Alert archive / Texas / Rip Current Statements in 2021
Rip Current Statement 21, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this rip current statement at Apr 30, 2021, 3:38 AM CDT for Brazoria County, Galveston County, Matagorda County, Texas. It was in force for 15 hr.
The area
The counties it named.
The facts
- Issued
- Apr 30, 2021, 3:38 AM CDT (08:38 UTC)
- Expired
- Apr 30, 2021, 7:00 PM CDT
- In force
- 15 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 08:37 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 00:00Z, 8.6 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.
- Mixed-layer CAPE
- 1919 J/kg
- Mixed-layer CIN
- -34 J/kg
- Mixed-layer LCL
- 738 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- -55 m²/s²
- 0-3 km storm-relative helicity
- -51 m²/s²
- Significant tornado parameter
- -0.8
- Supercell composite
- -5.8
The text
As transmitted.
906 WHUS44 KHGX 300838 CFWHGX Coastal Hazard Message National Weather Service Houston/Galveston TX 338 AM CDT Fri Apr 30 2021 TXZ436>439-301645- /O.NEW.KHGX.CF.Y.0006.210430T1500Z-210501T0000Z/ /O.NEW.KHGX.RP.S.0021.210430T0838Z-210501T0000Z/ Matagorda Islands-Brazoria Islands-Galveston Island- Bolivar Peninsula- 338 AM CDT Fri Apr 30 2021 ...HIGH RIP CURRENT RISK IN EFFECT THROUGH THIS EVENING... ...COASTAL FLOOD ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 7 PM CDT THIS EVENING... * WHAT...For the Coastal Flood Advisory, minor coastal flooding expected. For the High Rip Current Risk, dangerous rip currents. * WHERE...Matagorda Islands, Brazoria Islands, Galveston Island and Bolivar Peninsula Counties. * WHEN...For the Coastal Flood Advisory, from 10 AM this morning to 7 PM CDT this evening. For the High Rip Current Risk, through this evening. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. Rip currents can sweep even the best swimmers away from shore into deeper water. PRECAUTIONARY/PREPAREDNESS ACTIONS... If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. 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. && $$
1 follow-up statement
619 WHUS44 KHGX 302035 CFWHGX Coastal Hazard Message National Weather Service Houston/Galveston TX 335 PM CDT Fri Apr 30 2021 TXZ436>439-010000- /O.CON.KHGX.CF.Y.0006.000000T0000Z-210501T0000Z/ /O.CON.KHGX.RP.S.0021.000000T0000Z-210501T0000Z/ Matagorda Islands-Brazoria Islands-Galveston Island- Bolivar Peninsula- 335 PM CDT Fri Apr 30 2021 ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... ...HIGH RIP CURRENT RISK REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... * WHAT...For the Coastal Flood Advisory, minor coastal flooding. For the High Rip Current Risk, dangerous rip currents. * WHERE...Brazoria Islands, Matagorda Islands, Bolivar Peninsula and Galveston Island Counties. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. Rip currents can sweep even the best swimmers away from shore into deeper water. PRECAUTIONARY/PREPAREDNESS ACTIONS... If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. && $$
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 9:33 PM CDT | Flash Flood Watch | HGX | Austin, Brazoria, Brazos, Burleson, Chambers, Colorado and 17 more | 55 hr |
| Apr 30, 3:17 AM CDT | Areal Flood Advisory | HGX | Houston, Madison, Trinity, Walker | 3 hr |
| Apr 30, 3:38 AM CDT | Coastal Flood Advisory | HGX | Brazoria, Galveston, Matagorda | 15 hr |
| Apr 30, 3:49 AM CDT | Small Craft Advisory | HGX | 17 hr | |
| Apr 30, 4:05 AM CDT | Special Weather Statement | HGX | Matagorda | 40 min |
| Apr 30, 5:06 AM CDT | Special Weather Statement | HGX | Liberty, Polk, San Jacinto | 39 min |
| Apr 30, 5:08 AM CDT | Special Weather Statement | HGX | Colorado, Wharton | 52 min |
| Apr 30, 5:40 AM CDT | Areal Flood Advisory | HGX | Austin, Grimes, Harris, Montgomery, Waller, Washington | 3 hr |
| Apr 30, 6:01 AM CDT | Flash Flood Warning | HGX | Grimes, Harris, Montgomery, San Jacinto, Walker, Waller | 5 hr |
| Apr 30, 7:05 AM CDT | Areal Flood Advisory | HGX | Liberty, Montgomery, Polk, San Jacinto | 3 hr |
| Apr 30, 8:19 AM CDT | Areal Flood Advisory | HGX | Chambers, Harris, Liberty, Montgomery | 116 min |
| Apr 30, 9:12 AM CDT | Areal Flood Advisory | HGX | Harris, Liberty, Montgomery, Polk, San Jacinto | 2 hr |
| Apr 30, 9:53 AM CDT | Areal Flood Advisory | HGX | Austin, Harris, Waller, Washington | 112 min |
| Apr 30, 11:04 AM CDT | Areal Flood Advisory | HGX | Austin, Brazos, Burleson, Grimes, Harris, Houston and 9 more | 116 min |
Nearby
Rip Current Statements in Texas, 2021Every rip current 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.