Alert archive / Texas / Wind Advisories in 2021

Wind Advisory 6, NWS Houston/Galveston, TX

April 17, 2021Brazoria County, Galveston County, Texas

NWS Houston/Galveston, TX issued this wind advisory at Apr 17, 2021, 7:02 PM CDT for Brazoria County, Galveston County, Texas. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Apr 17, 2021, 7:02 PM CDT (00:02 UTC)
Expired
Apr 17, 2021, 10:00 PM CDT
In force
3 hr
Issued by
NWS Houston/Galveston, TX

Counties Brazoria County, TX, Galveston County, TX

The radar

The Houston radar (KHGX), 27 km from the middle of the area, began a volume at 00:02 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 00:00Z, 0.0 hours before the alert went out and 210 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-pSkew-T log-p diagram, Lake Charles Mun, LA at 00:00Z on 2021-04-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lake Charles Mun, LA at 00:00Z on 2021-04-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
752 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
234 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

013 
WWUS74 KHGX 180002
NPWHGX

URGENT - WEATHER MESSAGE
National Weather Service Houston/Galveston TX
702 PM CDT Sat Apr 17 2021

TXZ437>439-180300-
/O.EXP.KHGX.WI.Y.0005.000000T0000Z-210418T0000Z/
/O.NEW.KHGX.WI.Y.0006.210418T0002Z-210418T0300Z/
Brazoria Islands-Galveston Island-Bolivar Peninsula-
Including the cities of Surfside Beach and Galveston
702 PM CDT Sat Apr 17 2021

...WIND ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING...

* WHAT...North winds 15 to 25 mph with gusts up to 30 mph.

* WHERE...Brazoria Islands, Galveston Island and the Bolivar
  Peninsula.

* WHEN...Until 10 PM CDT this evening.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

&&

$$

TXZ338-436-180115-
/O.EXP.KHGX.WI.Y.0005.000000T0000Z-210418T0000Z/
Coastal Galveston-Matagorda Islands-
Including the cities of Texas City, Dickinson, and La Marque
702 PM CDT Sat Apr 17 2021

...WIND ADVISORY HAS EXPIRED...

Sustained winds have fallen below 25 miles per hour and the Wind
Advisory previously in effect has been allowed to expire.

$$

Nearby

Wind Advisories in Texas, 2021Every wind advisory in 2021

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.