| Message 1’s have been issued for the entire District, NOT including Douglas County, effective now until 6pm. Message 2’s have been issued for Douglas County, effective now until 6pm. This coincides with the NWS Flood Watch for northeastern Douglas County effective from noon until 6pm. Storms have started to initiate along the foothills at this time and will progress eastward and into the District this afternoon and early evening. Temperatures have not warmed up significantly so far, which should help limit the strength of storms today, however, due to the excessive rain this season, even a moderate shower with rainfall between 0.35-0.45” in 10-20 minutes will produce some LOW IMPACT FLOODING today. The best chance for storms will be from now, through 6pm with skies quickly clearing this evening as drier air races in behind this disturbance from the NW into the evening. Storm motions should be relatively fast today, between 10-15 from NW to SE, hopefully helping limit point rainfall amounts. The biggest threat today will be any storm with moderate to brief rainfall stalling out, or erratic storm movements from storms formed along outflow boundaries. Any persistent moderate to heavy rainfall over 10-20 minutes will likely result in an issuance of LOW IMPACT FLOODING today. |
WORST CASE SCENARIO: A stalled strong thunderstorm, or training of moderate to heavy
showers/thunderstorms will have the potential to produce 1.8” total in under 60 minutes.
| County-specific Quantitative Precipitation Outlook |
Precipitation Time | 30-Minute Rainfall and % Probability |
Message Potential |
|---|---|---|---|
| Plains | |||
| Adams |
Current TO
600 PM SAT |
0.1" (75%) to 0.4" (50%) to 1.2" (25%) | |
| Arapahoe |
Current TO
600 PM SAT |
0.1" (75%) to 0.4" (50%) to 1.2" (25%) | |
| Boulder |
Current TO
600 PM SAT |
0.1" (75%) to 0.4" (50%) to 1.2" (25%) | |
| Broomfield |
Current TO
600 PM SAT |
0.1" (75%) to 0.4" (50%) to 1.2" (25%) | |
| Denver |
Current TO
600 PM SAT |
0.1" (75%) to 0.4" (50%) to 1.2" (25%) | |
| Douglas |
Current TO
600 PM SAT |
0.1" (90%) to 0.4" (60%) to 1.2" (30%) | |
| Jefferson |
Current TO
600 PM SAT |
0.1" (90%) to 0.4" (60%) to 1.2" (30%) | |
| Foothills above 6500ft | |||
| Boulder |
Current TO
600 PM SAT |
0.1" (80%) to 0.4" (60%) to 1.2" (30%) | |
| Douglas |
Current TO
600 PM SAT |
0.1" (90%) to 0.4" (60%) to 1.2" (30%) | |
| Jefferson |
Current TO
600 PM SAT |
0.1" (90%) to 0.4" (60%) to 1.2" (30%) |
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.