Alert archive / Montana / High Wind Warnings in 2020
High Wind Warning 6, NWS Great Falls, MT
NWS Great Falls, MT issued this high wind warning at May 20, 2020, 9:41 PM MDT. It took effect at May 21, 2020, 9:00 AM MDT. It was in force for 11 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 20, 2020, 9:41 PM MDT (03:41 UTC)
- In effect from
- May 21, 2020, 9:00 AM MDT
- Expired
- May 21, 2020, 8:00 PM MDT
- In force
- 11 hr
- Issued by
- NWS Great Falls, MT
The text
As transmitted.
483 WWUS75 KTFX 210341 NPWTFX URGENT - WEATHER MESSAGE National Weather Service Great Falls MT 941 PM MDT Wed May 20 2020 MTZ009-010-048-220200- /O.UPG.KTFX.HW.A.0008.200521T1700Z-200522T0200Z/ /O.NEW.KTFX.HW.W.0006.200521T1500Z-200522T0200Z/ Northern Rocky Mountain Front-Eastern Glacier- Southern Rocky Mountain Front- Including Logan Pass, Browning, Heart Butte, Cut Bank, Bynum, Choteau, and Augusta 941 PM MDT Wed May 20 2020 ...HIGH WIND WARNING IN EFFECT FROM 9 AM TO 8 PM MDT THURSDAY... * WHAT...Southwest winds 30 to 40 mph, with gusts up to 65 mph, are expected. * WHERE...Northern Rocky Mountain Front, Eastern Glacier and Southern Rocky Mountain Front. * WHEN...From 9 AM to 8 PM MDT Thursday. * IMPACTS...Gusty winds could blow down limbs, trees, and power lines. A few power outages are possible. Travel will be difficult, especially for high profile vehicles and those pulling lightweight trailers. * ADDITIONAL DETAILS...Recreation on area lakes and reservoirs will be hazardous due to choppy conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. Use caution if you must drive. && Moldan $$ MTZ044-046-220200- /O.NEW.KTFX.HW.W.0006.200521T1500Z-200522T0200Z/ Toole-Eastern Pondera- Including Shelby, Sunburst, Brady, and Conrad 941 PM MDT Wed May 20 2020 ...HIGH WIND WARNING IN EFFECT FROM 9 AM TO 8 PM MDT THURSDAY... * WHAT...Southwest winds 30 to 40 mph, with gusts up to 65 mph, are expected. * WHERE...Toole and Eastern Pondera. * WHEN...From 9 AM to 8 PM MDT Thursday. * IMPACTS...Gusty winds could blow down limbs, trees, and power lines. A few power outages are possible. Travel will be difficult, especially for high profile vehicles and those pulling lightweight trailers. * ADDITIONAL DETAILS...Recreation on area lakes and reservoirs will be hazardous due to choppy conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && Moldan $$ For more information from the National Weather Service visit http://weather.gov/greatfalls
3 follow-up statements
739 WWUS75 KTFX 211136 NPWTFX URGENT - WEATHER MESSAGE National Weather Service Great Falls MT 536 AM MDT Thu May 21 2020 MTZ009-010-044-046-048-220200- /O.CON.KTFX.HW.W.0006.200521T1500Z-200522T0200Z/ Northern Rocky Mountain Front-Eastern Glacier-Toole- Eastern Pondera-Southern Rocky Mountain Front- Including Logan Pass, Browning, Heart Butte, Cut Bank, Shelby, Sunburst, Brady, Conrad, Bynum, Choteau, and Augusta 536 AM MDT Thu May 21 2020 ...HIGH WIND WARNING REMAINS IN EFFECT FROM 9 AM THIS MORNING TO 8 PM MDT THIS EVENING... * WHAT...Southwest winds 30 to 40 mph, with gusts up to 65 mph, are expected. * WHERE...Eastern Glacier, Southern Rocky Mountain Front, Eastern Pondera, Northern Rocky Mountain Front and Toole. * WHEN...From 9 AM this morning to 8 PM MDT this evening. * IMPACTS...Gusty winds could blow down limbs, trees, and power lines. A few power outages are possible. Travel will be difficult, especially for high profile vehicles and those pulling lightweight trailers. * ADDITIONAL DETAILS...Recreation on area lakes and reservoirs will be hazardous due to choppy conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && Moldan $$ For more information from the National Weather Service visit http://weather.gov/greatfalls
441 WWUS75 KTFX 212005 NPWTFX URGENT - WEATHER MESSAGE National Weather Service Great Falls MT 205 PM MDT Thu May 21 2020 MTZ009-010-044-046-048-220200- /O.CON.KTFX.HW.W.0006.000000T0000Z-200522T0200Z/ Northern Rocky Mountain Front-Eastern Glacier-Toole- Eastern Pondera-Southern Rocky Mountain Front- Including Logan Pass, Browning, Heart Butte, Cut Bank, Shelby, Sunburst, Brady, Conrad, Bynum, Choteau, and Augusta 205 PM MDT Thu May 21 2020 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING... * WHAT...West to southwest winds 30 to 40 mph, with gusts up to 65 mph, are expected. * WHERE...Eastern Glacier, Southern Rocky Mountain Front, Eastern Pondera, Northern Rocky Mountain Front and Toole. * WHEN...Until 8 PM MDT this evening. * IMPACTS...Travel will be difficult, especially for high profile vehicles and those pulling lightweight trailers. Gusty winds could blow down limbs, trees, and power lines. * ADDITIONAL DETAILS...Recreation on area lakes and reservoirs will be hazardous due to choppy conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Secure loose light weight items such as outdoor furniture to avoid them from being displaced by the strong winds. && $$ For more information from the National Weather Service visit http://weather.gov/greatfalls
387 WWUS75 KTFX 220143 NPWTFX URGENT - WEATHER MESSAGE National Weather Service Great Falls MT 743 PM MDT Thu May 21 2020 MTZ009-010-044-046-048-220245- /O.EXP.KTFX.HW.W.0006.000000T0000Z-200522T0200Z/ Northern Rocky Mountain Front-Eastern Glacier-Toole- Eastern Pondera-Southern Rocky Mountain Front- Including Logan Pass, Browning, Heart Butte, Cut Bank, Shelby, Sunburst, Brady, Conrad, Bynum, Choteau, and Augusta 743 PM MDT Thu May 21 2020 ...HIGH WIND WARNING WILL EXPIRE AT 8 PM MDT THIS EVENING... Winds have decreased to below high wind criteria this evening along the Rocky Mountain Front and east through Pondera, Glacier, and Toole Counties. Therefore, the High Wind Warning for that area will be allowed to expire. Westerly winds of 25 to 35 mph winds with gusts mostly to 45 mph will continue to decrease through midnight. $$ For more information from the National Weather Service visit http://weather.gov/greatfalls
What forecasters said that day
The local office's own words before this high wind warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Great Falls, MT wrote its last area forecast discussion before this high wind warning went out at May 20, 8:55 PM MDT, 46 minutes earlier.
Area forecast discussion, May 20, 8:55 PM MDT, 46 minutes before
Area Forecast Discussion National Weather Service Great Falls MT 855 PM MDT Wed May 20 2020 .UPDATE... 855 pm Update...Main update was to increase the chance for precipitation to mostly categorical over North Central Montana given current conditions and the short term models indicating that precipitation should fill in across the area overnight with the passing low pressure area. Have also increased pops to mostly likely in the southwest and kept categorical in the mountains for similar reasons. Precipitation should decrease Thursday morning as westerly downslope winds increase. Coulston 713 pm Update...Updated to cancel Severe Thunderstorm Watch for Judith Basin and Fergus Counties. Thunderstorms that passed through there have helped stabilize the airmass enough so that any additional thunderstorms should be fairly weak. However, the airmass over Blaine County has yet to modify, as showers have not moved in there quite yet, so will allow the Watch to continue there for the time being. Coulston && .SYNOPSIS... Isolated to scattered showers and thunderstorms are expected through this evening, with some shower activity persisting into the overnight hours. Some storms could become severe once again, especially east of a line from Havre to Lewistown. It will slowly turn cooler over the next few days, with the rain changing back to snow in the mountains. Overall, drier conditions are expected by Sunday, as temperatures return back to near normal. && .AVIATION... Updated 555 PM MDT Wed May 20 2020 (21/00Z TAF Period) Widespread low VFR/MVFR ceilings with areas of fog and rain/mountain snow showers will persist over the plains of North Central Montana through around 12Z. Scattered thunderstorms may also cause brief periods of IFR conditions southeast of a KGTF-KHVR line through around 03Z. Westerly downslope winds will then become quite strong and help break up the clouds there after 12Z. Gusty southerly winds will decrease over Southwest Montana through 06Z, but scattered showers will bring periods of MVFR conditions through around 15Z, then southerly winds will increase there after then. Coulston NOTE: Amendments not scheduled for Ennis (KEKS) due to ongoing runway closure. && .HYDROLOGY... Showers and some thunderstorms, some heavy at times will be possible over portions of the region through Thursday. Additional runoff from mountain snowmelt will only increase the potential for some isolated problems. Additionally, any brief heavy rainfall could cause some impacts in the burn area on the North Hills fire, on the north side of the Helena valley. No flood products are expected at this time but the situation will continue to be monitored. Brusda/RCG && .PREV DISCUSSION... /ISSUED 555 PM MDT Wed May 20 2020/ Remainder of this afternoon through Thursday...Upper level low centered over Idaho continues to bring isolated to scattered showers and thunderstorms to the region. Current mesoscale analysis indicates that the eastern portion of the CWA has the most conducive environment for strong to severe thunderstorms, with effective shear in the 40 to 60 kt range, and MUCAPE of 500 to 1000 j/kg. A stronger brand of storms should begin develop as the CIN continues to erode, mostly for areas southeast of a Havre to Great Falls line. The Storm Prediction Center has issued a Severe Thunderstorm Watch for Blaine, Judith Basin, and Fergus Counties, which is in effect until 11 PM tonight. Thunderstorm activity will decrease during the overnight hours but some showers will still be possible through the morning hours and some light snow is expected over the southwest mountains, generally above 6000 to 6500 ft in elevation. Drier conditions are expected for Thursday, although some showers and thunderstorms will linger over the southwest. Westerly winds will pick up over the plains and there is the potential for strong winds during the afternoon along the front range of the Rockies and in the Cut Bank area. Confidence was not high enough to upgrade the current watch to a warning but this will continue to be monitored in the near future. Brusda/RCG Friday through Sunday...It remains unsettled, especially over Southwest MT for Friday into Saturday. The main concern during this period is the accumulating snowfall potential in the higher elevations across Madison and Gallatin counties. Snow accumulations of 4 to 8 inches are possible for elevations generally above 6500 feet. We will continue to consider the potential for a winter highlight for this region. Otherwise, the chance for showers is lower across the remainder of the region, but below normal temperatures will be common across the area. Monday through Wednesday...Another upper level trof will swing through the region early next week. This will result in near normal temperatures, with a chance for showers continuing. Brusda && .PRELIMINARY POINT TEMPS/POPS... GTF 45 59 39 59 / 100 50 30 40 CTB 43 55 37 55 / 90 60 10 30 HLN 45 62 38 58 / 60 40 60 70 BZN 42 63 37 57 / 70 50 70 80 WYS 30 51 31 48 / 70 70 80 90 DLN 40 59 34 54 / 70 30 80 70 HVR 48 64 39 63 / 80 50 10 40 LWT 42 61 39 57 / 100 30 40 70 && .TFX WATCHES/WARNINGS/ADVISORIES... Severe Thunderstorm Watch for Blaine County until 1100 PM MDT tonight. High Wind Watch from Thursday morning through Thursday evening Eastern Glacier...Northern Rocky Mountain Front...Southern Rocky Mountain Front. && http://www.weather.gov/greatfalls
In the hours before
Local storm report, May 20, 7:30 PM MDT, 2 hours 11 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
730 PM MDT WED MAY 20 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1200 AM HAIL 2 N CLANCY 46.50N 111.98W
05/20/2020 E0.70 INCH JEFFERSON MT PUBLIC
A VERY STRONG THUNDERSTORM BROUGHT DIME
SIZED HAIL WHICH STRIPPED LEAVES OFF OF
TREES.
&&
SACLocal storm report, May 20, 7:33 PM MDT, 2 hours 8 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
733 PM MDT WED MAY 20 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0732 PM HEAVY RAIN 2 N CLANCY 46.49N 111.99W
05/20/2020 M0.83 INCH JEFFERSON MT PUBLIC
VERY HEAVY RAIN CAUSED CONSIDERABLE EROSION
OF DIRT ROADS IN SUBDIVISION.
&&
SACLocal storm report, May 20, 7:39 PM MDT, 2 hours 2 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE GREAT FALLS MT
739 PM MDT WED MAY 20 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0500 PM HEAVY RAIN 10 ESE CORBIN 46.35N 111.85W
05/20/2020 M2.20 INCH JEFFERSON MT MESONET
MESONET STATION TIBM8 10.2 SE CLANCY
(SNOTEL).
0600 PM HEAVY RAIN 12 SSE BOZEMAN 45.50N 110.97W
05/20/2020 M2.00 INCH GALLATIN MT MESONET
MESONET STATION LCKM8 12.5 SE BOZEMAN
(SNOTEL).
0700 AM HEAVY RAIN LEDGER 48.26N 111.82W
05/20/2020 M1.75 INCH PONDERA MT PUBLIC
CORRECTS PREVIOUS HEAVY RAIN REPORT FROM
LEDGER. 24 RAIN TOTAL FROM 7 AM TUESDAY THE
19TH THROUGH 7 AM WEDNESDAY THE 20TH.
0600 PM HEAVY RAIN 4 SSW WEST YELLOWSTONE 44.61N 111.15W
05/20/2020 M1.70 INCH GALLATIN MT MESONET
MESONET STATION WSKM8 4.3 SW WEST
YELLOWSTONE (SNOTEL).
0600 PM HEAVY RAIN 12 ENE GARNEILL 46.79N 109.51W
05/20/2020 M1.40 INCH FERGUS MT MESONET
MESONET STATION CRYM8 11.6 E GARNEILL
(SNOTEL).
0500 PM HEAVY RAIN 20 W AUGUSTA 47.45N 112.81W
05/20/2020 M1.30 INCH LEWIS AND CLARK MT MESONET
MESONET STATION WODM8 20.0 W AUGUSTA
(SNOTEL).
0800 AM HEAVY RAIN AUGUSTA 47.49N 112.40W
05/20/2020 M1.26 INCH LEWIS AND CLARK MT CO-OP OBSERVER
CO-OP OBSERVER STATION AUGM8 AUGUSTA -
FISHER PORTER.
0630 PM HEAVY RAIN 5 NE CRAIG 47.13N 111.90W
05/20/2020 M1.12 INCH LEWIS AND CLARK MT MESONET
MESONET STATION DBOM8 DEARBORN RAWS.
0600 PM HEAVY RAIN 16 SSW JACKSON 45.17N 113.58W
05/20/2020 M1.10 INCH BEAVERHEAD MT MESONET
MESONET STATION DHLM8 9.1 NE BAKER (SNOTEL).
0600 PM HEAVY RAIN 7 NW WICKES 46.44N 112.19W
05/20/2020 M1.10 INCH JEFFERSON MT MESONET
MESONET STATION FRHM8 7.3 NW WICKES
(SNOTEL).
0700 AM HEAVY RAIN 4 ESE FORT SHAW 47.48N 111.74W
05/20/2020 M1.10 INCH CASCADE MT CO-OP OBSERVER
CO-OP OBSERVER STATION SNRM8 SUN RIVER 4S
COOP.
0658 PM HEAVY RAIN 14 SW SIMMS 47.33N 112.10W
05/20/2020 M1.07 INCH LEWIS AND CLARK MT AWOS
AWOS STATION K1GM GOLF.
0647 PM HEAVY RAIN 3 WSW HELENA 46.58N 112.08W
05/20/2020 M1.04 INCH LEWIS AND CLARK MT MESONET
MESONET STATION TS911 HELENA 3SW RAWS -
PORTABLE.
0716 PM HEAVY RAIN 1 SE WISE RIVER 45.78N 112.93W
05/20/2020 M1.02 INCH BEAVERHEAD MT MESONET
MESONET STATION WRSM8 WISE RIVER RAWS.
0600 PM HEAVY RAIN 17 W WHITE SULPHUR SPRI 46.58N 111.27W
05/20/2020 M1.00 INCH MEAGHER MT MESONET
MESONET STATION PCKM8 21.6 NE TOWNSEND
(SNOTEL).
0445 PM HEAVY RAIN 7 W BUFFALO 46.82N 109.98W
05/20/2020 E1.00 INCH JUDITH BASIN MT PUBLIC
RAINFALL REPORTED VIA TWITTER. DURATION IS
ESTIMATED BASED UPON RADAR.
0700 AM HEAVY RAIN 5 NNE FAIRFIELD 47.68N 111.94W
05/20/2020 M1.00 INCH TETON MT COCORAHS
COCORAHS STATION MT-TN-6 FAIRFIELD 5.0 NNE.
0700 AM HEAVY RAIN 3 ENE DUTTON 47.86N 111.65W
05/20/2020 M0.98 INCH TETON MT COCORAHS
COCORAHS STATION MT-TN-3 3 ENE DUTTON
COCORAHS.
0658 PM HEAVY RAIN 7 ENE POWER 47.75N 111.55W
05/20/2020 M0.97 INCH TETON MT AWOS
AWOS STATION K1JM JULIE.
0900 AM HEAVY RAIN SHELBY 48.51N 111.86W
05/20/2020 M0.97 INCH TOOLE MT CO-OP OBSERVER
CO-OP OBSERVER STATION SLBM8 SHELBY COOP.
0730 PM HEAVY RAIN 2 WNW HELENA 46.61N 112.06W
05/20/2020 M0.95 INCH LEWIS AND CLARK MT MESONET
MESONET STATION FW7359 HELENA.
0500 PM HEAVY RAIN 3 ESE WOLF CREEK 46.99N 112.01W
05/20/2020 M0.95 INCH LEWIS AND CLARK MT CO-OP OBSERVER
CO-OP OBSERVER STATION HLTM8 HOLTER DAM
COOP.
0300 PM HEAVY RAIN SAINT MARY 48.74N 113.43W
05/20/2020 M0.94 INCH GLACIER MT MESONET
MESONET STATION MRYM8 SAINT MARY.
0719 PM HEAVY RAIN 1 ESE WISE RIVER 45.79N 112.94W
05/20/2020 M0.93 INCH BEAVERHEAD MT MESONET
MESONET STATION TR267 BEAVERHEAD DEERLODGE
NO. 1.
0653 PM HEAVY RAIN 2 E HELENA 46.60N 111.98W
05/20/2020 M0.90 INCH LEWIS AND CLARK MT ASOS
ASOS STATION KHLN HELENA AP ASOS.
0645 PM HEAVY RAIN SAINT MARY 48.74N 113.43W
05/20/2020 M0.90 INCH GLACIER MT MESONET
MESONET STATION STMQR SAINT MARY.
0500 PM HEAVY RAIN 8 W NEIHART 46.93N 110.90W
05/20/2020 M0.90 INCH MEAGHER MT MESONET
MESONET STATION STCM8 7.9 W NEIHART
(SNOTEL).
0711 PM HEAVY RAIN SAINT MARY 48.74N 113.43W
05/20/2020 M0.89 INCH GLACIER MT MESONET
MESONET STATION SRYM8 SAINT MARY RAWS.
0658 PM HEAVY RAIN 4 NE MOORE 47.02N 109.63W
05/20/2020 M0.88 INCH FERGUS MT AWOS
AWOS STATION K1MM MIKE.
0653 PM HEAVY RAIN 9 N HELENA 46.73N 112.02W
05/20/2020 M0.88 INCH LEWIS AND CLARK MT MESONET
MESONET STATION HRWM8 HELENA RAWS - 9 N
HELENA.
0700 AM HEAVY RAIN 6 NNW HELENA 46.68N 112.05W
05/20/2020 M0.87 INCH LEWIS AND CLARK MT COCORAHS
COCORAHS STATION MT-LC-20 HELENA 5.8 NNW.
0732 PM HEAVY RAIN 2 N CLANCY 46.49N 111.99W
05/20/2020 M0.83 INCH JEFFERSON MT PUBLIC
VERY HEAVY RAIN CAUSED CONSIDERABLE EROSION
OF DIRT ROADS IN SUBDIVISION.
0845 AM HEAVY RAIN 2 NNW HELENA 46.62N 112.04W
05/20/2020 M0.83 INCH LEWIS AND CLARK MT COCORAHS
COCORAHS STATION MT-LC-14 2 NW HELENA
COCORAHS.
0716 PM HEAVY RAIN 2 ESE SUN RIVER 47.52N 111.68W
05/20/2020 M0.82 INCH CASCADE MT MESONET
MESONET STATION EW9066 SUN RIVER.
0715 PM HEAVY RAIN 3 ENE WOLF CREEK 47.01N 112.01W
05/20/2020 M0.80 INCH LEWIS AND CLARK MT MESONET
MESONET STATION EW3831 WOLF CREEK.
0600 PM HEAVY RAIN 1 SW LAKEVIEW 44.59N 111.83W
05/20/2020 M0.80 INCH BEAVERHEAD MT MESONET
MESONET STATION LVRM8 1.0 SW LAKEVIEW
(SNOTEL).
0600 PM HEAVY RAIN 24 W BYNUM 47.92N 112.82W
05/20/2020 M0.80 INCH TETON MT MESONET
MESONET STATION MTKM8 25.8 S HEART BUTTE
(SNOTEL).
0600 PM HEAVY RAIN 6 N BASIN 46.36N 112.26W
05/20/2020 M0.80 INCH JEFFERSON MT MESONET
MESONET STATION RKPM8 5.9 N BASIN (SNOTEL).
0600 PM HEAVY RAIN 1 ESE WEST YELLOWSTONE 44.66N 111.09W
05/20/2020 M0.80 INCH GALLATIN MT MESONET
MESONET STATION WYSM8 0.8 E WEST YELLOWSTONE
(SNOTEL).
0500 PM HEAVY RAIN 18 W GRANT 44.99N 113.44W
05/20/2020 M0.80 INCH BEAVERHEAD MT MESONET
MESONET STATION LMHM8 10.1 E TENDOY
(SNOTEL).
0710 PM HEAVY RAIN 2 NNW HELENA 46.62N 112.04W
05/20/2020 M0.79 INCH LEWIS AND CLARK MT MESONET
MESONET STATION EW3848 HELENA.
0800 AM HEAVY RAIN 2 SSE MONTANA CITY 46.52N 111.92W
05/20/2020 M0.78 INCH JEFFERSON MT COCORAHS
COCORAHS STATION MT-JF-2 1 SE MONTANA CITY
COCORAHS.
0658 PM HEAVY RAIN 8 NNE AUGUSTA 47.60N 112.32W
05/20/2020 M0.77 INCH TETON MT AWOS
AWOS STATION K1FM FOXTROT.
0700 AM HEAVY RAIN ETHRIDGE 48.56N 112.13W
05/20/2020 M0.77 INCH TOOLE MT CO-OP OBSERVER
CO-OP OBSERVER STATION ETHM8 ETHRIDGE.
0700 AM HEAVY RAIN 9 NNE HELENA 46.73N 111.96W
05/20/2020 M0.77 INCH LEWIS AND CLARK MT COCORAHS
COCORAHS STATION MT-LC-11 9 NNE HELENA
COCORAHS.
0700 AM HEAVY RAIN 4 NNE POLARIS 45.42N 113.10W
05/20/2020 M0.76 INCH BEAVERHEAD MT COCORAHS
COCORAHS STATION MT-BV-18 3 NNE POLARIS
COCORAHS.
0721 PM HEAVY RAIN BROWNING 48.56N 113.01W
05/20/2020 M0.74 INCH GLACIER MT MESONET
MESONET STATION BGRM8 BROWNING RAWS.
0719 PM HEAVY RAIN 3 SW CUT BANK 48.60N 112.37W
05/20/2020 M0.74 INCH GLACIER MT ASOS
ASOS STATION KCTB CUT BANK AIRPORT.
0645 PM HEAVY RAIN 19 WNW AUGUSTA 47.60N 112.75W
05/20/2020 M0.74 INCH LEWIS AND CLARK MT MESONET
MESONET STATION GDMM8 GIBSON DAM DCP.
0632 PM HEAVY RAIN 18 SW HAYS 47.83N 109.01W
05/20/2020 M0.73 INCH BLAINE MT MESONET
MESONET STATION LBCM8 LITTLE BULLWHACKER
CREEK RAWS.
0708 PM HEAVY RAIN 24 W AUGUSTA 47.50N 112.90W
05/20/2020 M0.71 INCH LEWIS AND CLARK MT MESONET
MESONET STATION BEFM8 BENCHMARK RAWS.
0654 PM HEAVY RAIN 5 E WISDOM 45.60N 113.35W
05/20/2020 M0.71 INCH BEAVERHEAD MT MESONET
MESONET STATION SLCM8 STEELE CREEK RAWS.
0654 PM HEAVY RAIN 3 SW LEWISTOWN 47.03N 109.47W
05/20/2020 M0.70 INCH FERGUS MT ASOS
ASOS STATION KLWT LEWISTOWN ASOS.
0600 PM HEAVY RAIN 14 SW HEART BUTTE 48.13N 113.02W
05/20/2020 M0.70 INCH PONDERA MT MESONET
MESONET STATION BADM8 14.1 SW HEART BUTTE
(SNOTEL).
0600 PM HEAVY RAIN 15 SSW JACKSON 45.17N 113.50W
05/20/2020 M0.70 INCH BEAVERHEAD MT MESONET
MESONET STATION BLOM8 14.7 SW JACKSON
(SNOTEL).
0600 PM HEAVY RAIN 9 SE ROCKY BOY 48.17N 109.65W
05/20/2020 M0.70 INCH HILL MT MESONET
MESONET STATION ROCM8 8.6 SE ROCKY BOY
(SNOTEL).
0500 PM HEAVY RAIN 11 SE LINCOLN 46.84N 112.51W
05/20/2020 M0.70 INCH LEWIS AND CLARK MT MESONET
MESONET STATION NVRM8 11.3 SE LINCOLN
(SNOTEL).
0730 PM HEAVY RAIN 10 S CUT BANK 48.49N 112.37W
05/20/2020 M0.69 INCH GLACIER MT MESONET
MESONET STATION EW5772 CUT BANK.
0725 PM HEAVY RAIN 2 ENE CORBIN 46.39N 112.03W
05/20/2020 M0.68 INCH JEFFERSON MT MESONET
MESONET STATION DW6667 JEFFERSON CITY.
0600 PM HEAVY RAIN 1 NW CHOTEAU 47.82N 112.19W
05/20/2020 M0.68 INCH TETON MT CO-OP OBSERVER
CO-OP OBSERVER STATION COUM8 CHOTEAU 1 NW.
0658 PM HEAVY RAIN 2 NW WINDHAM 47.10N 110.17W
05/20/2020 M0.67 INCH JUDITH BASIN MT AWOS
AWOS STATION K1CM CHARLIE.
0700 AM HEAVY RAIN 2 E BUFFALO 46.82N 109.79W
05/20/2020 M0.67 INCH FERGUS MT COCORAHS
COCORAHS STATION MT-FG-3 1 E BUFFALO
COCORAHS.
0700 AM HEAVY RAIN LINCOLN 46.95N 112.68W
05/20/2020 M0.64 INCH LEWIS AND CLARK MT COCORAHS
COCORAHS STATION MT-LC-18 LINCOLN 0.2 SE.
0721 PM HEAVY RAIN 8 SE EAST GLACIER PARK 48.36N 113.11W
05/20/2020 M0.63 INCH GLACIER MT MESONET
MESONET STATION DCRM8 DEEP CREEK RAWS.
0705 PM HEAVY RAIN 7 S NEIHART 46.84N 110.72W
05/20/2020 M0.63 INCH MEAGHER MT MESONET
MESONET STATION PHYM8 PORPHORY PEAK RAWS.
0728 PM HEAVY RAIN 4 N EAST HELENA 46.64N 111.92W
05/20/2020 M0.62 INCH LEWIS AND CLARK MT MESONET
MESONET STATION EW5549 HELENA.
0652 PM HEAVY RAIN 7 ESE HILGER 47.22N 109.22W
05/20/2020 M0.62 INCH FERGUS MT MESONET
MESONET STATION JPKM8 JUDITH PEAK RAWS.
0728 PM HEAVY RAIN 2 N CLANCY 46.50N 111.98W
05/20/2020 M0.61 INCH JEFFERSON MT MESONET
MESONET STATION DW9972 CLANCY.
0715 PM HEAVY RAIN 3 E LOTHAIR 48.47N 111.18W
05/20/2020 M0.60 INCH LIBERTY MT MESONET
MESONET STATION EW8201 LOTHAIR 3E.
0647 PM HEAVY RAIN 4 SSE BASIN 46.22N 112.23W
05/20/2020 M0.60 INCH JEFFERSON MT MESONET
MESONET STATION GAAM8 GALENA RAWS.
0600 PM HEAVY RAIN 22 SW DELL 44.47N 112.98W
05/20/2020 M0.60 INCH BEAVERHEAD MT MESONET
MESONET STATION BEAM8 7.8 N NICHOLIA
(SNOTEL).
0600 PM HEAVY RAIN 18 NW LAKEVIEW 44.79N 112.06W
05/20/2020 M0.60 INCH MADISON MT MESONET
MESONET STATION DIVM8 18.1 NW LAKEVIEW
(SNOTEL).
0600 PM HEAVY RAIN 15 SW DUPUYER 48.06N 112.76W
05/20/2020 M0.60 INCH TETON MT MESONET
MESONET STATION DPYM8 16.1 S HEART BUTTE
(SNOTEL).
0600 PM HEAVY RAIN 8 ENE POLARIS 45.41N 112.96W
05/20/2020 M0.60 INCH BEAVERHEAD MT MESONET
MESONET STATION MULM8 8.2 E POLARIS
(SNOTEL).
0600 PM HEAVY RAIN 21 SW CAMERON 44.98N 111.95W
05/20/2020 M0.60 INCH MADISON MT MESONET
MESONET STATION SHCM8 22.3 S VIRGINIA CITY
(SNOTEL).
0630 AM HEAVY RAIN 4 SSE BYNUM 47.93N 112.29W
05/20/2020 M0.59 INCH TETON MT CO-OP OBSERVER
CO-OP OBSERVER STATION BYNM8 BYNUM 4 SSE.
0703 PM HEAVY RAIN 1 E LINCOLN 46.96N 112.65W
05/20/2020 M0.57 INCH LEWIS AND CLARK MT MESONET
MESONET STATION LNCM8 LINCOLN RAWS.
0715 PM HEAVY RAIN 13 SSE FORESTGROVE 46.83N 108.93W
05/20/2020 M0.55 INCH FERGUS MT AWOS
AWOS STATION KMVH N BAR RANCH AWOS.
0709 PM HEAVY RAIN 18 WSW BYNUM 47.87N 112.67W
05/20/2020 M0.55 INCH TETON MT MESONET
MESONET STATION GSNM8 GLEASON RAWS.
0800 AM HEAVY RAIN BOULDER 46.24N 112.11W
05/20/2020 M0.55 INCH JEFFERSON MT COCORAHS
COCORAHS STATION MT-JF-1 BOULDER 0.3 E
COCORAHS.
0615 PM HEAVY RAIN 2 WSW SUN PRAIRIE 47.53N 111.51W
05/20/2020 M0.54 INCH CASCADE MT MESONET
MESONET STATION VAUM8 1.6 W SUN PRAIRIE.
0800 AM HEAVY RAIN 14 E FERDIG 48.72N 111.48W
05/20/2020 M0.52 INCH TOOLE MT CO-OP OBSERVER
CO-OP OBSERVER STATION DVNM8 DUNKIRK 19NNE
COOP.
0600 AM HEAVY RAIN 10 N HELENA 46.75N 112.03W
05/20/2020 M0.52 INCH LEWIS AND CLARK MT COCORAHS
COCORAHS STATION MT-LC-4 10 N HELENA
COCORAHS.
0725 PM HEAVY RAIN KEVIN 48.74N 111.97W
05/20/2020 M0.51 INCH TOOLE MT MESONET
MESONET STATION DW0975 KEVIN.
0647 PM HEAVY RAIN 10 WSW GRANT 44.94N 113.25W
05/20/2020 M0.51 INCH BEAVERHEAD MT MESONET
MESONET STATION BRRM8 BRENNER RAWS.
0641 PM HEAVY RAIN 18 NNE ROY 47.59N 108.87W
05/20/2020 M0.50 INCH FERGUS MT MESONET
MESONET STATION ARMM8 ARMELLS CREEK RAWS.
0600 PM HEAVY RAIN 14 NE BELGRADE 45.89N 110.94W
05/20/2020 M0.50 INCH GALLATIN MT MESONET
MESONET STATION BRCM8 15.6 NE BOZEMAN
(SNOTEL).
0600 PM HEAVY RAIN 12 ENE CHECKERBOARD 46.67N 110.33W
05/20/2020 M0.50 INCH MEAGHER MT MESONET
MESONET STATION DAZM8 14.6 N MARTINSDALE
(SNOTEL).
0600 PM HEAVY RAIN 11 SSW EAST GLACIER PAR 48.30N 113.33W
05/20/2020 M0.50 INCH PONDERA MT MESONET
MESONET STATION PICM8 5.7 E BLACKTAIL -
RAILROAD ID (SNOTEL).
&&
RAINFALL TOTALS FROM THE LAST 24 HOURS OF 0.50 INCHES OR MORELocal storm report, May 20, 7:44 PM MDT, 1 hour 57 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE GREAT FALLS MT
744 PM MDT WED MAY 20 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0201 AM HAIL 1 E VAUGHN 47.56N 111.52W
05/20/2020 M1.00 INCH CASCADE MT PUBLIC
.
0152 AM HAIL 1 SW SUN PRAIRIE 47.53N 111.50W
05/20/2020 E1.00 INCH CASCADE MT PUBLIC
1 INCH HAIL REPORTED NEAR SUN PRAIRIE. MPING
REPORT.
1158 PM HAIL 1 SE MONTANA CITY 46.52N 111.91W
05/19/2020 E0.75 INCH JEFFERSON MT TRAINED SPOTTER
PENNY SIZE HAIL FALLING.
1200 AM HAIL 2 N CLANCY 46.50N 111.98W
05/20/2020 E0.70 INCH JEFFERSON MT PUBLIC
A VERY STRONG THUNDERSTORM BROUGHT DIME
SIZED HAIL WHICH STRIPPED LEAVES OFF OF
TREES.
0435 PM HAIL 7 W BUFFALO 46.82N 109.98W
05/20/2020 E0.50 INCH JUDITH BASIN MT PUBLIC
LOTS OF PEA SIZED TO HALF INCH DIAMETER HAIL
COVERING THE ROAD. HAIL SIZE ESTIMATED FROM
PHOTO ON TWITTER.
0434 PM HAIL HOBSON 47.00N 109.87W
05/20/2020 E0.25 INCH JUDITH BASIN MT TRAINED SPOTTER
BRIEF HEAVY RAIN.
0243 PM HAIL 11 ENE SQUARE BUTTE 47.59N 110.00W
05/20/2020 E0.25 INCH CHOUTEAU MT TRAINED SPOTTER
BRIEF HEAVY RAIN. NOT VERY MUCH HAIL.
0815 AM HAIL CUT BANK 48.64N 112.32W
05/20/2020 E0.25 INCH GLACIER MT TRAINED SPOTTER
.
0435 AM HAIL 7 NNE EAST HELENA 46.67N 111.84W
05/20/2020 E0.25 INCH LEWIS AND CLARK MT TRAINED SPOTTER
PEA SIZE HAIL FALLING NEAR HAUSER LAKE.
1130 PM HAIL 2 SE MONTANA CITY 46.52N 111.90W
05/19/2020 E0.25 INCH JEFFERSON MT TRAINED SPOTTER
COPIOUS AMOUNTS OF PEA-SIZED HAIL FELL OVER
MONTANA CITY, WHERE THERE ARE STILL DRIFTS
OF HAIL ON ROOFS AND THE GROUND FROM THE
OVERNIGHT STORM. REPORTED DAMAGE TO THE
DRIVEWAY AND THERE IS A VERIZON CELL TOWER
OUT OF SERVICE FROM DAMAGE.
&&
HAIL REPORTS FROM LAST NIGHT THROUGH THIS EVENING ACROSS NORTH CENTRAL
AND SOUTHWEST MONTANALocal storm report, May 20, 7:51 PM MDT, 1 hour 50 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE GREAT FALLS MT
751 PM MDT WED MAY 20 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1219 AM TSTM WND GST 8 SSW WOLF CREEK 46.89N 112.11W
05/20/2020 M51 MPH LEWIS AND CLARK MT MESONET
51 MPH WIND GUST AT THE DOT SENSOR NEAR
SIEBEN FLATS.
1228 AM TSTM WND GST 8 SSW WOLF CREEK 46.89N 112.11W
05/20/2020 M50 MPH LEWIS AND CLARK MT MESONET
MESONET STATION 301005 SIEBEN.
0652 PM TSTM WND GST 7 ESE HILGER 47.22N 109.22W
05/20/2020 M49 MPH FERGUS MT MESONET
MESONET STATION JPKM8 JUDITH PEAK RAWS.
0515 PM TSTM WND GST 13 SSE FORESTGROVE 46.83N 108.93W
05/20/2020 M43 MPH FERGUS MT AWOS
AWOS STATION KMVH N BAR RANCH AWOS.
0835 PM TSTM WND GST 3 SW LEWISTOWN 47.03N 109.47W
05/19/2020 M43 MPH FERGUS MT ASOS
ASOS STATION KLWT LEWISTOWN ASOS.
1154 PM TSTM WND GST 8 W TOWNSEND 46.31N 111.70W
05/19/2020 M41 MPH BROADWATER MT MESONET
MESONET STATION EKHM8 ELKHORN RAWS - 8 W
TOWNSEND.
0325 AM TSTM WND GST 7 ENE POWER 47.75N 111.55W
05/20/2020 M40 MPH TETON MT AWOS
AWOS STATION K1JM JULIE.
&&
THUNDERSTORM WIND GUSTS OF 40+ MPH FROM LAST NIGHT THROUGH THIS EVENING.Local storm report, May 20, 7:54 PM MDT, 1 hour 47 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE GREAT FALLS MT
754 PM MDT WED MAY 20 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0755 PM NON-TSTM WND GST 2 ESE TWIN BRIDGES 45.53N 112.30W
05/19/2020 M48 MPH MADISON MT MESONET
MESONET STATION K7S1 1.6 E TWIN BRIDGES
(GTFWFO).
0110 PM NON-TSTM WND GST 1 WNW WEST YELLOWSTONE 44.67N 111.12W
05/20/2020 M47 MPH GALLATIN MT AWOS
AWOS STATION KWYS W YELLOWSTONE AWOS.
0400 PM NON-TSTM WND GST 3 SW AMSTERDAM 45.73N 111.37W
05/20/2020 M46 MPH GALLATIN MT MESONET
MESONET STATION MTM07 3.2 SW AMSTERDAM
(MT-MESO).
0257 PM NON-TSTM WND GST 4 NNE MCALLISTER 45.50N 111.70W
05/20/2020 M45 MPH MADISON MT MESONET
MESONET STATION MTNOR NORRIS HILL (MT DOT).
0600 PM NON-TSTM WND GST 6 WSW BIG SKY 45.23N 111.45W
05/20/2020 M44 MPH MADISON MT MESONET
MESONET STATION YCTIM 6.3 W BIG SKY
(AVALANCHE).
0216 PM NON-TSTM WND GST 3 SSW ENNIS 45.30N 111.75W
05/20/2020 M44 MPH MADISON MT MESONET
MESONET STATION ENNM8 ENNIS RAWS.
0215 PM NON-TSTM WND GST 5 NNE CAMERON 45.27N 111.65W
05/20/2020 M44 MPH MADISON MT AWOS
AWOS STATION KEKS ENNIS BIG SKY AWOS.
0138 PM NON-TSTM WND GST 5 ENE DILLON 45.25N 112.55W
05/20/2020 M44 MPH BEAVERHEAD MT ASOS
ASOS STATION KDLN DILLON.
0945 PM NON-TSTM WND GST 1 WNW WEST YELLOWSTONE 44.67N 111.12W
05/19/2020 M44 MPH GALLATIN MT AWOS
AWOS STATION KWYS W YELLOWSTONE AWOS.
0345 PM NON-TSTM WND GST 2 N AMSTERDAM 45.79N 111.32W
05/20/2020 M42 MPH GALLATIN MT MESONET
MESONET STATION MTM71 2.0 N AMSTERDAM
(MT-MESO).
0100 PM NON-TSTM WND GST 7 N DELL 44.81N 112.72W
05/20/2020 M41 MPH BEAVERHEAD MT MESONET
MESONET STATION MTM16 6.6 N DELL (MT-MESO).
0315 PM NON-TSTM WND GST 1 W WHITEHALL 45.87N 112.11W
05/20/2020 M40 MPH JEFFERSON MT MESONET
MESONET STATION WHHM8 WHITEHALL RAWS.
0300 PM NON-TSTM WND GST 5 NNE WATERLOO 45.80N 112.17W
05/20/2020 M40 MPH JEFFERSON MT MESONET
MESONET STATION JVWM 5.4 N WATERLOO
(AGRIMET).
0145 PM NON-TSTM WND GST 8 NE BANNACK 45.25N 112.88W
05/20/2020 M40 MPH BEAVERHEAD MT MESONET
MESONET STATION MTM14 8.3 NE BANNACK
(MT-MESO).
0943 PM NON-TSTM WND GST 8 SSW WOLF CREEK 46.89N 112.11W
05/19/2020 M40 MPH LEWIS AND CLARK MT MESONET
MESONET STATION 301005 SIEBEN.
&&
NON-THUNDERSTORM WIND GUSTS OF 40+ MPH FROM LAST NIGHT THROUGH THIS
EVENING ACROSS NORTH CENTRAL AND SOUTHWEST MONTANAThe office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 9:35 PM MDT | Areal Flood Advisory | TFX | Cascade, Lewis and Clark | 35 hr |
| May 20, 10:35 PM MDT | Special Weather Statement | TFX | Blaine | 40 min |
| May 21, 1:41 AM MDT | Winter Weather Advisory | TFX | 27 hr | |
| May 21, 9:14 AM MDT | Areal Flood Advisory | TFX | Lewis and Clark | 23 hr |
| May 21, 9:41 AM MDT | Areal Flood Advisory | TFX | Lewis and Clark | 23 hr |
Nearby
High Wind Warnings in Montana, 2020Every high wind warning in 2020
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.