Severe Thunderstorm Watch — Lewis and Clark County, Montana
Conditions favor the development of severe thunderstorms in and near the watch area.
Current Status
⛈️ Active: Severe Thunderstorm Watch
Severe Thunderstorm Watch issued August 27 at 7:42PM MDT until August 27 at 10:00PM MDT by NWS Great Falls MT
SEVERE THUNDERSTORM WATCH 634 REMAINS VALID UNTIL 10 PM MDT THIS EVENING FOR THE FOLLOWING AREAS IN MONTANA THIS WATCH INCLUDES 15 COUNTIES IN CENTRAL MONTANA CASCADE FERGUS JUDITH BASIN MEAGHER IN NORTH CENTRAL MONTANA BLAINE CHOUTEAU HILL LIBERTY TOOLE IN SOUTHWEST MONTANA BEAVERHEAD BROADWATER GALLATIN JEFFERSON MADISON IN WEST CENTRAL MONTANA LEWIS AND CLARK THIS INCLUDES THE CITIES OF AUGUSTA, BATTLE RIDGE PASS, BELT, BIG HOLE PASS, BIG SANDY, BOULDER, BOULDER HILL, BOZEMAN APT, BOZEMAN PASS, CARTER, CASCADE, CHESTER, CHIEF JOSEPH PASS, CHINOOK, CITY OF BOZEMAN, DEEP CREEK PASS, DILLON, ELK PARK PASS, ENNIS, FLESHER PASS, FORT BENTON, GRASS RANGE, GREAT FALLS, HARLEM, HAVRE, HAYS, HELENA, HOBSON, HOMESTAKE PASS, KINGS HILL PASS, LEWISTOWN, LEWISTOWN DIVIDE, LINCOLN, MACDONALD PASS, MARTINSDALE, MONIDA PASS, MONTANA CITY, NORRIS HILL, RAYNESFORD, RAYNOLDS PASS, ROCKY B
Effective August 27, 2026 at 9:42 PM ET · Expires August 28, 2026 at 12:00 AM ET
Event Details
Event Type
Severe Thunderstorm Watch
Severity
severe
Issued By
NWS Great Falls MT
Expires
August 28, 2026 at 12:00 AM ET
Last Checked
1 hour ago
Also In Effect For
This same Severe Thunderstorm Watch also covers:
Other Active Alerts in Montana
Severe Thunderstorm Watch
Severe Thunderstorm Watch
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Severe Thunderstorm Watch
Severe Thunderstorm Watch
Get Severe Thunderstorm Watch Alerts for Lewis and Clark County
StormCast checks the NWS feed continuously and pushes alerts like this directly to your phone — even with the screen off.
Frequently Asked Questions
What does a Severe Thunderstorm Watch mean for Lewis and Clark County, Montana?
Conditions favor the development of severe thunderstorms in and near the watch area.
Is this Severe Thunderstorm Watch currently active?
Yes — this alert is active as of our last check (1 hour ago). It's set to expire August 28, 2026 at 12:00 AM ET.
How do I get notified about Severe Thunderstorm Watch alerts for Lewis and Clark County?
Download StormCast free on Google Play and set Lewis and Clark County, Montana as one of your monitored locations. StormCast checks the NWS feed continuously and pushes alerts like this directly to your phone — even with the screen off.
What other areas does this alert cover?
This same Severe Thunderstorm Watch is also in effect for Gallatin County, Judith Basin County, Toole County, Madison County, Chouteau County, Fergus County, Beaverhead County, Blaine County, Cascade County, Liberty County, Meagher County, Jefferson County, Hill County.