Alert archive / Michigan / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 129, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Sep 3, 2026, 3:16 PM EDT for Calhoun County, Jackson County, Michigan. It was in force for 19 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 3, 2026, 3:16 PM EDT (19:16 UTC)
- Expired
- Sep 3, 2026, 3:35 PM EDT
- In force
- 19 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Calhoun County, MI, Jackson County, MI
The radar
The Grand Rapids radar (KGRR), 99 km from the middle of the area, began a volume at 19:16 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 3, 1:59 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 7.3 hours before the alert went out and 118 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1125 J/kg
- Mixed-layer CIN
- -108 J/kg
- Mixed-layer LCL
- 1071 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.6
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Grand Rapids, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 3, 2:32 PM EDT, 44 minutes earlier. Its key messages:
- Showers/Storms Through Late Afternoon, Then Overnight/Friday AM
- Likely Dry Friday Afternoon; Scattered Storms Possible Late
Area forecast discussion, Sep 3, 2:32 PM EDT, 44 minutes before
Area Forecast Discussion National Weather Service Grand Rapids MI 232 PM EDT Thu Sep 3 2026 .KEY MESSAGES... - Showers/Storms Through Late Afternoon, Then Overnight/Friday AM - Likely Dry Friday Afternoon; Scattered Storms Possible Late && .DISCUSSION... Issued at 231 PM EDT Thu Sep 3 2026 - Showers/Storms Through Late Afternoon, Then Overnight/Friday AM Through the end of the afternoon, the most concentrated areas for stronger convection will be near/north of I-96 and east of US 131 where scattered damaging wind gusts and large hail will be possible. In this region, effective shear values of 40-45 kts are present along with SBCAPE of 2000-3000 J/kg. Surface vorticity enhancements along any outflow boundaries could also aid in a rotational component to stronger thunderstorms with a tornado not out of the question especially across central and south central Lower MI. There is a CAM signal for some swaths of convective wind gusts exceeding 60 mph east of US 131 into late afternoon or early evening before ending. Redevelopment of overnight storms is quite likely. This round of storms will be fueled by an increasing LLJ (30-40 kts) over Wisconsin that will move our direction, intersecting a largely stationary boundary over the region. Model sim refs are indicating a few possible outcomes including a QLCS or elongated/training convective event, the latter being more concerning in terms of an urban and poor drainage flood risk. Areas that would be most susceptible to localized flooding overnight and into Friday morning would be along US 10 (where 1"-2" occurred today) as well as the greater Lansing area where several rounds of thunderstorms have occurred. HREF 6 hr PMM rainfall indicates 1"-2" especially near and west of US 131, though max 6 hr QPF from the membership indicates areas of 2"-3" or slightly more. Placement is not certain at this time, and could shift east. In terms of a QLCS risk, there is some signal for this to occur in the 09z-13z Friday time frame. Nam3km and HRRR soundings ahead of this potential feature indicate 400-500 J/kg of CIN, likely indicating strong winds will not mix down to the surface. Hail and heavy downpours/localized flooding would be more likely threats. - Likely Dry Friday Afternoon; Scattered Storms Possible Late The surface boundary in place today looks to slide south toward I-94 and the MI/IN border by late Friday. Subsidence in the wake of morning rain on Friday will likely inhibit convective development Friday afternoon outside of an isolated pop up shower or storm that could occur on any residual outflow boundaries that remain in place during daytime heating. Predictability of these is low. Best indications are scattered showers and thunderstorms could develop late afternoon/evening and into Friday night near and south of a Grand Rapids to Lansing line after sufficient daytime heating. A HRRR sounding near Lansing around 21z indicates quite a bit of DCAPE at 1200 J/kg with fairly substantial 0-3 km shear of 35 kts. An isolated severe thunderstorm cannot be ruled out near and south of GRR to LAN with damaging wind gusts the primary hazard. && .AVIATION /18Z TAFS THROUGH 18Z FRIDAY/... Issued at 153 PM EDT Thu Sep 3 2026 Radar shows abundant convection overspreading Lower MI and it might not be the only round we see during the period. Most of the TAF periods have a prob30 for storms since we need to account for the current convection and another round later tonight that several models continue to show. A few of the storms could be strong to severe this afternoon and overnight. There may be a lull in the convection during this evening. Outside of the storms, expect MVFR fog overnight due to high dewpoints and abundant moisture from recent rain. && .MARINE... Issued at 231 PM EDT Thu Sep 3 2026 Winds and waves should stay below hazardous levels for mariners through the weekend. Mariners should stay abreast of thunderstorm potential from this afternoon into Friday night and have plans to seek safe harbor when necessary. && .GRR WATCHES/WARNINGS/ADVISORIES... MI...None. MARINE...None. && DISCUSSION...Hoving AVIATION...04 MARINE...Hoving
In the hours before
Special weather statement, Sep 3, 10:40 AM EDT, 4 hours 36 minutes before
Special Weather Statement
National Weather Service Grand Rapids MI
1040 AM EDT Thu Sep 3 2026
MIZ067-031515-
Ingham MI-
1040 AM EDT Thu Sep 3 2026
...Strong thunderstorms will impact portions of northeastern Ingham
County through 1115 AM EDT...
At 1039 AM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Perry to near Williamston to near Mason.
Movement was east at 40 mph.
HAZARD...Wind gusts up to 50 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Williamston... Webberville... Bell Oak...
Okemos...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 4256 8414 4266 8447 4278 8430 4278 8416
TIME...MOT...LOC 1439Z 288DEG 34KT 4276 8420 4265 8421 4265 8446
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH
THOMASSpecial weather statement, Sep 3, 11:19 AM EDT, 3 hours 57 minutes before
Special Weather Statement
National Weather Service Grand Rapids MI
1119 AM EDT Thu Sep 3 2026
MIZ037>039-031615-
Osceola MI-Lake MI-Mason MI-
1119 AM EDT Thu Sep 3 2026
...Strong thunderstorms will impact portions of Lake, Osceola and
northern Mason Counties through 1215 PM EDT...
At 1119 AM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Brethren to near Reed City. Movement was
east at 50 mph.
HAZARD...Winds in excess of 40 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Evart... Reed City... Marion...
Luther... Fountain... Free Soil...
Highland... Chase... Hersey...
Le Roy... Tustin... Nirvana...
Wolf Lake... Big Lake... Ashton...
Sears... Irons... Sunrise Lake...
Bristol... Sauble Lakes...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4416 8598 4417 8509 4381 8509 4387 8559
4409 8647 4418 8639
TIME...MOT...LOC 1519Z 287DEG 45KT 4432 8608 4392 8549
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH
THOMASSpecial weather statement, Sep 3, 12:37 PM EDT, 2 hours 39 minutes before
Special Weather Statement
National Weather Service Grand Rapids MI
1237 PM EDT Thu Sep 3 2026
MIZ039-040-045-046-031730-
Isabella MI-Osceola MI-Mecosta MI-Clare MI-
1237 PM EDT Thu Sep 3 2026
...A strong thunderstorm will impact portions of northern Isabella,
southern Clare, southeastern Osceola and northeastern Mecosta
Counties through 130 PM EDT...
At 1237 PM EDT, Doppler radar was tracking a strong thunderstorm 8
miles southeast of Evart, moving east at 25 mph.
HAZARD...Wind gusts up to 50 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Clare... Farwell... Sears...
Five Lakes... Big Lake... Eight Point Lake...
Doc and Tom Lake...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4375 8469 4380 8522 4390 8522 4397 8470
TIME...MOT...LOC 1637Z 266DEG 21KT 4385 8512
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH
THOMASSpecial weather statement, Sep 3, 1:04 PM EDT, 2 hours 12 minutes before
Special Weather Statement
National Weather Service Grand Rapids MI
104 PM EDT Thu Sep 3 2026
MIZ046-031745-
Isabella MI-
104 PM EDT Thu Sep 3 2026
...A strong thunderstorm will impact portions of Isabella County
through 145 PM EDT...
At 104 PM EDT, Doppler radar was tracking a strong thunderstorm near
Lake Isabella, or 6 miles northwest of Mount Pleasant, moving east at
30 mph.
HAZARD...Wind gusts up to 50 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Mount Pleasant... Shepherd... Rosebush...
Lake Isabella... Delwin... Beal City...
Winn... Mount Pleasant Munic...Blanchard...
Weidman...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4346 8492 4347 8508 4375 8509 4372 8461
4347 8461
TIME...MOT...LOC 1704Z 277DEG 27KT 4364 8489
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH
THOMASLocal storm report, Sep 3, 2:48 PM EDT, 28 minutes before
Preliminary Local Storm Report
National Weather Service Grand Rapids MI
248 PM EDT Thu Sep 3 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0241 PM Tstm Wnd Gst 3 NNE Edgemont Park 42.78N 84.58W
09/03/2026 M66 MPH Clinton MI ASOS
ASOS station KLAN Lansing.
&&
NJJLocal storm report, Sep 3, 3:05 PM EDT, 11 minutes before
Preliminary Local Storm Report
National Weather Service Grand Rapids MI
305 PM EDT Thu Sep 3 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0245 PM Tstm Wnd Dmg 1 SE Lansing 42.70N 84.54W
09/03/2026 Ingham MI Storm Chaser
Healthy 6 inch diameter tree down on road.
Time approximate.
&&The office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 2, 10:23 PM EDT | Severe Thunderstorm Warning | GRR | Ingham | 15 min |
| Sep 3, 2:01 AM EDT | Special Weather Statement | GRR | Ingham | 44 min |
| Sep 3, 7:34 AM EDT | Special Weather Statement | GRR | Kalamazoo | 56 min |
| Sep 3, 7:38 AM EDT | Special Weather Statement | GRR | Barry | 67 min |
| Sep 3, 7:52 AM EDT | Special Weather Statement | GRR | Mecosta | 53 min |
| Sep 3, 8:29 AM EDT | Special Weather Statement | GRR | Barry, Eaton | 61 min |
| Sep 3, 8:32 AM EDT | Severe Thunderstorm Warning | GRR | Barry, Eaton | 38 min |
| Sep 3, 9:20 AM EDT | Special Weather Statement | GRR | Eaton, Ingham, Jackson | 55 min |
| Sep 3, 9:35 AM EDT | Severe Thunderstorm Warning | GRR | Clinton, Eaton, Ingham | 43 min |
| Sep 3, 10:40 AM EDT | Special Weather Statement | GRR | Ingham | 35 min |
| Sep 3, 11:19 AM EDT | Special Weather Statement | GRR | Lake, Osceola | 56 min |
| Sep 3, 11:54 AM EDT | Areal Flood Advisory | GRR | Lake, Mason, Osceola | 6 hr |
| Sep 3, 12:37 PM EDT | Special Weather Statement | GRR | Clare | 53 min |
| Sep 3, 1:04 PM EDT | Special Weather Statement | GRR | Isabella | 41 min |
| Sep 3, 1:31 PM EDT | Severe Thunderstorm Warning | GRR | Gratiot, Isabella | 44 min |
| Sep 3, 1:47 PM EDT | Tornado Warning | GRR | Gratiot | 12 min |
| Sep 3, 2:14 PM EDT | Severe Thunderstorm Warning | GRR | Clinton, Gratiot | 46 min |
| Sep 3, 2:36 PM EDT | Severe Thunderstorm Warning | GRR | Calhoun, Jackson | 22 min |
| Sep 3, 2:46 PM EDT | Severe Thunderstorm Warning | GRR | Clinton, Eaton, Ingham | 44 min |
| Sep 3, 3:06 PM EDT | Tornado Warning | GRR | Ingham | 8 min |
| Sep 3, 3:14 PM EDT | Severe Thunderstorm Warning | GRR | Jackson | 46 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 2026Every severe thunderstorm warning in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.