Deep low surface pressure moving across southern Canada produced high winds along the Northern Rocky Mountain Front.
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 episode as NWS TFX wrote it up.
Deep low surface pressure moving across southern Canada produced high winds along the Northern Rocky Mountain Front.
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 Mar 21, 7:46 PM MST, 2 hours 14 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREAT FALLS MT 846 PM MDT WED MAR 21 2007 .UPDATE... TONIGHT...UPDATE TO ZONES NOT PLANNED...AN UPPER LEVEL LOW PRESSURE TROF CONTINUES TO MOVE TO THE EAST WHILE WEAK HIGH PRESSURE BUILDS OVER THE ZONES. COOLING UNDERNEATH FAIRLY CLEAR SKIES AND A DRY AIRMASS WILL BE MODERATED BY BREEZY CONDITIONS WHICH WILL CONTINUE THROUGH THE NIGHT. CURRENT FORECAST LOOKS GOOD. ZELZER && .PREV DISCUSSION... (ISSUED 538 PM MDT WED MAR 21 2007) DISCUSSION... TONIGHT THROUGH FRIDAY...UPPER TROF HAS PUSHED EAST OF THE COUNTY WARNING AREA LEAVING BEHIND A GENERALLY DRY AND COOLER AIRMASS. A LEE SIDE SURFACE TROF DEVELOPS AGAIN TONIGHT AND WILL PROVIDE BREEZY CONDITIONS. THE STRONGEST WIND GUSTS WILL BE ALONG THE NORTHERN ROCKY MOUNTAIN FRONT AND ADJACENT PLAINS WHERE THE GRADIENT WILL BE THE TIGHTEST. AT THIS POINT IN TIME...IT APPEARS WIND SPEEDS SHOULD REMAIN BELOW WARNING CRITERIA AND NO HIGHLIGHTS WILL BE NECESSARY. NORTHWEST FLOW ALOFT THURSDAY WILL BRING SOME PRECIPITATION TO THE WESTERN AND SOUTHWEST MOUNTAINS. A WEAK DISTURBANCE IN THE FLOW ALOFT THURSDAY NIGHT WILL SPREAD A SLIGHT CHANCE OF SHOWERS ACROSS THE CENTRAL AND SOUTHERN PORTIONS OF THE COUNTY WARNING AREA. WEAK RIDGING ON FRIDAY WILL ALLOW DRY CONDITIONS TO RETURN. TEMPERATURES WILL CONTINUE ABOVE SEASONAL AVERAGES. EMANUEL FRIDAY NIGHT THROUGH WEDNESDAY...MODELS ARE COMING INTO BETTER AGREEMENT FOR THIS WEEKEND THROUGH EARLY NEXT WEEK...FEATURING MILD WESTERLY FLOW AT THE START OF THE PERIOD WITH A BROAD UPPER LEVEL TROUGH COMING ONSHORE SUNDAY INTO MONDAY. MODELS ARE ESPECIALLY COMING INTO BETTER AGREEMENT AT THE LARGE SCALE...DEPICTING A SIGNIFICANT SPRINGLIKE STORM SYSTEM TO IMPACT THE WESTERN U.S. EARLY NEXT WEEK. DRY AND WARM BUT WINDY CONDITIONS ARE EXPECTED SATURDAY UNDER WEST TO SW FLOW ALOFT. A PACIFIC COLD FRONT MOVES ACROSS THE AREA SUNDAY FOR SLIGHTLY COOLER...BUT STILL ABOVE AVERAGE TEMPERATURES AND A CHANCE OF PRECIPITATION MAINLY ALONG THE CONTINENTAL DIVIDE AND OVER SW MT. MODELS ARE BEGINNING TO CONVERGE ON A SOLUTION FEATURING A DEEP PACIFIC TROUGH MOVING ACROSS THE INTERMOUNTAIN WEST MONDAY NIGHT THROUGH WEDNESDAY. HOWEVER MAJOR DIFFERENCES CONTINUE WITH REGARD TO THE TIMING STRENGTH AND TRACK OF THE SYSTEM AS IT APPROACHES THE REGION. HAVE INCREASED POPS SOME BUT NO HIGHER THAN CHANCE TO ACCOUNT FOR THIS. REGARDLESS OF MODEL SOLUTION IT APPEARS NEXT WEEK WILL BE COOLER THAN RECENTLY WITH MUCH MORE ACTIVE WEATHER IN STORE FOR THE REGION. HOENISCH AVIATION... UPDATED 2338Z. HIGH PRESSURE WILL AFFECT REGIONAL ROUTES AND TERMINALS DURING THE NEXT 24 HOURS. DRY WESTERLY FLOW ALOFT AND AT THE MID LEVELS WILL CONTRIBUTE TO PREVAILING VFR CONDITIONS THROUGHOUT THE REGION. CLOUD COVER WILL BE ON THE INCREASE THRU 06Z...HOWEVER CEILINGS WILL BE 12KFT OR GREATER THRU TOMORROW. SURFACE WIND GUSTS OF UP TO 35KT FROM THE SOUTHWEST ARE EXPECTED ACROSS THE NORTH CENTRAL PLAINS OF MONTANA THRU 06Z...PARTICULARLY NEAR KCTB...DECREASING TO 25KT OR LESS THRU 15Z. ZUMPFE && .PRELIMINARY POINT TEMPS/POPS... GTF 27 57 35 60 / 0 0 20 0 CTB 25 52 32 56 / 0 0 10 0 HLN 28 56 33 61 / 0 10 20 10 BZN 24 56 31 58 / 0 0 20 10 WEY 21 44 23 48 / 0 10 30 30 DLN 26 55 33 59 / 0 10 20 10 HVR 28 58 31 61 / 0 0 10 0 LWT 28 55 32 60 / 0 0 10 0 && .TFX WATCHES/WARNINGS/ADVISORIES... NONE. && WEATHER.GOV/GREATFALLS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREAT FALLS MT 500 AM MDT WED MAR 21 2007 MTZ008>015-044>055-221100- BEAVERHEAD-NORTHERN ROCKY MOUNTAIN FRONT-EASTERN GLACIER-HILL- CASCADE-CHOUTEAU-CENTRAL AND SOUTHERN LEWIS AND CLARK-MADISON- TOOLE-LIBERTY-EASTERN PONDERA-BLAINE- SOUTHERN ROCKY MOUNTAIN FRONT-EASTERN TETON-JUDITH BASIN-FERGUS- JEFFERSON-BROADWATER-MEAGHER-GALLATIN- 500 AM MDT WED MAR 21 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL MONTANA...NORTH CENTRAL MONTANA AND SOUTHWEST MONTANA. .DAY ONE...TODAY AND TONIGHT THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY 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.
2 high wind. Local standard time, as filed.
A gust to 65 mph was reported at the Two Medicine DOT site.
Sustained winds of 41 mph were reported at the Cut Bank ASOS site.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Montana in 2007Every state in 2007This day in weather historyWarnings in Montana, March 2007
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: 15442, 15443.