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2010 Season Summary

Meteorological support services for 2010 were provided by Genesis Weather Solutions and Skyview Weather.

Click on the date hyperlink to see gauge and radar derived precipitation estimates for each event.

 

 

 

 

 

   

 

> 0.6" RADAR ESTIMATE OR 0.5" GAUGED IN FORECAST AREA

Event

Date

Max ALERT

Max CoCoRaHS

QPE STP

 ALERT
Alarms

 ALERT

Rain

Alarms

Note

ADAM

ARAP

AURA

BLDR

BROM

DENV

DOUG

JEFF

1

21-APR

1.59"

1.63"

NA

   

M-1 issued for: Adams Co, Arapahoe Co, Aurora, Denver Co, Douglas Co and DIA. M-A issued for Boulder County.

 

Radar-derived QPE was not available due to disk/storage problem on local server.

X

X

X

X

2

22-APR

1.46"

1.49"

1.95"

   

M-1 issued for: Adams Co, Arapahoe Co, Aurora, Denver Co, Douglas Co, Jefferson Co and DIA.

 

Red Flood Alert issued for Douglas County and Adams County.

 

Note that this event included snowfall. ALERT and CoCoRAHS readings may be skewed by snowfall.


X

X

 

  X

3

18-MAY 0.51" 0.34" 2.06"    

M-1 issued for Douglas Co, Arapahoe Co, Aurora, Jefferson Co, Denver Co, Adams Co, Broomfield Co and DIA. M-A issued for Boulder Co.

QPE estimates were higher than ALERT and CoCoRaHS observations. Heavy rainfall and tornadoes observed in Weld Co.

  X

 

 

4

26-MAY 0.51" 0.51" 4.65"    

M-1 issued for Adams Co, Arapahoe Co, Denver Co, Broomfield Co, Jefferson Co, City of Aurora and DIA.

M-A issued for Boulder Co.

Red Flood Alert issued for Adams Co.

A large storm occured in the extreme northeast corner of the District. This portion of the District lacks both ALERT gages and CoCoRAHS observers. The storm contained a large amount of hail and tornado activity.

  X

 

 

 

X

X

 

 

5

29-MAY 0.71" 0.89" 0.79"    

M-1 issued for Adams Co, Broomfield Co and Jefferson Co.

M-A issued for Boulder Co.

Red Flood Alert issued for Adams Co, Broomfield Co, Boulder Co and Jefferson Co.

Moderate storm in the northwest portion of the District. Very little hail. Good correlation between ALERT, CoCoRAHs and radar precipitation observations.

 

 

 

 

 

X

6

08-JUN 0.51" 0.44" 1.21"    

M-B issued for Boulder Co.

Moderate storms developed in the southern portions of the District and north in Boulder Co. ALERT gage reports exceeding 0.55" were recorded in Boulder Co but these gages are outside of the forecast area shown on the map.

Also note that the highest ALERT rain accumulation within the forecast area of 0.51" was influenced by irrigation.

 

 X

  X

 

 

 

  X

 

7

09-JUN 0.31" 0.26" 0.50"    

M-A issued for Boulder Co.

M-1 issued for Arapahoe Co, Douglas Co, Jefferson Co and the City of Aurora.

Minor storm developed in the eastern portion of the District.

The highest ALERT rain accumulation within the forecast area of 0.31" was influenced by irrigation.

 

 

 

 

 

 

 

 

8

10-JUN 0.39" 0.32" 1.40"    

M-A issued for Boulder Co.

M-1 issued for Adams Co, Arapahoe Co, Broomfield Co, Denver Co, Douglas Co, DIA and the City of Aurora.

Moderate bands of precipitation occured in the central and eastern portions of the District.

Boulder Creek was flowing between 600 and 700 cfs from snowmelt. Additional runoff from rain storms could be problematic.

  X

  X

 

 

 

9

11-JUN 2.24" 2.32" 2.60"  Table  Map

M-A issued for Boulder Co.

M-B issued for Boulder Co.

M-1 issued for Jefferson Co, Adams Co, Arapahoe Co, Broomfield Co, Denver Co, Douglas Co, DIA and the City of Aurora.

Widespread moderate to heavy rainfall

X

10

12-JUN 0.91" 1.57" 0.66"    

M-B issued for Boulder Co.

M-1 issued for Jefferson Co, Adams Co, Arapahoe Co, Broomfield Co, Denver Co, Douglas Co, DIA and the City of Aurora.

Widespread moderate rainfall

Max CoCoRAHS observation of 2.36" seems suspect

X

X

X

X

 

 

 

X

11

13-JUN 0.59" 0.77" 1.13"  Table  Map

M-B issued for Boulder Co.

Moderate storm developed just southwest of the District.

 

 

 

X

 

 

X

X

12

20-JUN 0.08" 0.07" 0.43"    

M-1 issued for Jefferson Co, Adams Co, Arapahoe Co, Broomfield Co, Denver Co, Douglas Co, DIA and the City of Aurora.

M-A issued for Boulder Co.

Very little thunderstorm activity observed in the District. The correlation between observed precipitation and radar precipitation is not great.

 

 

 

 

 

 

 

 

13

21-JUN 0.20" 0.40" 1.00"    

M-1 issued for Adams Co, Broomfield Co, Denver Co and DIA.

M-A issued for Boulder Co.

Red Flood Alert issued for Adams Co.

Heavy band of precipitation observed to the north of the District and in Boulder County.

  X

 

 

 

 

 

14

27-JUN 0.59" 1.04" 1.66"  Table  Map

M-1 issued for Adams Co, Arapahoe Co, Denver Co, Douglas Co, City of Aurora and DIA.

Red Flood Alert issued for Arapahoe Co, Douglas Co and City of Aurora.

Several cells of heavy precipitation developed in the central, southern and western portions of the District.

 X

 

 

 

 

15

2-JUL 0.87" 1.17" 0.98"    

M-1 issued for Adams Co, Arapahoe Co, Denver Co, Douglas Co, Jefferson Co, Broomfield Co, City of Aurora and DIA.

M-A issued for Boulder Co.

Moderate storm cells developed in Boulder County.

 

X

 

 

16

4-JUL 2.64" 3.14" 6.10"  Table  Map

M-1 issued for the entire District.

M-A issued for Boulder Co.

Red Flood Alerts issued for DIA, Arapahoe Co, City of Aurora, Adams Co, Douglas Co, Boulder Co, Jefferson Co, Arvada, Wheat Ridge, Denver Co and Broomfield Co.

Moderate to heavy storm cells developed across entire District. Extreme storms developed in the southern portions of the District and in Douglas County.

Note that the rain accumulation reported by the Russelville Gulch rain gage (ID 2900) was incorrect due to data validation issues. The actual accumulation for Russelville Gulch (ID 2900) for the period July 4 at 7:00 AM through July 5 at 7:00 AM was 2.72 inches which would have made it the highest reporting ALERT gage in the District.

17

6-JUL 0.59" 0.87" 1.59"  Table  Map

M-1 issued for Denver Co, DIA, Adams Co, Arapahoe Co, City of Aurora, Jefferson Co, Douglas Co and Broomfield Co.

M-A issued for Boulder Co.

Red Flood Alert issued for DIA, Adams Co, Jefferson Co, Wheat Ridge and Douglas Co.

Note that Russelville Gulch rain gage (ID 2900) may still be under-reporting total accumulation for July 6, 2010. The radio telemetry issues for this site were fixed on July 7, 2010.

 

 

18

7-JUL 1.06" 1.19" 1.68"    

M-1 issued for Denver Co, DIA, Adams Co, Arapahoe Co, City of Aurora, Jefferson Co, Douglas Co and Broomfield Co.

Red Flood Alert issued for Arapahoe Co and City of Aurora

Moderate to heavy storm cells developed in the Northwest and Southeast portions of the District.

X

X

X

 

 

X

X

19

8-JUL 0.47" 0.51" 2.16"  Table  Map

M-1 issued for Douglas Co, Jefferson Co, Adams Co and Broomfield Co.

M-A issued for Boulder Co.

Moderate thunderstorms developed in Jefferson and Douglas Counties.

 

 

 

 

 

 

 X

20

14-JUL 0.39" 0.34" 0.71"    

M-1 issued for Douglas Co, Arapahoe Co and City of Aurora.

Moderate storm cells developed in the southern portions of the District and in northern Jefferson County.

 

 

 

 

 

 

 

21

20-JUL 1.26" 1.66" 1.39"  Table  Map

M-1 issued for Denver Co, Arapahoe Co, Douglas Co and City of Aurora.

M-A issued for Boulder Co.

Red Flood Alert issued for Douglas Co, Arapahoe Co and City of Aurora.

Severe storm cells developed in the southern portions of the District including Douglas County.

 

 X

  X

 

 

 

 X

22

21-JUL 0.98" 1.04" 1.40"    

M-1 issued for Jefferson Co, Douglas Co, Broomfield Co, Adams Co, Denver Co, Arapahoe Co, City of Aurora and DIA.

M-A issued for Boulder Co.

Moderate storm cells developed in the southern portions of the District including Douglas County.

 

 

 

 

 

 

  X

  X

23

22-JUL 0.47" 0.96" 1.02"  Table  Map

M-1 issued for Douglas Co, Jefferson Co, Arapahoe Co, City of Aurora, Broomfield Co, Denver Co and Adams Co.

M-A issued for Boulder Co.

Moderate storms developed in southern portions of the District and Jefferson County.

  X

 

 

 

 

 

 X

  X

24

27-JUL 0.71" 0.76" 1.24"    

M-1 issued for Jefferson Co, Arapahoe Co, City of Aurora, DIA, Adams Co and Douglas Co.

M-A issued for Boulder Co.

Moderate to severe storms developed in western portions of the District, Boulder County and the northeast portions of the District.

  X

 

 X

 X

 

 

  X

  X

25

28-JUL 0.90" 1.02" 1.30"    

M-1 issued for Jefferson Co, Douglas Co, Arapahoe Co, City of Aurora, Denver Co, DIA, Adams Co and Broomfield Co.

M-A issued for Boulder County.

Severe storm developed in Boulder County, just west of the District boundary washing out dirt roads and producing heavy hail. Heavy stroms developed in southern Douglas County and Jefferson County.

  X

 

 

  X

 

 

  X

  X

26

29-JUL 0.51" 0.51" 1.29"  Table  Map

M-1 issued for Jefferson Co, Douglas Co, Arapahoe Co, City of Aurora and Adams Co.

M-A issued for Boulder County.

Moderate to heavy storms observed in Douglas County and Boulder County.

 

  X

 X

 X

 

 

X

  X

27

30-JUL 1.81" 2.38" 2.20"  Table  Map

M-1 issued for Adams Co, DIA and Broomfield Co, Denver Co, Arapahoe Co and City of Aurora.

M-A issued for Boulder Co.

M-2 issued for Douglas Co, Jefferson Co.

Red Flood Alert issued for Adams Co, DIA, Arapahoe Co, City of Aurora, Denver Co and Douglas Co.

Severe storms and heavy rainfall observed in Douglas County.

  X

 X

 

 

  X

28

31-JUL 0.08" 0.01" 0.32"  Table  Map

M-2 issued for Douglas Co.

Heavy rainfall was observed in the Hayman burn area of Douglas County.

 

 

 

 

 

 

 

 

29

01-AUG 0.67" 0.76" 1.23"  Table  Map

M-1 issued for the entire District.

M-A issued for Boulder Co.

Red Flood Alert issued for Adams Co and DIA.

M-2 issued for Douglas Co and Jefferson Co above 6,500 feet.

M-B issued for Boulder Co above 6,500 feet.

Moderate to heavy rainfall observed in western portions of the District.

  X

 

 

  X

30

04-AUG 1.34" 1.30" 1.96"  Table Map 

M-1 issued for entire District.

Red Flood Alert issued for Jefferson Co, Broomfield Co, Douglas Co, Adams Co, Arapahoe Co, City of Aurora and Denver Co.

Strong storm cells producing heavy rainfall observed in Jefferson County, Broomfield County and Douglas County.

 

31

06-AUG 0.75" 0.86" 1.57"  Table  Map

M-1 issued for Jefferson Co, Broomfield Co, Adams Co, Denver Co, DIA, Arapahoe Co, and City of Aurora.

M-A issued for Boulder Co.

Red Flood Alert issued for Jefferson Co, Adams Co and DIA.

Heavy rainfall was observed in Jefferson Co, Boulder Co and Adams Co.

 

32

08-AUG 1.34" 1.63" 1.63"  Table  Map

M-1 issued for Jefferson Co, Douglas Co, Arapahoe Co and City of Aurora.

Red Flood Alert issued for Douglas Co, Arapahoe Co, City of Aurora and Jefferson Co.

Heavy rainfall observed in Jefferson Co and Douglas Co.

 

 

 

33

09-AUG 0.91" 1.11" 1.57"  Table  Map

M-1 issued for Jefferson Co, Broomfield Co, Adams Co, Denver Co and DIA.

M-A issued for Boulder Co.

Red Flood Alert issued Boulder Co, Adams Co, Jefferson Co.

  X

 

 

 

34

15-AUG 0.51" 0.55" 1.24"  Table  Map

M-1 issued for Adams Co and Broomfield Co.

M-A issued for Boulder Co.

Red Flood Alert issued for Adams Co.

Moderate storms observed in the northeastern portions of the District.

 X

 

 

 

 

35

16-AUG 0.94" 1.21" 1.84"  Table  Map

M-1 issued for Douglas Co, Arapahoe Co, City of Aurora, Jefferson Co, Broomfield Co and Adams Co.

M-A issued for Boulder Co.

Red Flood Alert issued for Boulder Co, Broomfield Co and Adams Co.

Heavy precipitation observed with an intense storm in central Douglas County along I-25 south of Castle Rock.

Moderate rainfall observed in Boulder County.

  X

 

 

 

 

36

23-AUG 0.91" 1.01" 1.19"  Table  Map

M-1 issued for Jefferson Co, Broomfield Co, Adams Co, Denver Co, Arapahoe Co, Douglas Co, DIA and City of Aurora.

M-A issued for Boulder Co.

Heavy rainfall observed in southern Douglas County.

 

 

 

 

 

 

 

Maximum 24-hour value

Maximum 24-hour value

Maximum

Radar

estimated

24-hour

precip

   

 

ADAM

ARAP

AURA

BLDR

BROM

DOUG

DENV

JEFF