Comfortable Sunday temps and dew points, shower chance in NW Minnesota
Excessive heat watch Tuesday afternoon through Thursday
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A cool front delivered cooler and drier air late Saturday. We’ll enjoy comfortable temperatures and dew points this Sunday.
Sunday afternoon highs will be in the 80s in roughly the southern half of Minnesota and into west-central Wisconsin:
Twin Cities metro area highs will be mainly in the lower 80s, but a few spots in the metro could be slightly warmer.
Highs in the 70s are expected in much of the northern half of Minnesota and into northwestern Wisconsin. A few spots in northwestern Minnesota could see highs in the upper 60s.
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Sunday afternoon dew points will be mainly in the 50s:
That will be much more comfortable than the steamy dew points in the 70s that blanketed southern and central Minnesota yesterday.
Rain chances mainly north
Parts of northwestern and north-central Minnesota could see scattered showers at times Sunday afternoon. A stray shower could move into northeastern Minnesota by late afternoon.
The National Oceanic and Atmospheric Administration’s North American Mesoscale (NAM) forecast model shows the potential rain pattern from 11 a.m. Sunday to 6 p.m. Sunday:
Hot weather returns Tuesday, lingers into Thursday
Far southern Minnesota will see highs return to the 90s on Monday, then the 90s spread northward Tuesday, with some 100-degree highs in parts of southwestern and south-central Minnesota.
Triple-digit highs are possible Wednesday in roughly the southern third of Minnesota. Dew points will also be rising Tuesday and Wednesday.
The National Weather Service has posted an excessive heat watch for roughly the southern third of Minnesota, plus several western Wisconsin counties, from noon Tuesday to 7 p.m. Thursday:
Here are details of the excessive heat watch:
URGENT - WEATHER MESSAGE National Weather Service Twin Cities/Chanhassen MN 306 AM CDT Sun Aug 20 2023 MNZ054-056-059>070-075>078-085-WIZ023-024-026-201800- /O.EXB.KMPX.EH.A.0001.230822T1700Z-230825T0000Z/ Lac Qui Parle-Chippewa-Wright-Hennepin-Anoka-Ramsey-Washington- Yellow Medicine-Renville-McLeod-Sibley-Carver-Scott-Dakota- Nicollet-Le Sueur-Rice-Goodhue-Steele-St. Croix-Pierce-Pepin- Including the cities of Madison, Montevideo, Monticello, Minneapolis, Blaine, St Paul, Stillwater, Granite Falls, Olivia, Hutchinson, Gaylord, Chanhassen, Chaska, Victoria, Shakopee, Hastings, St Peter, Le Sueur, Faribault, Red Wing, Owatonna, Hudson, River Falls, and Durand 306 AM CDT Sun Aug 20 2023 ...EXCESSIVE HEAT WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH THURSDAY EVENING... * WHAT...Dangerously hot conditions with heat index values up to 110 possible. * WHERE...Portions of central, east central, south central, southeast and west central Minnesota and west central Wisconsin. * WHEN...From Tuesday afternoon through Thursday evening. * IMPACTS...Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. * ADDITIONAL DETAILS...The hottest day looks to be Wednesday but that still may vary among Tuesday through Thursday. In addition, overnight temperatures will only drop to the lower to middle 70s, providing little relief from the effects of the heat during the nighttime periods. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Be prepared to drink plenty of fluids, stay in an air- conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. This is especially true during warm or hot weather when car interiors can reach lethal temperatures in a matter of minutes.
The excessive heat watch begins Monday afternoon in parts of southwestern Minnesota.
You can hear updated weather information for Minnesota and western Wisconsin on the MPR News network.
Update
A new Updraft will be posted around 10:30 a.m. today. It’ll include a detailed look at the week ahead plus an update on Hurricane Hilary.
Programming note
You can hear my live weather updates on MPR News at 7:35 a.m., 9:35 a.m. and 4:39 p.m. each Saturday and Sunday.
