Alert archive / Florida / High Surf Advisories in 2021
High Surf Advisory 12, NWS Mobile, AL
NWS Mobile, AL issued this high surf advisory at Aug 31, 2021, 6:04 AM CDT for Baldwin County, Mobile County, Alabama; Escambia County, Okaloosa County, Santa Rosa County, Florida. It took effect at Aug 31, 2021, 7:00 AM CDT. It was in force for 11 hr.
The area
The counties it named.
The facts
- Issued
- Aug 31, 2021, 6:04 AM CDT (11:04 UTC)
- In effect from
- Aug 31, 2021, 7:00 AM CDT
- Expired
- Aug 31, 2021, 6:00 PM CDT
- In force
- 11 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 11:08 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 00:00Z, 11.1 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
- 914 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 811 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 125 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
911 WHUS44 KMOB 311104 CFWMOB Coastal Hazard Message National Weather Service Mobile AL 604 AM CDT Tue Aug 31 2021 ALZ265-266-311915- /O.CAN.KMOB.CF.W.0001.000000T0000Z-210831T1500Z/ /O.NEW.KMOB.SU.Y.0012.210831T1200Z-210831T2300Z/ /O.EXB.KMOB.CF.Y.0005.000000T0000Z-210831T1800Z/ /O.CON.KMOB.SU.W.0003.000000T0000Z-210831T1200Z/ /O.CON.KMOB.RP.S.0024.000000T0000Z-210902T0900Z/ Mobile Coastal-Baldwin Coastal- 604 AM CDT Tue Aug 31 2021 ...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON... ...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 7 AM CDT THIS MORNING... ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH LATE WEDNESDAY NIGHT... ...HIGH SURF ADVISORY IN EFFECT UNTIL 6 PM CDT THIS EVENING... ...COASTAL FLOOD WARNING IS CANCELLED... * WHAT...For the High Surf Warning, dangerously large breaking waves of 8 to 9 feet in the surf zone. For the High Surf Advisory, large breaking waves of 5 to 8 feet expected in the surf zone. For the Coastal Flood Advisory, minor coastal flooding near 2 feet of inundation expected above normally dry ground. For the High Rip Current Risk, dangerous rip currents. * WHERE...Mobile Coastal and Baldwin Coastal Counties. * WHEN...For the High Surf Warning, until 7 AM CDT this morning. For the High Surf Advisory, until 6 PM CDT this evening. For the Coastal Flood Advisory, until 1 PM CDT this afternoon. For the High Rip Current Risk, through late Wednesday night. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. Breaking waves can sweep people off jetties and docks, and into dangerous seas. Life- threatening swimming conditions and significant beach erosion can be 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. Everyone should remain out of the water due to life-threatening surf conditions. Stay off of jetties, piers, and other waterside infrastructure. 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. && $$ ALZ263-264-311800- /O.CAN.KMOB.CF.W.0001.000000T0000Z-210831T1500Z/ /O.EXB.KMOB.CF.Y.0005.000000T0000Z-210831T1800Z/ Mobile Central-Baldwin Central- 604 AM CDT Tue Aug 31 2021 ...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON... ...COASTAL FLOOD WARNING IS CANCELLED... * WHAT...Minor coastal flooding of 2 to 2.5 feet of inundation expected above normally dry ground. * WHERE...Mobile Central and Baldwin Central Counties. * WHEN...Until 1 PM CDT this afternoon. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. PRECAUTIONARY/PREPAREDNESS ACTIONS... If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. && $$ FLZ202-204-206-311915- /O.NEW.KMOB.SU.Y.0012.210831T1200Z-210831T2300Z/ /O.EXT.KMOB.CF.Y.0005.000000T0000Z-210831T1800Z/ /O.CON.KMOB.SU.W.0003.000000T0000Z-210831T1200Z/ /O.CON.KMOB.RP.S.0024.000000T0000Z-210902T0900Z/ Escambia Coastal-Santa Rosa Coastal-Okaloosa Coastal- 604 AM CDT Tue Aug 31 2021 ...COASTAL FLOOD ADVISORY NOW IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON... ...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 7 AM CDT THIS MORNING... ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH LATE WEDNESDAY NIGHT... ...HIGH SURF ADVISORY IN EFFECT UNTIL 6 PM CDT THIS EVENING... * WHAT...For the High Surf Warning, dangerously large breaking waves of 8 to 9 feet in the surf zone. For the High Surf Advisory, large breaking waves of 5 to 8 feet expected in the surf zone. For the Coastal Flood Advisory, minor coastal flooding of near 2 feet of inundation expected above normally dry ground. For the High Rip Current Risk, dangerous rip currents. * WHERE...Escambia Coastal, Santa Rosa Coastal and Okaloosa Coastal Counties. * WHEN...For the High Surf Warning, until 7 AM CDT this morning. For the High Surf Advisory, until 6 PM CDT this evening. For the Coastal Flood Advisory, until 1 PM CDT this afternoon. For the High Rip Current Risk, through late Wednesday night. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. Breaking waves can sweep people off jetties and docks, and into dangerous seas. Life- threatening swimming conditions and significant beach erosion can be 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. Everyone should remain out of the water due to life-threatening surf conditions. Stay off of jetties, piers, and other waterside infrastructure. 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. && $$
3 follow-up statements
886 WHUS44 KMOB 311210 CFWMOB Coastal Hazard Message National Weather Service Mobile AL 710 AM CDT Tue Aug 31 2021 ALZ265-266-FLZ202-204-206-312015- /O.EXP.KMOB.SU.W.0003.000000T0000Z-210831T1200Z/ /O.CON.KMOB.CF.Y.0005.000000T0000Z-210831T1800Z/ /O.CON.KMOB.SU.Y.0012.000000T0000Z-210831T2300Z/ /O.CON.KMOB.RP.S.0024.000000T0000Z-210902T0900Z/ Mobile Coastal-Baldwin Coastal-Escambia Coastal- Santa Rosa Coastal-Okaloosa Coastal- 710 AM CDT Tue Aug 31 2021 ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON... ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 PM CDT THIS EVENING... ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH LATE WEDNESDAY NIGHT... ...HIGH SURF WARNING HAS EXPIRED... * WHAT...For the High Surf Advisory, large breaking waves of 5 to 7 feet in the surf zone. For the Coastal Flood Advisory, minor coastal flooding near 2 feet of inundation expected above normally dry ground. 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 6 PM CDT this evening. For the Coastal Flood Advisory, until 1 PM CDT this afternoon. For the High Rip Current Risk, through late Wednesday night. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. 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... 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. 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. && $$ ALZ263-264-311800- /O.CON.KMOB.CF.Y.0005.000000T0000Z-210831T1800Z/ Mobile Central-Baldwin Central- 710 AM CDT Tue Aug 31 2021 ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON... * WHAT...Minor coastal flooding near 2 to 2.5 feet of inundation expected above normally dry ground. * WHERE...Baldwin Central and Mobile Central Counties. * WHEN...Until 1 PM CDT this afternoon. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. 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. && $$
406 WHUS44 KMOB 311443 CFWMOB Coastal Hazard Message National Weather Service Mobile AL 943 AM CDT Tue Aug 31 2021 ALZ265-266-FLZ202-204-206-312245- /O.EXT.KMOB.CF.Y.0005.000000T0000Z-210901T1200Z/ /O.CON.KMOB.SU.Y.0012.000000T0000Z-210831T2300Z/ /O.CON.KMOB.RP.S.0024.000000T0000Z-210902T0900Z/ Mobile Coastal-Baldwin Coastal-Escambia Coastal- Santa Rosa Coastal-Okaloosa Coastal- 943 AM CDT Tue Aug 31 2021 ...COASTAL FLOOD ADVISORY NOW IN EFFECT UNTIL 7 AM CDT WEDNESDAY... ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 PM CDT THIS EVENING... ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH LATE WEDNESDAY NIGHT... * WHAT...For the High Surf Advisory, large breaking waves of 5 to 7 feet in the surf zone...but decreasing during the afternoon. For the Coastal Flood Advisory, minor coastal flooding near 2 feet of inundation expected above normally dry ground. 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 6 PM CDT this evening. For the Coastal Flood Advisory, until 7 AM CDT Wednesday. For the High Rip Current Risk, through late Wednesday night. * IMPACTS...Flooding of lots, parks, roads and boat ramps with only isolated road closures expected. 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... 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. 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. && $$ ALZ263-264-312245- /O.EXT.KMOB.CF.Y.0005.000000T0000Z-210901T1200Z/ Mobile Central-Baldwin Central- 943 AM CDT Tue Aug 31 2021 ...COASTAL FLOOD ADVISORY NOW IN EFFECT UNTIL 7 AM CDT WEDNESDAY... * WHAT...Minor coastal flooding near 2 to 2.5 feet of inundation expected above normally dry ground. * WHERE...Baldwin Central and Mobile Central Counties. * WHEN...Until 7 AM CDT Wednesday. * IMPACTS...Flooding of lots, parks, roads and boat ramps with only isolated road closures expected. 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. && $$
465 WHUS44 KMOB 312047 CFWMOB Coastal Hazard Message National Weather Service Mobile AL 347 PM CDT Tue Aug 31 2021 ALZ265-266-FLZ202-204-206-010500- /O.CON.KMOB.CF.Y.0005.000000T0000Z-210901T1200Z/ /O.CON.KMOB.SU.Y.0012.000000T0000Z-210831T2300Z/ /O.CON.KMOB.RP.S.0024.000000T0000Z-210902T0900Z/ Mobile Coastal-Baldwin Coastal-Escambia Coastal- Santa Rosa Coastal-Okaloosa Coastal- 347 PM CDT Tue Aug 31 2021 ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT WEDNESDAY... ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 PM CDT THIS EVENING... ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH LATE WEDNESDAY NIGHT... * WHAT...For the High Surf Advisory, large breaking waves of 5 to 7 feet in the surf zone...but decreasing during the afternoon. For the Coastal Flood Advisory, minor coastal flooding near 2 feet of inundation expected above normally dry ground. 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 6 PM CDT this evening. For the Coastal Flood Advisory, until 7 AM CDT Wednesday. For the High Rip Current Risk, through late Wednesday night. * IMPACTS...Flooding of lots, parks, roads and boat ramps with only isolated road closures expected. 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... 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. 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. && $$ ALZ263-264-010500- /O.CON.KMOB.CF.Y.0005.000000T0000Z-210901T1200Z/ Mobile Central-Baldwin Central- 347 PM CDT Tue Aug 31 2021 ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT WEDNESDAY... * WHAT...Minor coastal flooding near 2 feet of inundation expected above normally dry ground. * WHERE...Baldwin Central and Mobile Central Counties. * WHEN...Until 7 AM CDT Wednesday. * IMPACTS...Flooding of lots, parks, roads and boat ramps with only isolated road closures expected. 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. && $$
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 10:22 PM CDT | Flash Flood Warning | MOB | Mobile, Washington | 6 hr |
| Aug 30, 11:27 PM CDT | Tornado Warning | MOB | Mobile | 13 min |
| Aug 31, 1:18 AM CDT | Flash Flood Warning | MOB | Baldwin, Clarke, Mobile, Monroe, Washington | 6 hr |
| Aug 31, 3:33 AM CDT | Flash Flood Warning | MOB | Baldwin, Conecuh, Escambia, Monroe | 4 hr |
| Aug 31, 3:42 AM CDT | Special Marine Warning | MOB | 93 min | |
| Aug 31, 4:21 AM CDT | Special Marine Warning | MOB | 54 min | |
| Aug 31, 4:41 AM CDT | Special Marine Warning | MOB | 34 min | |
| Aug 31, 4:52 AM CDT | Severe Thunderstorm Warning | MOB | Covington | 23 min |
| Aug 31, 5:12 AM CDT | Special Marine Warning | MOB | 93 min | |
| Aug 31, 5:17 AM CDT | Special Marine Warning | MOB | 58 min | |
| Aug 31, 5:42 AM CDT | Special Marine Warning | MOB | 63 min | |
| Aug 31, 5:46 AM CDT | Severe Thunderstorm Warning | MOB | Butler, Crenshaw | 44 min |
| Aug 31, 6:39 AM CDT | Special Marine Warning | MOB | 96 min | |
| Aug 31, 6:42 AM CDT | Special Marine Warning | MOB | 63 min | |
| Aug 31, 6:51 AM CDT | Special Marine Warning | MOB | 36 min | |
| Aug 31, 7:09 AM CDT | Areal Flood Warning | MOB | Baldwin, Clarke, Conecuh, Escambia, Mobile, Monroe and 1 more | 6 hr |
| Aug 31, 7:45 AM CDT | Special Marine Warning | MOB | 90 min | |
| Aug 31, 8:10 AM CDT | Special Marine Warning | MOB | 65 min | |
| Aug 31, 8:28 AM CDT | Special Marine Warning | MOB | 92 min | |
| Aug 31, 9:08 AM CDT | Special Marine Warning | MOB | 97 min | |
| Aug 31, 7:14 AM CDT | Flash Flood Warning | MOB | Escambia, Okaloosa, Santa Rosa | 6 hr |
| Aug 31, 7:57 AM CDT | Severe Thunderstorm Warning | MOB | Okaloosa | 33 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.