Alert archive / Florida / High Surf Advisories in 2021
High Surf Advisory 4, NWS Mobile, AL
NWS Mobile, AL issued this high surf advisory at Apr 9, 2021, 12:18 PM CDT for Escambia County, Okaloosa County, Santa Rosa County, Florida; Baldwin County, Mobile County, Alabama. It took effect at Apr 10, 2021, 1:00 AM CDT. It was in force for 30 hr.
The area
The counties it named.
The facts
- Issued
- Apr 9, 2021, 12:18 PM CDT (17:18 UTC)
- In effect from
- Apr 10, 2021, 1:00 AM CDT
- Expired
- Apr 11, 2021, 7:00 AM CDT
- In force
- 30 hr
- Issued by
- NWS Mobile, AL
Counties Baldwin County, AL, Mobile County, AL, Escambia County, FL, Okaloosa County, FL, Santa Rosa County, FL
The radar
The Mobile radar (KMOB), 82 km from the middle of the area, began a volume at 17:21 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
Slidell Radar S, LA (KSIL), launched 12:00Z, 5.3 hours before the alert went out and 227 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
- 3311 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 472 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 121 m²/s²
- 0-3 km storm-relative helicity
- 61 m²/s²
- Significant tornado parameter
- 2.0
- Supercell composite
- 8.9
The text
As transmitted.
498 WHUS44 KMOB 091718 CFWMOB Coastal Hazard Message National Weather Service Mobile AL 1218 PM CDT Fri Apr 9 2021 ALZ265-266-FLZ202-204-206-100930- /O.NEW.KMOB.SU.Y.0004.210410T0600Z-210411T1200Z/ /O.CON.KMOB.RP.S.0010.000000T0000Z-210411T2300Z/ Mobile Coastal-Baldwin Coastal-Escambia Coastal- Santa Rosa Coastal-Okaloosa Coastal- 1218 PM CDT Fri Apr 9 2021 ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH SUNDAY AFTERNOON... ...HIGH SURF ADVISORY IN EFFECT FROM 1 AM SATURDAY TO 7 AM CDT SUNDAY... * WHAT...For the High Surf Advisory, large breaking waves of 5 to 7 feet expected in the surf zone. For the High Rip Current Risk, dangerous rip currents. * WHERE...In Alabama, Mobile Coastal and Baldwin Coastal Counties. In Florida, Escambia Coastal, Santa Rosa Coastal and Okaloosa Coastal Counties. * WHEN...For the High Surf Advisory, from 1 AM Saturday to 7 AM CDT Sunday. For the High Rip Current Risk, through Sunday afternoon. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion. Rip currents can sweep even the best swimmers away from shore into deeper water. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced swimmers should remain out of the water due to dangerous surf conditions. 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. && $$
6 follow-up statements
213 WHUS44 KMOB 100235 CFWMOB Coastal Hazard Message National Weather Service Mobile AL 935 PM CDT Fri Apr 9 2021 ALZ265-266-FLZ202-204-206-101400- /O.CON.KMOB.SU.Y.0004.210410T0600Z-210411T1200Z/ /O.CON.KMOB.RP.S.0010.000000T0000Z-210411T2300Z/ Mobile Coastal-Baldwin Coastal-Escambia Coastal- Santa Rosa Coastal-Okaloosa Coastal- 935 PM CDT Fri Apr 9 2021 ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH SUNDAY AFTERNOON... ...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 1 AM SATURDAY TO 7 AM CDT SUNDAY... * WHAT...For the High Surf Advisory, large breaking waves of 5 to 7 feet expected in the surf zone. For the High Rip Current Risk, dangerous rip currents. * WHERE...In Alabama, Baldwin Coastal and Mobile Coastal Counties. In Florida, Santa Rosa Coastal, Okaloosa Coastal and Escambia Coastal Counties. * WHEN...For the High Surf Advisory, from 1 AM Saturday to 7 AM CDT Sunday. For the High Rip Current Risk, through Sunday afternoon. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion. Rip currents can sweep even the best swimmers away from shore into deeper water. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced swimmers should remain out of the water due to dangerous surf conditions. Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. && $$
951 WHUS44 KMOB 100926 CFWMOB Coastal Hazard Message National Weather Service Mobile AL 426 AM CDT Sat Apr 10 2021 ALZ265-266-FLZ202-204-206-101730- /O.CON.KMOB.SU.Y.0004.000000T0000Z-210411T1200Z/ /O.CON.KMOB.RP.S.0010.000000T0000Z-210411T2300Z/ Mobile Coastal-Baldwin Coastal-Escambia Coastal- Santa Rosa Coastal-Okaloosa Coastal- 426 AM CDT Sat Apr 10 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT SUNDAY... ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH SUNDAY AFTERNOON... * WHAT...For the High Surf Advisory, large breaking waves of 5 to 7 feet expected in the surf zone. For the High Rip Current Risk, dangerous rip currents. * WHERE...In Alabama, Baldwin Coastal and Mobile Coastal Counties. In Florida, Santa Rosa Coastal, Okaloosa Coastal and Escambia Coastal Counties. * WHEN...For the High Surf Advisory, from 1 AM Saturday to 7 AM CDT Sunday. For the High Rip Current Risk, through Sunday afternoon. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion. Rip currents can sweep even the best swimmers away from shore into deeper water. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced swimmers should remain out of the water due to dangerous surf conditions. 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. && $$
856 WHUS44 KMOB 101733 CFWMOB Coastal Hazard Message National Weather Service Mobile AL 1233 PM CDT Sat Apr 10 2021 ALZ265-266-FLZ202-204-206-110200- /O.CON.KMOB.SU.Y.0004.000000T0000Z-210411T1200Z/ /O.CON.KMOB.RP.S.0010.000000T0000Z-210411T2300Z/ Mobile Coastal-Baldwin Coastal-Escambia Coastal- Santa Rosa Coastal-Okaloosa Coastal- 1233 PM CDT Sat Apr 10 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT SUNDAY... ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH SUNDAY AFTERNOON... * WHAT...For the High Surf Advisory, large breaking waves of 5 to 7 feet expected in the surf zone. For the High Rip Current Risk, dangerous rip currents. * WHERE...In Alabama, Baldwin Coastal and Mobile Coastal Counties. In Florida, Santa Rosa Coastal, Okaloosa Coastal and Escambia Coastal Counties. * WHEN...For the High Surf Advisory, from 1 AM Saturday to 7 AM CDT Sunday. For the High Rip Current Risk, through Sunday afternoon. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion. Rip currents can sweep even the best swimmers away from shore into deeper water. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced swimmers should remain out of the water due to dangerous surf conditions. Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. && $$
898 WHUS44 KMOB 110227 CFWMOB Coastal Hazard Message National Weather Service Mobile AL 927 PM CDT Sat Apr 10 2021 ALZ265-266-FLZ202-204-206-111200- /O.CON.KMOB.SU.Y.0004.000000T0000Z-210411T1200Z/ /O.CON.KMOB.RP.S.0010.000000T0000Z-210411T2300Z/ Mobile Coastal-Baldwin Coastal-Escambia Coastal- Santa Rosa Coastal-Okaloosa Coastal- 927 PM CDT Sat Apr 10 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT SUNDAY... ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH SUNDAY AFTERNOON... * WHAT...For the High Surf Advisory, large breaking waves up to around 5 feet expected in the surf zone. For the High Rip Current Risk, dangerous rip currents. * WHERE...In Alabama, Baldwin Coastal and Mobile Coastal Counties. In Florida, Santa Rosa Coastal, Okaloosa Coastal and Escambia Coastal Counties. * WHEN...For the High Surf Advisory, until 7 AM CDT Sunday. For the High Rip Current Risk, through Sunday afternoon. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion. Rip currents can sweep even the best swimmers away from shore into deeper water. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced swimmers should remain out of the water due to dangerous surf conditions. 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. && $$
893 WHUS44 KMOB 111000 CFWMOB Coastal Hazard Message National Weather Service Mobile AL 500 AM CDT Sun Apr 11 2021 ALZ265-266-FLZ202-204-206-111800- /O.CON.KMOB.SU.Y.0004.000000T0000Z-210411T1200Z/ /O.CON.KMOB.RP.S.0010.000000T0000Z-210411T2300Z/ Mobile Coastal-Baldwin Coastal-Escambia Coastal- Santa Rosa Coastal-Okaloosa Coastal- 500 AM CDT Sun Apr 11 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT THIS MORNING... ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH THIS AFTERNOON... * WHAT...For the High Surf Advisory, large breaking waves up to around 5 feet expected in the surf zone. For the High Rip Current Risk, dangerous rip currents. * WHERE...In Alabama, Baldwin Coastal and Mobile Coastal Counties. In Florida, Santa Rosa Coastal, Okaloosa Coastal and Escambia Coastal Counties. * WHEN...For the High Surf Advisory, until 7 AM CDT Sunday. For the High Rip Current Risk, through Sunday afternoon. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion. Rip currents can sweep even the best swimmers away from shore into deeper water. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced swimmers should remain out of the water due to dangerous surf conditions. Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. && $$
960 WHUS44 KMOB 111210 CFWMOB Coastal Hazard Message National Weather Service Mobile AL 710 AM CDT Sun Apr 11 2021 ALZ265-266-FLZ202-204-206-112015- /O.EXP.KMOB.SU.Y.0004.000000T0000Z-210411T1200Z/ /O.CON.KMOB.RP.S.0010.000000T0000Z-210411T2300Z/ Mobile Coastal-Baldwin Coastal-Escambia Coastal- Santa Rosa Coastal-Okaloosa Coastal- 710 AM CDT Sun Apr 11 2021 ...HIGH RIP CURRENT RISK REMAINS IN EFFECT UNTIL 6 PM CDT THIS EVENING... ...HIGH SURF ADVISORY HAS EXPIRED... * WHAT...Dangerous rip currents. * WHERE...In Alabama, Baldwin Coastal and Mobile Coastal Counties. In Florida, Santa Rosa Coastal, Okaloosa Coastal and Escambia Coastal Counties. * WHEN...For the High Surf Advisory, until 7 AM CDT Sunday. For the High Rip Current Risk, through Sunday afternoon. * 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 Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 8:11 AM CDT | Special Weather Statement | MOB | Okaloosa | 49 min |
| Apr 9, 8:16 AM CDT | Areal Flood Advisory | MOB | Okaloosa, Santa Rosa | 119 min |
| Apr 8, 10:33 PM CDT | Small Craft Advisory | MOB | 41 hr | |
| Apr 9, 2:57 AM CDT | Severe Thunderstorm Warning | MOB | Mobile | 34 min |
| Apr 9, 3:30 AM CDT | Special Weather Statement | MOB | Mobile | 45 min |
| Apr 9, 3:57 AM CDT | Special Marine Warning | MOB | 93 min | |
| Apr 9, 4:17 AM CDT | Special Weather Statement | MOB | Mobile | 58 min |
| Apr 9, 4:25 AM CDT | Special Marine Warning | MOB | 2 hr | |
| Apr 9, 6:28 AM CDT | Special Marine Warning | MOB | 2 hr | |
| Apr 9, 6:42 AM CDT | Special Marine Warning | MOB | 2 hr | |
| Apr 9, 6:47 AM CDT | Special Weather Statement | MOB | Clarke | 43 min |
| Apr 9, 6:54 AM CDT | Severe Thunderstorm Warning | MOB | Choctaw, Clarke | 38 min |
| Apr 9, 7:02 AM CDT | Severe Thunderstorm Warning | MOB | Choctaw, Clarke, Washington | 43 min |
| Apr 9, 7:45 AM CDT | Severe Thunderstorm Warning | MOB | Clarke, Monroe | 21 min |
| Apr 9, 8:06 AM CDT | Special Weather Statement | MOB | Clarke | 39 min |
| Apr 9, 8:09 AM CDT | Special Marine Warning | MOB | 96 min | |
| Apr 9, 8:28 AM CDT | Special Marine Warning | MOB | 105 min | |
| Apr 9, 9:49 AM CDT | Special Marine Warning | MOB | 54 min | |
| Apr 9, 12:23 PM CDT | Special Weather Statement | MOB | Wilcox | 52 min |
| Apr 9, 2:16 PM CDT | Special Weather Statement | MOB | Wilcox | 44 min |
| Apr 9, 2:18 PM CDT | Special Weather Statement | MOB | Choctaw | 42 min |
| Apr 9, 2:35 PM CDT | Special Weather Statement | MOB | Choctaw | 40 min |
| Apr 9, 2:56 PM CDT | Special Weather Statement | MOB | Crenshaw | 49 min |
Nearby
High Surf Advisories in Florida, 2021High Surf Advisories in Alabama, 2021Every high surf advisory 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.