| Message 2’s, Flood Watch, have been issued for areas above 6,000ft in Boulder, Jefferson, Douglas Counties effective from NOW until 11pm this evening. Message 1’s have been issued for the remainder of the District effective from NOW until 11pm this evening. Monsoonal moisture remains over the region today. Not much change to the overall pattern will result in another chance for afternoon showers and thunderstorms with moderate to heavy rainfall. Once again, there will be a slight chance for severe weather, favoring eastern portions of the District. Dewpoints across the District have dropped only a few degrees this morning, still in the mid to upper 50s, and will only mix down to the low/mid 50s as daytime heating initiates convection over the high country west of the District. Once storms make their way into the foothills and onto the plains this afternoon, the District will have between 1.15" - 1.25" of precipitable water (PWAT) available. Combined with slow to stationary storm motion, will lead to an increased chance for localized flooding today. Hail and gusty outflow winds that reach severe thresholds will also be possible with stronger storms. Outflow boundary-driven storm initiation will be possible after the first round of storms today, with potential for lingering thunderstorms around the District remaining through the evening and into the night as an additional round of late evening storms will be possible. |
WORST CASE SCENARIO: A slow-moving strong thunderstorm or a large thunderstorm complex may result in up to 2.5” of rain in 45-60 minutes.
| County-specific Quantitative Precipitation Outlook |
Precipitation Time | 30-Minute Rainfall and % Probability |
Message Potential |
|---|---|---|---|
| Plains | |||
| Adams |
Current TO
1100 PM TUE |
0.3" (75%) to 0.8" (50%) to 1.6" (25%) | |
| Arapahoe |
Current TO
1100 PM TUE |
0.3" (75%) to 0.8" (50%) to 1.6" (25%) | |
| Boulder |
Current TO
1100 PM TUE |
0.3" (75%) to 0.8" (50%) to 1.6" (25%) | |
| Broomfield |
Current TO
1100 PM TUE |
0.3" (75%) to 0.8" (50%) to 1.6" (25%) | |
| Denver |
Current TO
1100 PM TUE |
0.3" (75%) to 0.8" (50%) to 1.6" (25%) | |
| Douglas |
Current TO
1100 PM TUE |
0.3" (75%) to 0.8" (50%) to 1.6" (25%) | |
| Jefferson |
Current TO
1100 PM TUE |
0.3" (75%) to 0.8" (50%) to 1.6" (25%) | |
| Foothills above 6500ft | |||
| Boulder |
Current TO
1100 PM TUE |
0.3" (75%) to 0.8" (50%) to 1.6" (25%) | |
| Douglas |
Current TO
1100 PM TUE |
0.3" (75%) to 0.8" (50%) to 1.6" (25%) | |
| Jefferson |
Current TO
1100 PM TUE |
0.3" (75%) to 0.8" (50%) to 1.6" (25%) |
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.