FTB 09-02-2017: Labor Day Weekend Headline: Late Summer Heat Wave

Issue Date: Saturday, September 2, 2017
Issue Time: 9:30AM MDT

— Flooding is NOT expected today

A disturbance swiftly moved southeastward across Colorado yesterday, paving the way for the recovery of the western North American upper-level ridge (see water vapor image below). And what a recovery it will be! The ridge is expected to strengthen throughout the day, sending temperatures to as much as 15F above normal statewide. Precipitable Water has dropped by 20-30% in the past 24 hours and is now in the 0.5 – 0.75 inch range. Some further drying of the atmospheric column is expected today. Enough moisture will persist for isolated to widely scattered shower and weak thunderstorm activity in the climatologically favored Southeast Mountains and San Juans. However, rain rates are expected to remain well below flood threat levels.

With the mostly sunny and hot weather, please remember to stay hydrated if you are planning on spending significant time outdoors.

Today’s Flood Threat Map

For more information on today’s flood threat, see the map below (hover over threat areas for more details). For Zone-Specific forecasts, scroll below the map.

Zone-Specific Forecasts:

Southeast Mountains, Raton Ridge, Southeast Plains, San Juan Mountains:

Sunny this morning, then turning partly cloudy and very warm with isolated to scattered showers and thunderstorms in the afternoon and early evening. Max 1-hour rain rates up to 0.4 inches. Gusty winds could accompany the strongest cells. Flooding is not expected today.

Primetime: 12PM to 8PM

Front Range, Urban Corridor, Palmer Ridge, Northeast Plains:

Sunny early, then turning partly cloudy and very warm. An isolated shower or weak thunderstorm cannot be ruled out especially in the higher terrain south of I-70. Max 1-hour rain rates up to 0.25 inches. Flooding is not expected today.

Primetime: 1PM to 7PM

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

Sunny early then partly cloudy and hot with temperatures reaching the upper 90s F in the lower elevations. An isolated shower or storm cannot be ruled out especially in southern areas. Max 1-hour rain rates up to 0.2 inches and gusty winds will be possible with the strongest cells. Flooding is not expected today.

Primetime: 1PM to 8PM