The center of Hurricane Idalia passed about 165 nautical miles to the west of Key West on a northward path through the eastern Gulf of Mexico.  Tropical storm-force wind gusts occurred in squalls which passed mainly through portions of the Lower Florida Keys.  The maximum winds and rainfall occurred with the passage of one strong rainband which resulted in isolated fallen trees and tree limbs, isolated power outages primarily affecting a street block or two at a time. The combination of an approaching spring tide and strong southerly winds sustained just below tropical storm force resulted in storm tides ranging from 1.0 to 2.5 feet above MHHW along the oceanside.  Moderate to heavy ocean wave overwash and street flooding within a few oceanside neighborhoods on the southwest portion of Key West occurred within a few hours of high tide on the mornings of August 29th and 30th, 2023.

Tropical Storm in MONROE/MIDDLE KEYS, FLORIDA
From 29-AUG-23 15:30:00 to 29-AUG-23 16:15:00 (EST-5)
Crop damage: 0.00K
Reported by: Mesonet

The majority of wind impacts occurred with a single rain band that passed through the Middle Florida Keys during the afternoon hours of August 29, 2023.  Tropical storm-force wind gusts produced isolated power outages due to tree limbs contacting power lines mainly affect fewer than 20 customers at a time.  Peak sustained winds were measured at 33 knots at Duck Key with maximum gusts to 39 knots at the Florida Keys Marathon International Airport.

Astronomical Low Tide in MONROE/UPPER KEYS, FLORIDA
From 29-AUG-23 13:45:00 to 29-AUG-23 16:15:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Brief tropical storm force wind gusts occurred over a portion of the Upper Florida Keys during the late afternoon hours of August 29, 2023.  No wind impacts were noted.  The maximum sustained winds were measured at 22 knots with gusts to 38 knots at an electrical substation in Tavernier, FL.

Storm Surge/Tide in MONROE/LOWER KEYS, FLORIDA
From 29-AUG-23 08:00:00 to 29-AUG-23 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The center of Hurricane Idalia passed about 165 nautical miles to the west of Key West on a northward path through the eastern Gulf of Mexico.  The combination of an approaching spring tide and strong southerly winds sustained just below tropical storm force resulted in storm tides ranging from 1.0 to 2.5 feet above MHHW along the oceanside of the extreme western Lower Florida Keys.  Moderate to heavy ocean wave overwash and street flooding within a few oceanside neighborhoods on the southwest portion of Key West occurred within a few hours of high tide on the mornings of August 29th and 30th, 2023.  The maximum water level was measured at 1.47 feet MHHW around 8:36 AM EST at the NOAA NOS tide gauge in Key West harbor.

Tropical Storm in MONROE/LOWER KEYS, FLORIDA
From 29-AUG-23 08:15:00 to 29-AUG-23 12:00:00 (EST-5)
Property damage: 35.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Tropical Storm-force wind impacts occurred mainly with a single rain band that passed through the Lower Florida Keys during the late morning and early afternoon hours of August 29, 2023.  Tropical storm-force wind gusts produced isolated power outages in the Lower Keys generally affecting nearly 100 customers due to downed tree limbs and downed power lines.   A couple large royal poinciana trees were felled in Key West, with one damaging a vehicle.   Maximum sustained winds of 44 knots with a gust to 55 knots was measured at an electrical substation on Big Coppitt Key, with sustained winds of 39 knots with gusts to 51 knots measured by the ASOS at the Naval Air Station Key West Boca Chica Airfield.