A cold front moved across the region on the afternoon and evening of the 6th and led to the development of a few strong to severe storms. A weakening complex of storms during the morning hours led to some minor wind damage in the Hayward area.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS DLH wrote it up.
A cold front moved across the region on the afternoon and evening of the 6th and led to the development of a few strong to severe storms. A weakening complex of storms during the morning hours led to some minor wind damage in the Hayward area. The afternoon storms were relatively benign, but did produce some small hail across Price County.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Duluth, MN wrote its last area forecast discussion before the first event at Jul 6, 5:39 AM CST, 4 hours 3 minutes earlier.
Area Forecast Discussion National Weather Service Duluth MN 639 AM CDT Mon Jul 6 2020 .SHORT TERM...(Today through Tuesday) Issued at 501 AM CDT Mon Jul 6 2020 High pressure was located over Lake Superior this morning with a weak warm front observed over northern Minnesota in association with an area of low pressure near Winnipeg. A cold front trails from this low into northwestern Minnesota, southeastern North Dakota and northern South Dakota. Numerous showers and thunderstorms were ongoing from South Dakota into southwestern Minnesota. Additionally, an MCV was located over north-central South Dakota and was slowly moving to the east. Quiet conditions and patchy fog are expected to start this morning. Southwest flow is expected aloft as the upper ridge that has been on place for much of the past week shifts off to the east. The 06.00 GFS and 06.06 NAM are in fairly decent agreement bringing a shortwave from South Dakota this morning and across the Northland this afternoon. Additionally, the MCV across South Dakota is expected to track to the east-northeast through the day, roughly concurrent with the shortwave aloft. This will lead to an increase of showers and storms across the region through the morning hours and into the afternoon. Morning activity is expected to be mainly airmass thunderstorms like have been seen the past few days in association with daytime heating and the lake breeze along with remnant outflow boundaries providing the focus for this activity. Shear today looks better than it has over the past few days with 0-6km shear near 30 knots which will allow for some storm organization with clusters being the most likely mode. The early convection will include a threat of low end severe hail into the early afternoon hours. Forecast soundings are pretty well saturated through the column, so not seeing as much of a wind threat. Heading into the afternoon hours, as the shortwave/MCV/surface cold front begin to move into the area, additional showers and thunderstorms are expected to develop. Forecast soundings show some drying in the midlevels during the afternoon hours along with an increase in DCAPE, so there may be some severe gusts within storms as well during the afternoon and evening hours along with some large hail. The best chances for severe storms this afternoon and evening will be along and south of a Lake Mille Lacs to Mahtowa to Saxon Harbor line. As a cold front works through this evening and tonight, any lingering showers and storms should become confined to mainly northwest Wisconsin and areas along and south of MN 210 as high pressure builds in from the west. Highs today will be a little cooler across northeastern Minnesota with lower 80s expected. Middle to upper 80s will be seen across northwest Wisconsin. Flow will be more zonal aloft by Tuesday morning and the cold front looks to stall out somewhere across Wisconsin and southern Minnesota. The NAM is the furthest south while the GFS and ECMWF keep it across northwest Wisconsin. A few showers and storms will be possible near this front during the afternoon and evening hours as the front slowly drifts to the south and east. This activity will mainly be seen across the southern half of our northwest Wisconsin zones and maybe into our far southern Minnesota zones. Daytime heating will bring CAPE back up around 1000-1500 J/kg plus range and with marginal shear, organized clusters will lead to a low end hail and wind threat. Highs tomorrow will be in the middle to lower 80s with slightly cooler readings near Lake Superior. .LONG TERM...(Tuesday night through Sunday) Issued at 501 AM CDT Mon Jul 6 2020 Surface high pressure will be in place Tuesday night but will shift east during the early morning hours as a warm front begins to move in from the southwest as low pressure moves into the Northern Plains. Showers and thunderstorms will spread into the Northland from the southwest during the early morning hours in association with the warm front. Warm air advection and a low- level jet will lead to a chance for a few strong to severe storms as well from the Brainerd Lakes area to the International Falls/Voyageurs National Park area. Showers and storms will remain possible through the day Wednesday as the area is in the warm sector of this system. The cold front will start moving into western areas during the late afternoon hours and bring additional chances for showers and storms, some of which may be strong to severe from the Brainerd Lakes area to the western Iron Range. The cold front then looks to linger over the region on Thursday before slowly shifting east heading into the evening as another shortwave works through the southwest flow aloft and helps kick it east. This will keep chances for showers and storms in place across much much of the region for Thursday into Thursday night, when yet another shortwave works through. High pressure looks to take over for Friday as northwest flow sets up and the jet dips south of the Northland. A few summertime airmass thunderstorms cannot be ruled out during the afternoon, however. Models then diverge for the weekend with the ECMWF and GEM keeping high pressure in place across the Northland while the GFS brings a cold front through the region. Afternoon chances for airmass showers and storms still look possible should the ECMWF/GEM high pressure solution pan out. Temperatures will remain above normal through the period, but they do look to moderate later into the week and into the weekend and trend a bit closer to normal. Wednesday is shaping up to be the warmest day of the period with upper 80s and 90s over most areas, although the Arrowhead looks to remain cooler in the lower to middle 80s. Lower to middle 80s will then be seen for the remainder of the period, but dewpoints will be mainly in the 50s and lower 60s, so it should not feel as muggy. && .AVIATION...(For the 12Z TAFS through 12Z Tuesday morning) Issued at 639 AM CDT Mon Jul 6 2020 Fog will linger for the next hour or so at HIB, BRD and HYR with VFR conditions returning. There will be chances for showers and storms throughout most of the day, but coverage is expected to be isolated through the morning and early afternoon. Have treated the most likely areas with VCSH and VCTS, but chances will continue into the afternoon and further refinements to timing and coverage will be needed as the day progresses. Expecting conditions to remain VFR through much of the period, but brief reductions in ceilings and visibilities will be possible should a shower or storm move over a terminal. Some fog may again develop before sunrise Tuesday with HIB and HYR seeing the best chances. Have introduced a period of MVFR conditions at both locations with this update. Winds will remain under 10 knots through the periods, but may briefly gust higher in any shower or storm. && .MARINE... Issued at 501 AM CDT Mon Jul 6 2020 Light winds are expected to prevail across western Lake Superior through the period despite a weak cold front moving through. Winds of 5 to 10 knots are expected from the southwest today and Tuesday before becoming light and variable Tuesday night as high pressure passes overhead. Waves are expected to remain 2 feet or less through the period. There will be chances for showers and thunderstorms across all of the nearshore waters today into Tuesday morning before the front moves far enough south by Tuesday afternoon. A few storms may be strong with small hail, gusty winds and cloud-to-water lightning being possible. Patchy fog will also be possible this morning and into this afternoon. && .PRELIMINARY POINT TEMPS/POPS... DLH 84 61 85 63 / 30 30 20 30 INL 83 57 84 61 / 20 10 0 40 BRD 83 61 85 66 / 40 40 20 40 HYR 87 62 86 63 / 40 40 30 20 ASX 89 63 87 63 / 40 30 20 20 && .DLH WATCHES/WARNINGS/ADVISORIES... WI...None. MN...None. LS...None. && SHORT TERM...BJH LONG TERM...BJH AVIATION...BJH MARINE...BJH
Hazardous Weather Outlook National Weather Service Duluth MN 341 AM CDT Mon Jul 6 2020 MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-071030- Koochiching-North St. Louis-Northern Cook/Northern Lake- North Itasca-Central St. Louis-Southern Lake/North Shore- Southern Cook/North Shore-North Cass-South Itasca-South Cass- Crow Wing-Northern Aitkin-South Aitkin-Carlton/South St. Louis- Pine-Douglas-Bayfield-Ashland-Iron-Burnett-Washburn-Sawyer-Price- 341 AM CDT Mon Jul 6 2020 This Hazardous Weather Outlook is for portions of northeast Minnesota and northwest Wisconsin. .DAY ONE...Today and Tonight There is a chance of severe thunderstorms this afternoon and tonight along the periphery of Lake Superior, including the Twin Ports. Damaging winds, large hail, heavy rain and frequent lightning are the main hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday There is a chance of severe thunderstorms Tuesday and Wednesday across most of northeast Minnesota and northwest Wisconsin. Damaging winds, large hail, heavy rain and frequent lightning are the hazards. Periodic thunderstorms are possible Thursday through Sunday. .SPOTTER INFORMATION STATEMENT... Skywarn spotters may be needed after 2 PM today along the North Shore, through the Twin Ports, and east along the South Shore. LSZ121-140>148-071030- Bayfield to Oak Point WI-Grand Portage to Grand Marais MN- Grand Marais to Taconite Harbor MN- Taconite Harbor to Silver Bay Harbor MN- Silver Bay Harbor to Two Harbors MN-Two Harbors to Duluth MN- Duluth MN to Port Wing WI-Port Wing to Sand Island WI- Sand Island to Bayfield WI-Oak Point to Saxon Harbor WI- 341 AM CDT Mon Jul 6 2020 This Hazardous Weather Outlook is for portions of the Nearshore waters of western Lake Superior. .DAY ONE...Today and Tonight Thunderstorms are possible this afternoon and tonight from Taconite Harbor to the Twin Ports, and east to Saxon Harbor. Damaging winds, large hail, frequent lightning and heavy rain will accompany the strongest storms. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday There is a chance of severe thunderstorms Tuesday and Wednesday. Damaging winds, large hail, heavy rain and frequent lightning are the hazards. Periodic thunderstorms are possible Thursday through Sunday. GSF More information may be obtained at the following web address: http://www.weather.gov/duluth (all lower case)
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
1011 AM CDT MON JUL 6 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0435 PM TSTM WND DMG 5 W INO 46.52N 91.27W
07/05/2020 BAYFIELD WI PUBLIC
CORRECTS TIME OF PREVIOUS TSTM WND DMG
REPORT FROM 5 W INO. TREES DOWN. TIME AND
LOCATION ESTIMATED FROM RADAR. ACTUAL REPORT
WAS CALLED IN AROUND 9 PM.
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
1012 AM CDT MON JUL 6 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0620 PM HAIL 9 ENE COOK 47.92N 92.52W
07/05/2020 E1.25 INCH ST. LOUIS MN PUBLIC
TIME ESTIMATED BY RADAR.
&&
JWPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
1016 AM CDT MON JUL 6 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0415 PM TSTM WND DMG 2 NE ISLAND LAKE 47.03N 92.17W
07/05/2020 ST. LOUIS MN PUBLIC
TREE ON ROADWAY. TIME ESTIMATED BY RADAR.
&&
JWPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
1025 AM CDT MON JUL 6 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0715 PM TSTM WND DMG 11 NNW PALMERS 47.07N 91.96W
07/05/2020 ST. LOUIS MN PUBLIC
PICTURES OF TREES DOWN ALONG BRIAR LAKE
SHORELINE. TIME ESTIMATED FROM RADAR.
&&
JWSpecial Weather Statement National Weather Service Duluth MN 1029 AM CDT Mon Jul 6 2020 WIZ007-008-061545- Sawyer-Washburn- 1029 AM CDT Mon Jul 6 2020 ...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT NORTHEASTERN WASHBURN AND WEST CENTRAL SAWYER COUNTIES... At 1029 AM CDT, an area of strong thunderstorms was near Trego, or 10 miles northeast of Spooner, moving northeast at 30 mph. Pea size hail, heavy downpours, and occasional cloud to ground lightning can be expected with these storms. These storms will be near... Hayward around 1045 AM CDT. Other locations impacted by these storms include Northwoods Beach, Stanberry, Earl, Springbrook, Grindstone Lake, Lac Courte Oreilles, Chief Lake and Lac Courte Oreilles Reservation. Seek shelter inside a sturdy building and away from windows until these storms pass. Get off area lakes and seek shelter on shore in a sturdy shelter or a hard topped vehicle. LAT...LON 4580 9175 4591 9188 4615 9159 4594 9130 TIME...MOT...LOC 1529Z 228DEG 26KT 4590 9171 JDS
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
1040 AM CDT MON JUL 6 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0435 PM TSTM WND DMG 6 WSW INO 46.49N 91.30W
07/05/2020 BAYFIELD WI PUBLIC
TREES DOWN. ON PHANTOM LAKE RD.
&&
JWThe Duluth radar (KDLH), 106 km away, was scanning. The volume nearest the first event began at 15:42 UTC.
3 hail, 1 thunderstorm wind. Local standard time, as filed.
A few small branches and one older tree were brought down by the storms near Hayward.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2020Every state in 2020This day in weather historyWarnings in Wisconsin, July 2020
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 899473, 899470, 899471, 899472.