Sunday, May 28, 2017

Occasional showers through Tuesday (Much cooler high temps Mon-Tue) Warming up to around 70 Wednesday

/Issued 7:23 PM CDT, Sunday, May 28, 2017/

Source:  http://weather.cod.edu/satrad/exper/












Source:  http://weather.cod.edu/satrad/

Water vapor satellite loop from late Sunday afternoon, May 28, 2017.
















Temperature departure map for the week of May 21, 2017.  Source:  http://mrcc.isws.illinois.edu/




















Precipitation departure map for the week of May 21, 2017.  Source:  http://mrcc.isws.illinois.edu/




















Local Storm Reports for May 28, 2017
Source:  http://www.weather.gov/dlh/

Note:  These are additional storm reports from this afternoon

*6:40 PM:  HAIL.  0.25 inch.  McGregor, MN 7 N (Aitkin County)

*6:25 PM:  HAIL.  0.50 inch.  Glen, MN 5 NE (Aitkin County)

*4:55 PM:  HAIL.  0.25 inch.  Motley, MN (Cass County)

*3:55 PM:  HAIL.  0.25 inch.  Island Lake, MN 11 NE (St. Louis County)

*3:04 PM:  HAIL.  0.25 inch.  Brainerd, MN (Crow Wing County)

*3:04 PM:  HAIL.  0.25 inch.  Grand Rapids, MN (Itasca County)  Pea size hail covering the ground.

*2:59 PM:  HAIL.  0.25 inch.  East Gull Lake, MN 2 W (Cass County)

*1:35 PM:  HAIL.  0.25 inch.  Hackensack, MN 2 NNE (Cass County)

*1:30 PM:  HAIL.  0.25 inch.  Ashland, WI (Ashland County)

*1:20 PM:  HAIL.  0.25 inch.  Motely, MN (Cass County)

*1:00 PM:  HAIL.  0.50 inch.  Manitowish, WI 1 SSE (Iron County)  Pea to dime sized hail.

*12:15 PM:  HAIL.  0.25 inch.  Rice Lake, MN 4 NW (St. Louis County)  Deck 2/3 covered with pea sized hail.

*12:15 PM:  HAIL.  0.25 inch.  Pine River, MN (Cass County)

*12:13 PM:  HAIL.  0.50 inch.  Drummond, WI 12 W (Bayfield County)

Rainfall reports from May 28, 2017

Note:  Totals listed below are through ~7 PM Sunday evening (May 28)

Two Harbors, MN:  0.92 in
Littlefork, MN:  0.50 in
International Falls, MN:  0.41 in
Ely, MN:  0.34 in
Ashland, WI:  0.33 in
Washburn, WI:  0.32 in
Hayward, WI:  0.28 in
Duluth, MN (Airport)  0.26 in
Clam Lake, WI:  0.19 in
Cook, MN:  0.18 in
Cass Lake, MN:  0.16 in
Isabella, MN:  0.15 in 
Glidden, WI:  0.15 in
Hill City, MN:  0.14 in
Walker, MN:  0.12 in
Silver Bay, MN:  0.12 in

Temperature and precipitation report for Duluth, Minnesota (Airport location)

May 21-27, 2017

High temperatures

5/21:  50 F/-14 degrees below normal
5/22:  54 F/-10 degrees below normal
5/23:  56 F/-8 degrees below normal
5/24:  59 F/-6 degrees below normal
5/25:  65 F/Normal
5/26:  69 F/+4 degrees above normal
5/27:  75 F/+10 degrees above normal

Low temperatures

5/21:  39 F/-3 degrees below normal
5/22:  45 F/+3 degrees above normal
5/23:  46 F/+3 degrees above normal
5/24:  42 F/-1 degree below normal
5/25:  40 F/-3 degrees below normal
5/26:  48 F/+5 degrees above normal
5/27:  47 F/+3 degrees above normal

Total precipitation:  0.33"
Normal:  0.75"
Departure:  -0.42" below normal

Weather Synopsis

High temperatures today were around 10-15 degrees cooler compared to Saturday, and this cooling trend will continue the next few days.  Highs today were in the 50s and 60s under mostly cloudy skies but there was some sun from time to time.  Showers and thunderstorms have been scattered throughout the Northland today as an upper level low/trough drops south into the upper Midwest.  Surface low pressure was located north of Lake Superior late this afternoon with one cold front well to our east but a secondary cold front was approaching from the west/northwest late today.  The lift associated with these features coupled with cold temperatures aloft (H5 temps around -20C) milder temperatures near the surface made the atmosphere unstable which has triggered the storms that have affected parts of the Northland today.  Freezing levels were quite low today so a lot of the storms if they became strong enough did spit out some pea to marble size hail.

Scattered showers and thunderstorms will continue over the Northland tonight although the potential for thunderstorms will probably decrease overnight as instability wanes -- More showers are expected Memorial Day and Tuesday, but much lower instability over the area Monday, so thunderstorms if any do develop should be more isolated compared to what occurred today.

The bigger story Monday and Tuesday will be the temperatures.  850mb temps will drop to -1 and +3 degrees C while surface temperatures fall to well below normal levels once again.  Highs Monday are expected to be in the 50s while highs Tuesday will only be in the 40s and 50s.  Note:  The normal high temperatures on the last few days of May are generally in the upper 60s.

Low temps will be near average thanks to the lingering cloud cover tonight and Monday night.  Lows in the mid 40s to lower 50s tonight, and mainly in the 40s Monday night.

A top 3 coldest high temperature is not forecast in Duluth for Monday or Tuesday as those records are in the low to mid 40s.

 International Falls, however, could have a top 3 coldest high temperature both Monday and Tuesday.  See stats below.

May 29:

46 F (1947)
52 F (2012)
53 F (1989)

May 30:

53 F (1978)
54 F (2015)
55 F (2009)

Tim