Alert archive / Texas / Flash Flood Warnings in 1998
Flash Flood Warning 67, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this flash flood warning at Oct 4, 1998, 6:52 PM CDT for Galveston County, Harris County, Texas. It was in force for 118 min. 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 4, 1998, 6:52 PM CDT (23:52 UTC)
- Expired
- Oct 4, 1998, 8:50 PM CDT
- In force
- 118 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties
Counties Galveston County, TX, Harris County, TX
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 11.9 hours before the alert went out and 193 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
- 2319 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 724 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KHOU 042351 FFWHOU TXC167-201-050150- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 652 PM CDT SUN OCT 4 1998 THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHERN GALVESTON COUNTY IN SOUTHEASTERN TEXAS SOUTHERN AND EASTERN HARRIS COUNTY IN SOUTHEASTERN TEXAS * UNTIL 850 PM CDT * AT 645 PM CDT... RADAR AND SPOTTERS INDICATED THUNDERSTORMS WITH VERY HEAVY RAIN OVER NORTHERN GALVESTON COUNTY...AND SOUTHERN AND EASTERN PORTIONS OF HARRIS COUNTY ... MOVING NORTHEAST 10 MPH. * RADAR AND SURFACE REPORTS SHOW THAT A LARGE PORTION OF NORTHERN GALVESTON AND SOUTHERN HARRIS COUNTY HAVE RECEIVED 4 OR MORE INCHES OF RAIN SINCE 400 PM. ANOTHER 1 TO 3 INCHES OF RAIN IS POSSIBLE THROUGH 830 PM. EXPECT WIDESPREAD STREET FLOODING AND ISOLATED OVERFLOWS OF SOME CREEKS AND BAYOUS IN THE AREA. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER lTO RECOGNIZE THE DANGERS OF FLASH FLOODING. DO NOT DRIVE INTO FLOOD WATERS. THE DEPTH MAY BE TOO GREAT TO CROSS SAFELY.
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 4, 2:40 PM CDT, 4 hours 12 minutes earlier.
Area forecast discussion, Oct 4, 2:40 PM CDT, 4 hours 12 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 240 PM CDT SUN OCT 4 1998 STRONG MOISTURE CONVERGENCE ACRS FA BEING ENHANCED BY UPR LVL S/W AND WEAK DIFFLUENT FLOW TO PRODUCE SCT TO NUMEROUS SHWRS/TSTMS ACRS FA THIS AFTN. ALTHO MDLS CONT TO HINT AT SOME DRYING OUT AND UPR LVL S/W ENERGY WEAKENING & SHIFTING EWD...WILL NOT BUY INTO IT JUST YET AND CONT WITH PERSISTANT POPS THRU MON. INCREASING CHC OF RAIN LIKELY WARRANTED AS ERLY AS MONDAY NGT...ESPECIALLY OVR NRN SECTIONS AS STRONG S/W PUSHES INTO TX AND DRAGS CF TWRD CNTRL TX TUES AFTN. WILL LEAVE AMPLE ROOM FOR TWEAKING OF POPS 4TH PERIOD AS TIMING AND LOCATION OF BEST CONVECTION STILL A LTL UNCERTAIN WITH BEST DYNAMICS LIKELY N-NE OF FA. HOWEVER...WARM/MOIST 30+KT INFLOW NOTED AT 85H WITH INCREASING JET AND STRONG DIFFLUENT FLOW ALOFT SHUD ENHANCE UVV'S ACRS FA BY TUE MRNG AND RESULT IN SCT-NUMEROUS TSTMS ACRS FA BY TUES AFTN WITH PSBLY THREAT OF SVR & HVY RAINS. OTHERWISE... EXPECT CRTN ACTIVITY ON RADAR TO TAPPER OFF DURING THE ERLY EVNG PERIOD BUT THEN REDVLP NEAR THE COAST AND MOVE INLAND AGAIN TWRD MRNG. THUS...LEAVING CHC POPS IN ACRS ERN AND UPR COASTAL SECTIONS TNGT WHERE BEST CONVERGENCE WILL PERSIST. COOLER TMPS EXPECTED ON TUES WITH INCREASING CLDS AND BETTER CHC RAIN. 39 PRELIMS... CLL E/B E/E 076/092 074/088 2335 IAH E/B E/E 076/092 075/088 3334 GLS B/B B/E 079/089 078/087 4334 ERN E/B E/E 075/091 075/087 4334 (LIBERTY/SAN JAC/POLK) SW B/B B/E 076/090 076/088 2223 (JACKSON/MATAGORDA)
In the hours before
Special weather statement, Oct 4, 2:13 PM CDT, 4 hours 39 minutes before
GMZ330-335-350-355-370-375-TXZ163-164-176>179-195>200-210>214-226-227- 235>238-042359- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 213 PM CDT SUN OCT 4 1998 ...TROPICAL FUNNELS AND WATERSPOUTS POSSIBLE THIS AFTERNOON... A MOIST AND UNSTABLE TROPICAL ENVIRONMENT PERSISTS ACROSS SOUTHEAST TEXAS THIS AFTERNOON CREATING AN ENVIRONMENT FAVORABLE FOR TROPICAL FUNNELS AND WATERSPOUTS TO DEVELOPMENT. THOUGH TROPICAL FUNNELS RARELY TOUCH THE GROUND...RESIDENTS SHOULD KEEP AN EYE TO THE SKY SHOULD YOU SEE ONE OF THESE FUNNELS NEARING THE GROUND AND BE PREPARED TO SEEK SHELTER. WATERSPOUTS GENERALLY LAST 7 TO 12 MINUTES AND CAN PRODUCE WINDS IN EXCESS OF 35 KNOTS. MARINERS WHO SPOT A WATERSPOUT SHOULD AVOID THE AREA. THE NATIONAL WEATHER SERVICE WILL CONTINUE TO MONITOR THE RADAR FOR ANY INDICATIONS OF ROTATION AND WILL ISSUE TORNADO WARNINGS OR SPECIAL MARINE WARNINGS IF WARRANTED. STAY TUNED TO NOAA WEATHER RADIO OR YOUR LOCAL MEDIA FOR THE LATEST WEATHER INFORMATION.
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 4, 1:59 PM CDT | Tornado Warning | HGX | Harris | 31 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.