FTB 05-26-2020: Scattered Storms are Forecast for Northwest Colorado with High Temperatures Increasing Statewide

Issue Date: Tuesday, May 26th, 2020
Issue Time: 9:10AM MDT

— Flooding is NOT expected today

The axis of the trough will be to our east today, which can be seen by the cloud cover over the Midwest and Great Plains in the visible satellite imagery below. This will place Colorado under north/northwest flow, which will allow the small disturbance over Utah/Idaho to reach the northwest corner of the state by early this evening. PW was measured at 0.34 inches this morning in Grand Junction, so even with moisture slightly increasing as the shortwave arrives, storms that pop over the higher terrains of the Northwest Slope, Northern Mountains and Central Mountains are expected to be high-based. This will limit the total accumulation and cause gusty outflow winds; thus, there is no flood threat issued. Across the rest of the state, subsidence will occur behind the trough as the ridge begins to build northward, so rainfall is not expected.

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:

Northwest Slope, Northern Mountains, Central Mountains, Front Range, & Southeast Mountains:

Best chance for storms today will be over the northwest corner of the state favoring the high terrains for development. Coverage will be spotty due to the mediocre moisture available and more virga/wind is forecast than rainfall. A couple weak storms could also form along the Continental Divide as the shortwave passes overheard, but not more than a few sprinkles and cloud cover are anticipated. Max 1-hour rain rates up to 0.10 inches are possible, and flooding is not forecast.

Primetime: 4:30PM to 10:30PM

Urban Corridor, Palmer Ridge, Northeast Plains, Raton Ridge, & Southeast Plains:

Temperatures will be on the rise today with highs forecast in the high 70Fs over the Urban Corridor and low 80Fs for the eastern Plains. It will be mostly clear with some light cloud cover this afternoon over the Urban Corridor. There may be some heavier cloud cover along the Kansas and Nebraska border from the trough, which will help keep temperatures a little cooler than they should be.

Grand Valley, Southwest Slope, San Juan Mountains, & San Luis Valley:

High temperatures will also be increasing in these regions as the ridge begins to build. Highs for the lower elevations are expected to reach high 70Fs to low 80Fs in the valleys. For the mountain towns, 60Fs are forecast. Surface winds may pick up to around 15 mph this afternoon over southern Colorado, but they shouldn’t be widespread enough or last long enough to reach critical fire weather conditions.