May and 2023年春季 Saint Cloud 天气 Summary

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May and 2023年春季 Saint Cloud 天气 Summaries

I could hear you groaning all of February, March, and April while digging out the last chunks of 我们创纪录的降雪季节. I could hear even more when our perpetual early March temperatures remain early-March-like, even through late March and all of April. 但是，在5月3日 temperatures finally returned to the 70's. 5月11日，圣. Cloud had only its second 80-degree high and the first in 28 days. 这一转变扭转了局势, as high temperatures were more consistently 在 70's and broke 80 on 9 of the last 11 days. On 5月31日, the high hit 90 (91 degrees) for the first time this summer and with 3 more 90度的天 在 六月的头四天.

热身运动推动了 St. 云的五月平均温度 to 62.5度，6度.比正常高3度. 这是 最温暖的五月初九 在圣. 云记录. That warmth also brought an end to the high precipitation trend of 2023's first four months dry; only 0.5月下降了87英寸.79 inches below average and ranking as 最干燥的5月4日 在圣. 云记录. That's a complete reversal from the 最潮湿的1月至4月9日 (9.97英寸，4英寸.36英寸es above average) and the 28th coldest March-April combination (4.比平均温度低0度).

转机来了, despite the double storm track seen so frequently across the US during the cold season. 这一次, 然而, the northern branch of the steering winds over Canada often ground to a halt with a stalled low in eastern Canada or the Northeastern US and a strong high somewhere between the Intermountain Region and the Great Lakes. The combination of the high and the northwest-to-southeast steering winds along the eastern side of the high kept air mainly sinking, both down the eastern slopes of the Rockies, and over the Canadian Prairie Provinces. 这使空气暖和起来, even far to the north in Alberta and Saskatchewan, meaning there was plenty of warm air to bring into Minnesota. This flow made it hard for Gulf of Mexico high moisture air to make it this far northward. It usually only made it through the High Plains and into Iowa (see red areas, meaning more than 5 May inches on the NWS美国大陆雨量图). There was one heavy rain storm in southern Minnesota during the middle of the month (see Southern Minnesota Flooding 5月10日-14), but most of central and northern Minnesota got missed (see NWS明尼苏达州五月雨量图). That led to periodic high to extreme fire danger in northern and western Minnesota during the month.

The other major weather-related issue during May in Minnesota was the frequent smoke from the 各种各样的野火, both in northern Alberta and Saskatchewan and in Quebec. The cold season weather pattern that produced so much snow 在 northern and mountain US (set to season accumulation on the NWS NOHRSC Continental US snowfall analysis)导致加拿大大部分地区干旱, so the warm weather triggered several early wildfires 在 past two months. Flow from the Canadian Prairies often blew the smoke aloft into the northern US, making skies hazy. 有时, sinking of the air wrapping around the stalled high allowed the smoke plume to drop to the ground, creating outbreaks of serious pollution in Minnesota. The worst outbreak was named by the Minnesota Department of Natural Resources climatology department 5月18日的“烟雾锋”.

St. 云无霜地度过了五月. 有一次死里逃生(5月3日的最低气温为33度), 在这种情况下, the wet ground helped to moisten the drier air (originally with dew points 在 20's) enough to avoid a frost. So, the apparent last frost came on 4月26日, two weeks earlier than average (see below). 当这一切发生的时候, May's warmth helped to kick-start the degree days totals for the growing season after the slow start due to the spring cold and wetness.

The dry May has actually offset much of the wet start to the year. For the growing season, usually thought of as from April on, St. 云现在是1.落后66英寸(总共4英寸).61 inches; average 6.27英寸). 即使是2023年的10场比赛.84英寸只是1.比平均9英寸高54英寸.27英寸. From a ground water standpoint, we were fortunate that some of the snow melt crept into the ground. 然而, the winter months are the worst months to be way ahead on precipitation, since these are the driest months of the year. That's because warm air can hold a lot more water vapor than cold air (ability of the air to store water vapor roughly doubles for every 18 degree increase 在 normal range of temperatures). 这和。没有任何关系 降水是雪 and being piled high in our faces this season. 所以，这个干燥的可能花费2.79英寸的4.32 inches we were ahead of the annual total. 这也是为什么草是棕色的, and some of Minnesota is listed as being short on precipitation (see 最新的美国干旱监测).

St. Cloud's average temperature was for meteorological spring (March 1 through 5月31日) is 44.8度，1.比平均水平高9度.

There was no snowfall in May (seriously!)，但这仍然意味着27.9 inches during the meteorological spring, mostly fueled by March's 23.5英寸(3月4日最大雪). 这是 有史以来第9个多雪的春天