Alert archive / Florida / High Surf Advisories in 2021
High Surf Advisory 8, NWS Mobile, AL
NWS Mobile, AL issued this high surf advisory at Jun 20, 2021, 4:51 AM CDT for Escambia County, Okaloosa County, Santa Rosa County, Florida; Baldwin County, Mobile County, Alabama. It was in force for 14 hr.
The area
The counties it named.
The facts
- Issued
- Jun 20, 2021, 4:51 AM CDT (09:51 UTC)
- Expired
- Jun 20, 2021, 7:00 PM CDT
- In force
- 14 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 09:51 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, 9.9 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
- 694 J/kg
- Mixed-layer CIN
- -40 J/kg
- Mixed-layer LCL
- 1203 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- 81 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.5
The text
As transmitted.
006 WHUS44 KMOB 200951 CFWMOB Coastal Hazard Message National Weather Service Mobile AL 451 AM CDT Sun Jun 20 2021 ALZ265-266-FLZ202-204-206-201800- /O.CAN.KMOB.SU.W.0001.000000T0000Z-210621T1100Z/ /O.NEW.KMOB.SU.Y.0008.210620T0951Z-210621T0000Z/ /O.CON.KMOB.RP.S.0016.000000T0000Z-210623T0000Z/ Mobile Coastal-Baldwin Coastal-Escambia Coastal- Santa Rosa Coastal-Okaloosa Coastal- 451 AM CDT Sun Jun 20 2021 ...HIGH SURF ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING... ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH TUESDAY EVENING... ...HIGH SURF WARNING IS CANCELLED... * WHAT...For the High Surf Advisory, large breaking waves of 5 to 7 feet 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, until 7 PM CDT this evening. For the High Rip Current Risk, through Tuesday evening. * 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. && $$
2 follow-up statements
184 WHUS44 KMOB 201724 CFWMOB Coastal Hazard Message National Weather Service Mobile AL 1224 PM CDT Sun Jun 20 2021 ALZ265-266-FLZ202-204-206-210000- /O.CON.KMOB.SU.Y.0008.000000T0000Z-210621T0000Z/ /O.CON.KMOB.RP.S.0016.000000T0000Z-210623T0000Z/ Mobile Coastal-Baldwin Coastal-Escambia Coastal- Santa Rosa Coastal-Okaloosa Coastal- 1224 PM CDT Sun Jun 20 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH TUESDAY EVENING... * WHAT...For the High Surf Advisory, large breaking waves of 5 to 7 feet in the surf zone. For the High Rip Current Risk, dangerous rip currents. * WHERE...In Alabama, Mobile Coastal and Baldwin Coastal Counties. In Florida, Escambia Coastal, Santa Rosa Coastal and Okaloosa Coastal Counties. * WHEN...For the High Surf Advisory, until 7 PM CDT this evening. For the High Rip Current Risk, through Tuesday evening. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion. Rip currents can sweep even the best swimmers away from shore into deeper water. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced swimmers should remain out of the water due to dangerous surf conditions. Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. && $$
700 WHUS44 KMOB 210001 CFWMOB Coastal Hazard Message National Weather Service Mobile AL 701 PM CDT Sun Jun 20 2021 ALZ265-266-FLZ202-204-206-210815- /O.EXP.KMOB.SU.Y.0008.000000T0000Z-210621T0000Z/ /O.CON.KMOB.RP.S.0016.000000T0000Z-210623T0000Z/ Mobile Coastal-Baldwin Coastal-Escambia Coastal- Santa Rosa Coastal-Okaloosa Coastal- 701 PM CDT Sun Jun 20 2021 ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH TUESDAY EVENING... * WHAT...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 Rip Current Risk, through Tuesday evening. * 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 |
|---|---|---|---|---|
| Jun 19, 10:56 PM CDT | Special Weather Statement | MOB | Crenshaw | 49 min |
| Jun 19, 11:46 PM CDT | Special Weather Statement | MOB | Conecuh, Crenshaw, Escambia | 44 min |
| Jun 20, 12:31 AM CDT | Special Weather Statement | MOB | Conecuh, Covington, Escambia | 59 min |
| Jun 20, 1:35 AM CDT | Special Weather Statement | MOB | Covington | 40 min |
| Jun 20, 2:40 AM CDT | Special Weather Statement | MOB | Covington | 50 min |
| Jun 20, 5:02 AM CDT | Special Marine Warning | MOB | 88 min | |
| Jun 20, 6:30 AM CDT | Special Marine Warning | MOB | 90 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.