Alert archive / Texas / Wind Advisories in 2020

Wind Advisory 11, NWS Houston/Galveston, TX

December 13, 202018 counties in Texas

NWS Houston/Galveston, TX issued this wind advisory at Dec 13, 2020, 3:16 PM CST for 18 counties in Texas. It took effect at Dec 13, 2020, 6:00 PM CST. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued
Dec 13, 2020, 3:16 PM CST (21:16 UTC)
In effect from
Dec 13, 2020, 6:00 PM CST
Expired
Dec 14, 2020, 4:00 AM CST
In force
10 hr
Issued by
NWS Houston/Galveston, TX

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, Jackson County, TX, Madison County, TX, Matagorda County, TX, Montgomery 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 21:17 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, 9.3 hours before the alert went out and 260 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 12:00Z on 2020-12-13Temperature 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 12:00Z on 2020-12-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 302 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
879 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
302 m²/s²
0-3 km storm-relative helicity
387 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 13, 4:53 AM CSTGale WarningHGX22 hr
Dec 13, 4:53 AM CSTLow Water AdvisoryHGX40 hr
Dec 13, 4:53 AM CSTSmall Craft AdvisoryHGX12 hr
Dec 13, 4:53 AM CSTSmall Craft AdvisoryHGX28 hr
Dec 13, 3:19 PM CSTSpecial Weather StatementHGXBrazoria, Chambers, Galveston, Liberty86 min
Dec 13, 4:28 PM CSTSpecial Marine WarningHGX47 min

Nearby

Wind Advisories in Texas, 2020Every wind advisory in 2020

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.