Alert archive / Texas / Rip Current Statements in 2017

Rip Current Statement 11, NWS Houston/Galveston, TX

August 7, 20174 counties in Texas

NWS Houston/Galveston, TX issued this rip current statement at Aug 7, 2017, 8:38 AM CDT for 4 counties in Texas. It was in force for 14 hr.

The area

The counties it named.

The facts

Issued
Aug 7, 2017, 8:38 AM CDT (13:38 UTC)
Expired
Aug 7, 2017, 11:00 PM CDT
In force
14 hr
Issued by
NWS Houston/Galveston, TX

Counties Brazoria County, TX, Chambers County, TX, Galveston County, TX, Matagorda County, TX

The radar

The Houston radar (KHGX), 30 km from the middle of the area, began a volume at 13:40 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, 1.6 hours before the alert went out and 219 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 2017-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1620 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, Lake Charles Mun, LA at 12:00Z on 2017-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 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
1620 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
946 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
107 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.1

Open this sounding in Storm Lab

The text

As transmitted.

427 
WHUS44 KHGX 071338
CFWHGX

COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
838 AM CDT MON AUG 7 2017

...HIGH RIP CURRENT RISK IN EFFECT THROUGH THIS EVENING...

.GALVESTON ISLAND BEACH PATROL HAS REPORTED A HIGH RISK OF RIP 
CURRENTS AND HAS RED FLAGS POSTED. BEACH GOERS ARE ADVISED TO 
FOLLOW THE GUIDANCE OF LOCAL BEACH PATROLS. IF YOU DO SWIM, SWIM 
NEAR A LIFE GUARD AND AWAY FROM ANY JETTIES OR PIERS.

TXZ214-236>238-072145-
/O.NEW.KHGX.RP.S.0011.170807T1338Z-170808T0400Z/
BRAZORIA-CHAMBERS-GALVESTON-MATAGORDA-
838 AM CDT MON AUG 7 2017

...HIGH RIP CURRENT RISK IN EFFECT THROUGH THIS EVENING...

THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON HAS ISSUED A
HIGH RIP CURRENT RISK, WHICH IS IN EFFECT THROUGH THIS EVENING. 

* TIMING...THIS MORNING THROUGH 11PM TONIGHT.

* IMPACTS...LIFE THREATENING RIP CURRENTS ARE LIKELY IN THE SURF ZONE.

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
Aug 7, 9:07 AM CDTAreal Flood AdvisoryHGXAustin, Fort Bend, Waller, Wharton53 min
Aug 7, 9:31 AM CDTAreal Flood AdvisoryHGXHarris59 min
Aug 7, 10:00 AM CDTSpecial Weather StatementHGXColorado30 min
Aug 7, 10:25 AM CDTSpecial Weather StatementHGXAustin35 min
Aug 7, 10:48 AM CDTSpecial Weather StatementHGXFort Bend42 min
Aug 7, 11:09 AM CDTSpecial Weather StatementHGXBrazos36 min
Aug 7, 11:26 AM CDTSpecial Weather StatementHGXFort Bend34 min
Aug 7, 11:37 AM CDTSpecial Weather StatementHGXLiberty38 min
Aug 7, 11:58 AM CDTSpecial Weather StatementHGXFort Bend32 min
Aug 7, 12:05 PM CDTSpecial Weather StatementHGXHarris25 min
Aug 7, 12:11 PM CDTSpecial Marine WarningHGX94 min
Aug 7, 12:27 PM CDTSpecial Weather StatementHGXGrimes33 min
Aug 7, 12:34 PM CDTSpecial Weather StatementHGXHarris26 min
Aug 7, 12:55 PM CDTAreal Flood AdvisoryHGXHarris, Montgomery65 min
Aug 7, 12:56 PM CDTSpecial Weather StatementHGXWalker34 min
Aug 7, 1:24 PM CDTSpecial Weather StatementHGXWalker36 min
Aug 7, 1:37 PM CDTSpecial Marine WarningHGX53 min
Aug 7, 1:52 PM CDTSpecial Weather StatementHGXSan Jacinto, Trinity, Walker23 min
Aug 7, 2:13 PM CDTSpecial Weather StatementHGXPolk, Trinity47 min
Aug 7, 2:56 PM CDTSpecial Weather StatementHGXTrinity34 min

Nearby

Rip Current Statements in Texas, 2017Every rip current statement in 2017

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.