Alert archive / Texas / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 134, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Jul 14, 2007, 9:44 PM CDT for Harris County, Montgomery County, Texas. It was in force for 15 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
- Jul 14, 2007, 9:44 PM CDT (02:44 UTC)
- Expired
- Jul 14, 2007, 9:59 PM CDT
- In force
- 15 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Counties, with a storm outline in the text
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 02:47 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, 2.7 hours before the alert went out and 216 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
- 1793 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 751 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 193 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.2
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jul 14, 8:48 PM CDT, 56 minutes earlier.
Area forecast discussion, Jul 14, 8:48 PM CDT, 56 minutes before
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</html>Hazardous weather outlook, Jul 14, 5:45 AM CDT, 15 hours 59 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 545 AM CDT SAT JUL 14 2007 GMZ330-335-TXZ163-164-176>179-195>200-210>214-226-227-235>238- 151045- AUSTIN-BRAZORIA-BRAZOS-BURLESON-CHAMBERS-COLORADO-FORT BEND- GALVESTON-GALVESTON BAY-GRIMES-HARRIS-HOUSTON-JACKSON-LIBERTY- MADISON-MATAGORDA-MATAGORDA BAY-MONTGOMERY-POLK-SAN JACINTO- TRINITY-WALKER-WALLER-WASHINGTON-WHARTON- 545 AM CDT SAT JUL 14 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS ARE EXPECTED MAINLY ACROSS THE NORTHERN HALF OF SOUTHEAST TEXAS WHERE A FRONTAL BOUNDARY REMAINS STALLED. AN UPPER LEVEL LOW PRESSURE SYSTEM IS ALSO DEVELOPING OVER THE AREA. THIS WILL ALLOW FOR INCREASED THUNDERSTORM ACTIVITY TODAY AND THROUGH EARLY NEXT WEEK. THE MAIN THREATS WILL BE HEAVY RAINFALL WHERE SOME AREAS COULD SEE 1 TO 3 INCHES WITH ISOLATED HIGHER AMOUNTS. SOME OF THE STRONGER STORMS COULD PRODUCE FLOODING IN LOW LYING AREAS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THUNDERSTORM CHANCES ARE EXPECTED TO INCREASE THROUGH EARLY NEXT WEEK AS AN UPPER LEVEL LOW PRESSURE SYSTEM DEVELOPS OVER EAST TEXAS. THIS LOW PRESSURE SYSTEM WITH GULF MOISTURE WILL CAUSE SCATTERED TO NUMEROUS THUNDERSTORMS ACROSS SOUTHEAST TEXAS. THE BEST CHANCES OF THUNDERSTORMS APPEARS TO BE IN THE SUNDAY THROUGH TUESDAY TIME FRAME. SOME OF THESE STORMS COULD PRODUCE LOCALLY HEAVY RAINFALL. STREET FLOODING AND FLOODING OF LOW LYING AREAS WILL BE POSSIBLE IN SOME OF THESE STRONGER STORMS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED.
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 8:32 PM CDT | Tornado Warning | HGX | Montgomery | 28 min |
| Jul 15, 10:02 AM CDT | Special Marine Warning | HGX | 118 min | |
| Jul 15, 11:07 AM CDT | River Flood Warning | HGX | Brazos, Burleson, Grimes, Washington | 58 hr |
| Jul 15, 11:07 AM CDT | River Flood Warning | HGX | Austin, Brazoria, Fort Bend, Waller | 22 hr |
Nearby
Severe Thunderstorm Warnings in Texas, 2007Every severe thunderstorm warning in 2007
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.