textproduct: Key West

KEY MESSAGES

- Very warm and humid conditions will continue across the Florida Keys for the next several. - Light to gentle breezes will freshen this afternoon and evening, especially off the Upper Keys. - Rain and thunder chances will remain slim through the weekend.

- Breezy conditions are possible at the start of next week.

DISCUSSION

Issued at 1018 AM EDT Wed May 13 2026 Surface analysis places a weak area of low pressure located off west-central Florida in the Gulf, with an expansive high pressure system over the western North Atlantic. The low pressure system will intensify through the day as it pivots northeastward across the Florida Peninsula. The interaction of these two features is supporting light to gentle, albeit freshening southwesterly flow across the Florida Keys Island Chain. GOES-19 visible satellite imagery is showing a developing cumulus cloud line, including an isolated shower in the vicinity of Big Pine Key. This cloud line will likely dissipate as the breezes freshen late this afternoon. Outside of this feature, rain chances will remain near-zero for most locations. Another very warm and muggy afternoon on tap for the Keys. No changes proposed to the inherited forecast.

MARINE

Issued at 1018 AM EDT Wed May 13 2026 Small Craft Should Exercise Caution for increasing winds in the Florida Keys marine zones south and east of the Upper Keys, including eastern Hawk Channel and the eastern Straits of Florida. From synopsis, A developing area of low pressure along a frontal boundary in the eastern Gulf, a well-defined high pressure system over the north Atlantic, and daytime heating over South Florida will interact to support a wind surge over the Keys marine zones this afternoon and evening. A waning pressure pattern will support slackening breezes by late Thursday. High pressure developing over the Southeast will slide into the western North Atlantic over the weekend through early next week, supporting freshening east to southeast breezes.

AVIATION

(15Z TAFS) Issued at 1018 AM EDT Wed May 13 2026 In the mean southwesterlies, a broken cloud line will be possible across portions of the Lower and Middle Keys through the early afternoon hours. Owed to a lack of confidence in timing as well as limited spatial coverage, mention of impacts to the EYW and MTH terminals is left out of the TAFs at this time. Outside of this feature, VFR conditions will prevail through 12z Thursday morning.

KEY WATCHES/WARNINGS/ADVISORIES

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