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October behaving like November

October behaving like November: So far this month most of Minnesota’s climate observers report a monthly mean temperature that is from 5 to 10 degrees F colder than normal. Widespread frosts occurred on October 5-6 and again over October 11-12. Some climate stations set new low daytime maximum temperature records on those dates. At MSP the maximum temperature of 39 degrees F on October 11th tied for the coldest in history, matching that of 1959. In fact on the 11th a number of climate stations reported record cold daytime maximum temperatures in the 30s F. Also many climate stations reported their lowest Wind Chill readings of the fall season so far, with values ranging from the single digits to teens F on October 11th.

Persistent cloudiness and rain have prevailed and brought about an early onset of Seasonal Affective Disorder for some people. Most days have seen rain, or complete cloud cover prevail. Rochester and several other locations have reported at least a trace of ra…
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Wet, cool, and cloudy start to October

Wet, cool, and cloudy start to October:
The month of October has begun with plenty of moisture, measured in terms of rainfall, cloudiness, humidity, and dew points.

Cloudiness has been persistent across much of the state just as it was in the beginning of October 2005. Most days have had complete or near-complete cloud cover, with relative humidity ranging from 70 to 95 percent.

The majority of climate stations in the state have reported rainfall on at least one day and for some on three days so far in October, with many places already seeing a total of over 1 inch (2 to 2.50 inches is the range of normal total precipitation for the month of October in Minnesota).

A strong cold front passage affected the state on Wednesday, October 3rd. The dew point in the Twin Cities hit a remarkable 70°F on that day, setting a record high for the date, and matching only three other years in Twin Cities’ history when the dew point has it 70 degrees F in October, those years being 1962, 2005,…

Preliminary Climate Summary for September 2018

Preliminary Climate Summary for September 2018:
September continued a trend of warmer than normal months. Most climate stations reported a mean monthly temperature from 1 to 3 degrees F warmer than normal. Over 60 climate stations reported at least one day with a 90 degrees F temperature or higher, while Marshall topped the state with a reading of 100 degrees F on the 15th. Many northern communities reported overnight lows in the 20s F the first and third weeks of the month. Brimson reported a low of 26 degrees F on the 22nd, but there may be colder readings yet for this coming weekend.

For the third year in a row Minnesota has seen abundant rainfall during the month of September. Furthermore, this time around it appears that September will be the wettest month on the calendar for many climate stations in the state during 2018. This is unusual, but not unprecedented. For south-central and southeastern counties September of 2018 will rank among the wettest five in history. …

Another round of heavy rain

Another round of heavy rain: Last week a slow-moving Hurricane Florence brought 20-30 inches of rainfall to portions of North and South Carolina. So in this context, our Minnesota rainfall recently is relatively minor. But Wet is Wet. This week, a slow moving, almost stalled warm front boundary along the Iowa-Minnesota border brought consistent and sometimes heavy doses of rainfall to the southern counties of the state. Many climate stations reported from 3 to 6 inches of rainfall over the Monday-Thursday period (September 17-20), with some stations setting new daily rainfall records. Minneapolis Crystal Airport reported over 7.5 inches of rain this week. For the month of September so far many parts of southern Minnesota have seen 6-9 inches of rainfall. In southeastern Minnesota both Winona and Elgin have reported over 9 inches of rain.

Some of the more recent new daily rainfall records set on Wednesday included:
2.37 inches at Lake Wilson
2.22 inches at Marshall
2.07 inches…

A look at the climate for 2018 so far for Minnesota

A look at the climate of 2018 so far for Minnesota: On a statewide basis we just concluded the 12 warmest June-August period in state history. In addition it was the 24th wettest summer back to 1895, but with great disparity, notably surplus rainfall in the south and deficit rainfall in the northwest.

Also on a statewide basis the first 8 months of the year averaged only about 1°F above normal, but it was the 4th year in a row, and 15 out of the last 20 years that the first 8 months of the year have produced an above average statewide temperature. In addition the first 8 months of 2018 brought a statewide average precipitation about two-thirds of an inch above normal, the 9th consecutive year this has happened.

So, when we talk about Minnesota getting warmer and wetter with each passing decade, it appears that the year 2018 will follow that trend line.
Gusty winds: The month of September is not known as one of Minnesota’s windiest months, but the last three days have brought a go…