Alert archive / Florida / Special Marine Warnings in 2021
Special Marine Warning 418, NWS Tallahassee, FL
NWS Tallahassee, FL issued this special marine warning at Oct 6, 2021, 3:16 PM EDT. It was in force for 59 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Oct 6, 2021, 3:16 PM EDT (19:16 UTC)
- Expired
- Oct 6, 2021, 4:15 PM EDT
- In force
- 59 min
- Issued by
- NWS Tallahassee, FL
- Area
- Storm-based polygon
- Hail
- 0.0 in
- Wind
- 34.0 mph
The radar
The Tallahassee radar (KTLH), 104 km from the middle of the area, began a volume at 19:20 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, 7.3 hours before the alert went out and 102 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
- 385 J/kg
- Mixed-layer CIN
- -59 J/kg
- Mixed-layer LCL
- 960 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
As transmitted.
634
WHUS52 KTAE 061916
SMWTAE
GMZ730-765-062015-
/O.NEW.KTAE.MA.W.0418.211006T1916Z-211006T2015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Tallahassee FL
316 PM EDT Wed Oct 6 2021
The National Weather Service in Tallahassee has issued a
* Special Marine Warning for...
Apalachee Bay or Coastal Waters From Keaton Beach to Ochlockonee
River Fl out to 20 Nm...
Coastal waters from Suwannee River to Keaton Beach out 20 NM...
* Until 415 PM EDT.
* At 315 PM EDT, a severe thunderstorm capable of producing
waterspouts was located 15 nm southeast of Buckeye Reef, moving
north at 15 knots.
HAZARD...Waterspouts and wind gusts 34 knots or greater.
SOURCE...Radar indicated.
IMPACT...Waterspouts can quickly form and capsize boats...damage
vessels...and create suddenly higher waves. Make sure all
on board are in a secure location and wearing life
jackets. Expect wind gusts in excess of 34
knots...suddenly higher waves...frequent lightning...and
heavy downpours. Make sure all on board are wearing life
jackets.
* The severe thunderstorm will remain over mainly open waters.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to safe harbor until hazardous weather passes.
Thunderstorms can produce sudden waterspouts. Waterspouts can easily
overturn boats and create locally hazardous seas. Seek safe harbor
immediately.
&&
LAT...LON 2946 8348 2967 8387 3003 8383 2987 8356
2985 8354 2979 8353 2969 8336
TIME...MOT...LOC 1915Z 198DEG 13KT 2954 8364
WATERSPOUT...POSSIBLE
HAIL...0.00IN
WIND...>34KTS
$$
25-CAMPWhat forecasters said that day
The local office's own words before this special marine warning 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 special marine warning went out at Oct 6, 3:07 PM EDT, 9 minutes earlier.
Area forecast discussion, Oct 6, 3:07 PM EDT, 9 minutes before
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Local storm report, Oct 6, 10:04 AM EDT, 5 hours 12 minutes before
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</html>Local storm report, Oct 6, 10:07 AM EDT, 5 hours 9 minutes before
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</html>Local storm report, Oct 6, 10:32 AM EDT, 4 hours 44 minutes before
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<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
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The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
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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 |
|---|---|---|---|---|
| Oct 6, 2:58 AM EDT | Rip Current Statement | TAE | Bay, Franklin, Gulf, Walton | 21 hr |
| Oct 6, 4:39 AM EDT | Special Marine Warning | TAE | 36 min | |
| Oct 6, 5:48 AM EDT | Special Marine Warning | TAE | 57 min | |
| Oct 6, 6:40 AM EDT | Special Marine Warning | TAE | 95 min | |
| Oct 6, 6:48 AM EDT | Special Weather Statement | TAE | Walton | 42 min |
| Oct 6, 7:24 AM EDT | Tornado Warning | TAE | Walton | 8 min |
| Oct 6, 8:32 AM EDT | Areal Flood Advisory | TAE | Wakulla | 102 min |
| Oct 6, 9:09 AM EDT | Special Marine Warning | TAE | 66 min | |
| Oct 6, 10:14 AM EDT | Flash Flood Warning | TAE | Wakulla | 2 hr |
| Oct 6, 11:35 AM EDT | River Flood Warning | TAE | Wakulla | 61 hr |
| Oct 6, 2:32 PM EDT | Special Marine Warning | TAE | 58 min | |
| Oct 6, 4:09 PM EDT | Areal Flood Advisory | TAE | Madison | 2 hr |
Nearby
Special Marine Warnings in Florida, 2021Every special marine warning 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.