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Reports on ID 21
ID 21
Between I-84 and Robie Creek Road (8 miles north of the Boise area). The road is wet. Cloudy skies. Look out for large animals on the roadway. There is danger of a rock fall.
Last updated today at 7:05am MST
Between Highland Valley Summit (8 miles north of the Boise area) and King Road (Idaho City). Look out for slush on the roadway. Look out for icy patches. The road is wet. Cloudy skies. Expect rain. Look out for large animals on the roadway. There is danger of a rock fall.
Last updated today at 6:47am MST
Between King Road and Garden Valley Road (32 miles north of the Idaho City area). Look out for slush on the roadway. Look out for packed snow patches on the roadway. Look out for a mix of rain and snow. There is danger of a rock fall. Snow chains are recommended.
Last updated today at 6:47am MST
Between Garden Valley Road (32 miles north of the Idaho City area) and Grandjean Road (35 miles south of the Stanley area). Look out for slush on the roadway. Look out for packed snow on the roadway. 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 today at 6:48am MST
Between Grandjean Road and The Custer - Boise County Line (24 to 35 miles south of the Stanley area). The road is closed. There is danger of an avalanche.

Comment: SH 21 closed from milepost 93.75 to milepost 105.5. Highway remains closed until further notice.
Last updated today at 6:26am MST
Between Grandjean Road (24 miles south of the Stanley area) and ID 75 (Stanley). A Winter Storm Warning is in effect. Until tomorrow at about 5:00AM MST.

Comment: Winter Storm Warning issued December 21 at 4:07AM MST until December 22 at 5:00AM MST by NWS

.EXPECT SNOW LEVELS TO GRADUALLY RISE TO 7000 TO 7500 FEET THIS AFTERNOON. TOTAL SNOWFALL OF OVER A FOOT IS EXPECTED ABOVE 7500 FEET WITH 6 TO 10 INCHES UP TO 7000 FEET. SNOW SHOULD GRADUALLY TAPER OFF TONIGHT AS SNOW LEVELS DROP ONCE AGAIN TO 4500 FEET BY MONDAY MORNING WITH THE STORM ENDING.

Full NWS alert
Last updated today at 4:09am MST
Between Banner Creek Summit and The Custer - Boise County Line (22 to 24 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. Be ready for patchy fog. Look out for large animals on the roadway. There is danger of a rock fall.
Last updated yesterday at 8:59pm MST
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 today at 6:52am MST