* WHAT...Heat index values 105 to 110 expected.
* WHERE...All of South Florida.
* WHEN...From noon today to 7 PM EDT this evening.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
Heat Advisory
Until 2026-08-12T19:00:00-04:00
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National Weather Service
* WHAT...Heat index values 105 to 110 expected.
* WHERE...All of South Florida.
* WHEN...From noon today to 7 PM EDT this evening.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
THREE MILE CANAL BELOW G409 NEAR CLEWISTON
Realtime Data
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Report
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Conditions
2
Discharge (cfs)
12.2
Gauge Height (ft)
Streamflow discharge was last observed at 2 cfs, and a gauge height of 12.19 feet.
With the
% decrease since yesterday,
the streamflow average over the past 10 days is 4 .
Weather today, Tomorrow,
The canal receives flow from Lake Okeechobee and contributes to the Caloosahatchee River. There are no major tributaries or dams associated with the canal. The flow in the canal is influenced by seasonal rainfall patterns and water management practices. During the wet season, the canal experiences high flows, and during the dry season, flows decrease. An interesting fact about the canal is that it was constructed in the early 1900s to drain the Everglades for agricultural purposes, but it now also serves as an important conveyance for water supply and flood control.
August 12, 2026
Elevation
15.0 ft
Last Updated
Mean water velocity for discharge computation, feet per second
0.0 ft/sec
Gage height, ft
12.19 ft
Stream water level elevation above NGVD 1929, in ft