National Weather Service United States Department of Commerce

July 2018 Climate Summary for Eastern Utah and Western Colorado

*Please note that all data mentioned is collected from our automated observing stations from 10 different airports across eastern Utah and western Colorado. Some of our cooperative observers in more remote areas may have measured warmer or colder temperatures, or more or less precipitation than what was mentioned in this summary.* 

July 2018 was hot and unsettled with above normal temperatures and a good dose of scattered convection. An area of high pressure remained across the southwestern U.S. throughout the month with the center of the high shifting continuously. Depending on where the high set up, monsoonal moisture was able to be pulled into the region from the south. Scattered afternoon showers and thunderstorms were common throughout July with several storms producing heavy rain, small hail and lightning. These bouts of heavy rain resulted in some flash flooding and debris flow across recent burn scars in the area. Mud, water and debris flowed on the 416 burn scar after heavy rains on July 17th and again on the 24th. This impacted nearby houses and campgrounds and even shut down portions of Highway 550. The Lake Christine Fire also experienced minor debris flow on July 28th. Showers and thunderstorms produced gusty outflow winds during July with the Grand Junction Regional Airport hitting 70 MPH on July 17th from nearby storms.

 

As a result of high pressure overhead, July ended up being a hot month. Temperatures were above normal with mean temperatures generally ranging from 3 to 7 degrees above normal for the month. Several sites hit the triple digits multiple times. The Grand Junction, Canyonlands, Vernal and Rifle Airports all hit 100-plus degrees at least once. The highest reported temperature during the month from these stations was 102 degrees which occurred at the Grand Junction Regional Airport on July 19th and at the Canyonlands Regional Airport in Moab, Utah on July 7th, 8th, and 19th. The coldest temperature of 37 degrees was measured at the Craig-Moffat Airport on July 1st.

 

Again, though we had some heavy rain-producing storms at times in July, these storms were very scattered in coverage. As a result, all ten automated stations at various airports across the area ended the month with below normal precipitation. The Cortez Municipal Airport was near normal after receiving 1.25 inches throughout the month, only 0.04 inches below normal. Other sites ranged from half an inch to over an inch below normal. The greatest deficit occurred at the Aspen Airport where only 0.58 inches of rain fell, 1.13 inches below normal.

 

Grand Junction had an average monthly temperature of 82.5 degrees which was 4.3 degrees above normal. The highest temperature was 102 degrees on July 19th and the lowest was 57 on the 1st. 0.08 inches of rain fell which was 0.61 inches below normal for the month.

 

Taking a quick look ahead to August, the official forecast from the Climate Prediction Center (http://www.cpc.ncep.noaa.gov/products/predictions/30day/) shows odds favoring warmer than normal temperatures continuing across eastern Utah and western Colorado with wetter than normal conditions.

 

The preliminary climate summary for some of our automated stations can be found on the attached slide show. For more climate information from other sites, please visit our climate page on our website at http://w2.weather.gov/climate/index.php?wfo=gjt (select the NOWDATA tab for even more sites). You can also follow us on Facebook (@NWSGrandJunction) or Twitter (@NWSGJT).