Alert archive / Texas / Special Weather Statements in 2021
Special Weather Statement, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this special weather statement at Jul 27, 2021, 8:21 PM CDT for Liberty County, San Jacinto County, Texas. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 27, 2021, 8:21 PM CDT (01:21 UTC)
- Expired
- Jul 27, 2021, 9:00 PM CDT
- In force
- 39 min
- Issued by
- NWS Houston/Galveston, TX
Counties Liberty County, TX, San Jacinto County, TX
The radar
The Houston radar (KHGX), 84 km from the middle of the area, began a volume at 01:20 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, 1.4 hours before the alert went out and 162 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
- 1318 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 1022 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
853
WWUS84 KHGX 280121
SPSHGX
Special Weather Statement
National Weather Service Houston/Galveston TX
821 PM CDT Tue Jul 27 2021
TXZ178-199-200-213-300-280200-
San Jacinto TX-Northern Liberty TX-Southern Liberty TX-
Inland Harris TX-Montgomery TX-
821 PM CDT Tue Jul 27 2021
...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL MONTGOMERY...
SOUTHERN SAN JACINTO...CENTRAL LIBERTY AND NORTHEASTERN HARRIS
COUNTIES UNTIL 900 PM CDT...
At 820 PM CDT, Doppler radar was tracking a strong thunderstorm near
Cleveland, moving southwest at 10 mph.
Pea size hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Liberty, Cleveland, Dayton, Shepherd, Splendora, Patton Village,
Roman Forest, Woodbranch, Ames, Daisetta, Coldspring, Hardin, Plum
Grove, Kenefick, North Cleveland, Dayton Lakes, Tarkington Prairie,
Moss Hill and Evergreen.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Heavy rainfall is also occurring with this storm, and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 2999 9473 3020 9530 3062 9524 3036 9468
3011 9459
TIME...MOT...LOC 0120Z 040DEG 7KT 3034 9499
$$The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 9:12 PM CDT | Special Weather Statement | HGX | Chambers | 33 min |
| Jul 27, 9:47 PM CDT | Special Marine Warning | HGX | 58 min |
Nearby
Special Weather Statements in Texas, 2021Every special weather statement 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.