Alert archive / Texas / Flash Flood Warnings in 2006

Flash Flood Warning 50, NWS Houston/Galveston, TX

October 16, 2006Brazoria County, Texas

NWS Houston/Galveston, TX issued this flash flood warning at Oct 16, 2006, 4:01 PM CDT for Brazoria County, Texas. It was in force for 119 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: Oct 16, 2006, 4:01 PM CDT (21:01 UTC)
Expired: Oct 16, 2006, 6:00 PM CDT
In force: 119 min
Issued by: NWS Houston/Galveston, TX
Area: Counties, with a storm outline in the text

County Brazoria County, TX

The radar

The Houston radar (KHGX), 48 km from the middle of the area, began a volume at 21:02 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, 9.0 hours before the alert went out and 240 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: 2542 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 475 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 560 m²/s²
0-3 km storm-relative helicity: 719 m²/s²
Significant tornado parameter: 11.5
Supercell composite: 47.4

Open this sounding in Storm Lab

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 Oct 16, 3:13 PM CDT, 48 minutes earlier.

Area forecast discussion, Oct 16, 3:13 PM CDT, 48 minutes before

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Hazardous weather outlook, Oct 16, 3:47 PM CDT, 14 minutes before

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In the hours before

Local storm report, Oct 16, 11:45 AM CDT, 4 hours 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1145 AM CDT MON OCT 16 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0600 AM     FLASH FLOOD      HOUSTON                 29.77N 95.39W
10/16/2006                   HARRIS             TX   LAW ENFORCEMENT

            *** 2 FATAL *** EVENT TIME IS HIGHLY UNCERTAIN. TWO
            FEMALES DROWNED IN AN SUV AT I-45 AND TELLEPSEN. THE
            VICTIMS WERE DISCOVERED AS FLOOD WATERS BEGAN TO SLOWLY
            RECEDE AND LAW ENFORCEMENT BEGAN TO NOTICE THE TOP OF
            THEIR VEHICLE. THE SUV WAS PULLED OUT OF THE WATER AND
            THE TWO VICTIMS WERE DISCOVERED IN THE BACK OF THE
            VEHICLE.

&&

42

Local storm report, Oct 16, 2:31 PM CDT, 1 hour 30 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 15, 10:44 PM CDT	Flood Watch	HGX	Austin, Brazoria, Brazos, Burleson, Chambers, Colorado and 17 more	21 hr
Oct 15, 11:18 PM CDT	Severe Thunderstorm Warning	HGX	Brazoria	42 min
Oct 15, 11:32 PM CDT	Special Marine Warning	HGX		43 min
Oct 15, 11:42 PM CDT	Tornado Warning	HGX	Brazoria	48 min
Oct 16, 12:17 AM CDT	Special Marine Warning	HGX		28 min
Oct 16, 12:28 AM CDT	Special Marine Warning	HGX		62 min
Oct 16, 12:30 AM CDT	Tornado Warning	HGX	Brazoria	45 min
Oct 16, 12:32 AM CDT	Special Marine Warning	HGX		58 min
Oct 16, 12:55 AM CDT	Flash Flood Warning	HGX	Brazoria	110 min
Oct 16, 12:59 AM CDT	Tornado Warning	HGX	Galveston	31 min
Oct 16, 1:17 AM CDT	Special Marine Warning	HGX		58 min
Oct 16, 1:22 AM CDT	Special Marine Warning	HGX		53 min
Oct 16, 1:29 AM CDT	Tornado Warning	HGX	Galveston	19 min
Oct 16, 1:47 AM CDT	Special Marine Warning	HGX		58 min
Oct 16, 2:11 AM CDT	Tornado Warning	HGX	Chambers	49 min
Oct 16, 2:18 AM CDT	Special Marine Warning	HGX		27 min
Oct 16, 2:19 AM CDT	Special Marine Warning	HGX		56 min
Oct 16, 2:38 AM CDT	Tornado Warning	HGX	Galveston	52 min
Oct 16, 2:54 AM CDT	Tornado Warning	HGX	Chambers	29 min
Oct 16, 3:26 AM CDT	Tornado Warning	HGX	Galveston	26 min
Oct 16, 3:32 AM CDT	Coastal Flood Warning	HGX	Brazoria, Chambers, Galveston, Harris	27 hr
Oct 16, 3:33 AM CDT	Special Marine Warning	HGX		57 min
Oct 16, 4:05 AM CDT	Tornado Warning	HGX	Chambers	40 min
Oct 16, 4:16 AM CDT	Special Marine Warning	HGX		59 min
Oct 16, 4:35 AM CDT	Tornado Warning	HGX	Chambers, Galveston	40 min
Oct 16, 5:02 AM CDT	Flash Flood Warning	HGX	Brazoria, Chambers, Fort Bend, Galveston, Harris, Liberty and 2 more	3 hr
Oct 16, 5:13 AM CDT	Tornado Warning	HGX	Chambers, Galveston	32 min
Oct 16, 5:23 AM CDT	Tornado Warning	HGX	Galveston	22 min
Oct 16, 5:26 AM CDT	Special Marine Warning	HGX		49 min
Oct 16, 5:45 AM CDT	Tornado Warning	HGX	Chambers, Liberty	30 min
Oct 16, 6:02 AM CDT	Tornado Warning	HGX	Harris, Liberty	43 min
Oct 16, 6:15 AM CDT	Tornado Warning	HGX	Liberty	30 min
Oct 16, 6:23 AM CDT	Tornado Warning	HGX	Fort Bend, Harris	52 min
Oct 16, 6:27 AM CDT	Tornado Warning	HGX	Harris, Waller	48 min
Oct 16, 7:08 AM CDT	Tornado Warning	HGX	Harris, Montgomery	52 min
Oct 16, 7:08 AM CDT	Tornado Warning	HGX	Liberty, Montgomery	37 min
Oct 16, 7:18 AM CDT	Flash Flood Warning	HGX	Jackson	117 min
Oct 16, 7:31 AM CDT	Tornado Warning	HGX	Polk, San Jacinto	44 min
Oct 16, 7:43 AM CDT	Flash Flood Warning	HGX	Chambers, Harris, Liberty, Montgomery, San Jacinto, Waller	3 hr
Oct 16, 8:12 AM CDT	Tornado Warning	HGX	Montgomery, San Jacinto	48 min
Oct 16, 8:17 AM CDT	Flash Flood Warning	HGX	Austin, Colorado, Waller	3 hr
Oct 16, 9:30 AM CDT	Flash Flood Warning	HGX	Polk	3 hr
Oct 16, 9:43 AM CDT	Flash Flood Warning	HGX	Burleson	3 hr
Oct 16, 10:32 AM CDT	Tornado Warning	HGX	Harris, Montgomery, Waller	43 min
Oct 16, 10:44 AM CDT	Flash Flood Warning	HGX	Harris, Liberty, Montgomery, San Jacinto, Waller	2 hr
Oct 16, 11:51 AM CDT	Tornado Warning	HGX	Montgomery, San Jacinto	39 min
Oct 16, 12:21 PM CDT	Tornado Warning	HGX	Liberty	24 min
Oct 16, 12:26 PM CDT	Flash Flood Warning	HGX	Polk	4 hr
Oct 16, 12:48 PM CDT	Flash Flood Warning	HGX	Harris, Liberty, Montgomery, San Jacinto, Waller	4 hr
Oct 16, 12:48 PM CDT	Tornado Warning	HGX	Liberty	29 min
Oct 16, 1:22 PM CDT	Special Marine Warning	HGX		2 hr
Oct 16, 2:59 PM CDT	Special Marine Warning	HGX		31 min
Oct 16, 3:12 PM CDT	Special Marine Warning	HGX		93 min
Oct 16, 3:31 PM CDT	Tornado Warning	HGX	Galveston	29 min
Oct 16, 4:30 PM CDT	Flash Flood Warning	HGX	Chambers, Galveston, Harris, Liberty	90 min
Oct 16, 4:52 PM CDT	Special Marine Warning	HGX		113 min
Oct 16, 5:47 PM CDT	Special Marine Warning	HGX		88 min
Oct 16, 6:00 PM CDT	Flash Flood Warning	HGX	Brazoria, Chambers, Galveston	2 hr
Oct 16, 6:37 PM CDT	Special Marine Warning	HGX		53 min

Nearby

Flash Flood Warnings in Texas, 2006 Every flash flood warning in 2006

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.