textproduct: Glasgow

KEY MESSAGES

- Patchy fog will lingers through this morning.

- Light rain spreads north in the afternoon, continuing into trick or treating hours.

- Precipitation chances will increase on Monday as a frontal system moves across the region.

DISCUSSION

Upper ridge over the northern plains will slowly drift eastward through the weekend as an upper trough digs into the western states. Southwest flow and weak embedded shortwaves will bring periodic chances for rain into the region.

Light rain is expected to slowly move northeast into the region this afternoon and linger overnight as it pushes east. Most locations look to have a damp and chilly Halloween evening. Fog will continue to impact portions of the region through the morning with some locally dense fog, reducing visibility in spots to 2 mile or less.

As the Pacific upper trough moves through the Great Basin, a Colorado low is expected to develop ahead of it. This will spread precipitation northward, and will generally favor the Yellowstone basin for Sunday night into Monday. Splitting in the upper trough near the Canadian boarder will keep cold air from being drawn southward, and result in little to no mixed precipitation or snow.

FORECAST CONFIDENCE & DEVIATIONS:

Adjusted PoPs in the first 24 hours of the forecast by blending for slightly expanded coverage. Otherwise used NBM this cycle.

A lot of uncertainty regarding fog, low cloud and precipitation today.

System for Monday continues to slide southward, which is common, and could result in less precipitation, especially across the north, than expected.

AVIATION

MVFR to IFR with lingering stratus and fog continue through the morning. The afternoon will bring chances for rain which will likely keep the low cloud over the region into the overnight hours.

GGW WATCHES/WARNINGS/ADVISORIES

None.