Alert archive / Texas / Wind Advisories in 2012

Wind Advisory 13, NWS Houston/Galveston, TX

October 27, 2012Galveston County, Texas

NWS Houston/Galveston, TX issued this wind advisory at Oct 27, 2012, 9:17 AM CDT for Galveston County, Texas. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Oct 27, 2012, 9:17 AM CDT (14:17 UTC)
Expired
Oct 27, 2012, 1:00 PM CDT
In force
4 hr
Issued by
NWS Houston/Galveston, TX

County Galveston County, TX

The radar

The Houston radar (KHGX), 32 km from the middle of the area, began a volume at 14:19 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, 2.3 hours before the alert went out and 180 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 2012-10-27Temperature 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 2012-10-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 square meters per square second.193958Sfc1 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
1092 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
120 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

998 
WWUS74 KHGX 271417
NPWHGX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
917 AM CDT SAT OCT 27 2012

...WIND ADVISORY IN EFFECT UNTIL 1 PM FOR IMMEDIATE COASTAL AREAS
AND GALVESTON ISLAND...

.STRONG COOL NORTHERLY WINDS OF 15 TO 25 MPH WITH GUSTS OF 30 MPH
THROUGH EARLY AFTERNOON.

TXZ238-271800-
/O.NEW.KHGX.WI.Y.0013.121027T1417Z-121027T1800Z/
GALVESTON-
INCLUDING THE CITIES OF...FRIENDSWOOD...GALVESTON...LEAGUE CITY...
TEXAS CITY
917 AM CDT SAT OCT 27 2012

...WIND ADVISORY IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON...

THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON HAS ISSUED A
WIND ADVISORY...WHICH IS IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON.

* TIMING...STRONG NORTHERLY WINDS OF 15 TO 25 MPH WITH GUSTS OF
  AROUND 30 MPH WILL PREVAIL THROUGH EARLY AFTERNOON THEN
  GRADUALLY DIMINISH THIS AFTERNOON.
 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DRIVERS OF VANS...CAMPERS...TRAILERS...AND OTHER HIGH-PROFILE
VEHICLES SHOULD BE ALERT TO THE DANGER OF THESE WINDS...
ESPECIALLY WHEN DRIVING ALONG EAST TO WEST ORIENTED ROADS

&&

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 27, 12:09 AM CDTWind AdvisoryHGXBrazoria, Chambers, Galveston, Jackson, Matagorda6 hr
Oct 27, 8:32 AM CDTSmall Craft AdvisoryHGX8 hr

Nearby

Wind Advisories in Texas, 2012Every wind advisory in 2012

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.