Alert archive / Florida / Special Marine Warnings in 2021

Special Marine Warning 430, NWS Tallahassee, FL

October 28, 2021

NWS Tallahassee, FL issued this special marine warning at Oct 28, 2021, 2:52 AM EDT. It was in force for 113 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 28, 2021, 2:52 AM EDT (06:52 UTC)
Expired: Oct 28, 2021, 4:45 AM EDT
In force: 113 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Hail: 0.0 in
Wind: 49.0 mph

The radar

The Eglin Afb radar (KEVX), 52 km from the middle of the area, began a volume at 06:56 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, 6.9 hours before the alert went out and 138 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2227 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

919 
WHUS52 KTAE 280652
SMWTAE
GMZ750-770-280845-
/O.NEW.KTAE.MA.W.0430.211028T0652Z-211028T0845Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Tallahassee FL
152 AM CDT Thu Oct 28 2021

The National Weather Service in Tallahassee has issued a

* Special Marine Warning for...
  Coastal waters from Okaloosa-Walton County Line to Mexico Beach out
  20 NM...
  Waters from Okaloosa-Walton County Line to Mexico Beach from 20 to
  60 NM...

* Until 345 AM CDT.

* At 152 AM CDT, severe thunderstorms capable of producing
  waterspouts were located along a line extending from Okaloosa Pier
  to 16 nm south of Okaloosa Deep Water Reef, moving northeast at 45
  knots.

  HAZARD...Waterspouts and wind gusts to nearly 50 knots.

  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.

* Locations impacted include...
  Panama City Beach, Laguna Beach, Santa Rosa Beach, Sandestin and
  Miramar Beach.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 500 AM CDT for the Panhandle
of Florida...and the adjacent coastal waters.

Thunderstorms can produce sudden waterspouts. Waterspouts can easily
overturn boats and create locally hazardous seas. Seek safe harbor
immediately.

&&

A Tornado Watch remains in effect until 500 AM CDT for the Panhandle
of Florida...and the adjacent coastal waters.

LAT...LON 3038 8556 3032 8547 3023 8551 3019 8560
      3018 8546 3016 8542 2954 8565 2958 8640
      3038 8640
TIME...MOT...LOC 0652Z 221DEG 43KT 3036 8659 2972 8661 

WATERSPOUT...POSSIBLE
HAIL...0.00IN
WIND...49KTS

$$

42-DVD

The office that day

Everything else NWS Tallahassee, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 27, 11:23 PM EDT	Special Marine Warning	TAE		2 hr
Oct 28, 12:21 AM EDT	Special Marine Warning	TAE		3 hr
Oct 28, 1:06 AM EDT	Special Marine Warning	TAE		114 min
Oct 28, 2:06 AM EDT	Tornado Warning	TAE	Bay	24 min
Oct 28, 2:40 AM EDT	Flash Flood Warning	TAE	Bay, Walton, Washington	3 hr
Oct 28, 3:08 AM EDT	Special Marine Warning	TAE		2 hr
Oct 28, 4:23 AM EDT	Flash Flood Warning	TAE	Bay, Calhoun, Jackson, Washington	3 hr
Oct 28, 4:37 AM EDT	Special Marine Warning	TAE		3 hr
Oct 28, 5:06 AM EDT	Special Marine Warning	TAE		114 min
Oct 28, 6:53 AM EDT	Special Marine Warning	TAE		3 hr
Oct 28, 7:42 AM EDT	Special Weather Statement	TAE	Leon	33 min
Oct 28, 7:53 AM EDT	Tornado Warning	TAE	Dixie	26 min
Oct 28, 9:52 AM EDT	Special Marine Warning	TAE		53 min

Nearby

Special Marine Warnings in Florida, 2021 Every 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.