Alert archive / Texas / Flash Flood Warnings in 1998
Flash Flood Warning 78, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this flash flood warning at Oct 17, 1998, 5:40 PM CDT for Brazos County, Grimes County, Madison 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 counties it named.
The facts
- Issued
- Oct 17, 1998, 5:40 PM CDT (22:40 UTC)
- Expired
- Oct 17, 1998, 8:35 PM CDT
- In force
- 3 hr
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties
Counties Brazos County, TX, Grimes County, TX, Madison County, TX
The nearest sounding before it
Fort Worth, TX (KFWD), launched 12:00Z, 10.7 hours before the alert went out and 261 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.
- Mixed-layer CAPE
- 1219 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 713 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 130 m²/s²
- 0-3 km storm-relative helicity
- 226 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 10.8
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 17, 2:40 PM CDT, 3 hours earlier.
Area forecast discussion, Oct 17, 2:40 PM CDT, 3 hours before
SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
240 PM CDT SAT OCT 17 1998
A VERY COMPLEX AND TRICKY FCST THIS RUN. MDLS RMN IN FAIR AGREEMENT
WITH DRIVING UPR LOW OVR CNTRL PLAINS TOWARD GREAT LAKES REGION BY
MRNG AND SLWLY DRAGGING CF INTO NRN ZONES ERLY SUN AFTN. FNT LOOSES
ITS PUSH AS MID-UPR LVL FLOW GOES MAINLY ZONAL WITH FNT AND NEW UPR
LOW DVLPS OVR BAJA. FNT MAY SAG SLGTLY SWRD SUN NGT BUT SHUD RMN
FOCUS FOR TSTMS ALNG AND OUT AHEAD OF FNT WELL INTO MON. STILL
UNCERTAIN ABOUT TIMING OF FROPA OFF UPR COAST BUT AVN AND ETA DO
SUGGEST SOMETIME LATE MON AFTN. GOOD OVERRUNNING EVENT SETS UP
QUICKLY BEHIND FROPA ALL AREAS WITH MOIST SRLY FLOW AT 85OMB AND
PACIFIC MOIST SW FLOW AT 700MB. SERIES OF WEAK IMPULSES IN THE UPR
LVL JET WILL ENHANCE OVERRUNNING LIFT AND RESULT IN EMBEDDED TSTMS
AND THREAT OF LCLY HVY RAINS ACRS MUCH OF FA SUN NGT-MON. AT THIS
TIME...WILL PLAN ON FROPA WITH CLDS...OVERRUNNING RAINS AND COOLER
TMPS MOST AREAS BY MON AFTN. THIS PATTERN WILL LIKELY PERSIST TILL
BAJA LOW KICKS OUT SOMETIME MID WEEK.
HAVE ALLIGNED TOR WATCH AREA WITH SAME COUNTIES IN FLASH FLOOD WATCH
FOR TNGT. ADD MENTION OF PSBL SVR HERE TNGT. WILL HOLD OFF ON ANY
MENTION OF PSBL SVR ACRS REST OF FA FOR SUN AS MAIN UPR DYNAMICS
APPEARS TO PULL OFF TO NE.
CLL C/C C/C 70/78 64/76 8766 (TOR WATCH HERE TILL 8 PM TNGT)
(FLASH FLOOD WATCH TNGT-SUNDAY...BRAZOS, MADISON, GRIMES, BURLESON,
WASHINGTON, AUSTIN, COLORADO, WALLER)
IAH C/C C/C 74/83 65/78 7876 (LCLY HVY RAIN PSBL TNGT & SUNDAY)
SW E/C C/C 75/83 73/79 6776 (LCLY HVY RAIN PSBL SUNDAY)
(JACKSON,WHARTON2,MATAGORDA)
GLS E/C C/C 77/84 74/80 5676 (BRAZORIA, GALVESTON, CHAMBERS)
39/42In the hours before
Special weather statement, Oct 17, 2:28 PM CDT, 3 hours 12 minutes before
TXZ176-195>198-210>212-180125- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 228 PM CDT SAT OCT 17 1998 ...TORNADO WATCH IN EFFECT FOR WESTERN PORTIONS OF SOUTHEAST TEXAS UNTIL 800 PM CDT... THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WATCH FOR THE WESTERN PORTIONS OF SOUTHEAST TEXAS UNTIL 800 PM CDT. THE COUNTIES INCLUDED IN THIS TORNADO WATCH INCLUDE BRAZOS...BURLESON... GRIMES...MADISON...WASHINGTON...WALLER...AUSTIN...AND COLORADO. SHOWERS AND THUNDERSTORMS IN THE TEXAS HILL COUNTRY CONTINUE TO MOVE EASTWARD AND APPROACH THE COUNTIES IN THE TORNADO WATCH AREA. CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS TO DEVELOP AS THIS ACTIVITY MOVES TOWARD SOUTHEAST TEXAS...AND SOME OF THE SEVERE THUNDERSTORMS WILL BE CAPABLE OF PRODUCING TORNADOES. AGAIN...A TORNADO WATCH HAS BEEN ISSUED FOR THE WESTERN PORTIONS OF SOUTHEAST TEXAS UNTIL 800 PM CDT. STAY TUNED TO NOAA WEATHER RADIO OR OTHER WEAT HER NEWS SOURCES FOR THE LATEST UPDATES CONCERNING THIS DEVELOPING WEATHER SITUATION.
Special weather statement, Oct 17, 2:28 PM CDT, 3 hours 12 minutes before
TXZ176-195>198-210>212-180125- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 228 PM CDT SAT OCT 17 1998 ...TORNADO WATCH IN EFFECT FOR WESTERN PORTIONS OF SOUTHEAST TEXAS UNTIL 800 PM CDT... THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WATCH FOR THE WESTERN PORTIONS OF SOUTHEAST TEXAS UNTIL 800 PM CDT. THE COUNTIES INCLUDED IN THIS TORNADO WATCH INCLUDE BRAZOS...BURLESON... GRIMES...MADISON...WASHINGTON...WALLER...AUSTIN...AND COLORADO. SHOWERS AND THUNDERSTORMS IN THE TEXAS HILL COUNTRY CONTINUE TO MOVE EASTWARD AND APPROACH THE COUNTIES IN THE TORNADO WATCH AREA. CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS TO DEVELOP AS THIS ACTIVITY MOVES TOWARD SOUTHEAST TEXAS...AND SOME OF THE SEVERE THUNDERSTORMS WILL BE CAPABLE OF PRODUCING TORNADOES. AGAIN...A TORNADO WATCH HAS BEEN ISSUED FOR THE WESTERN PORTIONS OF SOUTHEAST TEXAS UNTIL 800 PM CDT. STAY TUNED TO NOAA WEATHER RADIO OR OTHER WEAT HER NEWS SOURCES FOR THE LATEST UPDATES CONCERNING THIS DEVELOPING WEATHER SITUATION.
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 17, 3:43 PM CDT | Tornado Warning | HGX | Brazos, Burleson | 62 min |
| Oct 17, 4:27 PM CDT | Tornado Warning | HGX | Brazos | 58 min |
| Oct 17, 5:03 PM CDT | Tornado Warning | HGX | Grimes, Madison | 47 min |
| Oct 17, 5:57 PM CDT | Severe Thunderstorm Warning | HGX | Madison | 43 min |
| Oct 17, 6:55 PM CDT | Tornado Warning | HGX | Washington | 60 min |
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.