Alert archive / Texas / Flash Flood Warnings in 1998
Flash Flood Warning 110, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this flash flood warning at Nov 12, 1998, 10:32 AM CST for Austin County, Colorado County, Washington 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
- Nov 12, 1998, 10:32 AM CST (16:32 UTC)
- Expired
- Nov 12, 1998, 1:30 PM CST
- In force
- 3 hr
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties
Counties Austin County, TX, Colorado County, TX, Washington County, TX
The radar
The Ft Hood radar (KGRK), 131 km from the middle of the area, began a volume at 16:34 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 12:00Z, 4.5 hours before the alert went out and 259 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
- 1921 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 472 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 193 m²/s²
- 0-3 km storm-relative helicity
- 262 m²/s²
- Significant tornado parameter
- 2.6
- Supercell composite
- 14.3
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 Nov 12, 9:20 AM CST, 1 hour 12 minutes earlier.
Area forecast discussion, Nov 12, 9:20 AM CST, 1 hour 12 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
920 AM CST THU NOV 12 1998
CELL TRAINING OCCURRING THIS MORNING ACROSS WESTERN AND NORTHERN
SECTIONS OF FA...APPEARS THAT BAND IS SHIFTING SOUTHWARD AND LIKELY
TO CONVERGE WITH DEVELOPING CELLS MOVING NORTH ACROSS COASTAL
COUNTIES. FLOOD EVENT INTO FRIDAY NIGHT IS EXPECTED FOR SOUTHEAST
TEXAS AS MAIN UPPER LEVEL ENERGY IS STILL OVER SW U.S./ MEX.
TROPICAL MOISTURE WILL CONTINUE TO PUSH NORTHWARD WITH NEAR 2 INCH
PW EXPECTED ACROSS ALL OF SOUTHEAST TEXAS BY TONIGHT. WILL UPDATE
RAINFALL AMOUNTS WITH FLASH FLOOD STATEMENT TO INCREASE EXPECTED
TOTALS DUE TO EXTREMELY HIGH MOISTURE LEVELS...UPPER LEVEL
DIVERGENCE...AND SLOW MOVEMENT OF MID-UPPER LEVEL TROF.
ONLY CHANGES TO ZONES WILL BE TO UP POPS 1ST PERIOD AND CHANGE
WORDING TO SHWRS AND TSTMS...AS EXPECT ALL OF FORECAST AREA TO GET
RAINFALL BY THIS AFTERNOON.
CCFHOU...
CLL TT 065/058 065$/054 065 +++
IAH TT 065/060 065/059 065 +++
GLS TT 070/067 069/066 069 +++
.HOU...FLASH FLOOD WATCH ENTIRE CWA TODAY THROUGH FRIDAY.
SMALL CRAFT ADVISORY MATAGORDA SHIP CHANNEL TO HIGH ISLAND.
33/40The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 12, 7:53 AM CST | Flash Flood Warning | HGX | Austin, Washington | 3 hr |
| Nov 12, 9:33 AM CST | Flash Flood Warning | HGX | Grimes, Montgomery, Waller | 3 hr |
| Nov 12, 11:21 AM CST | Flash Flood Warning | HGX | Polk, San Jacinto | 3 hr |
| Nov 12, 12:25 PM CST | Flash Flood Warning | HGX | Grimes, Montgomery, Waller | 2 hr |
| Nov 12, 1:34 PM CST | Flash Flood Warning | HGX | Austin, Colorado | 3 hr |
| Nov 12, 1:34 PM CST | Flash Flood Warning | HGX | Washington | 3 hr |
| Nov 12, 3:15 PM CST | Flash Flood Warning | HGX | Liberty, Montgomery, Polk, San Jacinto | 4 hr |
| Nov 12, 3:15 PM CST | Flash Flood Warning | HGX | Harris, Waller | 4 hr |
| Nov 12, 4:41 PM CST | Flash Flood Warning | HGX | Austin, Washington | 3 hr |
| Nov 12, 4:41 PM CST | Flash Flood Warning | HGX | Colorado, Fort Bend, Jackson, Wharton | 3 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; radar from the NEXRAD Level II archive.