Hail in Colorado, September 6, 2001

Name: Hail in Colorado, September 6, 2001
Start: 2001-09-06T13:30
End: 2001-09-06T13:30
Location: Colorado

September 6, 2001 · NWS BOU · 1 event in 1 county or zone

1 hail, as filed by the National Weather Service.

Where it happened

Every event with a place to put it. 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

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 1

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 Sep 6, 2:45 AM MST, 10 hours 45 minutes earlier.

Area forecast discussion, Sep 6, 2:45 AM MST, 10 hours 45 minutes before

NORTHEAST AND NORTH CENTRAL COLORADO AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DENVER COLORADO
345 AM MDT THU SEP 6 2001

WEATHER WILL TURN FROM SUMMER TO FALL IN ABOUT 3 TO 6 HOURS TONIGHT
AS SURFACE FRONT RACES SOUTH FROM WYOMING.  AHEAD OF THIS FRONT TODAY
ANOTHER WARM DAY ON TAP.  DEEPENING SURFACE FRONT AND POOL OF 50S
DEWPOINTS IN NORTHEAST COLORADO WILL ACT AS FOCUS FOR CONVECTION BY
THIS EVENING...AND SOME STORMS MAY BE SEVERE.  MOUNTAINS SHOULD HAVE
ANOTHER ROUND OF CNVTN...IF DRY SLOT MOVING ACRS SRN UT DOES NOT
INTERFERE WITH PROCESS.  THERE SHOULD BE PLENTY OF LIFT AHD OF UPR
LOW SO WILL KEEP SCT TSTMS MENTIONED.

TIMING OF PRECIPITATION IN ERN CO DIFFICULT...BUT SHUD GET THE TSTMS
ALG/AHEAD OF COLD FRONT TONIGHT...AND A PERIOD OF UPSLOPE RAIN LATE
TONIGHT.  WILL GET A BREAK FRIDAY AND FRIDAY EVNG...THEN NORTHERLY
FLOW WILL BRING ANOTHER STG SURGE OF COLD AIR/ AND UPR TROF RACING
ACROSS NERN CO AGAIN FRI NIGHT...SO WILL HAVE ANOTHER CHANCE AT
USPLOPE PRECIP LATE FRI NIGHT AND EARLY SAT.  IF TEMPS WERE A FEW
DEGREES COLDER...WE COULD SEE SOME SNOW.  WE WILL SEE THE COOLEST
TEMPS IN A WHILE THOUGH...AS COLD AIR WILL STAY UNTIL EARLY
SUNDAY...WITH HIGHS IN THE 60S...LOWS BY SUNDAY MORNING MAY DROP
INTO THE 30S.

IN THE MOUNTAINS...THIS WILL NOT INITIALLY BE A GREAT OROGRAPHIC
EVENT...ALTHOUGH IT WILL BE COLD ENOUGH TO SNOW...IN THE HIGHER
PASSES.  WILL HAVE TO WATCH FRIDAY NIGHT...AS 700 MB TEMPS WILL DROP
TO -4.  GOOD COLD ADVECTION IN COMBINATION WITH UPR TROF IN NW FLOW
MAY GIVE SOME MEASURABLE SNOW TO LOWER ELEVATIONS.  LATER SHIFTS
WILL BE ABLE TO OUT MORE DETAIL INTO MOUNTAIN SNOW.

SUMMER WILL RETURN NEXT WEEK AS FLOW BECOMES MORE ZONAL...LEE
TROUGHS DEVELOP...AND COLD AIR SLIDES EAST.

.DEN...NONE.

In the hours before

Special weather statement, Sep 6, 9:25 AM MST, 4 hours 5 minutes before

COZ030>051-052000-

HAZARDOUS WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO
NATIONAL WEATHER SERVICE DENVER CO
1025 AM MDT THU SEP 6 2001

THIS OUTLOOK PERTAINS TO THE FOLLOWING COLORADO COUNTIES

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

SYNOPSIS:  THE ATMOSPHERE OVER NORTHEAST COLORADO TODAY WILL BE WARM
AND RELATIVELY DRY WHILE A VIGOROUS UPPER LEVEL SYSTEM APPROACHES
THE STATE FROM THE NORTHWEST.  WINDS ALOFT WILL BE INCREASING AHEAD
OF THE APPROACHING SYSTEM AND THESE WILL COMBINE WITH SCATTERED
SHOWERS OR THUNDERSTORMS EXPECTED OVER THE MOUNTAINS TO PRODUCE WIND
GUSTS OF 40 TO 50 MPH.  ON THE NORTHEAST PLAINS...SOUTHWEST WINDS OF
10 TO 20 MPH WILL CHANGE TO A NORTHERLY DIRECTION DURING THE
AFTERNOON HOURS.  THE ATMOSPHERE ON THE PLAINS WILL BE TOO DRY FOR
ANY SHOWERS OR THUNDERSTORMS TO DEVELOP.  SPOTTER ACTIVATION WILL
NOT BE NEEDED TODAY.

BIG CHANGES ARE IN STORE FOR THE NORTHEAST PLAINS THIS EVENING AS A
STRONG COLD FRONT DROPS ACROSS THE STATE WITH GUSTY NORTHERLY
WINDS...FALLING TEMPERATURES AND A CHANCE OF RAIN SHOWERS OR
THUNDERSTORMS.  WIND GUSTS OF 30 TO 45 MPH WILL BE POSSIBLE WITH THE
PASSING COLD FRONT WHICH MAY PRODUCE AREAS OF BLOWING DUST.

OUTLOOK FOR FRIDAY...COOLER AND STABLE AIR WILL REMAIN OVER THE
FORECAST AREA WITH SOME UPSLOPE WINDS CAUSING AREAS OF LIGHT RAIN IN
THE MORNING.

DANKERS

@RUKWBCe	KDENWWUS85 KBOU 061624 CCA
SPSDEN
COZ030>051-062000-

HAZARDOUS WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO
NATIONAL WEATHER SERVICE DENVER CO
1025 AM MDT THU SEP 6 2001

THIS OUTLOOK PERTAINS TO THE FOLLOWING COLORADO COUNTIES

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

SYNOPSIS:  THE ATMOSPHERE OVER NORTHEAST COLORADO TODAY WILL BE WARM
AND RELATIVELY DRY WHILE A VIGOROUS UPPER LEVEL SYSTEM APPROACHES
THE STATE FROM THE NORTHWEST.  WINDS ALOFT WILL BE INCREASING AHEAD
OF THE APPROACHING SYSTEM AND THESE WILL COMBINE WITH SCATTERED
SHOWERS OR THUNDERSTORMS EXPECTED OVER THE MOUNTAINS TO PRODUCE WIND
GUSTS OF 40 TO 50 MPH.  ON THE NORTHEAST PLAINS...SOUTHWEST WINDS OF
10 TO 20 MPH WILL CHANGE TO A NORTHERLY DIRECTION DURING THE
AFTERNOON HOURS.  THE ATMOSPHERE ON THE PLAINS WILL BE TOO DRY FOR
ANY SHOWERS OR THUNDERSTORMS TO DEVELOP.  SPOTTER ACTIVATION WILL
NOT BE NEEDED TODAY.

BIG CHANGES ARE IN STORE FOR THE NORTHEAST PLAINS THIS EVENING AS A
STRONG COLD FRONT DROPS ACROSS THE STATE WITH GUSTY NORTHERLY
WINDS...FALLING TEMPERATURES AND A CHANCE OF RAIN SHOWERS OR
THUNDERSTORMS.  WIND GUSTS OF 30 TO 45 MPH WILL BE POSSIBLE WITH THE
PASSING COLD FRONT WHICH MAY PRODUCE AREAS OF BLOWING DUST.

OUTLOOK FOR FRIDAY...COOLER AND STABLE AIR WILL REMAIN OVER THE
FORECAST AREA WITH SOME UPSLOPE WINDS CAUSING AREAS OF LIGHT RAIN IN
THE MORNING.

DANKERS

Special weather statement, Sep 6, 9:25 AM MST, 4 hours 5 minutes before

COZ030>051-062000-

HAZARDOUS WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO
NATIONAL WEATHER SERVICE DENVER CO
1025 AM MDT THU SEP 6 2001

THIS OUTLOOK PERTAINS TO THE FOLLOWING COLORADO COUNTIES

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

SYNOPSIS:  THE ATMOSPHERE OVER NORTHEAST COLORADO TODAY WILL BE WARM
AND RELATIVELY DRY WHILE A VIGOROUS UPPER LEVEL SYSTEM APPROACHES
THE STATE FROM THE NORTHWEST.  WINDS ALOFT WILL BE INCREASING AHEAD
OF THE APPROACHING SYSTEM AND THESE WILL COMBINE WITH SCATTERED
SHOWERS OR THUNDERSTORMS EXPECTED OVER THE MOUNTAINS TO PRODUCE WIND
GUSTS OF 40 TO 50 MPH.  ON THE NORTHEAST PLAINS...SOUTHWEST WINDS OF
10 TO 20 MPH WILL CHANGE TO A NORTHERLY DIRECTION DURING THE
AFTERNOON HOURS.  THE ATMOSPHERE ON THE PLAINS WILL BE TOO DRY FOR
ANY SHOWERS OR THUNDERSTORMS TO DEVELOP.  SPOTTER ACTIVATION WILL
NOT BE NEEDED TODAY.

BIG CHANGES ARE IN STORE FOR THE NORTHEAST PLAINS THIS EVENING AS A
STRONG COLD FRONT DROPS ACROSS THE STATE WITH GUSTY NORTHERLY
WINDS...FALLING TEMPERATURES AND A CHANCE OF RAIN SHOWERS OR
THUNDERSTORMS.  WIND GUSTS OF 30 TO 45 MPH WILL BE POSSIBLE WITH THE
PASSING COLD FRONT WHICH MAY PRODUCE AREAS OF BLOWING DUST.

OUTLOOK FOR FRIDAY...COOLER AND STABLE AIR WILL REMAIN OVER THE
FORECAST AREA WITH SOME UPSLOPE WINDS CAUSING AREAS OF LIGHT RAIN IN
THE MORNING.

DANKERS

The radar

The Denver radar (KFTG), 28 km away, was scanning. The volume nearest the first event began at 20:31 UTC.

Open the radar archive at this moment

Event by event

1 hail. Local standard time, as filed.

Hail, Arapahoe

When: September 6, 1:30 PM MST
Where: Arapahoe County, Aurora Cherry Creek
Measured: 0.75 in hail
Reported by: TRAINED SPOTTER
Coordinates: 39.633, -104.800

What these are

Hail: Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.

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

The same day elsewhere

Every storm in Colorado in 2001 Every state in 2001 This day in weather history Warnings in Colorado, September 2001

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: 5266249.