textproduct: Glasgow

KEY MESSAGES

LAST UPDATED: 645Z

- A cold front is helping scattered rain showers to develop currently, and this activity is expected to last through this evening. Some sub 40 degree temperatures are expected on Sunday night and Tuesday night. This includes a non zero chance of dropping into the upper 20s in low elevation locations.

- A stronger chance for rain is expected Sunday into Monday night, and at least a wetting rain expected.

DISCUSSION

Tonight into tomorrow night: A low pressure system associated with a cold front is currently advancing through the region. On and off rain showers will slowly progress southeastward before coming to an end after 5 PM today across the north. Lingering showers are expected across the south tonight. A wetting rain (one tenth of an inch of rain or more) is most likely to occur in Phillips and western Valley county from now through noon today.

A shortwave ridge is expected to move in on Saturday night before the next moderate strength trough moves in. On Sunday through Monday night, rainfall totals are expected to range from around 5 hundredths up to 8 tenths of an inch. The higher end of this range exists over Phillips county and areas close to the Canadian border. A Lake Wind Advisory will be considered for breezy conditions on Sunday and Monday for Fort Peck Lake. Nelson Reservoir and Medicine Lake are not part of these advisories, but will still see challenging boating conditions.

Tuesday Moving Forward: A weak ridging pattern is expected to be in place with a brief chance of showers on Wednesday. There is uncertainty on rain amounts, but there is less than 5 hundredths at any given location as of the latest forecast.

FORECAST CONFIDENCE & DEVIATIONS: Increased PoPs and winds through this evening.

There is moderate confidence in rain amounts through Tuesday.

There is moderate to high confidence of wind gusts reaching 30 to 40 mph on Sunday and Monday on Fort Peck Lake.

AVIATION

LAST UPDATED: 0630Z

FLIGHT CAT RANGE: VFR

DISCUSSION: An upper trough affecting the region is allowing rain showers to show up on radar. This activity is expected to slowly push southeastward to affect TAF sites through about 23Z. Cloud heights are expected to stay above 3500 feet AGL and visibilities reduced at most down to 6 miles.

WIND: North at 15 to 20 with gusts to 30 knots through 10Z, decreasing to 7 to 14 knots. Then northwest at 11 to 17 knots after 18Z.

GGW WATCHES/WARNINGS/ADVISORIES

None.