Alert archive / Texas / Wind Advisories in 2009
Wind Advisory 12, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this wind advisory at Dec 23, 2009, 9:32 PM CST for 23 counties in Texas. It took effect at Dec 24, 2009, 6:00 AM CST. It was in force for 21 hr.
The area
The counties it named.
The facts
- Issued
- Dec 23, 2009, 9:32 PM CST (03:32 UTC)
- In effect from
- Dec 24, 2009, 6:00 AM CST
- Expired
- Dec 25, 2009, 3:27 AM CST
- In force
- 21 hr
- Issued by
- NWS Houston/Galveston, TX
All 23 counties
Austin County, TX, Brazoria County, TX, Brazos County, TX, Burleson County, TX, Chambers County, TX, Colorado County, TX, Fort Bend County, TX, Galveston County, TX, Grimes County, TX, Harris County, TX, Houston County, TX, Jackson County, TX, Liberty County, TX, Madison County, TX, Matagorda County, TX, Montgomery County, TX, Polk County, TX, San Jacinto County, TX, Trinity County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX
The radar
The Houston radar (KHGX), 91 km from the middle of the area, began a volume at 03:35 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, 3.5 hours before the alert went out and 242 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
- 1390 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 475 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 183 m²/s²
- 0-3 km storm-relative helicity
- 158 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 6.0
What forecasters said that day
The local office's own words before this wind advisory 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 wind advisory went out at Dec 23, 5:28 PM CST, 4 hours 4 minutes earlier.
Area forecast discussion, Dec 23, 5:28 PM CST, 4 hours 4 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Hazardous weather outlook, Dec 23, 3:17 PM CST, 6 hours 15 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 317 PM CST WED DEC 23 2009 GMZ330-335-350-355-370-375-TXZ163-164-176>179-195>200-210>214-226- 227-235>238-241400- 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- 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-WHARTON- 317 PM CST WED DEC 23 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS. ...SLIGHT RISK OF SEVERE THUNDERSTORMS TONIGHT... ...WINDY ON THURSDAY... .DAY ONE...TONIGHT A STRONG UPPER LEVEL STORM SYSTEM AND COLD FRONT WILL BE MOVING INTO THE AREA FROM THE WEST TONIGHT. EXPECT A SQUALL LINE TO DEVELOP AND MOVE QUICKLY WEST TO EAST ACROSS THE AREA BETWEEN MIDNIGHT AND 7 AM. THE PRIMARY WEATHER THREAT WILL BE STRONG DAMAGING WINDS. HAIL AND ISOLATED TORNADOS ARE ALSO POSSIBLE. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY STRONG WINDS ARE EXPECTED BEHIND THE COLD FRONT ON THURSDAY. SUSTAINED 20 TO 30 MPH WINDS ARE POSSIBLE FROM THE WEST NORTHWEST WITH HIGHER GUSTS POSSIBLE. A WIND ADVISORY WILL PROBABLY BE REQUIRED FOR PORTIONS OF SOUTHEAST TEXAS. MOTORIST TRAVELING ON NORTH TO SOUTH ORIENTED ROADS SHOULD BE CAUTIOUS. HOLIDAY DECORATIONS IN YARDS THAT ARE NOT TIED DOWN WILL ALSO BE SUSCEPTIBLE TO THE STRONG WINDS. OTHERWISE...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TONIGHT.
In the hours before
Special weather statement, Dec 23, 5:04 PM CST, 4 hours 28 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
504 PM CST WED DEC 23 2009
TXZ163-177-240000-
HOUSTON-WALKER-
504 PM CST WED DEC 23 2009
...SPECIAL WEATHER STATEMENT...
AT 458 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 23 MILES SOUTH OF CROCKETT...MOVING NORTH NORTH
EAST AT 30 MPH.
THE STORM HAS A HISTORY OF ROTATION AND COULD INTENSIFY. PEA SIZE
HAIL...WINDS GREATER THAN 40 MPH...ARE POSSIBLE WITH THIS STORM.
LOCATIONS IN THE PATH OF THIS STORM INCLUDE...LOVELADY...LATEXO...
GRAPELAND AND CROCKETT.
GUSTY WINDS MAY CAUSE UNSECURED SMALL OBJECTS SUCH AS TRASH CANS TO
BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS
PASSED.
LAT...LON 3154 9549 3146 9522 3108 9541 3106 9544
3102 9544 3091 9549 3097 9567 3100 9568
3102 9566 3103 9566 3104 9562 3109 9565
TIME...MOT...LOC 2303Z 200DEG 30KT 3104 9555The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 23, 6:01 PM CST | Severe Thunderstorm Warning | HGX | Houston | 44 min |
| Dec 23, 9:45 PM CST | Areal Flood Advisory | HGX | Austin, Grimes, Waller, Washington | 2 hr |
| Dec 23, 11:05 PM CST | Areal Flood Advisory | HGX | Grimes, Houston, Madison, Montgomery, San Jacinto, Trinity and 2 more | 115 min |
| Dec 23, 11:19 PM CST | Severe Thunderstorm Warning | HGX | Houston, Trinity | 21 min |
| Dec 24, 3:40 AM CST | Special Marine Warning | HGX | 2 hr | |
| Dec 24, 9:55 AM CST | Gale Warning | HGX | 17 hr |
Nearby
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.