Alert archive / Florida / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 1, NWS Key West, FL
NWS Key West, FL issued this severe thunderstorm warning at Jan 23, 2017, 2:24 AM EST for Monroe County, Florida. It was in force for 66 min. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jan 23, 2017, 2:24 AM EST (07:24 UTC)
- Expired
- Jan 23, 2017, 3:30 AM EST
- In force
- 66 min
- Issued by
- NWS Key West, FL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Monroe County, FL
The radar
The Key West radar (KBYX), 16 km from the middle of the area, began a volume at 07:27 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jan 23, 2:39 AM EST | MARINE TSTM WIND 43 | Boca Chica, FL | 37 KNOT GUST MEASURED AT BOCA CHICA NAS. |
| Jan 23, 3:06 AM EST | MARINE TSTM WIND 40 | Key West, FL | 35 KNOT GUST MEASURED AT WFO KEY WEST. |
| Jan 23, 3:33 AM EST | MARINE TSTM WIND 50 | Cudjoe Key, FL | 43 KNOT GUST AT CUDJOE KEY CWOP OBSERVATION. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 22, 9:57 PM EST | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Key West, FL (KEYW), launched 00:00Z, 7.4 hours before the alert went out and 16 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
- 1064 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 906 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 200 m²/s²
- 0-3 km storm-relative helicity
- 279 m²/s²
- Significant tornado parameter
- 1.3
- Supercell composite
- 6.2
The text
As transmitted.
305
WUUS52 KKEY 230724
SVRKEY
FLC087-230830-
/O.NEW.KKEY.SV.W.0001.170123T0724Z-170123T0830Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Key West FL
224 AM EST MON JAN 23 2017
The National Weather Service in Key West has issued a
* Severe Thunderstorm Warning for...
Lower Keys in Monroe County in Florida...
* Until 330 AM EST
* At 223 AM EST...Severe thunderstorms were located along a line
extending from 24 miles northwest of Big Torch Key to the
Marquesas Keys, moving to the east-southeast at around 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Key West, Boca Chica, Marquesas Keys, Big Coppitt Key, Boca Chica
Channel Bridge, Saddlebunch Keys, Geiger Key, Boca Grande Key,
Sunset Key and Shark Key.
This includes US 1 between mile markers 0 and 24.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 2452 8203 2457 8208 2455 8209 2452 8216
2456 8220 2462 8213 2455 8204 2456 8197
2459 8198 2463 8194 2458 8184 2467 8179
2473 8168 2470 8162 2478 8159 2483 8148
2479 8133 2458 8154 2453 8171
TIME...MOT...LOC 0723Z 281DEG 24KT 2500 8170 2460 8212 2402 8267
HAIL...<.75IN
WIND...60MPH
$$
BS1 follow-up statement
416
WWUS52 KKEY 230752
SVSKEY
Severe Weather Statement
National Weather Service Key West FL
252 AM EST MON JAN 23 2017
FLC087-230830-
/O.CON.KKEY.SV.W.0001.000000T0000Z-170123T0830Z/
Lower Keys in Monroe FL-
252 AM EST MON JAN 23 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 AM EST
FOR LOWER KEYS IN MONROE COUNTY...
At 250 AM EST...a line of severe thunderstorms extended from 16
miles north of Big Torch Key to near Boca Grande Key to 30 miles
southwest of Marquesas Keys, moving to the east-southeast at around
35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Key West, Boca Chica, Marquesas Keys, Big Coppitt Key, Boca Chica
Channel Bridge, Saddlebunch Keys, Geiger Key, Boca Grande Key, Sunset
Key and Shark Key.
This includes US 1 between mile markers 0 and 24.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection, move to an interior room on the lowest floor of
a building.
&&
LAT...LON 2452 8203 2457 8208 2455 8209 2452 8216
2456 8220 2462 8213 2455 8204 2456 8197
2459 8198 2463 8194 2458 8184 2467 8179
2473 8168 2470 8162 2478 8159 2483 8148
2479 8133 2458 8154 2453 8171
TIME...MOT...LOC 0750Z 281DEG 24KT 2497 8151 2457 8193 2399 8248
HAIL...<.75IN
WIND...60MPH
$$
BSThe office that day
Everything else NWS Key West, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 22, 11:25 PM EST | Special Marine Warning | KEY | 65 min | |
| Jan 23, 12:31 AM EST | Special Marine Warning | KEY | 59 min | |
| Jan 23, 1:30 AM EST | Special Marine Warning | KEY | 60 min | |
| Jan 23, 2:30 AM EST | Special Marine Warning | KEY | 60 min | |
| Jan 23, 3:27 AM EST | Special Marine Warning | KEY | 63 min | |
| Jan 23, 3:30 AM EST | Special Weather Statement | KEY | 60 min | |
| Jan 23, 4:24 AM EST | Special Marine Warning | KEY | 66 min | |
| Jan 23, 4:30 AM EST | Special Weather Statement | KEY | 15 min | |
| Jan 23, 5:19 AM EST | Special Marine Warning | KEY | 56 min | |
| Jan 23, 6:11 AM EST | Special Marine Warning | KEY | 49 min | |
| Jan 23, 1:10 PM EST | Coastal Flood Advisory | KEY | Monroe | 21 hr |
Nearby
Severe Thunderstorm Warnings in Florida, 2017Every severe thunderstorm 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.