Alert archive / Florida / High Surf Advisories in 2020
High Surf Advisory 5, NWS Tallahassee, FL
NWS Tallahassee, FL issued this high surf advisory at Aug 23, 2020, 12:46 PM CDT for 4 counties in Florida. It took effect at Aug 23, 2020, 10:00 PM CDT. It was in force for 21 hr.
The area
The counties it named.
The facts
- Issued
- Aug 23, 2020, 12:46 PM CDT (17:46 UTC)
- In effect from
- Aug 23, 2020, 10:00 PM CDT
- Expired
- Aug 24, 2020, 7:00 PM CDT
- In force
- 21 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 17:48 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, 5.8 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
- 285 J/kg
- Mixed-layer CIN
- -84 J/kg
- Mixed-layer LCL
- 909 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 9 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this high surf advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Tallahassee, FL wrote its last area forecast discussion before this high surf advisory went out at Aug 23, 9:39 AM CDT, 3 hours 7 minutes earlier.
Area forecast discussion, Aug 23, 9:39 AM CDT, 3 hours 7 minutes before
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</html>The office that day
Everything else NWS Tallahassee, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 9:22 AM CDT | Special Marine Warning | TAE | 38 min | |
| Aug 23, 11:42 AM CDT | Special Marine Warning | TAE | 48 min | |
| Aug 23, 12:43 PM CDT | Small Craft Advisory | TAE | 3 days | |
| Aug 23, 12:45 PM CDT | Areal Flood Advisory | TAE | Franklin | 59 min |
| Aug 23, 1:44 PM CDT | Flash Flood Warning | TAE | Franklin | 2 hr |
| Aug 23, 4:28 PM CDT | Special Marine Warning | TAE | 47 min | |
| Aug 23, 5:12 PM CDT | Special Marine Warning | TAE | 63 min | |
| Aug 23, 6:09 PM CDT | Special Marine Warning | TAE | 36 min | |
| Aug 23, 6:26 PM CDT | Special Weather Statement | TAE | Jefferson, Lafayette, Taylor | 49 min |
| Aug 23, 6:39 PM CDT | Special Marine Warning | TAE | 96 min |
Nearby
High Surf Advisories in Florida, 2020Every high surf advisory in 2020
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.