Idaho Transportation Department Logo Idaho Transportation Department   Highway Info
ID 21
ID 21 in both directions: Wet pavement, rain.
Between I-84 and Robie Creek Road (8 miles north of the Boise area). The road is wet. Expect rain.
Last updated yesterday at 12:33pm MST
ID 21 in both directions: Wet pavement, cloudy, dense fog, large animals on roadway, rock fall danger.
Between Highland Valley Summit (8 miles north of the Boise area) and King Road (Idaho City). The road is wet. Cloudy skies. Be ready for dense fog. Look out for large animals on the roadway. There is danger of a rock fall.
Last updated yesterday at 9:02pm MST
ID 21 in both directions: Packed snow, packed snow patches, cloudy, patchy fog, large animals on roadway, rock fall danger.
Between King Road and Garden Valley Road (32 miles north of the Idaho City area). Look out for packed snow on the roadway. Look out for packed snow patches on the roadway. Cloudy skies. Be ready for patchy fog. Look out for large animals on the roadway. There is danger of a rock fall.
Last updated yesterday at 9:02pm MST
ID 21 in both directions: Packed snow, icy patches, rain and snow mixed, large animals on roadway, rock fall danger.
Between Garden Valley Road (32 miles north of the Idaho City area) and The Custer - Boise County Line (22 miles south of the Stanley area). Look out for packed snow on the roadway. Look out for icy patches. Look out for a mix of rain and snow. Look out for large animals on the roadway. There is danger of a rock fall.
Last updated yesterday at 8:59pm MST
ID 21: Winter Storm Warning.
Between Grandjean Road (24 miles south of the Stanley area) and ID 75 (Stanley). A Winter Storm Warning is in effect. Until Monday, at about 5:00AM MST.

Comment: Winter Storm Warning issued December 20 at 2:58AM MST until December 22 at 5:00AM MST by NWS

.ABUNDANT PACIFIC MOISTURE WILL MOVE INTO SOUTHEAST IDAHO TODAY AND HEAVY SNOW IS EXPECTED AT HIGH ELEVATIONS IN THE CENTRAL MOUNTAINS AND EASTERN HIGHLANDS. HIGHEST SNOW AMOUNTS ARE EXPECTED TO BE ABOVE 7000 FEET AS THIS WILL BE A WARM SYSTEM. 2 TO 6 INCHES ARE EXPECTED AT 5 TO 6 THOUSAND FEET WITH OVER 6 INCHES POSSIBLE ABOVE 6 THOUSAND FEET AND OVER A FOOT MAY FALL ABOVE 7000

Full NWS alert
Last updated today at 2:59am MST
ID 21 in both directions: Snow on roadway, snow.
Between The Custer - Boise County Line (22 miles south of the Stanley area) and ID 75 (Stanley). Look out for snow on the roadway. Be prepared for snow.
Last updated yesterday at 3:50pm MST
Switch to Road Reports
Switch to Truck Restrictions
Reports on ID 21
Map of Reports on ID 21 Between I-84 and Robie Creek Road (8 miles north of the Boise area). The road is wet. Expect rain. Between Highland Valley Summit (8 miles north of the Boise area) and King Road (Idaho City). The road is wet. Cloudy skies. Be ready for dense fog. Look out for large animals on the roadway. There is danger of a rock fall. Between King Road and Garden Valley Road (32 miles north of the Idaho City area). Look out for packed snow on the roadway. Look out for packed snow patches on the roadway. Cloudy skies. Be ready for patchy fog. Look out for large animals on the roadway. There is danger of a rock fall. Between Garden Valley Road (32 miles north of the Idaho City area) and The Custer - Boise County Line (22 miles south of the Stanley area). Look out for packed snow on the roadway. Look out for icy patches. Look out for a mix of rain and snow. Look out for large animals on the roadway. There is danger of a rock fall. Between The Custer - Boise County Line (22 miles south of the Stanley area) and ID 75 (Stanley). Look out for snow on the roadway. Be prepared for snow. Between Grandjean Road (24 miles south of the Stanley area) and ID 75 (Stanley). A Winter Storm Warning is in effect. Until Monday, at about 5:00AM MST.
Google Static Map Image
State conditions legend State
Closure Closure
Public conditions legend Public
Weather warning legend Weather Warning