Alert archive / Texas / Rip Current Statements in 2018

Rip Current Statement 37, NWS Houston/Galveston, TX

September 15, 2018Brazoria County, Galveston County, Matagorda County, Texas

NWS Houston/Galveston, TX issued this rip current statement at Sep 15, 2018, 3:14 PM CDT for Brazoria County, Galveston County, Matagorda County, Texas. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued
Sep 15, 2018, 3:14 PM CDT (20:14 UTC)
Expired
Sep 15, 2018, 10:00 PM CDT
In force
7 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 20:15 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, 8.2 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 2018-09-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1126 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Corpus Christi, TX at 12:00Z on 2018-09-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 58 square meters per square second.1939Sfc1 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
1126 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
479 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
58 m²/s²
0-3 km storm-relative helicity
57 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

409 
WHUS44 KHGX 152014
CFWHGX

Coastal Hazard Message
National Weather Service Houston/Galveston TX
314 PM CDT Sat Sep 15 2018

...High Risk of Rip Currents Today...

.Galveston Island Beach Patrol is reporting strong rip currents
along area beaches today. Beachgoers should make sure to swim
near a lifeguard if entering the water.

TXZ436>438-160300-
/O.NEW.KHGX.RP.S.0037.180915T2014Z-180916T0300Z/
Brazoria Islands-Galveston Island and Bolivar Peninsula-
Matagorda Islands-
314 PM CDT Sat Sep 15 2018

...HIGH RIP CURRENT RISK IN EFFECT UNTIL 10 PM CDT THIS EVENING...

The National Weather Service in Houston/Galveston has issued a
High Rip Current Risk, which is in effect until 10 PM CDT this
evening. 

* TIMING...Today.

* IMPACTS...Hazardous swimming conditions will occur along Gulf-
  facing beaches, especially near piers, jetties, and rock groins.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

There is a high risk of rip currents. Life threatening rip
currents are likely in the surf zone.
               
Rip currents are powerful channels of water flowing quickly away
from shore...which occur most often at low spots or breaks in the
sandbar and in the vicinity of structures such as groins...
jetties and piers. Heed the advice of lifeguards...beach patrol...
flags and signs. Swim near a lifeguard.
               
If you become caught in a rip current...yell for help. Remain
calm...do not exhaust yourself and stay afloat while waiting for
help. If you have to swim out of a rip current...swim parallel to
shore and back toward the beach when possible. Do not attempt to
swim directly against a rip current as you will tire quickly.

&&

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 14, 10:26 PM CDTSmall Craft AdvisoryHGX5 hr
Sep 15, 4:16 AM CDTFlash Flood WatchHGXJackson, Matagorda8 hr

Nearby

Rip Current Statements in Texas, 2018Every rip current statement in 2018

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.