Michigan, 2023Excessive Heat and Heat in Michigan, September 3 to 4, 2023
September 3 to 4, 2023 · NWS MQT · 7 events in 6 counties and zones
An anomalously hot air mass being drawn into the region on southerly winds resulted in excessive heat indices exceeding 100F across portions of Upper Michigan on the 3rd and 4th.
Every event with a place to put it; 7 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
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- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 7
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.
An anomalously hot air mass being drawn into the region on southerly winds resulted in excessive heat indices exceeding 100F across portions of Upper Michigan on the 3rd and 4th.
Heat, Marquette
- When
- September 3, 1:00 PM EST to 3:00 PM EST
- Where
- Marquette forecast zone
- Reported by
- Mesonet
- Coordinates
- 46.663, -87.573 (the zone’s center; the record gives no point)
Heat indices ranged between 100 and 105 degrees across much of Marquette County.
Heat, Northern Houghton
- When
- September 3, 1:00 PM EST to 3:00 PM EST
- Where
- Northern Houghton forecast zone
- Reported by
- Mesonet
- Coordinates
- 46.992, -88.652 (the zone’s center; the record gives no point)
Heat indices were around 100 degrees across much of northern Houghton County.
Heat, Southern Houghton
- When
- September 3, 1:00 PM EST to 3:00 PM EST
- Where
- Southern Houghton forecast zone
- Reported by
- Mesonet
- Coordinates
- 46.992, -88.652 (the zone’s center; the record gives no point)
Heat indices were around 100 degrees across much of northern Houghton County.
Heat, Baraga
- When
- September 3, 2:00 PM EST to 5:00 PM EST
- Where
- Baraga forecast zone
- Reported by
- Mesonet
- Coordinates
- 46.700, -88.352 (the zone’s center; the record gives no point)
Heat indices across Baraga County ranged from 100 to 105 degrees.
Heat, Ontonagon
- When
- September 4, 1:00 PM EST to 3:00 PM EST
- Where
- Ontonagon forecast zone
- Reported by
- Mesonet
- Coordinates
- 46.778, -89.305 (the zone’s center; the record gives no point)
Heat indices reached near 100 degrees across much of Ontonagon County.
Heat, Alger
- When
- September 4, 1:00 PM EST to 3:00 PM EST
- Where
- Alger forecast zone
- Reported by
- Mesonet
- Coordinates
- 46.451, -86.548 (the zone’s center; the record gives no point)
Heat indices reached near 100 degrees over portions of Alger County.
Excessive Heat, Marquette
- When
- September 4, 1:00 PM EST to 3:00 PM EST
- Where
- Marquette forecast zone
- Reported by
- Mesonet
- Coordinates
- 46.663, -87.573 (the zone’s center; the record gives no point)
Heat indices reached between 104 and 111 degrees across much of Marquette County on the afternoon of the 4th. The high temperature at the NWS Marquette office reached 95 degrees which was not only a record high for the date but also the highest September temperature ever, breaking the previous monthly high of 93 degrees set on September 9, 2002.
- Heat
- Heat below excessive heat criteria that still caused deaths, injuries or significant impacts.
- Excessive Heat
- Heat at or above the local excessive heat warning criteria, or heat that caused deaths.
After NWS Directive 10-1605, the rules offices file Storm Data by.
- Rip Currents in New Jersey, September 3, 20233 deaths · 12 injured · 3 events
- Heat in Nevada, September 3, 20231 death · 1 event
- Rip Current in Michigan, September 3, 20231 death · 1 event
- Rip Current in Delaware, September 3, 20231 death · 1 event
- Hail and Damaging Wind in Texas, September 3, 2023$2,000 · 1.25 in hail · 3 events
- Damaging Winds in Montana, September 3, 202352 kt wind · 3 events
- Damaging Winds in Washington, September 3, 2023$3,000 · 2 events
- Wildfire in Wisconsin, September 3 to 5, 20231 event
- Excessive Heat in Minnesota, September 3, 20231 event
- Flash Flood in Idaho, September 3, 20231 event
- Marine Thunderstorm Wind in Gulf of Mexico, September 3, 20231 event
- Damaging Wind in South Dakota, September 3, 202356 kt wind · 1 event
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: 1131716, 1131717, 1131718, 1131712, 1131720, 1131721, 1131722.