Alert archive / Florida / Extreme Wind Warnings in 2017
Extreme Wind Warning 1, NWS Key West, FL
NWS Key West, FL issued this extreme wind warning at Sep 10, 2017, 6:20 AM EDT for Monroe County, Florida. It was in force for 3 hr. 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 10, 2017, 6:20 AM EDT (10:20 UTC)
- Expired
- Sep 10, 2017, 9:15 AM EDT
- In force
- 3 hr
- Issued by
- NWS Key West, FL
- Area
- Storm-based polygon
County Monroe County, FL
The radar
The Key West radar (KBYX), 24 km from the middle of the area, began a volume at 10:20 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
Key West, FL (KEYW), launched 00:00Z, 10.3 hours before the alert went out and 27 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1148 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -28 m²/s²
- 0-3 km storm-relative helicity
- 74 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
779
WFUS52 KKEY 101020
EWWKEY
FLC087-101315-
/O.NEW.KKEY.EW.W.0001.170910T1020Z-170910T1315Z/
BULLETIN - EAS ACTIVATION REQUESTED
Extreme Wind Warning
National Weather Service Key West FL
620 AM EDT SUN SEP 10 2017
The National Weather Service in Key West has issued a
* Extreme Wind Warning for...
Lower Keys in Monroe County in Florida...
* Until 915 AM EDT
* At 617 AM EDT, National Weather Service Doppler radar indicated
extreme winds, associated with the eyewall of Hurricane Irma, were
moving into the Lower Keys.
This is an extremely dangerous and life-threatening situation!
* Locations impacted include...
Key West, Bahia Honda Channel Bridge, Big Coppitt Key, Boca Chica
Channel Bridge, Niles Channel Bridge, Spanish Harbor Channel
Bridge, Boca Chica, West End Of Seven Mile Bridge, Saddlebunch Keys
and Sunset Key.
This includes US 1 between mile markers 0 and 40.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Treat these imminent extreme winds as if a tornado was approaching
and move immediately to the safe room in your shelter. Take action
now to protect your life! YOU SHOULD ALREADY BE TAKING COVER!
&&
A tornado watch remains in effect until noon EDT for Florida.
LAT...LON 2453 8184 2464 8181 2472 8167 2470 8162
2476 8160 2478 8154 2481 8150 2480 8138
2479 8135 2480 8129 2474 8126 2470 8127
2471 8124 2468 8121 2461 8135 2460 8141
2461 8143 2460 8144 2459 8154 2455 8163
TIME...MOT...LOC 1017Z 180DEG 0KT 2467 8157
$$
CLR1 follow-up statement
681
WWUS52 KKEY 101208
SVSKEY
Severe Weather Statement
National Weather Service Key West FL
808 AM EDT SUN SEP 10 2017
FLC087-101315-
/O.CON.KKEY.EW.W.0001.000000T0000Z-170910T1315Z/
Lower Keys in Monroe FL-
808 AM EDT SUN SEP 10 2017
...AN EXTREME WIND WARNING REMAINS IN EFFECT UNTIL 915 AM EDT FOR
LOWER KEYS IN MONROE COUNTY...
At 800 AM EDT, National Weather Service Doppler radar indicated
extreme winds, associated with the northern eyewall of Hurricane
Irma, were moving across and just north of the Lower Keys.
If you happen to be in the Lower Keys, it is very likely that
sensible weather conditions will diminish significantly...namely the
winds and rainfall. DO NOT BE FOOLED BY THIS. As Irma continues to
move northward, winds over the next hour will shift from the exact
opposite direction, and will likely do so very violently and with
little to no time to react.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Treat these imminent extreme winds as if a tornado was approaching
and stay in the safe room of your shelter. Continue to use whatever
you have to protect yourself from flying debris: pillows,
mattresses, blankets, helmets, etc.
DO NOT GO OUTSIDE. Remain sheltered in place and hunkered down.
This is an extremely dangerous and life-threatening situation!
This includes US 1 between mile markers 0 and 40.
A tornado watch remains in effect until noon EDT for Florida.
LAT...LON 2453 8184 2464 8181 2472 8167 2470 8162
2476 8160 2478 8154 2481 8150 2480 8138
2479 8135 2480 8129 2474 8126 2470 8127
2471 8124 2468 8121 2461 8135 2460 8141
2461 8143 2460 8144 2459 8154 2455 8163
TIME...MOT...LOC 1156Z 180DEG 0KT 2467 8157
$$
04The office that day
Everything else NWS Key West, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 10, 9:21 AM EDT | Extreme Wind Warning | KEY | Monroe | 114 min |
| Sep 10, 11:15 AM EDT | Special Weather Statement | KEY | 90 min | |
| Sep 10, 4:06 PM EDT | Special Weather Statement | KEY | 84 min | |
| Sep 10, 6:21 PM EDT | Special Weather Statement | KEY | Miami-Dade | 54 min |
Nearby
Extreme Wind Warnings in Florida, 2017Every extreme wind warning in 2017
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.