An area of low pressure over southern Manitoba the morning of the 15th moved to near southern Hudson Bay by the morning of the 16th. A cold front associated with this low moved across the Northland during the afternoon and evening hours of the 15th.
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.
An area of low pressure over southern Manitoba the morning of the 15th moved to near southern Hudson Bay by the morning of the 16th. A cold front associated with this low moved across the Northland during the afternoon and evening hours of the 15th. A warm front had moved through on the previous day brought a warm and unstable airmass in its wake. The cold front then worked with this airmass to create severe storms from northeast Minnesota into northwest Wisconsin and western Lake Superior. Damaging winds accounted for most of the reports with these storms, although there was some marginally severe hail as well.
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 15, 11:47 AM CST, 2 hours 43 minutes earlier.
Area Forecast Discussion National Weather Service Duluth MN 1247 PM CDT Mon Jul 15 2019 .UPDATE... Issued at 1247 PM CDT Mon Jul 15 2019 Updated to lower precipitation chances initially early afternoon, except along the international border where a thunderstorm complex is ongoing. Storms are already beginning to develop along a line to the southwest of this complex, and additional storms may develop ahead of the line due to diurnal heating of the unstable airmass across the region. Introduced severe thunderstorm wording for most of the forecast area. Also updated aviation forecast discussion below. UPDATE Issued at 633 AM CDT Mon Jul 15 2019 Updated for the 12z Aviation Discussion below. && .SHORT TERM...(Today through Tuesday) Issued at 413 AM CDT Mon Jul 15 2019 The concern in the short term will again revolve around thunderstorm chances, their strength, and the amount of rain they produce. The MCV that produces the storms overnight continued to move through northern Wisconsin. There has been some renewed shower/storm development further west over Washburn County and storms have been forming over parts of west central Minnesota as well. MUCAPE values across the Northland remain from 1000-2000 J/KG and with continued moisture transport into the Northland, albeit not very strong, additional showers/storms will likely form and dissipate through the morning. The main threat with these storms will be more heavy rain and small hail due to limited deep layer shear which was less than 30 knots. A stronger shortwave will move through southern Manitoba into northwest Ontario today. This will aid in moving a trough/weak cold front into the Northland later today into tonight. A better chance for showers and storms will occur this afternoon into the evening and much of the guidance is in general agreement on this. MUCAPE values will increase further this afternoon to 3000-4000 J/KG and plenty of moisture will be present with surface dew points in the upper sixties to lower seventies. Deep layer shear will be from 30 to 35 knots, adequate for strong to severe storms given the instability. The CAMS are in decent agreement with two areas of focused convection today/this evening. One is over northwest Wisconsin north of an outflow boundary and in an area of increasing moisture transport. Storms will likely be present through much of the day there. The second area will be along the low level trough/front. Storms are expected to form along this feature this afternoon then move southeast through the Northland through the evening. There is decent agreement most of northern Minnesota will be dry late evening and overnight as the trough/front passes and low level convergence weakens as winds veer to northwest. Storm coverage should decrease across our southern zones as well later tonight but the low level boundary will remain through northwest Wisconsin into southwest Minnesota so we will keep at least some low POPs through the night from the Brainerd Lakes into northern Wisconsin. The low level boundary will remain near or just south of the Northland on Tuesday so there will be a chance for more showers/storms over all but far northern Minnesota through the day. Temperatures today will reach the lower eighties to around ninety. It will be muggy and heat indices will be from 90 to 100 across much of the area. Highs Tuesday will be in the eighties but the humidity will be lower, especially across most of northern Minnesota which will see surface dew points in the lower to middle sixties with some upper fifties in the Arrowhead. .LONG TERM...(Tuesday night through Sunday) Issued at 413 AM CDT Mon Jul 15 2019 Warm and muggy conditions to continue through much of the extended with some additional rounds of showers and storms, some of which could be strong to severe Wednesday afternoon into Thursday morning. The overall pattern continues to show numerous mid-level shortwaves that will translate through the region during the Tuesday night through Thursday night time frame. Similar to the last few days, there continues to be some discrepancies between the forecast guidance, but there is some consensus for a strong system to move through the Northland Wednesday afternoon into Thursday morning, possibly in the form of an MCS. A mid-level shortwave, with some deep large-scale lift, will advance through the region Wednesday afternoon and evening. During the evening hours, a 30 to 40 knot nocturnal low-level jet should be in play to support strong moisture transport, which should lead to the threat for flash flooding Wednesday evening through the overnight hours Thursday morning. Pwat values could range between 1.7" to 2.2", which would be >97% of climatology per the NAEFS precipitable water climate anomalies. Moreover, moderate instability could be possible as well, with values of mixed-layer CAPE in the 2000 to 3000 J/kg range, as well as favorable effective bulk shear values. There is some uncertainty regarding the potential for severe storms and flash flooding as this will depend on the influence of previous storm coverage and convective feedback. Both the 15.00z GFS and ECMWF models have high localized QPF amounts, while the 15.00z NAM has very little in the way of QPF, so it is unclear how this scenario will pan out. Chances for showers and storms will continue for Thursday and early Friday, but the instability doesn't appear to be quite as high as for Wednesday into Thursday morning. Gusty westerly winds are expected on Friday as the region becomes sandwiched between low pressure to the east and high pressure building in from the west, tightening the surface pressure gradient. Some drier conditions could move back in for Friday afternoon through Saturday as the high pressure builds into the region. Heat indices will hover around the mid to upper 80s away from Lake Superior over much of the extended forecast period. Some relief from the heat and humidity is possible over the upcoming weekend, with dew points dipping back into the upper 50s to lower 60s, quite a bit lower than the upper 60s and lower 70s we have been experiencing. High temperatures could fall to closer to seasonal averages, with values in the upper 70s and lower 80s. && .AVIATION...(For the 18Z TAFS through 18Z Tuesday afternoon) Issued at 1247 PM CDT Mon Jul 15 2019 Mainly VFR conditions through early afternoon, but becoming MVFR to IFR at times through the day and into the early evening due to scattered thunderstorms developing along and ahead of a cold front. During storms conditions may become IFR for a period of time with gusty winds possible. As the cold front moves from north to south this evening skies will gradually clear out, with fog developing towards midnight and later at some sites. Went with fog at most sites with MVFR to IFR visibility based on anticipated widespread rainfall coverage. Skies clear out and VFR conditions will prevail for most of the day Tuesday at most sites. Winds southwest gusting to near 20 knots ahead of the cold front today, then northwest 5 to 10 knots this evening after the cold front passes. Becoming calm late night, then a weak northwest to west wind around 5 knots on Tuesday. && .MARINE... Issued at 413 AM CDT Mon Jul 15 2019 The main concern over western Lake Superior today continues to be for chances of strong to severe thunderstorms, mainly late this afternoon through the evening hours. The main threats will be large hail and strong gusty winds in excess of 33 knots, along with frequent cloud-to-water lightning. Aside from the storms, winds will mainly be from the south to southeast today between 5 to 10 knots, becoming more southwesterly this evening. Winds should increase to between 10 to 15 knots along the South Shore this evening. Waves 2 feet or less. Some smaller chances of showers and thunderstorms will be possible for Tuesday, but will mainly be confined to the South Shore. Severe weather is not expected at this time for Tuesday. && .PRELIMINARY POINT TEMPS/POPS... DLH 86 63 85 62 / 50 50 20 30 INL 89 58 82 60 / 90 30 10 30 BRD 90 66 84 67 / 40 40 20 40 HYR 85 64 84 64 / 70 70 30 30 ASX 88 66 84 63 / 60 60 20 30 && .DLH WATCHES/WARNINGS/ADVISORIES... WI...None. MN...None. LS...None. && UPDATE...JJM SHORT TERM...Melde LONG TERM...JTS AVIATION...JJM MARINE...JTS
Hazardous Weather Outlook National Weather Service Duluth MN 432 AM CDT Mon Jul 15 2019 MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-161030- 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- 432 AM CDT Mon Jul 15 2019 This Hazardous Weather Outlook is for portions of northeast Minnesota and northwest Wisconsin. .DAY ONE...Today and Tonight Thunderstorms will occur again today into tonight across the Northland. Thunderstorms this morning will pose mainly a heavy rain and pea to dime size hail threat but storms this afternoon through late evening will be capable of producing large hail, damaging wind, and more heavy rainfall. Heat indices will be from 90 to 100 this afternoon over much of the area. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Thunderstorms will be possible through much of the upcoming week, some strong to severe, especially Wednesday afternoon through Wednesday night. The main threats will be large hail, damaging winds, and frequent lightning. Flash flooding will also be possible Wednesday night. Conditions will remain warm and muggy through the week, with heat indicies approaching 90 degrees for areas away from Lake Superior. .SPOTTER INFORMATION STATEMENT... Skywarn spotters may be needed this afternoon into the late evening. LSZ121-140>148-161030- 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- 432 AM CDT Mon Jul 15 2019 This Hazardous Weather Outlook is for portions of the Nearshore waters of western Lake Superior. .DAY ONE...Today and Tonight Another round of thunderstorms will be possible over western Lake Superior this afternoon and evening, with some storms strong to severe. The main threats will be large hail, strong gusty winds in excess of 33 knots, and frequent cloud-to-water lightning. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Several rounds of thunderstorms are forecast during much of this week. Some storms could be strong to severe, with gusty winds, large hail, and frequent cloud-to-water lightning the main threats. Melde/JTS More information may be obtained at the following web address: http://www.weather.gov/duluth (all lower case)
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</html>The La Crosse radar (KARX), 205 km away, was scanning. The volume nearest the first event began at 20:31 UTC.
4 thunderstorm wind, 2 hail. Local standard time, as filed.
Small branches and leaves were stripped off trees.
Dime to nickel-sized hail fell for about 5 minutes.
A photo was received via social media of quarter-sized hail.
Multiple trees were reported down in Washburn with photos received as well.
A 2-inch branch was broken from a tree in the winds.
A 5-inch diameter dead pine tree was knocked down.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2019Every state in 2019This day in weather historyWarnings in Wisconsin, July 2019
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 2026-10-01. Each event’s entry at NCEI: 843367, 843363, 843365, 843368, 843369, 843371.