Alert archive / Texas / Flash Flood Warnings in 1998
Flash Flood Warning 45, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this flash flood warning at Sep 10, 1998, 10:09 PM CDT for Brazoria County, Matagorda County, Wharton County, Texas. It was in force for 4 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
- Sep 10, 1998, 10:09 PM CDT (03:09 UTC)
- Expired
- Sep 11, 1998, 2:00 AM CDT
- In force
- 4 hr
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties
Counties Brazoria County, TX, Matagorda County, TX, Wharton County, TX
The radar
The Houston radar (KHGX), 90 km from the middle of the area, began a volume at 03:10 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 00:00Z, 3.2 hours before the alert went out and 207 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
- 4 J/kg
- Mixed-layer CIN
- -114 J/kg
- Mixed-layer LCL
- 501 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 76 m²/s²
- 0-3 km storm-relative helicity
- 170 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 110309 FFWHOU TXC039-157-321-481-110700- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 1009 PM CDT THU SEP 10 1998 THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON HAS ISSUED A * FLASH FLOOD WARNING FOR... BRAZORIA COUNTY IN SOUTHEASTERN TEXAS SOUTHERN FORT BEND COUNTY IN SOUTHEASTERN TEXAS MATAGORDA COUNTY IN SOUTHEASTERN TEXAS WHARTON COUNTY IN SOUTH CENTRAL TEXAS * UNTIL 200 AM CDT * AT 1000 PM CDT... NATIONAL WEATHER SERVICE RADAR INDICATED A CLUSTER OF THUNDERSTORMS WITH VERY HEAVY RAIN CENTERED 5 MILES NORTH OF BAY CITY... MOVING WEST-NORTHWEST AT 15 MPH. A SECOND BAND OF THUNDERSTORMS WAS DEVELOPING FROM NEAR FREEPORT AND EXTENDING OFFSHORE TO THE SOUTHEAST. THIS BAND SHOULD PASS INLAND FROM THE BRAZORIA COUNTY COAST FROM SOUTHEAST TO NORTHWEST. RAINFALL ACCUMULATIONS BETWEEN 10 PM AND 2 AM MAY EXCEED 4 INCHES IN SOME LOCATIONS OF BRAZORIA AND WHARTON COUNTIES. * THIS CLUSTER OF HEAVY TROPICAL SHOWERS AND THUNDERSTORMS WILL CONTINUE TO PRODUCE RAINFALL RATES OF 2 TO 3 INCHES PER HOUR. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLASH FLOODING. STAYb ALERT FOR FLASH FLOODING AND BE PREPARED TO MOVE SHOULD FLOODING THREATEN. DO NOT DRIVE INTO WATER-COVERED ROADWAYS!
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 Sep 10, 8:33 PM CDT, 1 hour 36 minutes earlier.
Area forecast discussion, Sep 10, 8:33 PM CDT, 1 hour 36 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
833 PM CDT THU SEP 10 1998
LATEST UPDATE FROM NHC HAS SHIFTED CENTER OF FRANCES NORTHWARD AND
MUCH CLOSER TO HOME. THIS COINCIDES WELL WITH LATEST SFC/BUOY
REPORTS AND SATL IMAGERY. FA IS GETTING POUNDED BY HEAVY RAINBANDS
WITH EMBEDDED STRONGER TSTMS. SOME OF THE STRONGER CELLS ARE
SHOWING ROTATION ON RADAR. EXPECT THREATS OF FLASH FLOODING AND
ISOLATED TORNADOS TO CONT THRU TNGT...ESPECIALLY OVR THE COASTAL
SECTIONS. WITH FRANCES NOW CLOSER TO FA...TIGHTENING PRES GRADIENT
WILL ALLOW DANGEROUSLY STRONG WNDS TO PERSIST AND EVEN STRENGTHEN
THRU THE NGT AND ON FRI AS THE STORM DRIFTS NNW.
CRNT FCST HAS GOOD HANDLE ON ALL BUT MAYBE WINDS. WOULD LIKE TO
BUMP UP WNDS ALONG COASTAL ZONES FOR NXT TWO PERIODS TO 35 TO 45 MPH
WITH GUST TO 55 TO 65 MPH. ALSO BUMP UP HARRIS COUNTY WINDS FOR NXT
TWO PERIODS TO 20 TO 25 MPH WITH GUST TO 30 TO 40 MPH. RMNG INLAND
ZONES SHUD READ 15 TO 25 MPH WITH MENTION OF HIGHER GUST.
39
PRELIMS...
SKY TEMPS POPS WINDS
CLL E/E E/E 76/85 76/90 *865 15-25GSTY/15-25GSTY FFA
NE C/C E/E 76/85 76/90 *866 15-25GSTY/15-25GSTY FFA
IAH C/C C/C 76/84 76/88 **76 20-25G30-40/20-25G30-40 FFA
GLS C/C C/C 78/83 78/86 **87 35-45G55-65/35-45G55-65 FFAIn the hours before
Special weather statement, Sep 10, 5:25 PM CDT, 4 hours 44 minutes before
TXZ213-214-235>238-102330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 525 PM CDT THU SEP 10 1998 ...VERY HIGH TIDES EXPECTED THIS EVENING... RECENT TRENDS AT TIDE GAUGES ALONG THE UPPER TEXAS COAST INDICATE THAT GALVESTON BEACH FRONT TIDES WILL REACH BETWEEN 5 TO 6 FEET ABOVE THE PREDICTED LEVEL THIS EVENING. HIGH TIDE AT PLEASURE PIER WILL OCCUR AT 829 PM. WATER LEVELS ARE EXPECTED TO REACH BETWEEN 7 AND 8 FEET AT THIS HIGH TIDE. IN ADDITION TO THE HIGH TIDE...EXPECT VERY STRONG WIND GUSTS AS SQUALLS CONTINUE TO PUSH ONSHORE. AT 5 PM...A 55 MPH WIND GUST WAS REPORTED AT HIGH ISLAND. SIMILAR OR SLIGHTLY HIGHER LEVELS ARE EXPECTED DURING THE FOLLOWING HIGH TIDE AT 637 AM...EARLY FRIDAY MORNING.
Special weather statement, Sep 10, 5:25 PM CDT, 4 hours 44 minutes before
TXZ213-214-235>238-102330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 525 PM CDT THU SEP 10 1998 ...VERY HIGH TIDES EXPECTED THIS EVENING... RECENT TRENDS AT TIDE GAUGES ALONG THE UPPER TEXAS COAST INDICATE THAT GALVESTON BEACH FRONT TIDES WILL REACH BETWEEN 5 TO 6 FEET ABOVE THE PREDICTED LEVEL THIS EVENING. HIGH TIDE AT PLEASURE PIER WILL OCCUR AT 829 PM. WATER LEVELS ARE EXPECTED TO REACH BETWEEN 7 AND 8 FEET AT THIS HIGH TIDE. IN ADDITION TO THE HIGH TIDE...EXPECT VERY STRONG WIND GUSTS AS SQUALLS CONTINUE TO PUSH ONSHORE. AT 5 PM...A 55 MPH WIND GUST WAS REPORTED AT HIGH ISLAND. SIMILAR OR SLIGHTLY HIGHER LEVELS ARE EXPECTED DURING THE FOLLOWING HIGH TIDE AT 637 AM...EARLY FRIDAY MORNING.
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 10, 7:13 PM CDT | Flash Flood Warning | HGX | Galveston | 4 hr |
| Sep 10, 8:02 PM CDT | Tornado Warning | HGX | Brazoria, Galveston | 63 min |
| Sep 10, 10:09 PM CDT | Flash Flood Warning | HGX | Fort Bend | 4 hr |
| Sep 11, 12:09 AM CDT | Flash Flood Warning | HGX | Galveston | 4 hr |
| Sep 11, 1:29 AM CDT | Tornado Warning | HGX | Galveston, Harris | 66 min |
| Sep 11, 2:03 AM CDT | Flash Flood Warning | HGX | Brazoria, Fort Bend, Harris | 4 hr |
| Sep 11, 3:31 AM CDT | Tornado Warning | HGX | Galveston | 64 min |
| Sep 11, 4:01 AM CDT | Flash Flood Warning | HGX | Galveston | 4 hr |
| Sep 11, 4:31 AM CDT | Tornado Warning | HGX | Harris | 64 min |
| Sep 11, 4:39 AM CDT | Flash Flood Warning | HGX | Jackson | 4 hr |
| Sep 11, 5:32 AM CDT | Flash Flood Warning | HGX | Grimes, Montgomery, Waller | 4 hr |
| Sep 11, 5:54 AM CDT | Flash Flood Warning | HGX | Harris | 4 hr |
| Sep 11, 6:06 AM CDT | Tornado Warning | HGX | Fort Bend | 64 min |
| Sep 11, 6:18 AM CDT | Tornado Warning | HGX | Harris | 62 min |
| Sep 11, 7:49 AM CDT | Flash Flood Warning | HGX | Brazoria, Galveston | 4 hr |
| Sep 11, 7:49 AM CDT | Flash Flood Warning | HGX | Fort Bend | 4 hr |
| Sep 11, 8:58 AM CDT | Flash Flood Warning | HGX | Harris | 6 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.