Grand storm history

Major flooding in Moab and Castle Valley from strong thunderstorm that produced very heavy rain across town, Mill Creek, North Mill Creek, Kane Creek and a drainage above Castle Valley. 1 inch of rain fell in 15 minutes for a rainrate of 4 inches per hour. 2 reported missing in M…

Flash flood waters at least four feet deep flowed down the normally dry Bittercreek Wash and swept away a jeep which had been driven into the flood waters where the Tabeguache Trail crosses the wash. The driver was able to get out of the vehicle and reach the bank while the passe…

More than 50 people were stranded overnight in Grand County, Utah after heavy rain from severe thunderstorms wiped out a portion of Mineral Bottom Road which led to a remote boat ramp. The rain completed demolished a section of switchbacks with large boulders accumulating.

Training thunderstorms produced upwards of 1 to 2 inches of rain within one to two hours in an around Moab. The Mill Creek Parkway - a recreational path that runs through the center of Moab, was reported to be 'completely decimated' as a result of the flooding. Several areas had …

Heavy rain led to flash flooding in downtown Moab.

Heavy rainfall within a short period of time resulted in flash flooding across the heavily used Mineral Bottom Road. Mineral Bottom Road was deeply washed out in the switchback section and an extensive amount of debris covered the road, which remained impassable as of mid Septemb…

At 806 MST on September 12, an NWS employee reported 1 inch diameter hail 25 miles NNW of Castle Valley, Utah. Some hail stones a little bigger than one inch fell.

At 844 MST on September 12, law enforcement reported 1.25 inch diameter hail 17 miles NW of Moab, Utah.

At 1024 MST on September 12, public reported 0.75 inch diameter hail in Moab, Utah.

National Park Service employees at Arches National Park reported Cache Valley Road had washed out near the lower Delicate Arch viewpoint.

Kane Creek Boulevard/Kane Springs Road and Potash Road reported as impassable due to flooding and mud on the roadways.

Law Enforcement reported standing water on Interstate 70 near Cisco, UT due to heavy rain from passing thunderstorms.

Utah Department of Transportation traffic cameras indicated flooding/ponding of water at the intersection of US Highway 191 and State Route 128, north of the town of Moab. This was due primarily to heavy rainfall on already saturate soils. Impacts were minimal and once the rain s…

The Bryson Canyon RAWS station recorded a gust to 60 mph in association with a passing line of thunderstorms. To the south, the KCNY ASOS at Canyonlands Airport recorded a gust to 54 mph in association with this same line. No reports of damages, injuries, or fatalities were repor…

A thunderstorm wind gust of 63 mph was measured at the Canyonlands Regional Airport.

A strong storm passed over Castle Valley area and produced hail dime to penny size.

Heavy rain due to thunderstorms over the area resulted in 1.5 to 2 inch per hour rainfall rates with pea size hail mixed in. This resulted in flooding across downtown Moab with 2 feet of water flowing through downtown. Mill Creek saw a rise in water levels which runs through town…

A strong to severe storm passed over Thompson Springs and produced hail ranging from 0.7 to 1.25 inches in diameter.

A thunderstorm that formed over the higher terrain south and west of Canyonlands Airport in eastern Utah eventually drifted over the adjacent lower terrain. As it did so, it produced two wind gusts to 58 mph, in addition to wind gusts of lower values. These gusts were recorded at…

A strong to severe thunderstorm tracked from west to east along I-70 on the afternoon of the 27th, producing strong to severe wind gusts in addition to other hazards. Wind gusts ranged from 45 mph to 61 mph. The peak gust of 61 mph was recorded at the Utah Department of Transport…

Public reported measured hail of 1.5 inches in downtown Moab at 3:18 PM MDT in association with a severe thunderstorm. No reports of damage received.

Local emergency management in Moab reported hail just shy of an inch in association with a severe thunderstorm moving over the area. No reports of hail damage were received.

Public reported 1 inch hail in downtown Moab in association with a severe thunderstorm moving through the area.

A trained spotter reported 1.0 inch hail in association with a severe thunderstorm that moved through Moab on the afternoon of the 27th.

Public reported an estimated hail size of 1.0 inches, comparable to a quarter, in association with a severe thunderstorm moving over Moab. No hail damage was reported.

Trained spotter reported 1.0 inch hail in association with a severe thunderstorm that moved over the Moab area on the afternoon of the 27th. No damage was reported.

A severe thunderstorm moved over the Moab area on the afternoon of the 27th, putting down very heavy rain and high rain rates. This caused flooding and debris flows across the area, including near Arches National Park. Flooding and debris flows outside the park on Highway 191 led…

Heavy rainfall from strong to severe thunderstorms moved over the Moab area, causing flash flooding through the downtown Moab streets as well as the Mill Creek drainage where water was running over a few of the roads. Rainfall estimates of 0.8 to 1.5 inches fell during this time.…

A thunderstorm developed near Green River, UT on the afternoon of the 25th and produced strong to severe wind gusts. Only one severe wind gust was recorded. This was 58 mph at the Utah Climate Center - AGMET mesonet site approximately 5 miles north of Green River. No reports of d…

A severe thunderstorm moved through portions of Grand County on the evening of the 21st, producing severe winds in addition to other hazards. The strongest winds likely occurred south of the KCNY ASOS at Canyonlands Field, as the core of the storm moved through Moab, about 10 mil…

Public reported an estimated hail size of 1.0 inches in association with a severe thunderstorm moving over the Moab area on the afternoon of the 21st. No damage was reported.

Trained Spotter reported 1.0 inch hail in addition to heavy rain associated with a severe thunderstorm moving through the Moab area on the afternoon of the 21st.

A peak wind gust of 66 MPH was measured by the automated weather station at the Canyonlands Regional Airport near Moab, Utah.

A peak wind gust of 59 MPH was measured by the automated weather station at the Canyonlands Regional Airport near Moab.

A 38-year-old woman was swept away in a flash flood at Grand County's Mary Jane Canyon as a result of heavy rains occurring upstream of the canyon. 30 minute rates looked to exceed 0.40 to 0.60 inches which then flowed downstream, flooding the slot canyon. The subject reported th…

Heavy rain from thunderstorms over the Mill Creek drainage resulted in a spillover on Powerhouse Dam in Grand County. Radar estimated 0.80 to 1.10 inches of rain fell over the North Fork Mill Creek drainage.

A peak wind gust of 60 MPH was measured by the automated weather station at the Canyonlands Field Airport outside of Moab.

A peak wind gust of 60 MPH was measured by the automated weather station at the Canyonlands Field Airport outside of Moab.

A peak wind gust of 63 MPH was measured by the automated weather station at the Canyonlands Field Airport outside Moab.

A peak wind gust of 58 MPH was measured by the automated weather station at the Canyonlands Field Airport outside Moab.

The Bureau of Land Management reported high flows along the Colorado River near Moab. This led to flooding at the takeout boat ramp near Moab as well as in several campgrounds along the river. This included the King's Bottom, Williams Bottom, Jaycee Park, Hal Canyon, Goose Island…

Warm temperatures increased snowmelt and caused flooding on the low-lying Stocks Drive near Utah Highway 191.

Warm temperatures increased snowmelt and caused flooding on the low-lying Sunny Acres Lane, which sits near Pack Creek, near Utah Highway 191.

Increased snowmelt along the Green River resulted in flooding on portions of Mineral Bottom Road.

Several inches to over a foot of dime-sized hail accumulated in Green River and along adjacent portions of I-70.

Debris as a result of heavy rain from thunderstorms was cleared off I-70 between mile markers 168 and 170 from both the eastbound and westbound lanes.

Numerous roads were closed in Spanish Valley due to flash flooding as a result of heavy rain from thunderstorms. This included Shumway Lane and Old City Park, Floy, Hastings, Sunny Acres, and Kerby Roads. Roads remained closed overnight. The Pack Creek gauge on Pack Creek Road re…

A funnel cloud was spotted roughly in the vicinity of Church Rock by the public looking east from Utah Highway 191.