Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Critical to extremely critical fire weather conditions are forecast from the Northwest and the northern Great Basin this weekend. Particularly Dangerous Situation Red Flag Warnings have been issued. Read More >

Hazardous Weather Conditions

Heat Advisory until August 3, 09:00 PM MDT

Current conditions at

St. Johns, St. Johns Industrial Airpark (KSJN)

Lat: 34.51833°NLon: 109.37917°WElev: 5732.0ft.

Clear

82°F

28°C

Humidity	30%
Wind Speed	SW 4 MPH
Barometer	30.18 in (1022.01 mb)
Dewpoint	48°F (9°C)
Visibility	10.00 mi
Heat Index	80°F (27°C)
Last update	01 Aug 11:35 PM MST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

St. Johns AZ

Heat Advisory August 2, 12:50am until August 3, 09:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory August 2, 12:50am until August 3, 09:00pm
NOW until 9:00pm Mon
Heat Advisory
Overnight
Low: 69 °F
Partly Cloudy
Sunday
High: 100 °F
Hot
Sunday Night
Low: 71 °F
Decreasing
Clouds
Monday
High: 98 °F
Hot
Monday Night
Low: 70 °F
Mostly Clear
Tuesday
High: 98 °F
Hot
Tuesday Night
Low: 68 °F
Slight Chance
T-storms then
Partly Cloudy
Wednesday
High: 96 °F
Sunny then
Slight Chance
T-storms

Detailed Forecast

Overnight

Partly cloudy, with a low around 69. South wind around 8 mph.

Sunday

Sunny and hot, with a high near 100. South wind 7 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph.

Sunday Night

Mostly cloudy, then gradually becoming mostly clear, with a low around 71. Northwest wind 8 to 17 mph becoming south after midnight. Winds could gust as high as 26 mph.

Monday

Sunny and hot, with a high near 98. Southwest wind 6 to 14 mph becoming northwest in the morning. Winds could gust as high as 24 mph.

Monday Night

Mostly clear, with a low around 70. West wind 6 to 16 mph becoming southwest after midnight. Winds could gust as high as 25 mph.

Tuesday

Sunny and hot, with a high near 98. Southwest wind 5 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.

Tuesday Night

A 10 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 68. West wind 12 to 17 mph becoming south 6 to 11 mph after midnight. Winds could gust as high as 28 mph.

Wednesday

A 10 percent chance of showers and thunderstorms after noon. Mostly sunny and hot, with a high near 96. Light and variable wind becoming west 8 to 13 mph in the morning. Winds could gust as high as 23 mph.

Wednesday Night

A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 66. West wind 6 to 15 mph becoming south after midnight. Winds could gust as high as 25 mph.

Thursday

A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 95. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 17 mph.

Thursday Night

A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. South wind 5 to 11 mph, with gusts as high as 18 mph.

Friday

A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 95. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

Friday Night

A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 64. West wind 5 to 11 mph becoming south after midnight. Winds could gust as high as 20 mph.

Saturday

A 10 percent chance of showers and thunderstorms. Sunny, with a high near 95. Light and variable wind becoming northwest 5 to 10 mph in the afternoon. Winds could gust as high as 18 mph.