Hail, Garfield
- When
- July 18, 5:20 PM MST
- Where
- Garfield County, 10 mi S of Cohagen
- Measured
- 0.75 in hail
- Reported by
- TRAINED SPOTTER
- Coordinates
- 46.883, -106.600
Hail in Montana, July 18, 2001
1 hail, as filed by the National Weather Service.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 1
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
What forecasters said that day
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Glasgow, MT wrote its last area forecast discussion before the first event at Jul 18, 1:55 PM MST, 3 hours 25 minutes earlier.
Area forecast discussion, Jul 18, 1:55 PM MST, 3 hours 25 minutes before
NORTHEAST MONTANA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE GLASGOW MT
255 PM MDT WED JUL 18 2001
...WILL ISSUE FLASH FLOOD WATCH FOR ERN ZONES TONIGHT...
UPPER LOW OVER CENTRAL ALBERTA WITH AN UPPER TROF OVER THE PACIFIC
COAST WILL REMAIN IN PLACE THROUGH FRI. WITH UPPER RIDGE OVER THE
CENTRAL US...SW FLOW ALOFT WILL CONTINUE OVER MT WITH SEVERAL
SHORTWAVES EXPECTED TO AFFECT NE MT INTO THE WEEKEND.
IN THE SHORT TERM...DRY LINE BOUNDARY EAST OF NEAR OLF AND CIRCLE
BRINGING SOMEWHAT DRIER AIR INTO THE REGION THIS AFTERNOON.
MESOETA AND AVN MOVES THIS DRYLINE TO THE NODAK BORDER THIS EVENING
BUT DEW POINTS ARE REMAINING IN THE LOWER 50S BEHIND THIS DRY LINE
WITH ENOUGH INSTABILITY TO FIRE CONVECTION. AHEAD OF THE DRY
LINE...DEW POINTS ARE NEAR 60 AND THE LAPS ANALYSIS SHOWS CAPE AS
HIGH AS 2400 J/KG AROUND GDV WITH LI OF -7. CONDITIONS FAVORABLE FOR
SEVERE CONVECTION THIS EVENING...ESP EAST OF THE DRY LINE. WILL
MENTION SCT THUNDERSTORMS ALL ZONES WITH THE HIGHEST POPS IN THE
EAST. GROUND OVER ERN ZONES REMAINS SATURATED FROM LAST NIGHTS RAIN.
ANY THUNDERSTORM THAT DEVELOPS COULD DEPOSIT A QUICK INCH OR TWO OF
RAIN. WILL ISSUE A FLASH FLOOD WATCH FOR TONIGHT FOR ERN PART OF
CWA.
ON THURSDAY...MODELS HAVE THE BEST INSTABILITY OVER SE MT.
HOWEVER...THE MAIN SHORTWAVE ENERGY TRACKS OVER NE MT. MESOETA
BRINGS A VORT COUPLET THROUGH NE MT BETWEEN 18Z AND 21Z. MESOETA HAS
UNSTABLE AIR FORECASTED EAST OF THE VORT TRACK WHICH IS THRU
JDN...OLF AND PLENTYWOOD WHICH IS CLOSE TO A MESOETA DRY LINE
BOUNDARY THAT SEPARATES DEW POINTS IN THE 40S FROM DEW POINTS IN THE
60S. CAPE IS FORECASTED TO PEAK AROUND 2000 J/KG ALONG AND EAST OF
THE YELLOWSTONE RIVER AROUND 18Z. MESOETA FORECASTS PRECIPTABLE
WATER AS HIGH AS 1.60 INCHES BETWEEN GDV AND WIBAUX AT 21Z ON THU.
ANY THUNDERSTORMS THAT DO DEVELOP IN THE ERN HALF OF GGW CWA COULD
ONCE AGAIN BE A FLASH FLOOD CONCERN WITH SATURATED GROUND.
THU NIGHT AND FRIDAY...WITH UNSTABLE AIR REMAINING OVER ERN MT AND
SHORTWAVES CONTINUING TO TRACK OVER NE MT...WILL KEEP A CHANCE OF
THUNDERSTORMS IN THE FORECAST. MESOETA DOES BRING ANOTHER VORT
COUPLET THROUGH THE NW PART OF GGW CWA BETWEEN 12Z AND 15Z FRIDAY
WITH A FEW WEAKER VORTS BEFORE AND AFTER.
EXTENDED...MEDIUM RANGE MODELS IN DISAGREEMENT WITH THE WESTERN
CONUS BEYOND DAY 4 (SUNDAY). THE CLOSED LOW OVER WESTERN CANADA
LIFTS OUT ACCORDING TO THE MRF/CANADIAN AND ECMWF SUNDAY...BUT THE
CANADIAN AND THE ECMWF BUILD A REX BLOCK (HIGH OVER LOW) OVER
BRITISH COLUMBIA/PAC NW WHILE THE MRF BUILDS A BROAD RIDGE INTO MT.
DIFFERENCES ARE GREATEST ON DAY 7. WILL THEREFORE KEEP WITH A
PERSISTENCE FORECAST THROUGH THE EXTENDED. JAMBA
KGGW 060/085 063/085 058/083 056/085 058/084 061/085 061/085
TTBBBBB 793433/7633333
KGDV 061/085 061/086 057/085 058/085 058/084 060/084 060/084
TTBBBBB 794433/7633333
.GGW...FLASH FLOOD WATCH TONIGHT FOR ZONES 019-020-022>027-062.The radar
The Glasgow radar (KGGW), 147 km away, was scanning. The volume nearest the first event began at 00:22 UTC.
Event by event
1 hail. Local standard time, as filed.
What these are
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Tornadoes and Flash Flooding in North Dakota, July 18 to 19, 2001
- Tornadoes and Flash Flooding in Minnesota, July 18, 2001
- Tornadoes and Flash Flooding in South Dakota, July 18 to 19, 2001
- Hail and Damaging Winds in Kansas, July 18, 2001
- Lightning Strike in Wisconsin, July 18, 2001
- Tornado and Damaging Wind in Nebraska, July 18, 2001
- Damaging Wind in Nebraska, July 18, 2001
- Flash Flood in Ohio, July 18, 2001
- Damaging Wind in Arizona, July 18, 2001
- Tornado in North Dakota, July 18, 2001
- Flash Flood and Hail in Montana, July 18, 2001
- Lightning Strike in New Jersey, July 18, 2001
More
Every storm in Montana in 2001Every state in 2001This day in weather historyWarnings in Montana, July 2001
Sources
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5262265.