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Near Historic Heat for the Growing Season

Near Historic Heat for the Growing Season:

Michelle Margraf of the NOAA-NWS Office in Chanhassen put me onto the near historically warm growing season we have been having in Minnesota so far in 2018. Since May 1st, often considered the beginning of the growing season we can look at temperature patterns since that date in 2018. May was nearly 6 degrees F warmer than normal on a statewide basis, while June was nearly 3 degrees F warmer than normal. So the combination of May-June in 2018 produced the 4th warmest start to the growing season in state history, averaging 4.5 degrees F warmer than normal. Only 1934, 1977, and 1988 were warmer.

Now so far for July the average temperature across the state is nearly 4 degrees F warmer than normal, with extremes of 96 degrees F at Gaylord and 41 degrees F at Brimson. Heat Index values (a measure of warmth which considers both temperature and dew point) have soared up to 105 to 120 degrees F around southern Minnesota already this month. If …
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Wet Start to July Continues a Trend

Wet Start to July Continues a Trend: Through the first six days of July thunderstorms have brought 1 to 3 inches of rain to many parts of the state. On July 3-4 heavy thunderstorms occurred causing some flash flooding, road closures, and ponded crop fields, as well as cancellation or postpone of some 4th of July events. Southwestern Minnesota was especially hard hit with many observers reporting rainfall totals of 3 to 7 inches. A couple of places in Redwood County reported over 7 inches. For many southwestern counties all of this recent rain came on top of getting 8 to 12 inches just last month (June). As a consequence many rivers there are running above flood stage and some roads and bridges remain closed.

On July 3rd Marshall received a new record daily amount of rain with 4.71 inches, while Redwood Falls receive a new record amount of 5.25 inches. Renville also had a record 4.32 inches.

Many areas have also reported strong thunderstorm winds, ranging from 50 to 70 mph. Yo…

Preliminary June Climate Summary

Preliminary June Climate Summary
With the exception of a few northeastern Minnesota counties, June was warmer than normal, ranging from 2 to 5 degrees F above normal. Extremes ranged from 99°F at Marshall (Lyon County) on June 6th (which may be surpassed today, June 29), to 30°F at Brimson (St Louis County) on June 5th. During this warm June, at least 32 daily high temperature records were broken or tied while 51 daily warm minimum temperature records were broken or tied within the state climate network. In addition a number of days brought Heat Index values ranging from 95 degrees F to 105 degrees F due to record or near record high dew points. On Friday, June 29 dew points ranged throughout the 70s F and produced Heat Index Values that ranged up to 110 degrees F, making for the hottest of days across southern Minnesota. On a statewide basis June of 2018 will rank among the warmest 10 historically. For the Twin Cities June 2018 will probably rank just outside the warmest 10 his…

Wet, Warm June Continues

Wet, Warm June Continues:
Despite the recent moderation, temperatures are continuing to average above normal this month. So far this June ranks among the 20 warmest historically on a statewide basis. Last week over Father’s Day weekend many Minnesota climate stations reported record high temperatures. Among those seeing record highs on June 15th were: MSP with 95°F, Amboy with 95°F, Granite Falls with 96°F, and Minnesota City with 91°F.

For Saturday, June 16th a few more high temperature records were set, including 97°F at Marshall, 95°F at St James, 94°F at Redwood Falls and Rosemount, and 93°F at Wells and Owatonna.

Sunday, June 17th brought a couple of more record highs as well with 92°F at Amboy and 91°F at Redwood Falls.

Record high dew points were abundant over Father’s Day weekend as well, ranging from the low to upper 70s F. Thanks to the high water vapor content, the Heat Index values across many parts of southern Minnesota soared and ranged from 95°F to 103°F. MSP s…

Some Perspectives on June Heat

Some Perspectives on June Heat: On a statewide basis 14 of the past 20 Junes have been warmer than normal, four of them ranking among the 20 warmest in state history.

For the Twin Cities June usually brings 2-3 days with temperatures of 90 degrees F or greater. In some areas of northeastern Minnesota June rarely brings a 90 F day, while in western portions of the state 3-4 days of 90 F temperatures are common.

In the Twin Cities June Heat Waves of two-days duration or longer with a Heat Index Value of 95 degrees F or higher, occur about once every four years. The last prolonged June Heat Wave was in 2001 when Heat Index Values of 95 degrees F or greater were measure for five consecutive days. During June of 1931 there were 7 days with a Heat Index Value of 95 F or higher.

Though we have not seen 90 degrees F this month in the Twin Cities, looks like this Friday, Saturday and Sunday will be our first dose of June Heat with 90 F temperatures and dew points approaching 70 degrees…