Colorado, 2002

Flash Flooding in Colorado, June 27, 2002

June 27, 2002 · NWS BOU · 2 events in 2 counties and zones

2 flash flood, as filed by the National Weather Service.

Where it happened

Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
2

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.

What forecasters said that day

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 Jun 27, 1:45 PM MST, 1 hour 15 minutes earlier.

Area forecast discussion, Jun 27, 1:45 PM MST, 1 hour 15 minutes before
NORTHEAST AND NORTH CENTRAL COLORADO AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DENVER COLORADO
245 PM MDT THU JUN 27 2002

HIGH PRESSURE RIDGE AGAIN IN CONTROL OF THE STATE. DESPITE THE
CONTINUATION OF SFC SOUTHEAST FLOW OVR THE PLAINS THIS AFTN THE
ATMSPHR SLIGHTLY DRIER AND CAPE VALUES MUCH LESS THAN YESTERDAY.
THE AREA IS RATHER CAPPED IN THE FIRST PLACE ESP ON THE PLAINS. TCU
FIELD GATHERING THIS EARLY AFTN OVR THE HIGHER TRRN BUT MESO ETA
FCST SOUNDINGS SHOWING LOWER AND MID LVL FLOW FROM THE SOUTH TO
SOUTHEAST. LIKE YESTERDAY...ANY STORMS WILL HAVE A DIFFICULT TIME
COMING OFF THE HILLS. WILL KEEP ISOLD POPS IN THE HIGH COUNTRY AND
URBAN CORRIDOR WITH NOTHING ON THE FAR PLAINS FOR TNGT. MORE RIDGING
FOR THE AREA FRI/FRI EVE. THERE SHD BE ENOUGH MOISTURE ON PLAINS TO
KEEP IN AN ISOLD CHNC BUT WILL KEEP THE FAR NORTHEAST VOID OF POPS.
CAPE VALS ARE SOMEWHAT BETTER FOR FRIDAY BUT STILL PRETTY WARM ALOFT
WITH 700MB TEMPS IN THE UPPER TEENS. ADVANCING UPPER TROUGH MOVING
INTO THE NORTHWEST USA PROVIDING A TIGHTER GRADIENT OVR THE NORTHERN
ROCKIES. THIS ENERGY WILL LIKELY STAY TO THE NORTH OF THE STATE AND
WILL INCREASE THE WARMER SOUTHWEST FLOW OVR COLO. 700 TEMPS BECOME
WARMEST FOR SATURDAY AND SUNDAY WITH 594 HEIGHTS OVER THE STATE BY
MIDDAY SUN. SFC FLOW EXPECTED TO REMAIN MAINLY SOUTHEASTERLY UNTIL
SUNDAY. THE AVN SHOWS NORTHEAST WINDS ENTERING THE CWA LATE IN THE
DAY SUNDAY WHICH IS APPARENTLY FROM A SURGE THAT IS BROUGHT DOWN
FROM THE FASTER FLOW TO THE NORTH. THIS WOULD BEAR WATCHING IN LATER
RUNS BUT FOR NOW WILL LEAVE AN ISOLD CHNC.

LONG TERM DISCUSSION: MONDAY THROUGH THURSDAY...THE PASSING SURGE ON
SUNDAY PROVIDES RETURN SFC FLOW OUT OF THE SOUTHEAST FOR MONDAY.
THROUGH THE EXTENDED...THE UPPER RIDGE EXPANDS AND BECOMES CENTERED
OVR THE GULF BY WED. IF THE CIRCULATION AROUND THE MASSIVE HIGH
IMPROVES...WE MAY START TO SEE DEEPER SUBTROPICAL MOISTURE ADVANCING
NORTH OFF THE HIGHER MEXICAN TERRAIN AND INTO THE STATE AFTER
WEDNESDAY. FREDIN

.DEN...NONE.

In the hours before

Special weather statement, Jun 27, 9:45 AM MST, 5 hours 15 minutes before
COZ030>051-272000-

HAZARDOUS WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO
NATIONAL WEATHER SERVICE DENVER COLORADO
1045 AM MDT THU JUN 27 2002

THIS OUTLOOK PERTAINS TO THE FOLLOWING COLORADO COUNTIES

ADAMS     ARAPAHOE  BOULDER     BROOMFIELD  CLEAR CREEK  DENVER
DOUGLAS   ELBERT    GILPIN      GRAND       JACKSON      JEFFERSON
LARIMER   LINCOLN   LOGAN       MORGAN      PARK         PHILLIPS
SEDGWICK  SUMMIT    WASHINGTON  WELD

SYNOPSIS: A LARGE RIDGE OF HIGH PRESSURE CONTINUES TO BE ANCHORED
OVER THE STATE.  HOWEVER...THE ATMOSPHERE WILL MANAGE TO BECOME
SLIGHTLY UNSTABLE AFTER 100 PM AND ISOLATED THUNDERSTORMS ARE
EXPECTED TO DEVELOP ON THE FOOTHILLS AND MOUNTAINS THIS AFTERNOON.
THE AIRMASS OVER THE PLAINS WILL BE TOO STABLE FOR THUNDERSTORM
DEVELOPMENT UNTIL LATE THIS AFTERNOON INTO THIS EVENING.  THE WINDS
ALOFT ARE VERY WEAK AND NOT SUPPORTIVE OF SEVERE THUNDERSTORM
DEVELOPMENT.

SPOTTER ACTIVATION IS NOT EXPECTED.

OUTLOOK FOR FRIDAY:  ISOLATED LATE DAY THUNDERSTORMS.

The radar

The Denver radar (KFTG), 64 km away, was scanning. The volume nearest the first event began at 22:02 UTC.

Open the radar archive at this moment

Event by event

2 flash flood. Local standard time, as filed.

Flash Flood, Jefferson

When
June 27, 3:00 PM MST to 4:15 PM MST
Where
Jefferson County, South Portion
Reported by
EMERGENCY MANAGER
Coordinates
39.586, -105.250 (the zone’s center; the record gives no point)

Flash Flood, Douglas

When
June 27, 3:00 PM MST to 4:15 PM MST
Where
Douglas County, Southwest Portion
Reported by
EMERGENCY MANAGER
Coordinates
39.330, -104.930 (the zone’s center; the record gives no point)

Heavy rain, up to three quarters of an inch, fell across sections of the Hayman burn area near Cheeseman Reservoir. Several forest service roads were washed out and many culverts plugged by debris. Road maintenance had to be brought in to repair the road damage.

What these are

Flash Flood
Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Colorado in 2002Every state in 2002This day in weather historyWarnings in Colorado, June 2002

Sources

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: 5305168, 5305169.