Alert archive / Texas / Flash Flood Warnings in 2010
Flash Flood Warning 18, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this flash flood warning at Jul 2, 2010, 5:22 PM CDT for Harris County, Montgomery 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
- Jul 2, 2010, 5:22 PM CDT (22:22 UTC)
- Expired
- Jul 2, 2010, 8:15 PM CDT
- In force
- 3 hr
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
- Flood severity
- None
Counties Harris County, TX, Montgomery County, TX
The radar
The Houston radar (KHGX), 76 km from the middle of the area, began a volume at 22:25 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, 10.4 hours before the alert went out and 320 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
- 3047 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 477 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Jul 2, 3:40 PM CDT, 1 hour 42 minutes earlier.
Area forecast discussion, Jul 2, 3:40 PM CDT, 1 hour 42 minutes before
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</html>Hazardous weather outlook, Jul 2, 10:21 AM CDT, 7 hours 1 minute before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 1021 AM CDT FRI JUL 2 2010 TXZ163-164-176>179-195>200-214-030100- BRAZOS-BURLESON-CHAMBERS-GRIMES-HOUSTON-LIBERTY-MADISON- MONTGOMERY-POLK-SAN JACINTO-TRINITY-WALKER-WASHINGTON- 1021 AM CDT FRI JUL 2 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS. .DAY ONE...TODAY AND TONIGHT WIDESPREAD SHOWERS AND THUNDERSTORMS ARE EXPECTED ACROSS THE AREA AS A DEEP TROPICAL AIR MASS REMAINS OVER SOUTHEAST TEXAS. SOME OF THE STRONGER THUNDERSTORMS WILL BE CAPABLE OF PRODUCING LOCALLY HEAVY RAINS. RAINFALL AMOUNTS SHOULD AVERAGE AROUND AN INCH WITH SOME HEAVIER TOTALS BETWEEN 1 AND 3 INCHES. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY LINGERING TROPICAL MOISTURE WILL HELP TO KEEP A CHANCE OF RAIN IN THE FORECAST THROUGH THE WEEKEND FOR SOUTHEAST TEXAS. .SPOTTER INFORMATION STATEMENT... EMERGENCY MANAGERS SHOULD PREPARE FOR AREAS OF HEAVY RAIN AND POSSIBLE FLOODING. TXZ210>213-226-227-235>238-030100- AUSTIN-BRAZORIA-COLORADO-FORT BEND-GALVESTON-HARRIS-JACKSON- MATAGORDA-WALLER-WHARTON- 1021 AM CDT FRI JUL 2 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS. .DAY ONE...TODAY AND TONIGHT A VERY MOIST TROPICAL AIR MASS OVER THE AREA AND A WEAK BOUNDARY DRAPED OVER THE AREA WILL LEAD TO A THREAT OF HEAVY RAINFALL. A FLOOD WATCH IS IN EFFECT UNTIL NOON FOR THE AREAS MAINLY SOUTH OF THE I 10 CORRIDOR. AVERAGE ACCUMULATIONS BETWEEN 1 AND 2 INCHES WITH ISOLATED TOTALS OF 3 TO 5 INCHES CAN BE EXPECTED. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY AN AREA OF DISTURBED WEATHER IS EXPECTED TO DEVELOP IN THE EASTERN GULF AND DRIFT WEST POSSIBLY BRING MORE RAINS ON TUESDAY. ANOTHER AREA OF LOW PRESSURE MAY DEVELOP WITH A TROPICAL WAVE OVER THE CARIBBEAN ON SUNDAY OR MONDAY. .SPOTTER INFORMATION STATEMENT... EMERGENCY MANAGERS SHOULD PREPARE FOR AREAS OF HEAVY RAIN AND POSSIBLE FLOODING TODAY.
In the hours before
Local storm report, Jul 2, 4:52 PM CDT, 30 minutes before
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</html>The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 1, 7:26 PM CDT | Areal Flood Advisory | HGX | Jackson, Matagorda, Wharton | 2 hr |
| Jul 1, 9:05 PM CDT | River Flood Warning | HGX | Brazoria, Fort Bend, Wharton | 20 hr |
| Jul 1, 10:39 PM CDT | Areal Flood Advisory | HGX | Brazoria, Matagorda | 111 min |
| Jul 1, 11:43 PM CDT | Flash Flood Warning | HGX | Brazoria | 3 hr |
| Jul 1, 11:49 PM CDT | Areal Flood Advisory | HGX | Matagorda | 116 min |
| Jul 2, 10:19 AM CDT | Areal Flood Advisory | HGX | Grimes, Harris, Montgomery, Waller | 3 hr |
| Jul 2, 10:39 AM CDT | Areal Flood Advisory | HGX | Brazoria, Jackson, Matagorda | 111 min |
| Jul 2, 11:36 AM CDT | Flash Flood Warning | HGX | Brazoria | 114 min |
| Jul 2, 12:22 PM CDT | Flash Flood Warning | HGX | Matagorda | 113 min |
| Jul 2, 12:32 PM CDT | Areal Flood Advisory | HGX | Harris | 118 min |
| Jul 2, 1:27 PM CDT | Flash Flood Warning | HGX | Brazoria | 3 hr |
| Jul 2, 1:47 PM CDT | Severe Thunderstorm Warning | HGX | Brazoria, Fort Bend, Galveston, Harris | 28 min |
| Jul 2, 2:14 PM CDT | Severe Thunderstorm Warning | HGX | Brazoria, Fort Bend, Galveston, Harris | 31 min |
| Jul 2, 2:17 PM CDT | Areal Flood Advisory | HGX | Brazoria, Fort Bend, Harris | 3 hr |
| Jul 2, 2:33 PM CDT | Flash Flood Warning | HGX | Harris | 3 hr |
| Jul 2, 3:33 PM CDT | River Flood Warning | HGX | Harris | 6 days |
| Jul 2, 3:33 PM CDT | River Flood Warning | HGX | Harris | 18 hr |
| Jul 2, 3:39 PM CDT | River Flood Warning | HGX | Brazoria, Fort Bend | 17 hr |
| Jul 2, 3:54 PM CDT | River Flood Warning | HGX | Harris | 17 hr |
| Jul 2, 4:32 PM CDT | Flash Flood Warning | HGX | Brazoria, Fort Bend | 3 hr |
| Jul 2, 4:53 PM CDT | River Flood Warning | HGX | Harris | 17 hr |
| Jul 2, 5:23 PM CDT | River Flood Warning | HGX | Galveston, Harris | 6 days |
| Jul 2, 5:23 PM CDT | River Flood Warning | HGX | Galveston, Harris | 16 hr |
| Jul 2, 5:42 PM CDT | River Flood Warning | HGX | Harris | 15 hr |
| Jul 2, 6:24 PM CDT | River Flood Warning | HGX | Harris | 15 hr |
| Jul 2, 6:30 PM CDT | River Flood Warning | HGX | Harris | 15 hr |
Nearby
Flash Flood Warnings in Texas, 2010Every flash flood warning in 2010
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.