Alert archive / Florida / High Surf Advisories in 2021
High Surf Advisory 11, NWS Mobile, AL
NWS Mobile, AL issued this high surf advisory at Aug 16, 2021, 3:56 PM CDT for Escambia County, Okaloosa County, Santa Rosa County, Florida. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Aug 16, 2021, 3:56 PM CDT (20:56 UTC)
- Expired
- Aug 16, 2021, 9:57 PM CDT
- In force
- 6 hr
- Issued by
- NWS Mobile, AL
Counties Escambia County, FL, Okaloosa County, FL, Santa Rosa County, FL
The radar
The Eglin Afb radar (KEVX), 102 km from the middle of the area, began a volume at 20:58 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
Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 8.9 hours before the alert went out and 259 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
- 368 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 754 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 30 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
068 WHUS44 KMOB 162056 CFWMOB Coastal Hazard Message National Weather Service Mobile AL 356 PM CDT Mon Aug 16 2021 FLZ202-204-206-170500- /O.CAN.KMOB.SU.W.0002.000000T0000Z-210817T1100Z/ /O.NEW.KMOB.SU.Y.0011.210816T2056Z-210817T1100Z/ /O.CON.KMOB.CF.Y.0004.000000T0000Z-210817T1800Z/ /O.CON.KMOB.RP.S.0021.000000T0000Z-210818T1100Z/ Escambia Coastal-Santa Rosa Coastal-Okaloosa Coastal- 356 PM CDT Mon Aug 16 2021 ...HIGH SURF ADVISORY IN EFFECT UNTIL 6 AM CDT TUESDAY... ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 1 PM CDT TUESDAY... ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH LATE TUESDAY NIGHT... ...HIGH SURF WARNING IS CANCELLED... * WHAT...For the Coastal Flood Advisory, minor coastal flooding. 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...Escambia Coastal, Santa Rosa Coastal and Okaloosa Coastal Counties. * WHEN...For the Coastal Flood Advisory, until 1 PM CDT Tuesday. For the High Surf Advisory, until 6 AM CDT Tuesday. For the High Rip Current Risk, through late Tuesday 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. && $$ ALZ265-266-170500- /O.CON.KMOB.SU.Y.0010.000000T0000Z-210817T1100Z/ /O.CON.KMOB.RP.S.0021.000000T0000Z-210818T1100Z/ Mobile Coastal-Baldwin Coastal- 356 PM CDT Mon Aug 16 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 AM CDT TUESDAY... ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH LATE TUESDAY NIGHT... * WHAT...For the High Surf Advisory, large breaking waves of 5 to 7 feet in the surf zone. For the High Rip Current Risk, dangerous rip currents. * WHERE...Baldwin Coastal and Mobile Coastal Counties. * WHEN...For the High Surf Advisory, until 6 AM CDT Tuesday. For the High Rip Current Risk, through late Tuesday night. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion. Rip currents can sweep even the best swimmers away from shore into deeper water. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced swimmers should remain out of the water due to dangerous surf conditions. Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. && $$
1 follow-up statement
055 WHUS44 KMOB 170257 CFWMOB Coastal Hazard Message National Weather Service Mobile AL 957 PM CDT Mon Aug 16 2021 FLZ202-204-206-171100- /O.CAN.KMOB.CF.Y.0004.000000T0000Z-210817T1800Z/ /O.CAN.KMOB.SU.Y.0011.000000T0000Z-210817T1100Z/ /O.CON.KMOB.RP.S.0021.000000T0000Z-210818T1100Z/ Escambia Coastal-Santa Rosa Coastal-Okaloosa Coastal- 957 PM CDT Mon Aug 16 2021 ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH LATE TUESDAY NIGHT... ...COASTAL FLOOD ADVISORY IS CANCELLED... ...HIGH SURF ADVISORY IS CANCELLED... * WHAT...Dangerous rip currents. * WHERE...Santa Rosa Coastal, Okaloosa Coastal and Escambia Coastal Counties. * WHEN...Through late Tuesday night. * 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. && $$ ALZ265-266-171100- /O.CAN.KMOB.SU.Y.0010.000000T0000Z-210817T1100Z/ /O.CON.KMOB.RP.S.0021.000000T0000Z-210818T1100Z/ Mobile Coastal-Baldwin Coastal- 957 PM CDT Mon Aug 16 2021 ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH LATE TUESDAY NIGHT... ...HIGH SURF ADVISORY IS CANCELLED... * WHAT...Dangerous rip currents. * WHERE...Baldwin Coastal and Mobile Coastal Counties. * WHEN...Through late Tuesday night. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water. PRECAUTIONARY/PREPAREDNESS ACTIONS... Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. && $$
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 10:17 PM CDT | Wind Advisory | MOB | Escambia, Santa Rosa | 18 hr |
| Aug 16, 7:38 AM CDT | River Flood Warning | MOB | Okaloosa | 13 hr |
| Aug 16, 3:57 PM CDT | Wind Advisory | MOB | Okaloosa | 6 hr |
Nearby
High Surf Advisories in Florida, 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.