Alert archive / Florida / Special Marine Warnings in 2019
Special Marine Warning 310, NWS Key West, FL
NWS Key West, FL issued this special marine warning at Sep 13, 2019, 9:37 PM EDT. It was in force for 53 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
- Sep 13, 2019, 9:37 PM EDT (01:37 UTC)
- Expired
- Sep 13, 2019, 10:30 PM EDT
- In force
- 53 min
- Issued by
- NWS Key West, FL
- Area
- Storm-based polygon
- Hail
- 0.0 in
- Wind
- 34.0 mph
The radar
The Key West radar (KBYX), 138 km from the middle of the area, began a volume at 01:39 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
Key West, FL (KEYW), launched 00:00Z, 1.6 hours before the alert went out and 137 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
- 1861 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 965 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -70 m²/s²
- 0-3 km storm-relative helicity
- -45 m²/s²
- Significant tornado parameter
- -0.3
- Supercell composite
- -2.7
The text
As transmitted.
023
WHUS52 KKEY 140137
SMWKEY
GMZ034-055-075-140230-
/O.NEW.KKEY.MA.W.0310.190914T0137Z-190914T0230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Key West FL
937 PM EDT Fri Sep 13 2019
The National Weather Service in Key West has issued a
* Special Marine Warning for...
Straits of Florida from Halfmoon Shoal to 20 nm west of Dry
Tortugas out 60 nm...
Gulf of Mexico including Dry Tortugas and Rebecca Shoal Channel...
* Until 1030 PM EDT.
* At 937 PM EDT, showers and isolated thunderstorms with gusty winds
were located along a line extending from 12 nm west of W Tower to
22 nm southwest of Twenty-Eight Foot Shoal Light, moving west at
25 knots.
HAZARD...Wind gusts 34 knots or greater.
SOURCE...National Weather Service Meteorologist.
IMPACT...Expect wind gusts in excess of 34 knots, suddenly higher
waves, frequent lightning, and heavy downpours.
* Locations in the warning include...
Rebecca Shoal Light, Dry Tortugas, Pulaski Shoal Light, Tortugas
Ecological Reserve South, Dry Tortugas Light, Tortugas Ecological
Reserve North and Fort Jefferson.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare for wind gusts in excess of 34 knots, steep and fast-building
seas, frequent lightning strikes, and blinding downpours. Stay low or
go below, and make sure all on board are wearing life jackets.
&&
LAT...LON 2461 8328 2480 8323 2495 8318 2502 8313
2502 8251 2408 8248 2398 8327 2410 8329
TIME...MOT...LOC 0137Z 081DEG 26KT 2499 8294 2409 8259
HAIL...0.00IN
WIND...>34KTS
$$
JacobsonThe office that day
Everything else NWS Key West, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 13, 8:00 PM EDT | Special Marine Warning | KEY | 45 min | |
| Sep 13, 8:04 PM EDT | Special Marine Warning | KEY | 56 min | |
| Sep 13, 8:40 PM EDT | Special Marine Warning | KEY | 27 min | |
| Sep 13, 8:45 PM EDT | Special Marine Warning | KEY | 60 min | |
| Sep 13, 10:23 PM EDT | Special Marine Warning | KEY | 67 min | |
| Sep 14, 5:05 AM EDT | Special Marine Warning | KEY | 55 min | |
| Sep 14, 6:14 AM EDT | Special Marine Warning | KEY | 61 min | |
| Sep 14, 6:48 AM EDT | Special Marine Warning | KEY | 46 min | |
| Sep 14, 7:09 AM EDT | Special Marine Warning | KEY | 33 min |
Nearby
Special Marine Warnings in Florida, 2019Every special marine warning in 2019
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.