Alert archive / Texas / Wind Advisories in 2019
Wind Advisory 18, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this wind advisory at Dec 16, 2019, 5:55 PM CST for Brazoria County, Galveston County, Matagorda County, Texas. It took effect at Dec 16, 2019, 9:00 PM CST. It was in force for 12 hr.
The area
The counties it named.
The facts
- Issued
- Dec 16, 2019, 5:55 PM CST (23:55 UTC)
- In effect from
- Dec 16, 2019, 9:00 PM CST
- Expired
- Dec 17, 2019, 9:00 AM CST
- In force
- 12 hr
- Issued by
- NWS Houston/Galveston, TX
Counties Brazoria County, TX, Galveston County, TX, Matagorda County, TX
The radar
The Houston radar (KHGX), 54 km from the middle of the area, began a volume at 23:53 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, 11.9 hours before the alert went out and 243 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
- 1821 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 539 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 188 m²/s²
- 0-3 km storm-relative helicity
- 205 m²/s²
- Significant tornado parameter
- 1.9
- Supercell composite
- 10.8
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 16, 3:57 PM CST, 1 hour 58 minutes earlier.
Area forecast discussion, Dec 16, 3:57 PM CST, 1 hour 58 minutes before
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</html>The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 16, 4:09 AM CST | Gale Warning | HGX | 32 hr | |
| Dec 16, 4:09 AM CST | Marine Dense Fog Advisory | HGX | 6 hr | |
| Dec 16, 10:44 AM CST | Special Weather Statement | HGX | San Jacinto | 46 min |
| Dec 16, 11:24 AM CST | Special Weather Statement | HGX | Harris | 51 min |
| Dec 16, 11:27 AM CST | Special Weather Statement | HGX | San Jacinto | 48 min |
| Dec 16, 2:16 PM CST | Special Marine Warning | HGX | 59 min |
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.