Alert archive / Michigan / Tornado Warnings in 2018
Tornado Warning 2, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this tornado warning at Sep 1, 2018, 7:27 PM EDT for Calhoun County, Michigan. It was in force for 48 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Sep 1, 2018, 7:27 PM EDT (23:27 UTC)
- Expired
- Sep 1, 2018, 8:15 PM EDT
- In force
- 48 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.0 in
County Calhoun County, MI
The radar
The Grand Rapids radar (KGRR), 94 km from the middle of the area, began a volume at 23:26 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 1, 7:28 PM EDT | TSTM WND DMG | 4 Sw Burlington, MI | TREE DOWN ON NORTH BROADWAY STREET JUST NORTH OF THE BRANCH COUNTY LINE IN UNION CITY. TIME ESTIMATED FROM RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 11.5 hours before the alert went out and 146 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
- 214 J/kg
- Mixed-layer CIN
- -143 J/kg
- Mixed-layer LCL
- 1058 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- -12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
381
WFUS53 KGRR 012327
TORGRR
MIC025-020015-
/O.NEW.KGRR.TO.W.0002.180901T2327Z-180902T0015Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Grand Rapids MI
727 PM EDT SAT SEP 1 2018
The National Weather Service in Grand Rapids has issued a
* Tornado Warning for...
Southern Calhoun County in south central Michigan...
* Until 815 PM EDT.
* At 727 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Union City, or 12 miles northwest of Coldwater,
moving east at 20 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This dangerous storm will be near...
Burlington around 735 PM EDT.
Tekonsha around 750 PM EDT.
Albion and Homer around 815 PM EDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4215 8524 4226 8472 4207 8471 4207 8522
TIME...MOT...LOC 2327Z 256DEG 19KT 4208 8514
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
DUKE2 follow-up statements
792
WWUS53 KGRR 012340
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
740 PM EDT SAT SEP 1 2018
MIC025-020015-
/O.CON.KGRR.TO.W.0002.000000T0000Z-180902T0015Z/
Calhoun MI-
740 PM EDT SAT SEP 1 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM EDT FOR
SOUTHEASTERN CALHOUN COUNTY...
At 739 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Burlington, or 10 miles north of Coldwater, moving
east at 25 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Tekonsha around 745 PM EDT.
Homer around 810 PM EDT.
Albion around 815 PM EDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4214 8510 4226 8472 4207 8471 4207 8510
TIME...MOT...LOC 2339Z 266DEG 21KT 4209 8504
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
DUKE809
WWUS53 KGRR 020001
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
801 PM EDT SAT SEP 1 2018
MIC025-020015-
/O.CON.KGRR.TO.W.0002.000000T0000Z-180902T0015Z/
Calhoun MI-
801 PM EDT SAT SEP 1 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM EDT FOR
SOUTHEASTERN CALHOUN COUNTY...
At 801 PM EDT, a severe thunderstorm capable of producing a tornado
was located 6 miles southwest of Homer, or 11 miles northeast of
Coldwater, moving east at 20 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Homer around 815 PM EDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4214 8494 4220 8472 4207 8471 4207 8494
TIME...MOT...LOC 0001Z 269DEG 17KT 4209 8490
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
DUKEThe office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 9:04 AM EDT | Special Weather Statement | GRR | Mason, Muskegon, Oceana | 56 min |
| Sep 1, 9:59 AM EDT | Special Weather Statement | GRR | Muskegon, Oceana, Ottawa | 61 min |
| Sep 1, 11:07 AM EDT | Areal Flood Advisory | GRR | Muskegon | 6 hr |
| Sep 1, 12:43 PM EDT | Flood Watch | GRR | Allegan, Barry, Calhoun, Clare, Clinton, Eaton and 17 more | 18 hr |
| Sep 1, 1:58 PM EDT | Special Weather Statement | GRR | Barry, Eaton | 2 hr |
| Sep 1, 2:55 PM EDT | Special Weather Statement | GRR | Jackson | 50 min |
| Sep 1, 6:01 PM EDT | Special Weather Statement | GRR | Calhoun | 44 min |
| Sep 1, 6:28 PM EDT | Special Weather Statement | GRR | Kalamazoo | 47 min |
| Sep 1, 6:34 PM EDT | Severe Thunderstorm Warning | GRR | Allegan, Barry, Kalamazoo | 41 min |
| Sep 1, 6:47 PM EDT | Special Weather Statement | GRR | Jackson | 88 min |
| Sep 1, 6:55 PM EDT | Special Weather Statement | GRR | Ingham | 65 min |
| Sep 1, 6:56 PM EDT | Tornado Warning | GRR | Barry, Kalamazoo | 20 min |
| Sep 1, 7:21 PM EDT | Severe Thunderstorm Warning | GRR | Calhoun | 54 min |
| Sep 1, 7:39 PM EDT | Severe Thunderstorm Warning | GRR | Ingham | 29 min |
| Sep 1, 7:48 PM EDT | Severe Thunderstorm Warning | GRR | Jackson | 42 min |
| Sep 1, 7:53 PM EDT | Tornado Warning | GRR | Mecosta | 37 min |
Nearby
Tornado Warnings in Michigan, 2018Every tornado warning in 2018Tornadoes in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.