/Issued 10:03 PM CDT, Monday, August 19, 2013/
-Areas in orange are under a heat advisory on Tuesday from 11 AM until 8 PM CDT. This includes the entire Iron Range, North Shore, Arrowhead, Borderland, Brainerd Lakes, I35 corridor in Minnesota, as well as much of Northwestern Wisconsin. The combination of hot temperatures in the low/mid 90s along with dew points of 60-70 degrees will result in peak heat index values between 95 and 105 degrees.
Today’s Weather Summary for Northeast Minnesota and Northwest Wisconsin
A very warm and much more humid day in the Northland under hazy sunshine along with some clouds which were more common before Noon Today. Also saw some showers and thunderstorms over portions of the Northland earlier in the day with 1.00″ of rain reported at International Falls earlier Today. High temperatures were in the 80s with dew points mainly in the 60s to around 70 degrees. Winds were from the south or southwest at 10 to 25 mph.
Forecast Discussion for Northeast Minnesota and Northwest Wisconsin
Short Term Forecast – Confidence: High.
Tonight through Tuesday Night (August 19-20)
Warm and muggy Tonight and Tuesday Night with clear-partly cloudy skies, lows will mainly be in the 60s to lower 70s. Hot temperatures are in store on Tuesday with highs generally in the 90s throughout the Northland with dew points mainly in the 60s which will result in Afternoon heat index values of 95 to as high as 105 degrees. Looks mainly dry during this period, but a cold front will work it’s way into Western Minnesota Tuesday Night and this could touch off a few showers and thunderstorms, mainly in far Western/Northern parts of the Northland. Winds during this period will be out of the SSW at 10 to 25 mph.
Extended Forecast – Confidence: High.
Wednesday through Friday (August 21-23)
A cold front will pass through the Northland from NW-SE on Wednesday, looks like there might be a few showers or thunderstorms in Eastern Minnesota and Northern Wisconsin during the day, although the better chances might end up being a little more to our south depending on how fast this boundary comes through our area. Otherwise this period looks mainly dry and much less humid after Wednesday. High temperatures on Wednesday will be in the 80s with some 90s possible in Northwest Wisconsin and perhaps some 70s in far Northern Minnesota. Highs on Thursday and Friday will be in the 70s and 80s. Lows Wednesday Night and Thursday Night will mainly be in the 50s, but some 40s are certainly possible in the typical cool spots.
Long Range Forecast – Confidence: High.
A large and expanding upper level high pressure ridge is forecast to cover most of the Plains, Upper Midwest and Great Lakes during this period with a SW flow aloft covering the Western U.S. into the Northern Plains. A frontal boundary or two will likely setup near or over the Northern Plains and Upper Midwest this period and that boundary could lead to a few showers or thunderstorms at times from the 24th-29th but the better chances for rain may actually end up west/north of our area. Stay tuned. Above average temperatures are forecast through this period.
5 DAY FORECAST FOR DULUTH/SUPERIOR
*HEAT ADVISORY 11 AM Tuesday until 8 PM CDT Tuesday*
.Tonight… Warm and muggy. Hazy. Clear to partly cloudy. Low 65 to 70. Wind south to southwest at 5 to 15 mph.
.Tuesday… Hot and muggy. Hazy. Mostly sunny. Record or near record high temperatures expected. High 90 to 95. Afternoon heat indices of 95 to around 105 degrees. Wind south to southwest at 10 to 20 mph with gusts to 25 mph. Note: Record high temperature for Tuesday is 89 degrees set in 1976.
Tuesday Night… Warm and muggy. Partly cloudy. Low 65 to 70. Wind southwest at 10 to 20 mph.
.Wednesday… Warm but turning less humid. Partly cloudy. Morning showers or thunderstorms possible. High 82 to 87.
.Wednesday Night… Cooler. Partly cloudy. Low 52 to 57.
.Thursday… Partly cloudy. High 75 to 80.
.Thursday Night… Partly cloudy. Low 50 to 55.
.Friday… Partly cloudy. High 75 to 80.
Normal temperatures for Tomorrow
Sunrise Tuesday: 6:13 AM CDT
Sunset Tuesday: 8:10 PM CDT