Alert archive / Texas / Rip Current Statements in 2017

Rip Current Statement 20, NWS Houston/Galveston, TX

November 1, 20174 counties in Texas

NWS Houston/Galveston, TX issued this rip current statement at Nov 1, 2017, 10:23 AM CDT for 4 counties in Texas. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
Nov 1, 2017, 10:23 AM CDT (15:23 UTC)
Expired
Nov 1, 2017, 7:00 PM CDT
In force
9 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 15:25 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, 3.4 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 2017-11-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 31 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 2017-11-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 306 square meters per square second.1939587897Sfc1 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
31 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
714 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
306 m²/s²
0-3 km storm-relative helicity
385 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

As transmitted.

988 
WHUS44 KHGX 011523
CFWHGX

COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1023 AM CDT WED NOV 1 2017

...STRONG RIP CURRENTS EXPECTED ALONG THE UPPER TEXAS COAST TODAY...

.MODERATE ONSHORE FLOW AND ELEVATED SEAS WILL CREATE AN ELEVATED 
RIP CURRENT RISK TODAY.

TXZ214-236>238-012330-
/O.NEW.KHGX.RP.S.0020.171101T1523Z-171102T0000Z/
BRAZORIA-CHAMBERS-GALVESTON-MATAGORDA-
1023 AM CDT WED NOV 1 2017

...HIGH RIP CURRENT RISK IN EFFECT UNTIL 7 PM CDT THIS EVENING...

THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON HAS ISSUED A
HIGH RIP CURRENT RISK, WHICH IS IN EFFECT UNTIL 7 PM CDT THIS
EVENING. 

* TIMING...THROUGH THIS EVENING.

* IMPACTS...STRONG RIP CURRENTS WILL CAUSE HAZARDOUS SWIMMING 
  CONDITIONS AT AREA BEACHES.

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
Nov 1, 5:23 AM CDTSpecial Weather StatementHGXGalveston37 min
Nov 1, 5:45 AM CDTSpecial Weather StatementHGXBrazoria45 min
Nov 1, 6:02 AM CDTSpecial Marine WarningHGX28 min
Nov 1, 6:34 AM CDTSpecial Weather StatementHGXGalveston41 min
Nov 1, 6:49 AM CDTSpecial Marine WarningHGX56 min
Nov 1, 1:25 PM CDTSmall Craft AdvisoryHGX3 hr

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.