Excessive Heat — Little Colorado River Valley in Navajo County, Arizona

2017-06-17 to 2017-06-24 · Little Colorado River Valley in Navajo County, Arizona

Event narrative

The high of 102 in Winslow on June 17 broke the previous record of 100 set in 1974.

The high of 103 in Winslow on June 18 tied the previous record last set in 1940.

The high of 105 in Winslow on June 19 broke the previous record of 104 set in 2016.

The high of 103 at the Petrified Forest on June 19 broke the previous record of 101 set in 2016.

The high of 108 in Winslow on June 21 broke the previous record of 106 set in 2012.

The high of 105 at Petrified Forest on June 21 broke the previous record of 103 set in 2012.

The high of 107 in Winslow on June 22 broke the previous record of 105 set in 1961.

The high of 104 in Winslow on June 23 tied record last set in 1961.

The high of 104 in Winslow on June 24 tied record last set in 1961.

Wider weather episode

Very strong high pressure aloft developed across the Desert Southwest in mid to late June. This lead to prolonged excessive heat across the lower deserts of northern Arizona. High temperatures exceeded 110 over the lower elevations of Yavapai County and along the Colorado River in the Grand Canyon. Numerous high temperature records were tied or broken, even at higher elevations.

Source: NOAA Storm Events Database, event_id 707213. Narrative written by the NWS forecast office that issued the report.