A strong thunderstorm produced a funnel cloud over Monticello, Utah.
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The episode as NWS GJT wrote it up.
A strong thunderstorm produced a funnel cloud over Monticello, Utah.
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 Grand Junction, CO wrote its last area forecast discussion before the first event at Jul 5, 10:46 AM MST, 58 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND JUNCTION CO 1146 AM MDT SUN JUL 5 2015 .UPDATE... ISSUED AT 807 AM MDT SUN JUL 5 2015 MADE A FEW TWEAKS TO THE POP GRIDS FOR THIS MORNING BASED ON PRESENT COVERAGE OF PRECIPITATION. MAINLY BROUGHT SOME OF THE SOUTHERN ZONES DOWN A BIT. BUT IR SATELLITE INDICATED SOME HIGHER CLOUD TOPS OVER THE 4-CORNERS SO DID NOT REDUCE THE POPS TOO MUCH. I DID DECREASE THE THUNDERSTORM COVERAGE TO ISOLATED THROUGH THE MORNING ACROSS THE ENTIRE CWA...AND EVEN ISOLATED MAY BE OVER DOING IT. IT APPEARS THAT THE PRECIPITATION IS QUITE STRATIFORM AT THIS TIME...BUT WOULD NOT RULE OUT A FEW LIGHTNING STRIKES. WILL NOT RUN A NEW ZONE PACKAGE FOR NOW AS I LIKE THE WAY THE FORECAST READS AND DO NOT WANT THE WORDING TOO COMPLICATED. IT ALREADY HAS MENTION OF HEAVY RAIN POSSIBLE IN THE AFTERNOON. && .SHORT TERM...(TODAY THROUGH MONDAY) ISSUED AT 334 AM MDT SUN JUL 5 2015 VERY DEEP MOISTURE IS IN PLACE OVER THE REGION THIS MORNING WITH PRECIPITABLE WATER VALUES NEAR 1.5 INCHES IN SE UTAH. THE UPPER RIDGE WAS BEING DEFORMED SOUTHEASTWARD THIS MORNING AS A TROUGH LIFTED THROUGH NE UTAH-NW COLORADO THIS MORNING. THE UPPER TROUGH THEN TRACKS EAST ACROSS NW COLORADO THROUGH THE AFTERNOON. TODAY WILL BE A WET DAY FAVORING NW COLORADO IN THE AFTERNOON AS THE PASSING TROUGH PRODUCES ORGANIZED FORCING. IN SPITE OF DECENT STORM MOTION THIS AFTERNOON (TO THE EAST AT 15 MPH SOUTH...TO THE EAST 25 MPH NORTH)...THERE IS SOME POTENTIAL FOR HEAVY SHOWERS AND LOCALIZED FLOODING FAVORING WESTERN COLORADO. DRIER AIR WORKS OVER SE- EAST CENTRAL UTAH THROUGH THE DAY FOR DIMINISHING STORM COVERAGE. AFTERNOON TEMPERATURES WILL BE LOWERED TO AT OR BELOW AVERAGE UNDER CLOUDS AND SHOWERS. TONIGHT...SHOWERS END FROM SW TO NE THROUGH THE EVENING WITH SOME SHOWERS PERSISTING OVER THE NW CO MTNS PAST MIDNIGHT. TEMPERATURES REMAIN MILD WITH GUSTY OUTFLOW WINDS THROUGH THE EVENING AND CLOUDS THROUGH THE NIGHT. MONDAY...THE RIDGE IS FLATTENED TO THE SE WITH NW FLOW OVER MUCH OF THE REGION. MOISTURE ERODES WITH PW VALUES DOWN TO 1.00 INCH...WHICH IS STILL RESPECTABLE AMOUNTS. LATE-DAY SHOWERS WILL FAVOR THE MOUNTAINS AND SOUTHERN VALLEYS WHERE THE FLATTENED RIDGE KEEPS SLIGHTLY DEEPER MOISTURE AND SOME WEAK SHEER. .LONG TERM...(MONDAY NIGHT THROUGH SATURDAY) ISSUED AT 334 AM MDT SUN JUL 5 2015 THE MUCH TALKED ABOUT PLUME OF MOISTURE CONTINUES FOR ALMOST THE ENTIRE LONG TERM PERIOD. AN APPROACHING LOW PRESSURE SYSTEM WILL BRING SOUTHWESTERLY FLOW TO THE REGION WHILE SOUTHEASTERLY FLOW SETS UP OVER TX AND NM. EVEN THOUGH UPPER LEVEL FLOW GENERALLY REMAINS FROM THE WEST OVER ERN UT/WRN CO...THE TWO WIND FLOWS WILL KEEP MOISTURE PUMPING INTO THE AREA. THIS WILL KEEP UNSETTLED WX IN THE PICTURE THROUGH FRIDAY WITH PLENTY OF SHOWERS AND THUNDERSTORMS RECYCLING EACH AFTERNOON AND EVENING DUE TO WEAK IMPULSES MOVING OVERHEAD...DIURNAL HEATING...FAVORABLE OROGRAPHICS...AND MODERATE MIDLEVEL DESTABILIZATION. SOME SHOWERS AND STORMS WILL LIKELY CONTINUE OVERNIGHT. FLOODING CONCERNS WILL BE HEIGHTENED DURING THE PERIOD. LATEST GUIDANCE SUGGESTS A DRYING TREND NEXT SATURDAY AS THE AREA OF LOW PRESSURE OPENS UP AND CUTS OFF THE PLUME. BOTH EC AND GFS AGREE ON THIS SOLN BUT WITH IT BEING SO FAR OUT...PLENTY OF TIME FOR CHANGE. SO THE MESSAGE CONTINUES TO BE PLENTY OF MOISTURE...AFTERNOON SHOWERS/STORMS...OVERNIGHT CONVECTION...HEIGHTENED FLOODING CONCERNS. INCREASED CLOUDS THROUGH THE PERIOD WILL CAUSE TEMPS TO DROP CONSIDERABLY FROM WHAT WE'VE SEEN LATELY WITH HIGHS DROPPING TO BELOW NORMAL VALUES. && .AVIATION...(FOR THE 18Z TAFS THROUGH 18Z MONDAY AFTERNOON) ISSUED AT 1146 AM MDT SUN JUL 5 2015 WIDESPREAD RAIN SHOWERS CONTINUE OVER NORTHWEST COLORADO LATE THIS MORNING...BUT RAIN IS MORE SPOTTY FOR THE REST OF WESTERN CO AND EASTERN UT. HOWEVER AT 1730Z...CONVECTION IS BEGINNING TO DEVELOP SO EXPECT THAT THUNDERSTORMS WILL QUICKLY FORM... ESPECIALLY IN THE SOUTHWEST CORNER WHERE SOME CLEARING HAS OCCURRED. STORMS WILL INCREASE DURING THE AFTERNOON. HEAVY RAIN WILL BE POSSIBLE WITH SOME OF THE STRONGER STORMS. FLIGHT CONDITIONS MAY DROP BELOW ILS BREAKPOINTS AT TIMES. ALL TAF SITES WILL RUN THE GAMUT FROM VCSH TO -TSRA AFTER 18Z THROUGH 03Z. AFTER 03Z...SOME AREAS WILL CONTINUE TO SEE SHOWERS AND EVEN A FEW THUNDERSTORMS...POSSIBLY FOR THE ENTIRE OVERNIGHT PERIOD. EXPECT WIDESPREAD MOUNTAIN OBSCURATIONS...WHICH WILL IMPROVE LATE THIS EVENING. SOME LOW CLOUDS MAY HANG ALONG MOUNTAIN SLOPES THROUGH AROUND 15Z MONDAY. && .GJT WATCHES/WARNINGS/ADVISORIES... CO...NONE. UT...NONE. && UPDATE...EH SHORT TERM...JOE LONG TERM...TGR AVIATION...EH
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND JUNCTION CO 553 AM MDT SUN JUL 5 2015 COZ001>014-017>023-UTZ022>025-027>029-061200- LOWER YAMPA RIVER BASIN-CENTRAL YAMPA RIVER BASIN- ROAN AND TAVAPUTS PLATEAUS-ELKHEAD AND PARK MOUNTAINS- UPPER YAMPA RIVER BASIN-GRAND VALLEY-DEBEQUE TO SILT CORRIDOR- CENTRAL COLORADO RIVER BASIN-GRAND AND BATTLEMENT MESAS- GORE AND ELK MOUNTAINS/CENTRAL MOUNTAIN VALLEYS- CENTRAL GUNNISON AND UNCOMPAHGRE RIVER BASIN- WEST ELK AND SAWATCH MOUNTAINS-FLATTOPS- UPPER GUNNISON RIVER VALLEY-UNCOMPAHGRE PLATEAU AND DALLAS DIVIDE- NORTHWEST SAN JUAN MOUNTAINS-SOUTHWEST SAN JUAN MOUNTAINS- PARADOX VALLEY/LOWER DOLORES RIVER- FOUR CORNERS/UPPER DOLORES RIVER-ANIMAS RIVER BASIN- SAN JUAN RIVER BASIN-SOUTHEAST UTAH-EASTERN UINTA MOUNTAINS- EASTERN UINTA BASIN-TAVAPUTS PLATEAU-ARCHES/GRAND FLAT- LA SAL AND ABAJO MOUNTAINS-CANYONLANDS/NATURAL BRIDGES- 553 AM MDT SUN JUL 5 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN UTAH AND WESTERN COLORADO. .DAY ONE...TODAY AND TONIGHT WIDESPREAD SHOWERS AND THUNDERSTORMS WILL BRING SOME HEAVY RAINS TO THE REGION. FLOODING CONCERNS WILL BE HEIGHTENED. CONVECTION WILL LIKELY CONTINUE INTO THE OVERNIGHT THOUGH MORE SHOWERS THAN STORMS ARE EXPECTED. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY MOISTURE CONTINUES STREAMING UP FROM THE SOUTH MONDAY THROUGH FRIDAY WITH SHOWERS AND THUNDERSTORMS OCCURRING EACH AFTERNOON AND EVENING. GREATEST COVERAGE IS EXPECTED MONDAY DROPPING EACH DAY AFTER THAT. DRY WEATHER LOOKS TO MAKE A RETURN SATURDAY AND BEYOND. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED TODAY OR TONIGHT...HOWEVER SPOTTERS ARE ENCOURAGED TO RELAY RAINFALL AMOUNTS OR ANY OBSERVED FLOODING TO THE GRAND JUNCTION FORECAST OFFICE.
The Grand Junction radar (KGJX), 165 km away, was scanning. The volume nearest the first event began at 18:43 UTC.
1 funnel cloud. Local standard time, as filed.
A funnel cloud developed over the east side of Monticello.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Utah in 2015Every state in 2015This day in weather historyWarnings in Utah, July 2015
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: 576109.