FNUS75 KBOI 191843

FWSBOI



Spot Forecast for Trueblood RX...Boise BLM

National Weather Service Boise ID

1243 PM MDT Sun Apr 19 2026



Forecast is based on ignition time of 1000 MDT on April 20. 

If conditions become unrepresentative...contact the National Weather

Service.



Please contact our office at (208)334-9060, if you have questions

or concerns with this forecast.



...WARM AND DRY THROUGH TUESDAY...

...STRONG COLD FRONT ON WEDNESDAY...



.DISCUSSION...

A ridge of high pressure will continue to build into the area 

through Monday. A low pressure system will move into the area late

Tuesday with increasing winds ahead of a strong cold front on 

Wednesday morning. Southeast winds expected during the afternoons,

with light northwest during the nights up until the cold front. 

Wetting rains expected on Wednesday with northwest winds gusting 

up to 30 mph during the afternoon. 



.MONDAY...



Sky/weather.........Mostly sunny. 

Max temperature.....83 to 88. 

Min humidity........14 to 19 percent. 

CWR.................0 percent. 

Wind - 20 foot......Southeast 6 to 10 mph. Gusts up to 18 mph in 

                    the afternoon. 

Mixing height.......10000 ft AGL. 

Transport winds.....South around 15 mph. 

Ventilation Index...1500 excellent. 



.MONDAY NIGHT...



Sky/weather.........Partly cloudy. 

Min temperature.....41 to 46. 

Max humidity........59 to 64 percent. 

CWR.................0 percent. 

Wind - 20 foot......West around 6 mph in the evening shifting to 

                    the northeast around 5 mph overnight. 

Mixing height.......300 ft AGL. 

Transport winds.....Southeast around 5 mph. 

Ventilation Index...15 poor. 



.TUESDAY...



Sky/weather.........Mostly sunny. 

Max temperature.....83 to 88. 

Min humidity........18 to 23 percent. 

CWR.................0 percent. 

Wind - 20 foot......Southeast 9 to 15 mph. Gusts up to 24 mph in 

                    the afternoon. 

Mixing height.......10500 ft AGL. 

Transport winds.....South around 20 mph. 

Ventilation Index...2100 excellent. 



$$

Forecaster...Anderson

Requested by...Nathan Hersley

Type of request...PRESCRIBED

.TAG 2610626.0/BOI

.DELDT 04/20/26

.FormatterVersion 2.0.0

.EMAIL nhersley@blm.gov