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DISCUSSION

KEY MESSAGES:

- Low clouds and freezing fog are expected into Saturday with a Dense Fog Advisory in effect through 11 AM.

- A warm front is expected to push through this weekend allowing much warmer conditions starting Sunday.

WEATHER PATTERN OVERVIEW: Induced upper ridge has its axis over western Montana which is allowing for the stationary front over the CWA to remain in place with the northeast flow aloft. Temps today were in the teens and 20s over the northern zones with 30s and 40s south.

The upper ridge axis will shift to the Dakotas Saturday night allowing warmer air to flow in. Highs Sunday are expected to be in the 30s north to the 50s south.

As far as the fog is concerned, have diminished the area on the current advisory. With high clouds streaming overhead, it's uncertain what will happen tonight.

A Pacific cold front will move through late Wednesday, so slightly cooler temps are expected later in the period. TFJ

FORECAST CONFIDENCE & DEVIATIONS: Used NBM throughout the period, but did raise temps a bit over the southern zones to blend better with neighboring offices Sunday.

AVIATION

Updated: 2015z

Flight Conditions: LIFR at KGGW and KOLF. IFR at KSDY and KGDV. Improvemnt is possible Saturday.

Discussion: Fog and/or low clouds will continue to affect the airports into early Saturday. Improvement is possible Saturday, first with visibility. TFJ

GGW WATCHES/WARNINGS/ADVISORIES

Dense Fog Advisory until 11 AM MST Saturday for Central and Southeast Phillips-Central and Southern Valley-Daniels-Eastern Roosevelt-Northern Phillips-Northern Valley-Richland-Western Roosevelt.