Alert archive / Texas / Rip Current Statements in 2020

Rip Current Statement 60, NWS Houston/Galveston, TX

December 31, 2020Brazoria County, Galveston County, Matagorda County, Texas

NWS Houston/Galveston, TX issued this rip current statement at Dec 31, 2020, 3:11 PM CST for Brazoria County, Galveston County, Matagorda County, Texas. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
Dec 31, 2020, 3:11 PM CST (21:11 UTC)
Expired
Jan 1, 2021, 12:00 AM CST
In force
9 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 21:15 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

Corpus Christi, TX (KCRP), launched 12:00Z, 9.2 hours before the alert went out and 241 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, Corpus Christi, TX at 12:00Z on 2020-12-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 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, Corpus Christi, TX at 12:00Z on 2020-12-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 430 square meters per square second.1939587897117Sfc1 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
418 m above ground
0-6 km bulk shear
74 kt
0-1 km storm-relative helicity
430 m²/s²
0-3 km storm-relative helicity
468 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

Open this sounding in Storm Lab

The text

As transmitted.

806 
WHUS44 KHGX 312111
CFWHGX

Coastal Hazard Message
National Weather Service Houston/Galveston TX
311 PM CST Thu Dec 31 2020

TXZ436>438-010515-
/O.NEW.KHGX.RP.S.0060.201231T2111Z-210101T0600Z/
Matagorda Islands-Brazoria Islands-
Galveston Island and Bolivar Peninsula-
311 PM CST Thu Dec 31 2020

...HIGH RIP CURRENT RISK IN EFFECT UNTIL MIDNIGHT CST TONIGHT...

* WHAT...Dangerous rip currents.

* WHERE...Matagorda Islands, Brazoria Islands and Galveston 
  Island and Bolivar Peninsula Counties.

* WHEN...Until midnight CST tonight.

* IMPACTS...Rip currents can sweep even the best swimmers away 
  from shore into deeper water.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Swim near a lifeguard. If caught in a rip current, relax and
float. Don't swim against the current. If able, swim in a
direction following the shoreline. If unable to escape, face the
shore and call or wave for help.

&&

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 30, 7:31 PM CSTAreal Flood AdvisoryHGXAustin, Colorado, Fort Bend, Waller, Wharton3 hr
Dec 30, 7:56 PM CSTAreal Flood AdvisoryHGXHarris, Montgomery, Waller3 hr
Dec 30, 9:28 PM CSTFlash Flood WarningHGXAustin, Fort Bend, Jackson, Wharton3 hr
Dec 30, 9:32 PM CSTAreal Flood AdvisoryHGXGrimes, Harris, Montgomery, Walker3 hr
Dec 30, 9:36 PM CSTAreal Flood AdvisoryHGXJackson, Matagorda, Wharton3 hr
Dec 30, 11:36 PM CSTAreal Flood AdvisoryHGXAustin, Fort Bend, Waller2 hr
Dec 31, 12:30 AM CSTAreal Flood AdvisoryHGXJackson90 min
Dec 31, 1:14 AM CSTAreal Flood AdvisoryHGXAustin, Waller, Washington2 hr
Dec 31, 7:03 AM CSTAreal Flood AdvisoryHGXColorado, Fort Bend, Jackson, Matagorda, Wharton3 hr
Dec 31, 7:42 AM CSTRiver Flood WarningHGXAustin, Colorado, Fort Bend, Wharton4 days
Dec 31, 8:58 AM CSTSpecial Marine WarningHGX32 min
Dec 31, 9:02 AM CSTSpecial Marine WarningHGX43 min
Dec 31, 9:04 AM CSTSpecial Marine WarningHGX56 min
Dec 31, 9:18 AM CSTSpecial Weather StatementHGXMatagorda42 min
Dec 31, 9:24 AM CSTSpecial Marine WarningHGX51 min
Dec 31, 9:34 AM CSTSpecial Weather StatementHGXChambers56 min
Dec 31, 9:44 AM CSTSpecial Weather StatementHGXMatagorda61 min
Dec 31, 9:45 AM CSTWind AdvisoryHGXBrazoria, Galveston, Matagorda17 hr
Dec 31, 9:52 AM CSTSpecial Weather StatementHGXBrazoria53 min
Dec 31, 9:58 AM CSTSpecial Marine WarningHGX32 min
Dec 31, 10:03 AM CSTSpecial Marine WarningHGX87 min
Dec 31, 10:03 AM CSTSevere Thunderstorm WarningHGXBrazoria29 min
Dec 31, 10:23 AM CSTSpecial Marine WarningHGX52 min
Dec 31, 10:25 AM CSTSpecial Marine WarningHGX95 min
Dec 31, 10:42 AM CSTSpecial Weather StatementHGXChambers48 min
Dec 31, 11:03 AM CSTAreal Flood WarningHGXWaller3 hr
Dec 31, 11:21 AM CSTAreal Flood AdvisoryHGXFort Bend, Harris114 min
Dec 31, 11:25 AM CSTSpecial Marine WarningHGX95 min
Dec 31, 11:31 AM CSTAreal Flood AdvisoryHGXBrazoria, Galveston, Harris3 hr
Dec 31, 11:51 AM CSTFlash Flood WarningHGXBrazoria, Galveston114 min
Dec 31, 11:58 AM CSTSpecial Weather StatementHGXChambers, Galveston, Liberty62 min
Dec 31, 12:57 PM CSTSpecial Marine WarningHGX63 min
Dec 31, 1:09 PM CSTRiver Flood WarningHGXHarris23 hr
Dec 31, 1:26 PM CSTAreal Flood AdvisoryHGXChambers, Galveston, Liberty2 hr
Dec 31, 2:05 PM CSTAreal Flood WarningHGXWaller6 hr
Dec 31, 2:13 PM CSTAreal Flood WarningHGXHarris, Montgomery, Waller10 hr
Dec 31, 2:29 PM CSTAreal Flood WarningHGXBrazoria, Galveston6 hr
Dec 31, 2:38 PM CSTRiver Flood WarningHGXBrazoria, Fort Bend, Wharton8 days
Dec 31, 2:42 PM CSTRiver Flood WarningHGXMatagorda, Wharton43 hr

Nearby

Rip Current Statements in Texas, 2020Every rip current statement 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.