Flash Flood Warning 18, NWS Houston/Galveston, TX

Issued

Sep 12, 2000, 7:12 PM CDT (00:12 UTC)

Expired

Sep 12, 2000, 10:15 PM CDT

In force

3 hr

Issued by

NWS Houston/Galveston, TX

Area

Whole counties; the outline is the Mesonet’s reconstruction

County San Jacinto County, TX

The Houston radar (KHGX), 123 km from the middle of the area, began a volume at 00:13 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.

000 
WGUS54 KHGX 130031 COR
FFWHGX
TXC407-130315-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
712 PM CDT TUE SEP 12 2000

THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON TX HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SAN JACINTO COUNTY IN SOUTHEAST TEXAS

* UNTIL 1015 PM CDT

* AT 708 PM CDT...DOPPLER RADAR INDICATED A LARGE THUNDERSTORM FROM
  LAKE LIVINGSTON SOUTHWEST ACROSS COLD SPRING.  THE STORM WAS NEARLY
  STATIONARY. RADAR ESTIMATES UP 5 INCHES OF RAIN HAS FALLEN
  SINCE 5 PM. AN ADDITION 3 INCHES OR MORE IS POSSIBLE BY 9 PM.

* FLOODING IS EXPECTED OVER ROADWAYS IN THE SOUTHERN HALF OF SAN
  JACINTO COUNTY...INCLUDING THE COLD SPRING AREA.

DO NOT CROSS ANY LOCATION WHERE WATER COVERS THE ROAD!

USE EXTRA CAUTION AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DEPTH
AND SPEED OF FLASH FLOOD WATERS.

PLEASE REPORT FLOODING TO THE COUNTY SHERIFF...LOCAL POLICE...OR
DEPARTMENT OF PUBLIC SAFETY. THEY WILL RELAY YOUR REPORT TO THE
NATIONAL WEATHER SERVICE.

LAT...LON 3063 9504 3044 9499 3041 9526 3079 9531

NWS Houston/Galveston, TX wrote its last area forecast discussion before this flash flood warning went out at Sep 12, 3:25 PM CDT, 3 hours 47 minutes earlier.

SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
325 PM CDT TUE SEP 12 2000

DEEP ELY FETCH HAS HELPED TO LIMIT SEABREEZE DEVELOPMENT OVER FAR
WRN PORTIONS OF THE CWA THIS AFTN. ELSE...WIDELY SCT/SCT SH/-TSRA
HAS BEEN THE RULE. OUTFLOWS AND THE DEEP TROPICAL MOISTURE SHOULD
HELP KEEP THE CONVECTION GOING THROUGH THE EVENING. WHILE WE WILL
SEE SOME DECREASE OF THIS PCPN WITH SUNSET...WILL LIKELY KEEP THE
POPS HIGH AS THE CONVECTION DEVELOPING ALONG THE COLD FRONT CONT-
INUES TO WORK IT WAY SOUTH AND THE WAVE IN THE GULF WORKS INLAND.
INGREDIENTS APPEAR TO BE COMING TOGETHER FOR A GOOD SHOT OF RAIN-
PLUS 2" PWS...NO CAP...FAVORABLE WINDS ALOFT...SFC BOUNDARY FOR A
FOCUS AND AN INCOMING SPEED MAX AROUND THE BASE OF THE UPPER TROF
(PER WV LOOPS)- FOR LATE TONIGHT/WED. FROPA (AS IT CAN BE CALLED)
SHOULD BE EARLY WED BUT IT WILL LIKELY BE MORE OF A GRADUAL SHIFT
OF SFC WINDS TO THE EAST, RATHER THAN A MORE PRONOUNCED NORTHERLY
FLOW (WHICH MAY BE THE NEXT FRONT ON FRI). OTHERWISE...ON THE EX-
TENDED WILL KEEP THINGS PRETTY MUCH AS IS. THE ONLY OTHER NOTABLE
OF NOTE IS THAT THE ETA AND MESO-ETA ARE THE ONLY MODELS BRINGING
(AND HOLDING) THE FEATURE IN THE CARIBBEAN INTO THE GULF. 41/45

.KHGX...NONE

VERY PRELIM PRELIMS...
CLL BB 072/090 070/092 069 562
IAH BE 073/090 070/092 069 462
GLS BE 080/088 078/088 076 462

Flash Flood Warnings in Texas, 2000Every flash flood warning in 2000

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.