sweetapricity/bridgedeck-noaa huggingface dataset:
A nearly stationary front with upslope flow north of the front helped to produce thunderstorms in the evening hours.  Some became marginally severe.  There was one brief tornado reported in Pratt county.

Hail in ELLIS, KANSAS
From 16-MAY-10 18:40:00 to 16-MAY-10 18:40:00 (CST-6)
Location: PFEIFER
Magnitude: 0.75 
Reported by: Public

There was so much hail that drifts of hail were still observed the following morning.

Hail in PAWNEE, KANSAS
From 16-MAY-10 19:10:00 to 16-MAY-10 19:10:00 (CST-6)
Location: RAY
Magnitude: 0.88 
Reported by: Public

Hail in COMANCHE, KANSAS
From 16-MAY-10 19:15:00 to 16-MAY-10 19:15:00 (CST-6)
Location: BUTTERMILK
Magnitude: 0.88 
Reported by: Public

Most of hail was pea sized.

Hail in STAFFORD, KANSAS
From 16-MAY-10 19:48:00 to 16-MAY-10 19:48:00 (CST-6)
Location: ST JOHN
Magnitude: 0.88 
Reported by: Law Enforcement

Funnel Cloud in PRATT, KANSAS
From 16-MAY-10 20:24:00 to 16-MAY-10 20:25:00 (CST-6)
Location: PRESTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

A brief funnel cloud was observed.

Hail in FORD, KANSAS
From 16-MAY-10 17:21:00 to 16-MAY-10 17:21:00 (CST-6)
Location: KINGSDOWN
Magnitude: 0.88 
Reported by: Trained Spotter

Hail in COMANCHE, KANSAS
From 16-MAY-10 18:19:00 to 16-MAY-10 18:19:00 (CST-6)
Location: COLDWATER
Magnitude: 0.75 
Reported by: Law Enforcement

Hail in ELLIS, KANSAS
From 16-MAY-10 18:25:00 to 16-MAY-10 18:25:00 (CST-6)
Location: PFEIFER
Magnitude: 0.75 
Reported by: Public

There was also strong winds (unspecified speeds) that combined with the hail and destroyed several crop fields.

Hail in COMANCHE, KANSAS
From 16-MAY-10 18:33:00 to 16-MAY-10 18:33:00 (CST-6)
Location: COLDWATER
Magnitude: 1.00 
Reported by: Public

Hail in STAFFORD, KANSAS
From 16-MAY-10 19:52:00 to 16-MAY-10 19:52:00 (CST-6)
Location: ST JOHN
Magnitude: 0.75 
Reported by: Public

Hail in STAFFORD, KANSAS
From 16-MAY-10 20:25:00 to 16-MAY-10 20:25:00 (CST-6)
Location: NEOLA
Magnitude: 1.00 
Reported by: Public

Tornado in PRATT, KANSAS
From 16-MAY-10 20:33:00 to 16-MAY-10 20:34:00 (CST-6)
Location: PRESTON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

This was brief and weak tornado.

Hail in ELLIS, KANSAS
From 16-MAY-10 19:25:00 to 16-MAY-10 19:25:00 (CST-6)
Location: PFEIFER
Magnitude: 0.75 
Reported by: Public

Strong wind severely damaged wheat fields in the vicinity.

Hail in COMANCHE, KANSAS
From 16-MAY-10 18:35:00 to 16-MAY-10 18:35:00 (CST-6)
Location: COLDWATER
Magnitude: 1.00 
Reported by: Public
Thunderstorms redeveloped during the overnight hours but began to dissipate during the morning of the 19th, but no before dumping heavy rainfall.

Heavy Rain in SEWARD, KANSAS
From 19-MAY-10 08:18:00 to 19-MAY-10 08:18:00 (CST-6)
Location: KISMET
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall of 2.34 was reported during the early morning hours in Kismet.

Hail in HASKELL, KANSAS
From 19-MAY-10 09:50:00 to 19-MAY-10 09:50:00 (CST-6)
Location: TICE
Magnitude: 0.88 
Reported by: Public

Heavy Rain in BARBER, KANSAS
From 19-MAY-10 08:00:00 to 19-MAY-10 08:00:00 (CST-6)
Location: HARDTNER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall of 2.40 was reported during the early morning hours at a location 8 miles WNW of Hardtner.

Heavy Rain in HAMILTON, KANSAS
From 19-MAY-10 08:55:00 to 19-MAY-10 08:55:00 (MST-7)
Location: MAYLINE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Rainfall of 3.60 fell in the early morning hours at location 13 miles north of Kendall.
A weak front that became stationary and then started to lift north as a weak warm front helped to trigger a few severe thunderstorms during the evening.

Hail in HAMILTON, KANSAS
From 23-MAY-10 21:40:00 to 23-MAY-10 21:40:00 (MST-7)
Location: SYRACUSE
Magnitude: 1.00 
Reported by: Public

Hail in SCOTT, KANSAS
From 23-MAY-10 17:20:00 to 23-MAY-10 17:20:00 (CST-6)
Location: SCOTT CITY
Magnitude: 1.00 
Reported by: Trained Spotter

The hail was very brief.

Hail in SCOTT, KANSAS
From 23-MAY-10 17:31:00 to 23-MAY-10 17:31:00 (CST-6)
Location: SANDON
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in STANTON, KANSAS
From 23-MAY-10 22:15:00 to 23-MAY-10 22:15:00 (CST-6)
Location: MANTER
Magnitude: 1.00 
Reported by: Public

The hail was mostly penny sized.

Hail in SCOTT, KANSAS
From 23-MAY-10 17:00:00 to 23-MAY-10 17:00:00 (CST-6)
Location: SHALLOW WATER
Magnitude: 1.00 
Reported by: Public
Very unstable air (almost tropical like) combined with a slow moving upper level disturbance to produce thunderstorms in the afternoon.  One line of storms produced numerous funnel clouds and weak tornadoes and one hail report.  Heavy rainfall was also observed.

Heavy Rain in EDWARDS, KANSAS
From 19-MAY-10 08:00:00 to 19-MAY-10 15:00:00 (CST-6)
Location: KINSLEY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Rainfall of 2.25 fell during several rounds of thunderstorms during the day at a location 1 mile WSW of Kinsley.

Funnel Cloud in GRAY, KANSAS
From 19-MAY-10 16:47:00 to 19-MAY-10 16:47:00 (CST-6)
Location: CHARLESTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Rain in FORD, KANSAS
From 19-MAY-10 14:28:00 to 19-MAY-10 14:28:00 (CST-6)
Location: HOWELL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Rainfall of 1.86 fell in a short period of time at a location 7 miles southeast of the Haggard elevator.

Tornado in GRAY, KANSAS
From 19-MAY-10 17:26:00 to 19-MAY-10 17:28:00 (CST-6)
Location: INGALLS MUNI ARPT
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

This brief tornado did not strike anything.

Tornado in GRAY, KANSAS
From 19-MAY-10 17:57:00 to 19-MAY-10 17:59:00 (CST-6)
Location: CIMARRON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A brief and small tornado touched down just west of town.

Tornado in GRAY, KANSAS
From 19-MAY-10 18:03:00 to 19-MAY-10 18:06:00 (CST-6)
Location: CIMARRON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A 6 x 8 foot shed was destroyed by the small tornado.

Tornado in GRAY, KANSAS
From 19-MAY-10 16:48:00 to 19-MAY-10 16:51:00 (CST-6)
Location: INGALLS
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A brief landspout made contact for about 2 minutes.

Hail in KEARNY, KANSAS
From 19-MAY-10 19:30:00 to 19-MAY-10 19:30:00 (CST-6)
Location: LAKIN
Magnitude: 1.75 
Reported by: Trained Spotter

Tornado in GRAY, KANSAS
From 19-MAY-10 16:48:00 to 19-MAY-10 16:50:00 (CST-6)
Location: CHARLESTON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A brief landspout made contact for about 2 minutes.

Tornado in FINNEY, KANSAS
From 19-MAY-10 16:55:00 to 19-MAY-10 16:58:00 (CST-6)
Location: MANSFIELD
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

This brief tornado did not strike anything but did kick up some dust as the condensation funnel made contact with the ground.

Tornado in GRAY, KANSAS
From 19-MAY-10 16:56:00 to 19-MAY-10 17:00:00 (CST-6)
Location: CHARLESTON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A rope tornado with unspecified debris lasted 4 minutes.
An isolated thunderstorm producing sub-severe hail moved across portions of Sheridan County.

Hail in SHERIDAN, WYOMING
From 01-JUL-10 14:01:00 to 01-JUL-10 14:01:00 (MST-7)
Location: CLEARMONT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter
A few severe thunderstorms moved across the central and southern portions of the Billings Forecast Area during the evening hours of the 21st.

Thunderstorm Wind in SHERIDAN, WYOMING
From 21-JUL-10 22:41:00 to 21-JUL-10 22:41:00 (MST-7)
Location: SHERIDAN
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS
Isolated severe thunderstorms moved across portions of the Billings Forecast Area.

Thunderstorm Wind in BIG HORN, MONTANA
From 27-JUL-10 20:05:00 to 27-JUL-10 20:05:00 (MST-7)
Location: WYOLA
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Branches greater than 5 inches in diameter were broken off trees.

Thunderstorm Wind in PARK, MONTANA
From 27-JUL-10 16:05:00 to 27-JUL-10 16:05:00 (MST-7)
Location: WILSALL
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

An estimated wind gust of 60 mph was reported 11 miles NNE of Clyde Park.

Hail in BIG HORN, MONTANA
From 27-JUL-10 19:30:00 to 27-JUL-10 19:30:00 (MST-7)
Location: WYOLA
Magnitude: 1.00 
Reported by: Public

The hail damaged a garden and hay fields.
Unseasonably cold temperatures followed a cold front passage.

Frost/Freeze in EASTERN UINTA BASIN, UTAH
From 25-MAY-10 01:00:00 to 25-MAY-10 06:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Temperatures dropped during the night, with reported minimums throughout the eastern Uintah Basin ranging from 27 to 32 degrees Fahrenheit.
A late season winter storm brought accumulating snowfall the higher elevations of eastern Utah and western Colorado, including many of the highly traveled mountain passes.

Winter Weather in EASTERN UINTA MOUNTAINS, UTAH
From 18-MAY-10 16:00:00 to 19-MAY-10 23:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Snowfall amounts across the area ranged from 5 to 7 inches above the 9,000 foot level.
An area of low pressure moved through the Rocky Mountain region spreading a round of late season snow across all of the western Colorado mountains.

Winter Weather in GRAND AND BATTLEMENT MESAS, COLORADO
From 01-MAY-10 20:00:00 to 02-MAY-10 23:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall of 5 to 9 inches occurred.

Winter Weather in GORE AND ELK MOUNTAINS/CENTRAL MOUNTAIN VALLEYS, COLORADO
From 02-MAY-10 00:00:00 to 03-MAY-10 01:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall of 4 to 6 inches occurred with wind gusts up to 30 mph producing areas of blowing snow.

Winter Weather in WEST ELK AND SAWATCH MOUNTAINS, COLORADO
From 01-MAY-10 18:00:00 to 03-MAY-10 06:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall amounts across most of the area ranged from 5 to 12 inches.

Winter Weather in FLATTOP MOUNTAINS, COLORADO
From 01-MAY-10 17:00:00 to 02-MAY-10 14:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall of 3 to 7 inches occurred.

Winter Weather in UNCOMPAHGRE PLATEAU AND DALLAS DIVIDE, COLORADO
From 01-MAY-10 18:00:00 to 02-MAY-10 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall amounts above the 8,000 foot level ranged from 5 to 9 inches. Wind gusts up to 30 mph produced localized blowing snow.

Winter Weather in NORTHWESTERN SAN JUAN MOUNTAINS, COLORADO
From 01-MAY-10 18:00:00 to 03-MAY-10 06:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snowfall of 4 to 8 inches occurred with wind gusts up to 35 mph producing areas of blowing snow.

Winter Weather in SOUTHWESTERN SAN JUAN MOUNTAINS, COLORADO
From 01-MAY-10 20:00:00 to 03-MAY-10 06:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snowfall amounts across the area ranged from 4 to 10 inches. Winds gusted up to 40 mph generating areas of blowing and drifting snow.

Winter Weather in ELKHEAD AND PARK MOUNTAINS, COLORADO
From 01-MAY-10 17:00:00 to 02-MAY-10 15:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall of 3 to 9 inches occurred with wind gusts up to 30 mph producing some blowing snow.

Winter Weather in UPPER YAMPA RIVER BASIN, COLORADO
From 01-MAY-10 21:00:00 to 02-MAY-10 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall of 5 to 7 inches occurred.
An area of low pressure moved through the Rocky Mountain region spreading a round of late season snow across the mountains of eastern Utah.

Winter Weather in EASTERN UINTA MOUNTAINS, UTAH
From 01-MAY-10 15:00:00 to 02-MAY-10 03:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Snowfall of 4 to 7 inches occurred mainly above the 8,000 foot level.

Winter Weather in LA SAL & ABAJO MOUNTAINS, UTAH
From 01-MAY-10 21:00:00 to 02-MAY-10 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Snowfall of 5 to 6 inches occurred mainly above the 8,000 foot level. Wind gusts up to 35 mph generated areas of blowing snow.
Drought conditions through the month of may remained largely unchanged with abnormally dry conditions persisting across much of northwest Colorado. Slight improvement occurred with an area of moderate drought in Routt county being upgraded to abnormally dry.

Drought in ELKHEAD AND PARK MOUNTAINS, COLORADO
From 01-MAY-10 00:00:00 to 31-MAY-10 00:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

The southern portion of Routt county improved from moderate drought to abnormally dry conditions, while the northern part of Routt county improved to near normal.

Drought in UPPER YAMPA RIVER BASIN, COLORADO
From 01-MAY-10 00:00:00 to 31-MAY-10 00:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

The southern portion of the area improved from moderate drought to abnormally dry conditions, while the northern part of the area improved to near normal.

Drought in SOUTHWESTERN SAN JUAN MOUNTAINS, COLORADO
From 01-MAY-10 00:00:00 to 31-MAY-10 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

A small portion of the area including San Juan county and the northern part of Archuleta county developed abnormally dry conditions.
A strong, late season storm system spread heavy snowfall over the Colorado mountains as well as some of the higher valleys. A few of the lower valleys in western Colorado also received significant late season snowfall accumulations. This event began in April, so please see the April 2010 Storm Data Publication for additional information.

Winter Storm in GORE AND ELK MOUNTAINS/CENTRAL MOUNTAIN VALLEYS, COLORADO
From 01-MAY-10 00:00:00 to 01-MAY-10 07:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snowfall resulted in accumulations ranging from 12 to 24 inches. Winds gusted up to 50 mph producing some areas of blowing and drifting snow. The adverse weather conditions caused several vehicle accidents near the town of Aspen. This event began in April, so please see the April 2010 Storm Data Publication for additional information.

Winter Storm in ELKHEAD AND PARK MOUNTAINS, COLORADO
From 01-MAY-10 00:00:00 to 01-MAY-10 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snowfall resulted in accumulations ranging from 12 to 24 inches. Locally higher amounts of up to 30 inches were reported at the Tower SNOTEL site. Gusty winds up to 35 mph produced some areas of blowing and drifting snow. This event began in April, so please see the April 2010 Storm Data Publication for additional information.

Winter Storm in GRAND AND BATTLEMENT MESAS, COLORADO
From 01-MAY-10 00:00:00 to 01-MAY-10 04:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snowfall spread 12 to 26 inches of new snow across the area. Wind gusts up to 40 mph generated some areas of blowing snow. This event began in April, so please see the April 2010 Storm Data Publication for additional information.

Winter Storm in WEST ELK AND SAWATCH MOUNTAINS, COLORADO
From 01-MAY-10 00:00:00 to 01-MAY-10 07:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snowfall spread 10 to 24 inches of new snow across the area. Wind gusts ranging from 30 to 60 mph generated areas of blowing and drifting snow. The adverse weather conditions lead to the closure of Highway 50 over Monarch Pass. This event began in April, so please see the April 2010 Storm Data Publication for additional information.

Winter Storm in FLATTOP MOUNTAINS, COLORADO
From 01-MAY-10 00:00:00 to 01-MAY-10 07:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snowfall spread 10 to 21 inches of new snow across the area. Wind gusts up to 40 mph generated areas of blowing snow. This event began in April, so please see the April 2010 Storm Data Publication for additional information.
Two climbers were caught while descending Hangerman Peak.

Avalanche in WEST ELK AND SAWATCH MOUNTAINS, COLORADO
From 30-MAY-10 09:00:00 to 30-MAY-10 10:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Two climbers were descending Hangerman Peak when a block of cornice broke off of a ridge above them and struck both climbers. The two of them were carried an estimated 1,000 vertical feet. A helicopter was needed to rescue one of the climbers who was injured from the slide. The time of the event is estimated.
A late season winter storm brought accumulating snowfall the higher elevations of eastern Utah and western Colorado, including many of the highly traveled mountain passes.

Winter Weather in GORE AND ELK MOUNTAINS/CENTRAL MOUNTAIN VALLEYS, COLORADO
From 18-MAY-10 17:00:00 to 21-MAY-10 00:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall accumulations ranged from 3 to 9 inches above the 9,000 foot level. Wind gusts up to 45 mph produced some areas of blowing snow.

Winter Weather in FLATTOP MOUNTAINS, COLORADO
From 18-MAY-10 13:00:00 to 21-MAY-10 01:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall amounts across the area ranged from 5 to 9 inches.

Winter Weather in WEST ELK AND SAWATCH MOUNTAINS, COLORADO
From 18-MAY-10 16:00:00 to 19-MAY-10 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall amounts across the area ranged from 5 to 9 inches.

Winter Weather in ELKHEAD AND PARK MOUNTAINS, COLORADO
From 18-MAY-10 13:00:00 to 21-MAY-10 01:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall accumulations ranged from 5 to 12 inches with locally higher amounts of up to 15 inches reported at the Rabbit Ears SNOTEL site.
A few thunderstorms occurred during the evening of the 31st across the western portions of the Billings Forecast Area. One thunderstorm in particular was very strong and produced damaging microburst winds across Park County.

Thunderstorm Wind in PARK, MONTANA
From 31-JUL-10 13:40:00 to 31-JUL-10 13:40:00 (MST-7)
Location: PINE CREEK
Magnitude: 65.00 EG
Reported by: Trained Spotter

Microburst winds estimated at 75 mph uprooted an 18 inch diameter fir tree. The tree hit part of a home roof. In addition, a 24 inch cottonwood tree top was broken off and landed on power lines.

Thunderstorm Wind in PARK, MONTANA
From 31-JUL-10 14:00:00 to 31-JUL-10 14:00:00 (MST-7)
Location: LIVINGSTON
Magnitude: 53.00 MG
Reported by: Department of Highways

Thunderstorm Wind in SWEET GRASS, MONTANA
From 31-JUL-10 14:31:00 to 31-JUL-10 14:31:00 (MST-7)
Location: BIG TIMBER ARPT
Magnitude: 65.00 EG
Reported by: Trained Spotter

Winds caused two dirt devils in pastures plus the laying over of large trees. Sustained winds were estimated at 50 mph.

Thunderstorm Wind in STILLWATER, MONTANA
From 31-JUL-10 15:35:00 to 31-JUL-10 15:35:00 (MST-7)
Location: MOLT
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Thunderstorm Wind in YELLOWSTONE, MONTANA
From 31-JUL-10 15:43:00 to 31-JUL-10 15:43:00 (MST-7)
Location: (BIL)LOGAN ARPT BILL
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in PARK, MONTANA
From 31-JUL-10 13:45:00 to 31-JUL-10 13:45:00 (MST-7)
Location: PINE CREEK
Magnitude: 65.00 EG
Reported by: Trained Spotter

A microburst wind was reported to of taken off the tops of two huge Cottonwood trees, one landed on power lines and cutting off power, the other landed on and damaged a camper.

Thunderstorm Wind in PARK, MONTANA
From 31-JUL-10 13:57:00 to 31-JUL-10 13:57:00 (MST-7)
Location: LIVINGSTON
Magnitude: 64.00 MG
Reported by: ASOS

Thunderstorm Wind in PARK, MONTANA
From 31-JUL-10 17:40:00 to 31-JUL-10 17:40:00 (MST-7)
Location: CHICO
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Thunderstorm Wind in CARBON, MONTANA
From 31-JUL-10 19:31:00 to 31-JUL-10 19:31:00 (MST-7)
Location: FOX
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

An estimated wind gust of 60 mph was reported 5 miles NNE of Red Lodge.
A Sheridan man died after being struck by lightning in the Big Horn Mountains. The man died at a Billings hospital from cardiac arrest, one day after the lightning strike. A U.S. Forest Service employee found the 63 year old man in an unresponsive state on a Forest Service road.

Lightning in SHERIDAN, WYOMING
From 11-JUL-10 00:00:00 to 11-JUL-10 00:00:00 (MST-7)
Location: DAYTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper
An isolated thunderstorm producing quarter size hail moved across Powder River County.

Hail in POWDER RIVER, MONTANA
From 11-JUL-10 12:46:00 to 11-JUL-10 12:46:00 (MST-7)
Location: EPSIE
Magnitude: 1.00 
Reported by: Trained Spotter

Marble to quarter size hail covered the ground.
A low pressure circulation over southern California ejected northeast over Arizona in response to a much stronger trough of low pressure moving eastward over the Pacific Ocean.  The ejecting low brought increasing moisture, lift, and dynamics over northern Arizona which produced scattered thunderstorms with heavy rain and quarter sized hail.

Flash Flood in COCONINO, ARIZONA
From 03-OCT-10 14:48:00 to 03-OCT-10 21:00:00 (MST-7)
Location: HAVASUPAI
Flood cause: Heavy Rain
Property damage: 1.63M
Crop damage: 0.00K
Reported by: Law Enforcement

Supai Police reported a two foot wall of water moving down Hualapai Canyon toward the Village of Supai. The Suapi USGS river gage reported a peak flow of about 600 CFS at around 500 PM.   Flash flooding was reported in the campground at around 320 PM. This flood water may have been from side canyons and from Havasu Creek. Campers, 143 in all, in the campground were air lifted to safety. Three tribal pack animals were killed by the flash flood. The canyon was closed to tourists indefinitely due to the damages caused to the trail and campground. The President of the United States declared the Havasupai Canyon a major disaster area and ordered Federal aid to supplement State, Tribal, and local recovery efforts. The estimated cost to replace and repair the damaged or destroyed infrastructure is $1,630,000.

Hail in YAVAPAI, ARIZONA
From 03-OCT-10 13:30:00 to 03-OCT-10 13:40:00 (MST-7)
Location: SELIGMAN
Magnitude: 1.00 
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Dime sized hail fell for ten minutes before quarter-sized (1 inch in diameter) started to fall.  The hail dented cars and shattered plastic vents on RV trailers.
A strong low pressure system moving south over California produced large scale upward lift,  deep moisture, and strong up-slope flow which lead to and scattered thunderstorms over northern Arizona.

Hail in YAVAPAI, ARIZONA
From 04-OCT-10 11:30:00 to 04-OCT-10 11:40:00 (MST-7)
Location: SELIGMAN ARPT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Penny sized hail accumulated to a depth of one inch.

Hail in COCONINO, ARIZONA
From 04-OCT-10 15:05:00 to 04-OCT-10 15:10:00 (MST-7)
Location: PARKS
Magnitude: 0.50 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Employee

A narrow strip of hail covered the pavement on Interstate 40 near mile post 180.  Two cars lost control and slid off the road.