Area Forecast Discussion
Issued by NWS Key West, FL
Issued by NWS Key West, FL
118 FXUS62 KKEY 171445 AFDKEY Area Forecast Discussion National Weather Service Key West FL 1045 AM EDT Fri May 17 2024 ...New DISCUSSION, MARINE, AVIATION... .DISCUSSION... Issued at 1033 AM EDT Fri May 17 2024 The heat is on. Surface observation trends indicate current temperatures and dewpoints are a degree or two higher than yesterday at this time. Peak heat indices reached 108 to 110 yesterday in a couple of spots, which scraped into the Heat Advisory category. So, Heat Advisory is in effect for all the Florida Keys as high temperatures climb into the lower to mid 90s (dewpoints near 80). Unfortunately, skies are sunny. The WBGT products (temp, humidity, wind, sky cover) suggest an Extreme Risk for dangerous heat through the afternoon so hydrate, take frequent breaks, seek the shade regularly, and consider AC breaks. The forecast is on track and calls for nil rain chances through the afternoon. Relief is in sight. We highlight good rain chances Sunday night through Tuesday followed by a slightly drier air mass and lower dewpoints. && .MARINE... Issued at 1033 AM EDT Fri May 17 2024 A weak frontal boundary to the north of the Florida Keys interacting with an area of high pressure in the western North Atlantic will result in a chaotic wind forecast through the weekend. Breezes will tend to peak in the evening and overnight hours, and then lull in the afternoon hours. && .AVIATION... (15Z TAFS) Issued at 1033 AM EDT Fri May 17 2024 VFR conditions are expected through the afternoon and evening hours. GOES 16 Visible imagery shows an area of fair weather cumulus moving from southwest to northeast along the Island Chain which may bring a brief period of MVFR CIGs to MTH within the next hour or two. Surface winds are forecast to range from 6 to 11 knots, with a prevailing direction of southeast to south through this evening, becoming more southeasterly overnight. && .CLIMATE... On this day in 2012, the daily record rainfall was recorded at both Key West (2.66") and Marathon (1.49"). Rainfall records date back to 1871 in Key West and 1950 in Marathon. && .PRELIMINARY POINT TEMPS/POPS... Key West 93 82 92 82 / 0 0 10 10 Marathon 92 83 91 83 / 0 0 10 10 && .KEY WATCHES/WARNINGS/ADVISORIES... FL...Heat Advisory until 6 PM EDT this evening for FLZ076>078. GM...None. && $$ Public/Marine/Fire...CLR Aviation/Nowcasts....MJV Data Acquisition.....MJV Climate..............NB Visit us on the web at weather.gov/key Follow us on Facebook and Twitter at: www.facebook.com/nwskeywest www.twitter.com/nwskeywest