Alert archive / Texas / Flash Flood Warnings in 2013
Flash Flood Warning 5, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this flash flood warning at Apr 27, 2013, 9:57 PM CDT for 4 counties in Texas. It was in force for 108 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 27, 2013, 9:57 PM CDT (02:57 UTC)
- Expired
- Apr 27, 2013, 11:45 PM CDT
- In force
- 108 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
- Flood severity
- None
Counties Brazoria County, TX, Fort Bend County, TX, Harris County, TX, Waller County, TX
The radar
The Houston radar (KHGX), 58 km from the middle of the area, began a volume at 03:00 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, 3.0 hours before the alert went out and 269 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
- 984 J/kg
- Mixed-layer CIN
- -215 J/kg
- Mixed-layer LCL
- 901 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- 13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.4
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 Apr 27, 9:15 PM CDT, 42 minutes earlier.
Area forecast discussion, Apr 27, 9:15 PM CDT, 42 minutes before
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</html>Hazardous weather outlook, Apr 27, 3:55 PM CDT, 6 hours 2 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 355 PM CDT SAT APR 27 2013 TXZ163-164-176>179-195>200-210>214-226-227-235>238-282100- AUSTIN-BRAZORIA-BRAZOS-BURLESON-CHAMBERS-COLORADO-FORT BEND- GALVESTON-GRIMES-HARRIS-HOUSTON-JACKSON-LIBERTY-MADISON-MATAGORDA- MONTGOMERY-POLK-SAN JACINTO-TRINITY-WALKER-WALLER-WASHINGTON- WHARTON- 355 PM CDT SAT APR 27 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS. .DAY ONE...THIS AFTERNOON AND TONIGHT THE MAIN THREAT FOR STRONG TO SEVERE STORMS WILL EXIST MAINLY FROM THE CITY NORTH FROM THIS EVENING THROUGH THE OVERNIGHT TIME PERIOD. ANOTHER ROUND OF RAIN THUNDERSTORMS MAY MOVE...OR EVOLVE... OFF TO THE WEST AND ADVANCE EASTWARD ACROSS OUR REGION DURING THE SUNDAY MORNING HOURS. THE MAIN THREAT WITH THIS ACTIVITY WILL BE LOCALLY HEAVY RAIN LEADING TO FLOODING. THERE MAY ALSO BE HAIL TO THE SIZE OF QUARTERS ASSOCIATED WITH THE HEAVIEST CELLS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY A STALLED FRONTAL BOUNDARY ACROSS SOUTHEAST TEXAS SUNDAY MAY STILL BE A FOCUS FOR CONTINUED THUNDERSTORM DEVELOPMENT THROUGH THE AFTERNOON. INSTABILITY MAY BE SOMEWHAT LIMITED SO THE SEVERE THREAT WILL REMAIN LOW. HOWEVER SHOULD A STORM DEVELOP ALONG THE BOUNDARY THERE MAY BE ENOUGH SUPPORT FOR STORMS TO APPROACH SEVERE LEVELS WITH SMALL HAIL AND GUSTY WINDS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. GMZ330-335-350-355-370-375-282100- GALVESTON BAY-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- 355 PM CDT SAT APR 27 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS. .DAY ONE...THIS AFTERNOON AND TONIGHT HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY A STRONG COLD FRONT IS EXPECTED TO PUSH OFF THE COAST AND THROUGH THE COASTAL WATERS THURSDAY. VERY STRONG WINDS MAY BE POSSIBLE BEHIND THE FRONT WHICH WILL PRODUCE ROUGH SEAS. PLEASE CONTINUE TO MONITOR MARINE FORECASTS FOR THE POSSIBILITY OF ADVISORIES OR GALE WATCHES. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.
In the hours before
Special weather statement, Apr 27, 7:58 PM CDT, 1 hour 59 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
758 PM CDT SAT APR 27 2013
TXZ210-211-226-235-280145-
JACKSON TX-COLORADO TX-AUSTIN TX-WHARTON TX-
758 PM CDT SAT APR 27 2013
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN JACKSON...
SOUTHEASTERN COLORADO...SOUTHEASTERN AUSTIN AND NORTHWESTERN WHARTON
COUNTIES UNTIL 845 PM CDT...
AT 755 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A LINE OF STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM COLUMBUS
TO 13 MILES NORTHWEST OF EL CAMPO TO SPEAKS...OR ALONG A LINE
EXTENDING FROM 13 MILES WEST OF EAGLE LAKE TO 19 MILES WEST OF
WHARTON TO 18 MILES NORTHWEST OF EDNA...AND MOVING EAST AT 10 MPH.
HAIL UP TO THE SIZE OF DIMES AND WIND GUSTS UP TO 40 MPH WILL BE
POSSIBLE WITH THESE STORMS.
LOCATIONS IMPACTED INCLUDE...
EL CAMPO AND EAGLE LAKE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THESE STORMS.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.
&&
LAT...LON 2933 9656 2937 9659 2939 9656 2963 9662
2971 9615 2937 9611 2906 9640 2905 9691
2906 9694
TIME...MOT...LOC 0055Z 265DEG 11KT 2964 9654 2935 9642 2921 9679Local storm report, Apr 27, 8:40 PM CDT, 1 hour 17 minutes before
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</html>Local storm report, Apr 27, 9:47 PM CDT, 10 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 |
|---|---|---|---|---|
| Apr 27, 7:13 PM CDT | Special Weather Statement | HGX | Colorado | 47 min |
| Apr 27, 7:42 PM CDT | River Flood Warning | HGX | Harris | 6 days |
| Apr 27, 7:58 PM CDT | Special Weather Statement | HGX | Colorado, Wharton | 47 min |
| Apr 27, 8:25 PM CDT | Severe Thunderstorm Warning | HGX | Jackson, Wharton | 35 min |
| Apr 27, 8:46 PM CDT | River Flood Warning | HGX | Harris | 6 days |
| Apr 27, 9:09 PM CDT | Special Weather Statement | HGX | Jackson | 51 min |
| Apr 27, 9:44 PM CDT | Areal Flood Advisory | HGX | Jackson, Wharton | 2 hr |
| Apr 27, 9:54 PM CDT | Special Weather Statement | HGX | Houston | 51 min |
| Apr 27, 10:19 PM CDT | Severe Thunderstorm Warning | HGX | Houston, Trinity | 56 min |
| Apr 27, 11:46 PM CDT | Areal Flood Advisory | HGX | Jackson, Wharton | 3 hr |
| Apr 28, 6:25 AM CDT | Special Marine Warning | HGX | 50 min |
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.