FTB 05-15-2019: Another Hot, Spring Day with Isolated PM Storms

Issue Date: Wednesday, May 15th, 2019
Issue Time: 8:20AM MDT

–Flooding is NOT expected today

The water vapor imagery below shows the next trough setting up over the west coast. However, Colorado will spend today under the ridge, which translates to another day of sunshine and above average temperatures across the state. Flow aloft will remain westerly over the eastern Colorado, which will move the mass of dry air marked in the water vapor imagery below into the adjacent plains. This should really limit the measurable rainfall and thunderstorm activity over the adjacent plains and far eastern plains this afternoon. This also means some strong gusts may be possible as the storms evaporate.

This afternoon, scattered thunderstorm are expected to pop up over the mountains. Again, only limited residual moisture remains under the ridge, so not expecting much accumulation and forecasting limited coverage of the storms. Activity is forecast to slightly increase over the western high terrains with more southwesterly flow aloft in place. The highest accumulations should be near and along the Continental Divide, though most storms will only produce trace amounts and produce some gusty winds. Flooding is not expected.

Today’s Flood Threat Map

For more information on today’s flood threat, see the map below. For Zone-Specific forecasts, scroll below the map.


Zone-Specific Forecasts:

Front Range, Southeast Mountains, Urban Corridor, Palmer Ridge, Raton Ridge, Southeast Plains, Northeast Plains:

Scattered showers and thunderstorms are expected to pick up again this afternoon over the mountains. Overall, there is a slight decrease in moisture from yesterday, so not expecting much accumulation over the mountains or as the storms move into the adjacent plains. However, some gusts are possible with the evaporation of storms as 25 mph gusts were recorded yesterday and the atmosphere is much drier today. Not much thunderstorm activity is expected over the far eastern plains either, although there is a slight chance for some isolated rainfall along the Colorado/Kansas border with totals up to 0.15 inches possible. Accumulations up to 0.1 inches (west) are forecast though most storms will only produce a sprinkle or two. Storm activity will quickly decrease as the sun sets. Flooding is not forecast.

Primetime: 1:30PM to 9PM

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

Increased cloud cover is expected over the lower elevations of western Colorado this afternoon into tomorrow as the next system starts to move east. For today, high temperatures should be around or slightly above yesterday’s highs. Scattered storms are expected over the higher terrains again this afternoon favoring the Central Mountains. Accumulation is forecast to be under 0.1 inches though some isolated totals around 0.2 inches are feasible near the Divide. Gusts up to 55 mph are also possible as storms evaporate. Flooding is not forecast today.

Primetime: 2PM to 9PM