oct 18, 5:21 AM CDTFlash Flood WarningHGXBurleson, Washington5 hr
Oct 18, 5:59 AM CDTTornado WarningHGXLiberty, Montgomery31 min
Oct 18, 6:10 AM CDTTornado WarningHGXWaller35 min
Oct 18, 6:33 AM CDTTornado WarningHGXHarris57 min
Oct 18, 7:12 AM CDTFlash Flood WarningHGXLiberty3 hr
Oct 18, 7:29 AM CDTFlash Flood WarningHGXJackson3 hr
Oct 18, 7:40 AM CDTTornado WarningHGXHarris40 min
Oct 18, 7:49 AM CDTTornado WarningHGXLiberty61 min
Oct 18, 8:06 AM CDTFlash Flood WarningHGXAustin, Colorado, Wharton4 hr
Oct 18, 8:06 AM CDTFlash Flood WarningHGXHarris, Montgomery, Waller4 hr
Oct 18, 8:17 AM CDTFlash Flood WarningHGXSan Jacinto4 hr
Oct 18, 8:17 AM CDTFlash Flood WarningHGXFort Bend4 hr
Oct 18, 9:32 AM CDTTornado WarningHGXChambers48 min
Oct 18, 10:01 AM CDTFlash Flood WarningHGXBrazos, Madison, Washington4 hr
Oct 18, 10:01 AM CDTFlash Flood WarningHGXLiberty4 hr
Oct 18, 10:01 AM CDTFlash Flood WarningHGXJackson4 hr
Oct 18, 10:23 AM CDTTornado WarningHGXChambers32 min
Oct 18, 10:41 AM CDTFlash Flood WarningHGXChambers3 hr
Oct 18, 10:57 AM CDTTornado WarningHGXChambers63 min
Oct 18, 10:58 AM CDTTornado WarningHGXLiberty62 min
Oct 18, 11:24 AM CDTFlash Flood WarningHGXBrazoria, Galveston3 hr
Oct 18, 12:02 PM CDTFlash Flood WarningHGXAustin, Fort Bend, Harris, Montgomery, Waller4 hr
Oct 18, 12:02 PM CDTFlash Flood WarningHGXSan Jacinto4 hr
Oct 18, 12:02 PM CDTFlash Flood WarningHGXColorado, Wharton4 hr
Oct 18, 12:23 PM CDTTornado WarningHGXChambers32 min
Oct 18, 2:07 PM CDTFlash Flood WarningHGXChambers, Liberty3 hr
Oct 18, 2:19 PM CDTFlash Flood WarningHGXJackson4 hr
Oct 18, 6:07 PM CDTFlash Flood WarningHGXJackson3 hr

Nearby

Flash Flood Warnings in Texas, 1998Every flash flood warning in 1998

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.