FTB 06-09-2021: Dry Conditions Forecast Statewide

Issue Date: Wednesday, June 9th, 2021
Issue Time: 8:45AM MDT

— Flooding is NOT expected today

There is a lot of fog and cloud cover over the eastern plains to start the day, which is being generated from higher levels of moisture partially associated with the PM storms from yesterday. If you look closely, you can see the North and South Platte River valleys carved out. This cloud cover will likely linger through about midday before it burns off, but that could help to keep high temperatures 5-10F cooler this afternoon over the area. PW values will remain low today with the southwest and westerly flow continuing to pull in a dry and hot air mass over the state. PW was measured at 0.27 inches in Grand Junction this morning, and very low relative humidity values are forecast again. Surface winds should be slightly lower today, so while Elevated fire weather is forecast across the western border, a Red Flag Warning has only been issued for the Colorado River Headwaters (below 7,500 feet).

The strengthening ridge and general dryness east of the Continental Divide will be too much for storm development this afternoon/evening. Denver’s morning sounding measured PW at 0.45 inches and showed very dry levels above 700mb. High moisture will still exist over the eastern border counties, but a strong cap and no lifting mechanism to initiate storms means that precipitation chances are close to zero. Flooding is NOT forecast today.

Today’s Flood Threat Map

For more information on today’s flood threat, see the map below. If there is a threat, hover over the threat areas for more details, and click on burn areas to learn more about them. For Zone-Specific forecasts, scroll below the threat map.

Zone-Specific Forecasts:

Southwest Slope, Northwest Slope, San Juan Mountains, Central Mountains, Northern Mountains, & Grand Valley:

A Red Flag Warning has been issued for the Colorado River Headwaters this afternoon. Southwest winds are forecast to be in the 15 to 25 mph range with gusts up to 45 mph possible. Elsewhere, along the border, fire danger will still be elevated due to dry fuels and low moisture. It will be too dry for any rainfall to develop over the mountains this afternoon. However, as the trough off the California coast starts to move inland today, expect upper level cloud cover to accompany it by mid-afternoon (see Utah/Arizona in above image). High temperatures will reach into the mid to low 90Fs across the valleys/slopes with mid 80Fs for the mountain valleys. Flooding is NOT forecast.

Northeast Plains, Southeast Plains, Southeast Mountains, Front Range, Raton Ridge, San Luis Valley, Palmer Ridge, & Urban Corridor:

The ridge continues to build in strength today, so high temperatures are forecast in the low to mid-90Fs across the I-25 corridor again. Out east, where cloud cover can linger a bit longer, highs will be in the mid to upper 80Fs. If it burns off rather quickly, expect highs around 90F. Low to mid-80Fs are forecast for the mountain valleys. Between the building ridge and dry atmosphere, rainfall chances are close to zero today. No mechanisms to break the cap over the eastern plains where higher instability will exist, so flooding is NOT forecast. Expect an increase in cloud cover over the mountains and adjacent plains overnight as the trough and jet begin to approach the state from the west.