textproduct: Glasgow

KEY MESSAGES

- Winds will increase again this afternoon, reaching Lake Wind Criteria. - Cooler than normal conditions are expected to continue. Saturday night expected to be the coolest night.

DISCUSSION

WEATHER PATTERN OVERVIEW:

A broad trough remains over the northern Plains keeping temperatures generally cool for mid-June. Ridge developing along the west coast occasionally with try to push warmer air across the divide, but the persistent and strong Hudson Bay low will maintain the cooler northwest flow.

A shortwave will push through the region on Friday, bringing a chance for showers or thunderstorms, and mixing winds. Lake Wind conditions are marginal but considering the under forecasting of model winds, will go ahead with Advisory for this afternoon.

Colder air slides into the region following the shortwave today, lingering through the weekend. Saturday night should be the coldest night, before western ridge begins to push warmer air across the divide.

FORECAST CONFIDENCE & DEVIATIONS:

Confidence then remains above average for cool and unsettled weather for next several days given the NW flow continuing. Confidence in exact timing, placement, and amount of precipitation remains low to moderate given the mesoscale detail still to be worked out a larger time scales.

Made slights adjustments to the pops and winds for today to account for slight under forecasting of both recently.

AVIATION

VFR. A few showers may move across KGGW and KOLF through 10z. Another band of showers or thunderstorms will spread across the region this afternoon. Brief MVFR conditions are possible with any heavier showers.

GGW WATCHES/WARNINGS/ADVISORIES

Lake Wind Advisory from 11 AM to 9 PM MDT Friday for Central and Southeast Phillips-Central and Southern Valley-Garfield-McCone- Petroleum.