| Message 2’s (NWS Flood Watch/Flash Flood Watch) will be extended until noon Friday. 2.0-5.0” of rain has fallen across the District over the past 1-2 days (isolated higher and lower amounts) and another 1.0-3.0” of rain or more is expected this evening and overnight. Non-thunderstorm rain showers on top of saturated ground is resulting in even light to moderate rainfall resulting in excessive runoff that is producing low end nuisance to moderate flood conditions across the District. Rain showers will continue to be persistent overnight with typical rainfall rates of 0.1-0.3” in 60 minutes and upwards of 0.3-0.9” in 60 minutes with isolated higher amounts. Although the intensity of the rain is not heavy compared to thunderstorms the overall amount of rain is producing flooding of local creeks and streams. Additional rainfall will easily runoff and may exacerbate flooding of watercourses further and result in more severe flooding as this unusual rain event continues. Any infrastructure failures may exacerbate flood conditions further and flash flooding may occur unexpectedly. As the low pressure system spinning over E/SE Colorado slowly moves eastward tomorrow rain showers are expected to decrease into the afternoon and conditions will improve but we are 10-16 hours away from significant improvement and conditions may deteriorate further before they improve tomorrow. |
WORST CASE SCENARIO: Very heavy rain showers or a weak to moderate thunderstorm has the potential to produce rainfall amounts of 0.5-1.5" in 30-60 minutes.
| County-specific Quantitative Precipitation Outlook |
Precipitation Time | 60-Minute Rainfall and % Probability |
Message Potential |
|---|---|---|---|
| Plains | |||
| Adams |
Current TO
1159 AM FRI |
0.1" (100%) to 0.3" (75%) to 0.9" (25%) | |
| Arapahoe |
Current TO
1159 AM FRI |
0.1" (100%) to 0.3" (75%) to 0.9" (25%) | |
| Boulder |
Current TO
1159 AM FRI |
0.1" (100%) to 0.3" (70%) to 0.9" (15%) | |
| Broomfield |
Current TO
1159 AM FRI |
0.1" (100%) to 0.3" (70%) to 0.9" (15%) | |
| Denver |
Current TO
1159 AM FRI |
0.1" (100%) to 0.3" (75%) to 0.9" (25%) | |
| Douglas |
Current TO
1159 AM FRI |
0.1" (100%) to 0.3" (75%) to 0.9" (25%) | |
| Jefferson |
Current TO
1159 AM FRI |
0.1" (100%) to 0.3" (70%) to 0.9" (15%) | |
| Foothills above 6500ft | |||
| Boulder |
Current TO
1159 AM FRI |
0.1" (100%) to 0.3" (70%) to 0.9" (15%) | |
| Douglas |
Current TO
1159 AM FRI |
0.1" (100%) to 0.3" (75%) to 0.9" (25%) | |
| Jefferson |
Current TO
1159 AM FRI |
0.1" (100%) to 0.3" (70%) to 0.9" (15%) |
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.