Alert archive / Florida / High Surf Advisories in 2021
High Surf Advisory 5, NWS Tallahassee, FL
NWS Tallahassee, FL issued this high surf advisory at Aug 17, 2021, 2:32 AM CDT for 4 counties in Florida. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Aug 17, 2021, 2:32 AM CDT (07:32 UTC)
- Expired
- Aug 17, 2021, 8:00 AM CDT
- In force
- 5 hr
- Issued by
- NWS Tallahassee, FL
Counties Bay County, FL, Franklin County, FL, Gulf County, FL, Walton County, FL
The radar
The Eglin Afb radar (KEVX), 64 km from the middle of the area, began a volume at 07:35 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 00:00Z, 7.5 hours before the alert went out and 116 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
- 624 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 597 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 457 m²/s²
- 0-3 km storm-relative helicity
- 592 m²/s²
- Significant tornado parameter
- 1.4
- Supercell composite
- 11.1
The text
As transmitted.
010 WHUS42 KTAE 170732 CFWTAE Coastal Hazard Message National Weather Service Tallahassee FL 332 AM EDT Tue Aug 17 2021 FLZ108-112-114-180000- /O.CAN.KTAE.SU.W.0001.000000T0000Z-210818T0000Z/ /O.NEW.KTAE.SU.Y.0005.210817T0732Z-210817T1300Z/ /O.CAN.KTAE.CF.Y.0001.000000T0000Z-210817T1800Z/ /O.CON.KTAE.RP.S.0075.000000T0000Z-210819T0000Z/ South Walton-Coastal Bay-Coastal Gulf- 332 AM EDT Tue Aug 17 2021 /232 AM CDT Tue Aug 17 2021/ ...HIGH SURF ADVISORY IN EFFECT UNTIL 9 AM EDT /8 AM CDT/ THIS MORNING... ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH WEDNESDAY EVENING... ...HIGH SURF WARNING IS CANCELLED... ...COASTAL FLOOD ADVISORY IS CANCELLED... * WHAT...For the High Surf Advisory, large breaking waves of 3 to 7 feet in the surf zone. For the High Rip Current Risk, dangerous rip currents. * WHERE...Walton, Bay, and Gulf County Beaches. * WHEN...For the High Surf Advisory, until 9 AM EDT /8 AM CDT/ this morning. For the High Rip Current Risk, through Wednesday 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. && $$ FLZ115-180000- /O.CAN.KTAE.SU.W.0001.000000T0000Z-210818T0000Z/ /O.NEW.KTAE.SU.Y.0005.210817T0732Z-210817T1300Z/ /O.CON.KTAE.RP.S.0075.000000T0000Z-210819T0000Z/ Coastal Franklin- 332 AM EDT Tue Aug 17 2021 ...HIGH SURF ADVISORY IN EFFECT UNTIL 9 AM EDT THIS MORNING... ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH WEDNESDAY EVENING... ...HIGH SURF WARNING IS CANCELLED... * WHAT...For the High Surf Advisory, large breaking waves of 4 to 9 feet in the surf zone. For the High Rip Current Risk, dangerous rip currents. * WHERE...Franklin County Beaches. * WHEN...For the High Surf Advisory, until 9 AM EDT this morning. For the High Rip Current Risk, through Wednesday evening. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion. Rip currents can sweep even the best swimmers away from shore into deeper water. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced swimmers should remain out of the water due to dangerous surf conditions. Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. && $$
The office that day
Everything else NWS Tallahassee, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 7:54 PM CDT | Areal Flood Advisory | TAE | Madison, Taylor | 3 hr |
| Aug 16, 8:13 PM CDT | Areal Flood Warning | TAE | Bay, Calhoun, Gulf, Holmes, Jackson, Washington | 12 hr |
| Aug 16, 10:02 PM CDT | Small Craft Advisory | TAE | 15 hr | |
| Aug 16, 10:17 PM CDT | River Flood Warning | TAE | Jackson | 11 hr |
| Aug 17, 12:02 PM CDT | River Flood Warning | TAE | Dixie, Gilchrist, Levy | 44 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.