1 tornado, as filed by the National Weather Service.
Every event with a place to put it. Tap one for its entry below.
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.
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 Great Falls, MT wrote its last area forecast discussion before the first event at Apr 25, 1:30 PM MST, 40 minutes earlier.
SOUTHWEST AND NORTH CENTRAL MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREAT FALLS MT
230 PM MDT FRI APR 25 2003
.SHORT TERM...TONIGHT AN UPPER LEVEL DISTURBANCE WILL MOVE NORTH
FROM SOUTHWEST TO NORTH CENTRAL MONTANA. THIS WILL ALLOW FOR A BAND
OF PRECIPITATION TO MOVE NORTH ACROSS THE AREA. SOME AREAS MAY SEE
UP TO A QUARTER OF AN INCH OF PRECIP AS IT MOVES THROUGH. THE PRECIP
WILL COME TO AN END AFTER MIDNIGHT...BUT THEN REDEVELOP TOWARDS DAY
BREAK OVER THE SOUTHWEST. EXPECT SNOW LEVELS TO LOWER TO 5000 FEET
OVER THE SOUTWEST...AS MUCH COOLER AIR MOVES IN. FOR SATURDAY...
RAIN AND MOUNTAIN SNOW WILL BE LIKELY ACROSS MUCH OF THE REGION...AS
AN UPPER LEVEL DISTURBANCE MOVES EAST ACROSS THE CWA. TEMPERATURES
WILL BE ABOUT 10 DEGREES COOLER THAN TODAY AS WELL. BRUSDA
ON SUNDAY THE SURFACE LOW TO THE NORTH OF CWA
CONTINUES TO PULL OFF TO THE EAST AS A SURFACE HIGH BUILDS IN
OVER THE SW. UPPER RIDGE BUILDS OVER CWA SO WILL DROP POPS OVER
MUCH OF THE AREA FOR EARLY SUNDAY AND SUNDAY AFTERNOON. EXPECT SW TO
S FLOW ALOFT TO START SO WENT WITH CHANCE OF SHOWERS SUNDAY
NIGHT. ATMOSPHERE BECOMES UNSTABLE IN SW FLOW ALOFT AND EXPECT
MORE SCATTERED SHOWERS/THUNDERSTORMS. TIMING AGAIN WILL BE THE
PROBLEM. LOOKS LIKE GFS CONTINUES TO BE THE FASTER OF THE MODELS SO
LEFT POPS IN GOING FORECAST AS WAS. LATEST GFS TEMPERATURES CONTINUE
TO BE COOLER THAN GRIDS. AM NOT BUYING INTO THEM AS YET. ANY SUN
DURING BREAKS IN THE CLOUDS WILL GET TEMPS INTO THE 50S QUITE EASILY.
OVERALL TREND IS FOR CLOUDINESS AND COOLER WITH SCATTERED SHOWERS.
CAMP
.EXTENDED...FOR THURSDAY AND FRIDAY...EXPECT SCATTERED SHOWERS AND
THUNDERSTORMS TO CONTINUE...AS AN UPPER LEVEL LOW MOVES INTO
SOUTHERN IDAHO. THE HIGHEST CHANCES WILL BE IN THE SOUTWEST...WITH
THE LOWEST CHANCES NEAR THE CANADIAN BORDER. EXPECT TEMPERATURES TO
BE NEAR TO SLIGHTLY BELOW NORMAL ON THURSDAY AND FRIDAY. BRUSDA
.CCF NUMBERS
GTF TW 035/051 033/056 030 17863
BEEEE 053/034 056/034 058/033 056/036 059 22223333333
CTB TW 033/049 030/053 028 17663
BEEEE 050/030 053/032 055/031 053/034 056 21113333333
HLN TW 035/051 034/055 031 17863
EEEEE 056/036 059/036 059/035 057/038 060 23333333333
BZN TW 036/052 033/056 028 17863
EEEEE 054/033 058/033 058/032 056/035 059 23333333333
WEY WO 026/039 022/043 018 17963
EEEEE 045/025 048/025 048/024 046/027 049 24443344444
DLN WO 038/047 030/053 027 17963
EEEEE 051/032 054/032 054/031 052/032 055 23333333333
HVR TW 037/054 032/052 030 17865
BBEEE 055/030 061/032 062/031 060/034 062 21112222222
LWT TW 036/052 032/053 028 17863
BEEEE 051/032 056/034 058/033 056/034 059 22223333333
.TFX...NONE.MTZ008>015-044>055-260010- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREAT FALLS MT 645 AM MDT FRI APR 25 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL AND SOUTHWEST MONTANA .DAY ONE...TODAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. NO WATCHES, WARNINGS, OR ADVISORIES CURRENTLY IN EFFECT .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The Billings radar (KBLX), 166 km away, was scanning. The volume nearest the first event began at 21:08 UTC.
1 tornado. Local standard time, as filed.
A strong thunderstorm moving through Fergus County during the mid afternoon hours on the 25th, produced a tornado 15 miles North of Roy. The tornado began at 1410 MST and was on the ground for 7 minutes. No damage was reported with this tornado.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Montana in 2003Every state in 2003This day in weather historyThe tornado archive for Montana, 2003Warnings in Montana, April 2003
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: 5348204.