Book Cliffs (UTZ487) - Fire Weather Forecast

UTZ487-161245-
UTZ487-161245-
Book Cliffs-
236 PM MDT Tue Jul 15 2025

Fire Weather Planning Forecast for Wrn Colorado and Ern Utah
National Weather Service Grand Junction CO
236 PM MDT Tue Jul 15 2025

.DISCUSSION... Moisture is gradually moving back into our area. 
Today this moisture is resulting in isolated dry thunderstorms. 
As a result, the main concerns are strong wind gusts around storms
and lightning. As atmospheric moisture increases over the coming 
days, shower and thunderstorm coverage should increase, and 
precipitation will have a greater chance of making it to the 
ground. Although moisture and minimum relative humidity are  
expected to increase, this change will be gradual and localized 
Red Flag conditions are possible where it is dry due to gusts 
above critical fire weather thresholds in local areas. 

...GUSTY ERRATIC WINDS CAN BE EXPECTED NEAR ANY SHOWERS
OR THUNDERSTORMS...
...THE SMOKE DATA IS CALCULATED FROM AN AVERAGE AT 6000 FEET MSL...


.TONIGHT...
Sky/weather.........Near 5000 feet, partly cloudy (40-50%). Near 
                    8000 feet, mostly cloudy (60-70%) until 2400, 
                    then partly cloudy (40-50%). Areas of smoke. 
                    Isolated showers and thunderstorms until 2400. 
Chc of lightning....20 percent. 
Min temperature.....60-70 F near 5000 feet 
                    54-64 F near 8000 feet. 
   24 hr trend......1 degree cooler. 
Max humidity........34-44% near 5000 feet 
                    40-50% near 8000 feet. 
   24 hr trend......20% wetter. 
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming 
                    downslope/downvalley 3 to 6 mph by sunset.
CWR.................10 percent. 
Mixing Height.......9000 ft AGL until 2000. 1000 ft AGL after 2100. 
Transport Winds.....Southwest 5 to 10 mph. 
Clearing Index......1050 until 1900. Less than 500 after 2100. 

.WEDNESDAY...
Sky/weather.........Near 5000 feet, partly cloudy (50-60%) after 
                    1200. Mostly sunny (10-20%) until 1200. Near 
                    8000 feet, mostly cloudy (60-70%) after 1200. 
                    Areas of smoke. Scattered dry thunderstorms and 
                    showers after 1200. 
Chc of lightning....30 percent. 
Max temperature.....83-93 F near 5000 feet 
                    77-87 F near 8000 feet. 
   24 hr trend......5 degrees cooler. 
Min humidity........11-16%. 
   24 hr trend......4% wetter. 
20-foot winds.......Upslope/upvalley winds 4 to 8 mph. Localized 
                    gusts up to 20 mph in the afternoon. 
CWR.................20 percent. 
Mixing Height.......1500 ft AGL until 0900. 11500 ft AGL after 
                    1100. 
Transport Winds.....West 5 to 10 mph. 
Clearing Index......Less than 500 until 0900. 1050 after 1100. 

.WEDNESDAY NIGHT...
Sky/weather.........Partly cloudy (40-50%). Near 5000 feet, 
                    isolated showers and dry thunderstorms until 
                    2400, areas of smoke after 2400. Near 8000 feet 
                    , scattered showers and isolated dry 
                    thunderstorms until 2400, areas of smoke. 
Chc of lightning....10 percent. 
Min temperature.....58-68 F near 5000 feet 
                    52-62 F near 8000 feet. 
   24 hr trend......1 degree cooler. 
Max humidity........37-47%. 
   24 hr trend......2% wetter. 
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming 
                    downslope/downvalley 3 to 6 mph by sunset.
CWR.................10 percent. 
Mixing Height.......9000 ft AGL until 1900. 1500 ft AGL after 2000. 
Transport Winds.....South 5 mph. 
Clearing Index......1050 until 1900. Less than 500 after 2000. 

.THURSDAY...
Sky/weather.........Mostly sunny (10-20%) until 1200, then partly 
                    cloudy (40-50%). Near 5000 feet, scattered 
                    showers and isolated dry thunderstorms after 
                    1200. Near 8000 feet, scattered dry 
                    thunderstorms and showers after 1200. 
Chc of lightning....20 percent. 
Max temperature.....83-93 F near 5000 feet 
                    76-86 F near 8000 feet. 
   24 hr trend......Unchanged. 
Min humidity........12-17%. 
   24 hr trend......Unchanged. 
20-foot winds.......Upslope/upvalley winds 4 to 8 mph. Localized 
                    gusts up to 20 mph in the afternoon. 
CWR.................10 percent. 
Mixing Height.......3500 ft AGL until 1000, then 12000 ft AGL. 
Transport Winds.....Southwest 5 mph. 
Clearing Index......Less than 500 until 1000. 1050 after 1200. 

.FORECAST FOR DAY 3 THROUGH 7...
.FRIDAY...Mostly cloudy. Scattered showers and thunderstorms .
Lows 60-70. Highs 84-94. Winds less than 15 mph. 
.SATURDAY...Partly cloudy. Scattered showers and thunderstorms .
Lows 56-66. Highs 83-93. Winds less than 15 mph. 
.SUNDAY...Partly cloudy. Isolated showers and thunderstorms near
6000 feet and scattered showers and thunderstorms near 8000 feet
. Lows 57-67. Highs 84-94. Winds less than 15 mph. 
.MONDAY...Mostly clear. Isolated showers and thunderstorms . Lows
58-68. Highs 86-96. 
.TUESDAY...Mostly clear. Isolated showers and thunderstorms near
8000 feet. Lows 59-69. Highs 87-97.