textproduct: Key West

KEY MESSAGES

- Very warm and humid conditions over the next few days will lead to a generally moderate risk of heat illness with periods of high risk conditions. - Rain and thunder chances will remain on a plateau through tomorrow, and gradually decline thereafter.

- A period of on and off breezy conditions over the next few days will help to mitigate some of the discomfort from warm overnight temperatures.

AVIATION

(18Z TAFS) Issued at 302 PM EDT Mon May 18 2026 VFR conditions will prevail at both island terminals, but occasional observations of MVFR CIGs are possible as pockets of showers continue to move through the area. Due to low confidence related to location and timing of impactful showers, opting to carry VCSH in the TAF package. Amendments will be made if necessary. East surface winds near 15 knots will prevail.

PREV DISCUSSION

Issued at 440 AM EDT Mon May 18 2026

Additional moisture to our east should pivot in throughout the rest of today. This combined with an already accelerated flow, should help to smash any mesoscale boundaries out there, allowing for showers to increase in coverage again. This enhanced moisture pool will linger through tonight and gradually begin scouring out starting Tuesday. This will not be a fast process and rain chances will be slow to diminish through the week. Meanwhile, a high pressure near Bermuda will flatten over the next several days, weakening the pressure gradient through the end of the week. This will lead to generally a slackening of winds, though there will still be some peaks in the evenings at times.

By the end of the week we may have an easterly undulation move through the Bahamas and along the east coast of Florida, injecting more moisture back across the area, and subsequently rain chances. It's too far out to get our hopes up at this time.

MARINE

Issued at 1130 AM EDT Mon May 18 2026 Surface high pressure centered near Bermuda will continue to promote moderate to fresh east to southeast breezes through the next couple of days. Highest breezes will prevail through Tuesday evening. Breezes then undergo a very slow slackening process with peaks expected during the evenings and lulls during the day. Rain and thunder chances will remain above normal through much of the week.

PRELIMINARY POINT TEMPS/POPS

Key West 80 91 80 90 / 40 40 30 20 Marathon 79 86 80 86 / 40 40 30 20

KEY WATCHES/WARNINGS/ADVISORIES

FL...None. GM...None.