Alert archive / Texas / Flash Flood Warnings in 2013
Flash Flood Warning 12, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this flash flood warning at Sep 20, 2013, 10:11 PM CDT for Fort Bend County, Harris 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
- Sep 20, 2013, 10:11 PM CDT (03:11 UTC)
- Expired
- Sep 21, 2013, 12:15 AM CDT
- In force
- 2 hr
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
- Flood severity
- None
Counties Fort Bend County, TX, Harris County, TX
The radar
The Houston radar (KHGX), 54 km from the middle of the area, began a volume at 03:12 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
Lake Charles Mun, LA (KLCH), launched 00:00Z, 3.2 hours before the alert went out and 234 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
- 2607 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 600 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 128 m²/s²
- 0-3 km storm-relative helicity
- 147 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 8.8
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 20, 9:29 PM CDT, 42 minutes earlier.
Area forecast discussion, Sep 20, 9:29 PM CDT, 42 minutes before
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</html>Hazardous weather outlook, Sep 20, 4:46 AM CDT, 17 hours 25 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 446 AM CDT FRI SEP 20 2013 TXZ163-164-176>179-195>200-210>212-226-227-211200- AUSTIN-BRAZOS-BURLESON-COLORADO-FORT BEND-GRIMES-HOUSTON-LIBERTY- MADISON-MONTGOMERY-POLK-SAN JACINTO-TRINITY-WALKER-WALLER- WASHINGTON-WHARTON- 446 AM CDT FRI SEP 20 2013 ...LOCALLY HEAVY RAINFALL POSSIBLE THROUGH SATURDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS. .DAY ONE...TODAY AND TONIGHT EXPECT INCREASING SHOWER AND THUNDERSTORM COVERAGE AS HIGH MOISTURE LEVELS PERSIST AND A SLOW MOVING COLD FRONT SAGS SOUTHWARD ACROSS THE AREA. LOCALLY HEAVY RAINFALL WILL BE POSSIBLE...ESPECIALLY LATER THIS AFTERNOON THROUGH TONIGHT...AND A FLASH FLOOD WATCH MIGHT BE NEEDED. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY SHOWERS AND THUNDERSTORMS ALONG WITH SOME LOCALLY HEAVY RAINFALL ARE EXPECTED ON SATURDAY MORNING AS A SLOW MOVING COLD FRONT SAGS SOUTHWARD TOWARD THE COAST. FOR THIS FRIDAY THROUGH SATURDAY EVENT...RAINFALL TOTALS OF 2 TO 4 INCHES CAN BE EXPECTED WHERE THE BEST CELL TRAINING SETS UP...AND SOME AMOUNTS GREATER THAN 5 INCHES WILL BE POSSIBLE THAT COULD LEAD TO SOME LOCALIZED FLOODING. WE WILL CONTINUE TO MONITOR THE TROPICAL DISTURBANCE IN THE BAY OF CAMPECHE FOR POSSIBLE TROPICAL DEVELOPMENT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED LATER THIS AFTERNOON THROUGH SATURDAY MORNING. GMZ330-335-350-355-370-375-TXZ213-214-235>238-211200- BRAZORIA-CHAMBERS-GALVESTON-GALVESTON BAY-HARRIS-JACKSON- MATAGORDA-MATAGORDA BAY- WATERS FROM FREEPORT TO THE MATAGORDA SHIP CHANNEL 20 NM TO 60 NM- WATERS FROM FREEPORT TO THE MATAGORDA SHIP CHANNEL OUT 20 NM- WATERS FROM HIGH ISLAND TO FREEPORT 20 TO 60 NM- WATERS FROM HIGH ISLAND TO FREEPORT OUT 20 NM- 446 AM CDT FRI SEP 20 2013 ...LOCALLY HEAVY RAINFALL POSSIBLE THROUGH SATURDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS. .DAY ONE...TODAY AND TONIGHT EXPECT INCREASING SHOWER AND THUNDERSTORM COVERAGE AS HIGH MOISTURE LEVELS PERSIST AND A SLOW MOVING COLD FRONT SAGS SOUTHWARD ACROSS THE AREA. LOCALLY HEAVY RAINFALL WILL BE POSSIBLE...ESPECIALLY LATER THIS AFTERNOON UP NORTH AND THEN AREA WIDE TONIGHT...AND A FLASH FLOOD WATCH MIGHT BE NEEDED. ABOVE NORMAL TIDE LEVELS ARE EXPECTED TO PERSIST...AND WATER MAY APPROACH THE LOWEST AND MOST SUSCEPTIBLE BEACHFRONT ROADS RIGHT AROUND HIGH TIDE TODAY. LARGER SURF AND STRONGER RIP CURRENTS CAN ALSO BE EXPECTED. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY SHOWERS AND THUNDERSTORMS ALONG WITH SOME LOCALLY HEAVY RAINFALL ARE EXPECTED ON SATURDAY MORNING AS A SLOW MOVING COLD FRONT SAGS SOUTHWARD TOWARD THE COAST. FOR THIS FRIDAY THROUGH SATURDAY EVENT...RAINFALL TOTALS OF 2 TO 4 INCHES CAN BE EXPECTED WHERE THE BEST CELL TRAINING SETS UP...AND SOME AMOUNTS GREATER THAN 5 INCHES WILL BE POSSIBLE THAT COULD LEAD TO SOME LOCALIZED FLOODING. TIDES WILL BE RUNNING AROUND 1.5 FEET ABOVE NORMAL ON SATURDAY AT BEACHFRONT LOCATIONS. AT THESE LEVELS...WATER MAY APPROACH THE LOWEST AND MOST SUSCEPTIBLE BEACHFRONT ROADS RIGHT AROUND HIGH TIDE ON SATURDAY EVENING. LARGER SURF AND STRONGER RIP CURRENTS CAN ALSO BE EXPECTED. WE WILL CONTINUE TO MONITOR THE TROPICAL DISTURBANCE IN THE BAY OF CAMPECHE FOR POSSIBLE TROPICAL DEVELOPMENT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED LATER THIS AFTERNOON THROUGH SATURDAY MORNING.
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 20, 8:52 PM CDT | Areal Flood Advisory | HGX | Fort Bend, Harris, Montgomery | 113 min |
| Sep 20, 10:11 PM CDT | Small Craft Advisory | HGX | 7 hr | |
| Sep 20, 10:22 PM CDT | River Flood Warning | HGX | Harris | 6 days |
| Sep 20, 11:05 PM CDT | Special Marine Warning | HGX | 40 min | |
| Sep 21, 5:05 AM CDT | Small Craft Advisory | HGX | 44 hr |
Nearby
Flash Flood Warnings in Texas, 2013Every flash flood warning in 2013
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.