Isolated severe weather occurred during the afternoon and evening hours across a portion of northeast Montana.
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 episode as NWS GGW wrote it up.
Isolated severe weather occurred during the afternoon and evening hours across a portion of northeast Montana.
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 1, 1:13 PM MST, 2 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GLASGOW MT 213 PM MDT SUN JUL 1 2007 .SHORT TERM...FOR NORTHEAST MONTANA...TONIGHT THROUGH TUESDAY... THROUGH MONDAY THE AREA WILL REMAIN IN AN UNSETTLED SOUTHWEST FLOW ALOFT. AS AN UPPER RIDGE BEGINS TO RETROGRADE THE UPPER FLOW BECOMES MORE NORTHWEST BY TUESDAY ALLOWING IT TO BECOME MORE STABLE AND DRY OUT. TEMPERATURES WILL BE ABOVE AVERAGE EARLY THIS WEEK. TONIGHT...A SURFACE LOW IS SITTING ACROSS WESTERN SD WITH AN INVERTED SURFACE TROUGH EXTENDING NORTH THROUGH WESTERN ND. POTENTIAL STILL THERE FOR A ROUND OF SEVERE WEATHER THIS EVENING. ELEVATED CONVECTION WHICH MOVED INTO THE AREA OVERNIGHT INTO THIS MORNING CONTINUES TO PERSIST IN A NARROW BROKEN BAND FROM NEAR LEWISTOWN TO PLENTYWOOD THIS AFTERNOON. THIS CONVECTION WILL LEAVE AROUND OUTFLOW BOUNDARIES. STRONG DAYTIME HEATING THIS AFTERNOON WILL CONTINUE TO DESTABILIZE THE ATMOSPHERE WITH THE LIFTED INDEX PROGGED TO DROP TO AROUND -5C AND SBCAPE VALUES AROUND 1500J/KG. THE 0-6KM SHEAR IS ON THE ORDER OF 40 KTS. INITIALLY THE GREATEST THREAT IS LIKELY TO BE LARGE HAIL...BUT AS CONVECTION LIKELY DEVELOPS INTO AN MCS IN EXTREME EASTERN MONTANA OR WESTERN NORTH DAKOTA LATER THIS EVENING THE BIGGER THREAT MAY TURN TO DAMAGING WIND GUSTS. THE SPECIAL 18Z KGGW SOUNDING HAD A STRONG LOW LEVEL INVERSION DUE TO CLOUDS AND PERSISTENT SHOWERS IN THE AREA THIS MORNING...BUT LOOKED PRETTY FAVORABLE FOR SEVERE WEATHER ABOVE THE INVERSION. MODIFYING THE SOUNDING FOR SURFACE TEMPERATURES IN THE MID 80S (CONVECTIVE TEMPERATURE) WOULD GIVE US ABOUT 2200J/KG OF CAPE AND A -6C LI. NOT SURE THAT THIS IS GOING TO HAPPEN THOU AS SHOWERS KEEP DEVELOPING JUST TO THE SOUTHWEST OF THE CWA AND CONTINUE TO TRACK TO THE NORTHEAST. RIGHT NOW WOULD TEND TO FAVOR AREAS SOUTH OF THE MISSOURI RIVER AS HAVING THE HIGHEST THREAT OF SEVERE WEATHER...WITH OUTFLOW BOUNDARIES FROM THE CONVECTION TO THE NORTH AND MORE SOLAR HEATING OWING THE LESS CLOUD COVER. MONDAY...THE UPPER FLOW REMAINS OUT OF THE SOUTHWEST AS AN UPPER RIDGE REMAINS IN PLACE NEAR THE 4-CORNERS REGION AND AN UPPER TROUGH REMAINS WELL OFF THE BC COAST. THE SURFACE FEATURES EITHER RETROGRADE OR RE-FORM WITH A SURFACE TROUGH ACROSS EASTERN MONTANA. THIS MAY SET UP ANOTHER ROUND OF THUNDERSTORMS DURING THE AFTERNOON AND EVENING AND THE POTENTIAL FOR SEVERE WEATHER AGAIN. THE AXIS OF GREATEST INSTABILITY LOOKS TO BE FROM ABOUT THE BLACK HILLS UP INTO OUR SOUTHEAST ZONES DURING THE AFTERNOON AND EVENING. WILL MAKE MENTION OF SEVERE DURING THE AFTERNOON AND EVENING ACROSS THE SOUTHEAST ZONES. MON NIGHT & TUESDAY...GFS AND WRF HINT THAT AN MCS DEVELOPS ACROSS SOUTHERN SASKATCHEWAN MONDAY EVENING AND DROPS SOUTHEAST INTO WESTERN NORTH DAKOTA OVERNIGHT. THERE MAY STILL BE SOME SEVERE THREAT DURING THE EVENING IN THE EASTERN ZONES...BUT IT SHOULD COME TO AN END BY MIDNIGHT. SHOULD AN MCS FORM THERE SHOULD BE SOME SUBSIDENCE IN IT/S WAKE WITH SOME DRIER AIR TO WORK INTO THE WESTERN ZONES OVERNIGHT. BY TUESDAY THE UPPER RIDGE REFORMS WITH THE RIDGE AXIS TO THE WEST OF THE LOCAL AREA AND A WEST/NORTHWEST FLOW ALOFT. THIS SHOULD MAKE FOR A DRIER DAY...WITH PERHAPS ENOUGH INSTABILITY FOR AN ISOLATED SHOWER OR THUNDERSTORM ACROSS ONLY THE SOUTHEAST ZONES. HEIGHTS AND THICKNESS VALUES QUITE HIGH AND TEMPERATURES WILL BE WELL ABOVE AVERAGE...BUT CERTAINLY NOT AS HOT AS IT WILL LIKELY BE LATE IN THE WEEK...BUT MORE ON THAT IN THE EXTENDED DISCUSSION THAT FOLLOWS. CB .LONG TERM...TUESDAY NIGHT THROUGH SUNDAY... UPDATE...UPPER RIDGE DOMINATES OVER MONTANA FOR MOST OF THE WEEK. THE CURRENT HOT AND DRY FORECAST LOOKS REASONABLE AT THIS POINT. THE MAIN QUESTION MARK IN THE FORECAST IS WHEN WILL THE RIDGE BREAK DOWN. THE MODELS HAVE THE RIDGE FLATTENING NEXT WEEKEND AND BRINGING A COLD FRONT THROUGH THE FORECAST AREA. THE MODELS CURRENTLY TIME THIS FRONT FOR SATURDAY BUT THERE HAS BEEN SOME RUN TO RUN VARIATIONS WITH THIS FRONT. WILL KEEP SATURDAY HOT AND SUNDAY COOLER FOR NOW. FORRESTER PREVIOUS LONG TERM...THE PATTERN TAKES ON A VERY MID-SUMMER LOOK...WHICH IS GENERALLY HOT AND DRY. MODELS ARE IN GOOD AGREEMENT WITH A LARGE AND STRENGTHENING CLOSED UPPER HIGH OVER THE WESTERN AND PLAINS STATES. THIS RIDGES NORTH INTO MONTANA WITH 500 MB HEIGHTS EXCEEDING 590 DM THU AND FRI. THICKNESSES CLIMB TO THE 580S DM FRI AND SAT. THESE 2 FACTORS LONG USUALLY MEAN THERE WILL BE SOME LOCATIONS REACH 100. HAVE RAISED HIGHS ABOVE MOS FRI AND SAT. THE RIDGE WEAKENS A BIT INTO A FLAT WESTERLY FLOW OVER THE WEEKEND. THIS IS LIKELY TO DRIVE A COOL FRONT FROM THE NW THRU HERE SAT NIGHT OR SUN. UPPER SUPPORT INITIALLY LOOKS WEAK...SO EXPECT CONVECTION TO BE VERY ISOLATED...SO WILL KEEP POPS VERY LOW. MODELS VARY SOME ON TIMING OF THE FRONT TOO. SIMONSEN && .AVIATION... SCATTERED TO BROKEN LAYERS CLOUDS WITH BASES AT OR ABOVE 6K FT AGL WILL PREVAIL EXCEPT NEAR THUNDERSTORMS THROUGH SUNSET. LOOK FOR SCATTERED THUNDERSTORMS THROUGH THIS EVENING THAT MAY BRING BRIEF PERIODS OF MVFR CEILINGS AND VISIBILITY ALONG WITH ERRATIC GUSTY WINDS. EXPECT ISOLATED SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT TONIGHT WITH SCATTERED MID LEVEL OR HIGHER CLOUDS. MORE THUNDERSTORMS ARE POSSIBLE DURING THE DAY ON MONDAY WITH A MIX OF MID AND HIGH LEVEL CLOUDS. GFF && .CLIMATE... THE JUNE WEATHER SUMMARY IS NOW AVAILABLE FOR GLASGOW. PLEASE SEE GTFCLMGGW OR CXUS55 KGGW FOR MORE DETAILS. THE SUMMARY IS ALSO AVAILABLE ON THE CLIMATE SECTION OF OUR WEB PAGE AT: HTTP://WWW.WEATHER.GOV/GLASGOW CB && .GLASGOW WATCHES/WARNINGS/ADVISORIES...NONE. && WEATHER.GOV/GLASGOW
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GLASGOW MT 825 AM MDT SUN JUL 1 2007 MTZ016>027-059>062-021200- CENTRAL AND SOUTHEAST PHILLIPS-CENTRAL AND SOUTHERN VALLEY- DANIELS-SHERIDAN-WESTERN ROOSEVELT-PETROLEUM-GARFIELD-MCCONE- RICHLAND-DAWSON-PRAIRIE-WIBAUX-NORTHERN PHILLIPS- SOUTHWEST PHILLIPS-NORTHERN VALLEY-EASTERN ROOSEVELT- 825 AM MDT SUN JUL 1 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST MONTANA. .DAY ONE...TODAY AND TONIGHT LOOK FOR ISOLATED THUNDERSTORMS OVER NORTHEAST MONTANA THIS MORNING. THE THUNDERSTORMS WILL BECOME SCATTERED ACROSS THE AREA THIS AFTERNOON AND EVENING. SOME STORMS THIS AFTERNOON AND EVENING WILL BECOME SEVERE WITH LARGE HAIL AND DAMAGING WINDS POSSIBLE. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THERE IS A CHANCE FOR THUNDERSTORMS ON MONDAY...MAINLY ALONG AND SOUTH OF THE YELLOWSTONE RIVER. IF ANY THUNDERSTORMS DEVELOP ON MONDAY...THE STORMS MAY BECOME SEVERE WITH LARGE HAIL BEING THE MAIN THREAT. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The Glasgow radar (KGGW), 169 km away, was scanning. The volume nearest the first event began at 20:13 UTC.
11 hail, 1 thunderstorm wind. Local standard time, as filed.
The hail covered the ground and lasted about 10 minutes. The size of the hail ranged from pea to quarter. Estimated that one inch of rain fell in 20 minutes.
The hail covered the ground and was accompanied by heavy rain.
The hail ranged in size from pea to penny.
The hail ranged in size from marble to ping pong size. The wind was estimated at 40 to 50 mph.
A woman was caught outside and received several bruises.
The visibility was reduced to near zero in heavy rain and hail.
The hail ranged in size from dime to penny.
The hail ranged in size from pea to quarter.
The hail ranged in size from pea to quarter.
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, July 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: 30988, 30990, 31009, 30992, 31031, 31030, 31011, 30996, 30997, 30998, 30999, 31000.