Alert archive / Texas / Red Flag Warnings in 2007

Red Flag Warning 6, NWS Houston/Galveston, TX

November 15, 20075 counties in Texas

NWS Houston/Galveston, TX issued this red flag warning at Nov 15, 2007, 2:09 PM CST for 5 counties in 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: Nov 15, 2007, 2:09 PM CST (20:09 UTC)
Expired: Nov 15, 2007, 5:00 PM CST
In force: 3 hr
Issued by: NWS Houston/Galveston, TX

Counties Brazoria County, TX, Chambers County, TX, Galveston County, TX, Jackson County, TX, Matagorda County, TX

The radar

The Houston radar (KHGX), 52 km from the middle of the area, began a volume at 20:13 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.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 8.2 hours before the alert went out and 245 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2156 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: -181 m²/s²
0-3 km storm-relative helicity: 90 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this red flag 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 red flag warning went out at Nov 15, 9:34 AM CST, 4 hours 35 minutes earlier.

Area forecast discussion, Nov 15, 9:34 AM CST, 4 hours 35 minutes before

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Hazardous weather outlook, Nov 15, 4:23 AM CST, 9 hours 46 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
423 AM CST THU NOV 15 2007

TXZ163-164-176>179-195>200-210>214-226-227-235>238-161200-
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-
423 AM CST THU NOV 15 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS.

.DAY ONE...TODAY AND TONIGHT
A WIND ADVISORY IS IN EFFECT UNTIL NOON CST TODAY FOR THE COASTAL
COUNTIES. SUSTAINED WINDS BETWEEN 20 AND 30 MPH WITH HIGHER GUSTS
CAN BE EXPECTED THIS MORNING THOSE AREAS NEAR THE COAST. AS SURFACE
HIGH PRESSURE BUILDS INTO THE AREA FROM THE NORTHWEST THIS AFTERNOON
...THE PRESSURE GRADIENT WILL RELAX WHICH WILL ALLOW FOR WINDS TO
DIMINISH UNDER 20 MPH.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED.

The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 15, 3:02 AM CST	Wind Advisory	HGX	Brazoria, Chambers, Galveston, Jackson, Matagorda	9 hr
Nov 15, 9:29 AM CST	Red Flag Warning	HGX	Austin, Brazoria, Brazos, Burleson, Chambers, Colorado and 12 more	5 hr

Nearby

Red Flag Warnings in Texas, 2007 Every red flag 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.