Alert archive / Texas / Flash Flood Warnings in 1998
Flash Flood Warning 76, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this flash flood warning at Oct 6, 1998, 6:48 AM CDT for Jackson County, Matagorda County, Wharton County, Texas. It was in force for 2 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 6, 1998, 6:48 AM CDT (11:48 UTC)
- Expired
- Oct 6, 1998, 8:50 AM CDT
- In force
- 2 hr
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties
Counties Jackson County, TX, Matagorda County, TX, Wharton County, TX
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 00:00Z, 11.8 hours before the alert went out and 176 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
- 4778 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 651 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 58 m²/s²
- 0-3 km storm-relative helicity
- 119 m²/s²
- Significant tornado parameter
- 1.7
- Supercell composite
- 8.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KHOU 061148 FFWHOU TXC239-321-481-061350- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 648 AM CDT TUE OCT 6 1998 THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON HAS ISSUED A * FLASH FLOOD WARNING FOR... JACKSON COUNTY IN SOUTHEASTERN TEXAS MATAGORDA COUNTY IN SOUTHEASTERN TEXAS WHARTON COUNTY IN SOUTH CENTRAL TEXAS * UNTIL 850 AM CDT * AT 647 AM CDT... NATIONAL WEATHER SERVICE RADAR INDICATED SHOWERS AND THUNDERSTORMS CONTAINING VERY HEAVY RAIN FROM EAST BERNARD TO WADSWORTH TO VANDERBILT... MOVING EAST AT 10 TO 15 MPH. * RAINFALL RATES WITH THESE AND THUNDERSTORMS ARE AT 2 TO 3 INCHES PER HOUR. AN ADDITIONAL 2 TO 3 INCHES OF R^AIN IS LIKELY WITH THESE STORMS WHICH WILL LIKELY LEAD TO FLASH FLOODING. IF FLASH FLOODING IS OBSERVED...ACT QUICKLY. MOVE TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
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 6, 2:51 AM CDT, 3 hours 57 minutes earlier.
Area forecast discussion, Oct 6, 2:51 AM CDT, 3 hours 57 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 205 AM CDT TUE OCT 6 1998 PLEASE AMEND CLL TEMPS AS WIND SHIFT HAS DROPPED TEMPS RAPIDLY. SEE UPDATED PRELIMS. MDLS ARE IN GENERAL AGREEMENT WITH RAIN TODAY BUT DIVERGE SIGNIFICANTLY FOR TONIGHT AND WED AM. ETA IS THE FASTEST IN DRYING THINGS OUT...WHILE NGM KEEPS THE RAIN GOING INTO WED AM AND PRODUCES AN OVERRUNNING SITUATION. AVN SOLN LEANS CLOSER TO THE ETA BUT ENDS PRECIP SOMETIME THIS EVENING. PW'S ARE FCST TO REMAIN AROUND 2 INCHES TODAY AND COUPLED WITH BROAD DIFFLUENCE ALOFT AND RRQ RAIN APPEARS LIKELY...LOCALLY HEAVY. WOULD LIKE TO EXPAND THE FFA TO COVER THE ENTIRE FCST AREA FOR TODAY. X-SECTIONS SHOW AIR MASS IS SATURATED FROM BOTTOM TO TOP...SO THREAT FOR DOWNBURST WINDS HAS DIMINISHED. WIND SHEAR NOT NEARLY AS IMPRESSIVE AS FCST YESTERDAY SO WILL REMOVE MENTION OF SVR FROM ZONES. MAIN FCST PROBLEM IS WHEN TO END THE RAIN AND THE EFFECTS ON AREA TEMPS. CURRENT THINKING IS TO END PRECIP IN CLL AROUND SUNSET...IAH LATE EVENING AND GLS AFTER MIDNIGHT. HAVE LEANED TOWARD ETA/AVN SOLN FOR WED WHICH DRIES THINGS OUT AND KEEPS TEMPS BELOW 80 DEGREES. 43/42 PRELIMS... CLL T/B U/A 065/055 079/052 +200 1ST PERIOD: LOCALLY HEAVY RAIN TEMPERATURES NEARLY STEADY OR SLOWLY FALLING TO AROUND 60. IAH T/C B/A 076/059 079/052 +400 1ST PERIOD: LOCALLY HEAVY RAIN TEMPERATURES NEARLY STEADY OR SLOWLY FALLING INTO THE 60S. 2ND PERIOD: MAINLY EVENING GLS T/W B/A 086/066 080/060 +6-0 1ST PERIOD: 30 PERCENT THIS MORNING...INCREASING TO 100 PERCENT BY AFTERNOON. LOCALLY HEAVY RAIN THIS AFTERNOON. TEMPERATURES FALLING INTO THE 70S THI^S AFTERNOON.
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 6, 3:36 AM CDT | Flash Flood Warning | HGX | Burleson | 3 hr |
| Oct 6, 4:08 AM CDT | Flash Flood Warning | HGX | Houston | 2 hr |
| Oct 6, 5:24 AM CDT | Flash Flood Warning | HGX | Colorado | 2 hr |
| Oct 6, 5:37 AM CDT | Flash Flood Warning | HGX | Montgomery, Walker | 3 hr |
| Oct 6, 6:10 AM CDT | Flash Flood Warning | HGX | San Jacinto | 2 hr |
| Oct 6, 6:24 AM CDT | Flash Flood Warning | HGX | Trinity | 2 hr |
| Oct 6, 7:15 AM CDT | Tornado Warning | HGX | Fort Bend | 65 min |
| Oct 6, 7:38 AM CDT | Flash Flood Warning | HGX | Liberty | 117 min |
| Oct 6, 7:48 AM CDT | Severe Thunderstorm Warning | HGX | Brazoria, Galveston, Harris | 57 min |
| Oct 6, 8:39 AM CDT | Severe Thunderstorm Warning | HGX | Chambers, Galveston | 61 min |
| Oct 6, 9:39 AM CDT | Severe Thunderstorm Warning | HGX | Chambers, Galveston | 61 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.