Severe thunderstorms produced damaging winds across parts of Arapahoe, Denver and Morgan Counties. The winds downed trees and power lines which produced electrical outages.
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 BOU wrote it up.
Severe thunderstorms produced damaging winds across parts of Arapahoe, Denver and Morgan Counties. The winds downed trees and power lines which produced electrical outages.
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 Denver/Boulder, CO wrote its last area forecast discussion before the first event at Oct 1, 2:00 PM MST, 11 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER/BOULDER CO 300 PM MDT WED OCT 1 2014 .SHORT TERM...(THIS EVENING THROUGH THURSDAY) ISSUED AT 300 PM MDT WED OCT 1 2014 THE UPPER LEVEL LOW WITH SURFACE FRONT HAS MOVED OVER THE WESTERN PORTIONS OF THE STATE SWITCHING WARMER SOUTHWEST FLOW TO WNW BRINGING COOLER AIR DOWN TO THE SURFACE. THESE COOLER TEMPERATURES COMBINED WITH DECREASING WET BULB ZEROS THROUGH THE AFTERNOON HAVE BROUGHT SNOW DOWN TO 8000-8500 FT. THE SNOW WILL CONTINUE THROUGH THE EVENING IN THE MOUNTAINS AND HIGHER FOOTHILLS WITH AN ADDITIONAL 1-2 INCHES OVERNIGHT OVER THE HIGHER MOUNTAINS WHERE YOU HAVE DECENT QG VV AND UPSLOPE. THE WINTER WEATHER ADVISORY WILL END AT MIDNIGHT WHEN THE SNOW TAPERS OFF. AT LOWER ELEVATIONS WITH THE COLD FRONT AND SECONDARY SURGE OF COOLER AIR FROM A DISORGANIZED FRONT THAT WILL DROP DOWN INTO COLORADO LATER THIS AFTERNOON SHOWERS WITH ONLY ISOLATED THUNDERSTORMS WILL BE POSSIBLE. THERE IS DECENT LIFT THROUGH THE PERIOD WITH LAPSE RATES OVER DENVER OF 8.6 C/KM BUT DUE TO LACK OF MUCH HEATING THIS AFTERNOON AND VERY LITTLE CAPE WIDESPREAD DEVELOPMENT IS NOT EXPECTED. GUSTY WINDS ARE POSSIBLE WITH THE SHOWERS WITH WIND SPEEDS GUSTING UP TO 25 MPH OVER THE PLAINS AND 40 MPH OVER THE HIGHER MOUNTAINS ABOVE TIMBERLINE. CLOUDS WILL LINGER OVER THE PLAINS AND HIGHER MOUNTAINS...ESPECIALLY ON THE WESTERN SLOPES AND VALLEYS THROUGH THE EVENING WITH SKIES CLEARING BY MORNING WITH SUBSIDENCE MOVING IN. .LONG TERM...(THURSDAY NIGHT THROUGH WEDNESDAY) ISSUED AT 300 PM MDT WED OCT 1 2014 INITIALLY...A QUICK MOVING COLD FRONT WILL BE SWEEPING ACROSS THE NORTHEAST PLAINS THURSDAY EVENING. THE NAM AND GFS BOTH SHOW A STRONG THERMAL GRADIENT MARCHING ACROSS THE NORTHEAST CORNER OF THE STATE FROM 00Z THROUGH 12Z...BUT BOTH MODELS ALSO LIMIT ANY AREA OF PRECIPITATION TO SOUTHEASTERN WYOMING AND WESTERN NEBRASKA. QUASI-GEOSTROPHIC DIAGNOSTICS SHOW ONLY A FEW HOURS OF RISING VERTICAL MOTIONS AS THE FRONT MOVES THROUGH...BUT THEN ADDITIONAL SUBSIDENCE. WILL MENTION ISOLATED RAIN SHOWERS OVER THE NORTHEAST CORNER OF THE FORECAST AREA THURSDAY EVENING...IN CASE A LINE OF SHOWERS DEVELOPS IN WYOMING. THE COOL AIR MOVING INTO THE STATE WILL LINGER OVER THE PLAINS THROUGH FRIDAY MORNING. WITH SKIES BECOMING MOSTLY CLEAR LATE THURSDAY NIGHT...IT IS POSSIBLE THAT MORNING LOWS ON FRIDAY COULD BE NEARING THE FREEZING MARK. AT THIS TIME...ONLY THE PALMER DIVIDE REGION IS EXPECTED TO BE LOWER THAN 32. AFTER FRIDAY MORNING...STRONG UPPER LEVEL RIDGING WILL BE BUILDING OVER COLORADO AND THE SOUTHWESTERN U.S. WHICH WILL CONTINUE THROUGH THE FIRST HALF OF NEXT WEEK. TEMPERATURES WILL BE GRADUALLY WARMING THROUGH THE PERIOD AS SKIES REMAIN MOSTLY CLEAR. DRY AND MILD WILL BE THE PRIMARY MESSAGE. && .AVIATION...(FOR THE TAFS THROUGH 00Z THURSDAY LATE AFTERNOON) ISSUED AT 300 PM MDT WED OCT 1 2014 CLOUDS AND PRECIP WILL STEADILY START TO MOVE IN AS THE FRONT MAKES IT WAY EASTWARD OFF THE MOUNTAINS. AS THE FRONT MOVES OVER WATCH FOR WINDS TO BECOME VARIABLE AND STRONGER WITH GUSTING UP TO 20 MPH AND RAIN STARTING BETWEEN 20 AND 21Z. WITH THIS SECONDARY PUSH OF COOLER AIR AND MOISTURE SHOWERS WILL CONTINUE INTO THE EVENING WITH SOME CONVECTION POSSIBLE IN THE VICINITY ALONG THE FOOTHILLS THIS AFTERNOON. CIGS WILL DECREASE STARTING AROUND 21Z TO BELOW 5000 FT AGL THEN BELOW 3000 BY 00Z. CONDITIONS SHOW IMPROVEMENT AFTER 04Z WITH SOME LIGHT FOG DEVELOPING IN LOW LYING AREAS THEN SCATTERING OUT BY 16Z. && .BOU WATCHES/WARNINGS/ADVISORIES... WINTER WEATHER ADVISORY UNTIL MIDNIGHT MDT TONIGHT FOR COZ031- 033-034. && SHORT TERM...BOWEN LONG TERM...DANKERS AVIATION...BOWEN
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER/BOULDER CO 1103 AM MDT WED OCT 1 2014 COZ030>051-021715- JACKSON COUNTY BELOW 9000 FEET- WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- GRAND AND SUMMIT COUNTIES BELOW 9000 FEET- SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET-LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET- CENTRAL AND SOUTHEAST PARK COUNTY- LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY- NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY- ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET- NORTHEAST WELD COUNTY-CENTRAL AND SOUTH WELD COUNTY-MORGAN COUNTY- CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY- SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN COUNTY- LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-PHILLIPS COUNTY- 1103 AM MDT WED OCT 1 2014 ...THERE IS A WINTER WEATHER ADVISORY FOR THE MOUNTAINS FROM THIS AFTERNOON THROUGH MIDNIGHT TONIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT A COLD FRONT IS MOVING ACROSS THE MOUNTAINS LATE THIS MORNING AND CROSS THE NORTHEAST PLAINS OF COLORADO DURING THE AFTERNOON. SHOWERS AND ISOLATED THUNDERSTORMS WILL DEVELOP WITH THE FRONTAL PASSAGE. SNOW LEVELS WILL ALSO DROP TO NEAR 10 THOUSAND FEET THIS AFTERNOON AND 8500 FEET OVERNIGHT. AREAS ABOVE 10 THOUSAND FEET COULD SEE 4 TO 7 INCHES OF SNOW ACCUMULATION BY MIDNIGHT TONIGHT. TRAVEL OVER THE HIGH MOUNTAIN PASSES AND AROUND THE EISENHOWER TUNNEL MAY BECOME DIFFICULT LATER TODAY DUE TO FALLING SNOW ALONG WITH ICY AND SNOW COVERED ROADWAYS. SNOWFALL IN THE HIGH COUNTRY IS EXPECTED TO TAPER OFF AFTER MIDNIGHT WITH THE RAINFALL ON THE PLAINS ENDING BEFORE MORNING AS THE STORM SYSTEM EXITS THE STATE. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY A COLD FRONT WILL MOVE INTO NORTHEAST COLORADO THURSDAY EVENING WITH A FEW SHOWERS ALONG THE WYOMING AND NEBRASKA BORDERS. CONTINUED COOLER TEMPERATURES ARE EXPECTED BEHIND THE FRONT ON FRIDAY. BY FRIDAY MORNING...LOW TEMPERATURES MAY DROP CLOSE TO FREEZING...SO PROTECTION OF LATE SEASON GARDENS AND SENSITIVE VEGETATION MAY BE NECESSARY. DRY CONDITIONS WITH A WARMING TREND ARE EXPECTED THROUGH THE WEEKEND ACROSS THE MOUNTAINS AND NORTHEAST COLORADO. AFTERNOON HIGH TEMPERATURES WILL RETURN TO SEASONAL NORMALS THROUGH THE FIRST PART OF NEXT WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.
The Denver radar (KFTG), 35 km away, was scanning. The volume nearest the first event began at 21:10 UTC.
4 thunderstorm wind. Local standard time, as filed.
Intense winds knocked a tree down at the Denver Technology Center which caused a power outage.
Damaging winds knocked down branches and power lines.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2014Every state in 2014This day in weather historyWarnings in Colorado, October 2014
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 2026-10-01. Each event’s entry at NCEI: 545230, 545233, 545234, 545232.