/Issued 4:30 PM CDT, Tuesday, May 29, 2018/
Be weather aware this evening as there is potential for some severe weather in portions of the Northland.
Severe Thunderstorm Watch in effect til 8 PM this evening for areas just south of the Northland.
Goes-16 water vapor satellite loop from May 29, 2018. Large upper low/trough covering the northern Rockies and northern Plains today with warm, humid and unstable air east of this system resulting in widespread showers and thunderstorms with some severe weather today in parts of the upper Midwest and central Plains.
*Local Storm Reports for May 28, 2018*
7:25 PM CDT: HAIL. 0.25 inch — 2 NW of Alpha, WI (Burnett County) Accumulation of hail covering fields.
7:15 PM CDT: HAIL. 0.75 inch — 2 S Branstad, WI (Burnett County)
7:02 PM CDT: HAIL. 0.25 inch — 8 ENE of Rock Creek, MN (Pine County)
•3rd warmest low temperature on record for May 28 at Duluth, Minnesota with a low on Monday of 60 degrees. The record warmest low for May 28 is 63 degrees set in 1934.
•3rd warmest low temperature on record for May 28 at Ashland, Wisconsin with a low on Monday of 58 degrees. The record warmest low for May 28 is 62 degrees set in 1934.
•4th warmest high temperature on record for May 28 at Brainerd, Minnesota with a high on Monday of 88 degrees. The record high for May 28 is 95 degrees set 1934 and tied again in 1969 and in 2006. In addition, 3rd warmest low temperature on record for May 28 with a low on Monday of 66 degrees. The record warmest low for May 28 is 70 degrees set in 1969.
•4th warmest high temperature on record for May 28 at Hibbing, Minnesota with a high on Monday of 86 degrees. The record high for May 28 is 89 degrees set in 1969 and tied again in 2006. In addition, 2nd warmest low temperature on record for May 28 with a low on Monday of 59 degrees. The record warmest low for May 28 is 60 degrees set in 1987.
Top 5 Warmest Mays on record for Duluth, Minnesota
1: May 1977 — Average Temperature 57.4 degrees
2: May 1988 — Average Temperature 56.0 degrees
3: May 1998 — Average Temperature 55.9 degrees
4: May 2012 — Average Temperature 55.0 degrees
5: May 1985 — Average Temperature 54.9 degrees
Note: May 2018 (through the 28th) ranks as 2nd warmest May on record with an average temperature of 57.2 degrees. A few days left to go so will see where May 2018 will end up later this week.
Expect occasional rain and thunderstorms in northeast Minnesota and northwest Wisconsin through Thursday. Thunderstorms are most likely this evening, Wednesday afternoon and again Thursday afternoon. Instability won’t be quite as high Wednesday or Thursday as it was today, so the potential for severe thunderstorms is lower, but still can’t rule out a few strong to marginally severe thunderstorms on Wednesday. All thunderstorms will produce lightning. Heavy rainfall is also expected at times, and its possible that there could be some localized flooding that develops in parts of the Northland through Thursday especially in areas that get multiple rounds of thunderstorms.
The storm environment for this evening consists of CAPE values of 1000 to nearly 3000 j/kg along with mid level lapse rates from 6.5 to around 7.0 c/km. Plenty of moisture available for storms with dew points in the 60s and PWATS from 1.25 to 1.75 inches. The negative just like its been for the past few days is the lack of stronger winds aloft and weak wind shear, storms will tend to gust out, weaken, then new storms develop on the the leading edge of the cooler outflow boundaries.
Lows tonight and Wednesday night will be in the 50s and 60s with highs Wednesday in the 70s and 80s, highs Thursday mainly in the 70s.
Near Lake Superior expect much cooler temperatures because of a stronger lake wind which will continue through Wednesday evening. Lows will be in the 40s to around 50 degrees with highs Wednesday in the 50s. Areas of fog could also develop near Lake Superior later tonight into Wednesday.
Normal Temperatures for Duluth for May 30
Sunrise Wednesday: 5:20 AM CDT
Sunset Wednesday: 8:54 PM CDT