Alert archive / Michigan / Tornado Warnings in 2011
Tornado Warning 12, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this tornado warning at Jun 21, 2011, 6:26 PM EDT for Allegan County, Michigan. It was in force for 34 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
- Jun 21, 2011, 6:26 PM EDT (22:26 UTC)
- Expired
- Jun 21, 2011, 7:00 PM EDT
- In force
- 34 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
County Allegan County, MI
The radar
The Grand Rapids radar (KGRR), 31 km from the middle of the area, began a volume at 22:29 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 |
|---|---|---|---|
| Jun 21, 6:41 PM EDT | HAIL 0.7 | Dorr, MI |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 21, 4:57 PM EDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 10.4 hours before the alert went out and 195 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
- 874 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 504 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 88 m²/s²
- 0-3 km storm-relative helicity
- 110 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.3
The text
As transmitted, in the capitals the NWS used until 2016.
212 WFUS53 KGRR 212226 TORGRR MIC005-212300- /O.NEW.KGRR.TO.W.0012.110621T2226Z-110621T2300Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE GRAND RAPIDS MI 626 PM EDT TUE JUN 21 2011 THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A * TORNADO WARNING FOR... NORTH CENTRAL ALLEGAN COUNTY IN SOUTHWEST MICHIGAN... * UNTIL 700 PM EDT * AT 625 PM EDT...LOCAL LAW ENFORCEMENT REPORTED A TORNADO NEAR THE HOPKINS AREA. DOPPLER RADAR SHOWED THIS TORNADO MOVING NORTHEAST AT 30 MPH. THE WARNING INCLUDES AREAS SURROUNDING THESE LOCATIONS... MOLINE... BURNIPS... HOPKINS... DORR... DIAMOND SPRINGS... MONTEREY... PRECAUTIONARY/PREPAREDNESS ACTIONS... TO REPEAT...A TORNADO IS ON THE GROUND. TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING OBJECTS. && LAT...LON 4277 8590 4277 8558 4257 8576 4262 8595 TIME...MOT...LOC 2226Z 228DEG 28KT 4268 8581 $$ HOVING
4 follow-up statements
989 WWUS53 KGRR 212235 SVSGRR SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAND RAPIDS MI 635 PM EDT TUE JUN 21 2011 MIC005-212300- /O.CON.KGRR.TO.W.0012.000000T0000Z-110621T2300Z/ ALLEGAN MI- 635 PM EDT TUE JUN 21 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR NORTH CENTRAL ALLEGAN COUNTY UNTIL 700 PM EDT... AT 634 PM EDT...LOCAL LAW ENFORCEMENT REPORTED A POSSIBLE TORNADO. THIS TORNADO WAS LOCATED 5 MILES NORTHWEST OF WAYLAND...MOVING NORTHEAST AT 30 MPH. LOCATIONS IMPACTED INCLUDE... MOLINE... BURNIPS... HOPKINS... DORR... GREEN LAKE... MONTEREY... PRECAUTIONARY/PREPAREDNESS ACTIONS... TO REPEAT...A TORNADO IS ON THE GROUND. TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING OBJECTS. && A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT TUESDAY EVENING FOR SOUTHWESTERN MICHIGAN. LAT...LON 4264 8588 4277 8590 4277 8558 4257 8576 TIME...MOT...LOC 2235Z 228DEG 28KT 4272 8572 $$ JK
014 WWUS53 KGRR 212238 SVSGRR SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAND RAPIDS MI 638 PM EDT TUE JUN 21 2011 MIC005-212300- /O.CON.KGRR.TO.W.0012.000000T0000Z-110621T2300Z/ ALLEGAN MI- 638 PM EDT TUE JUN 21 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR NORTH CENTRAL ALLEGAN COUNTY UNTIL 700 PM EDT... AT 634 PM EDT...THE PUBLIC REPORTED A POSSIBLE TORNADO. POWER FLASHES WERE REPORTED NORTH OF HOPKINS. THIS TORNADO WAS LOCATED 5 MILES WEST OF WAYLAND...MOVING NORTHEAST AT 30 MPH. LOCATIONS IMPACTED INCLUDE... MOLINE... BURNIPS... HOPKINS... DORR... GREEN LAKE... MONTEREY... PRECAUTIONARY/PREPAREDNESS ACTIONS... TO REPEAT...A TORNADO IS ON THE GROUND. TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING OBJECTS. && A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT TUESDAY EVENING FOR SOUTHWESTERN MICHIGAN. LAT...LON 4264 8588 4277 8590 4277 8558 4257 8576 TIME...MOT...LOC 2238Z 228DEG 28KT 4270 8572 $$ JK
803 WWUS53 KGRR 212251 SVSGRR SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAND RAPIDS MI 651 PM EDT TUE JUN 21 2011 MIC005-212300- /O.CON.KGRR.TO.W.0012.000000T0000Z-110621T2300Z/ ALLEGAN MI- 651 PM EDT TUE JUN 21 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHEASTERN ALLEGAN COUNTY UNTIL 700 PM EDT... AT 647 PM EDT...THE PUBLIC REPORTED A POSSIBLE TORNADO. THIS STORM WAS LOCATED NEAR WAYLAND...MOVING NORTHEAST AT 30 MPH. LOCATIONS IMPACTED INCLUDE... MOLINE... DORR... PRECAUTIONARY/PREPAREDNESS ACTIONS... TO REPEAT...A TORNADO IS ON THE GROUND. TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING OBJECTS. && A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT TUESDAY EVENING FOR SOUTHWESTERN MICHIGAN. LAT...LON 4277 8579 4277 8558 4259 8574 4268 8581 TIME...MOT...LOC 2251Z 230DEG 25KT 4274 8564 $$ JK
801 WWUS53 KGRR 212257 SVSGRR SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAND RAPIDS MI 657 PM EDT TUE JUN 21 2011 MIC005-212307- /O.EXP.KGRR.TO.W.0012.000000T0000Z-110621T2300Z/ ALLEGAN MI- 657 PM EDT TUE JUN 21 2011 ...THE TORNADO WARNING FOR NORTHEASTERN ALLEGAN COUNTY WILL EXPIRE AT 700 PM EDT... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY...HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THIS THUNDERSTORM. A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT TUESDAY EVENING FOR SOUTHWESTERN MICHIGAN. LAT...LON 4277 8579 4277 8558 4259 8574 4268 8581 TIME...MOT...LOC 2257Z 230DEG 25KT 4276 8559 $$ JK
The office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 5:39 AM EDT | Special Weather Statement | GRR | Newaygo | 81 min |
| Jun 21, 4:20 PM EDT | Special Weather Statement | GRR | Ottawa | 40 min |
| Jun 21, 4:31 PM EDT | Severe Thunderstorm Warning | GRR | Muskegon, Ottawa | 59 min |
| Jun 21, 5:29 PM EDT | Areal Flood Advisory | GRR | Muskegon, Ottawa | 18 hr |
| Jun 21, 5:29 PM EDT | Severe Thunderstorm Warning | GRR | Kent, Muskegon, Ottawa | 61 min |
| Jun 21, 5:39 PM EDT | Special Marine Warning | GRR | 2 hr | |
| Jun 21, 5:41 PM EDT | Severe Thunderstorm Warning | GRR | Muskegon, Newaygo, Oceana | 64 min |
| Jun 21, 5:59 PM EDT | Severe Thunderstorm Warning | GRR | Allegan, Kent, Ottawa | 61 min |
| Jun 21, 6:03 PM EDT | Severe Thunderstorm Warning | GRR | Van Buren | 43 min |
| Jun 21, 6:14 PM EDT | Areal Flood Advisory | GRR | Allegan, Van Buren | 6 hr |
| Jun 21, 6:20 PM EDT | Flash Flood Warning | GRR | Ottawa | 17 hr |
| Jun 21, 6:25 PM EDT | Severe Thunderstorm Warning | GRR | Kent, Ottawa | 50 min |
| Jun 21, 6:28 PM EDT | Areal Flood Advisory | GRR | Kent | 17 hr |
| Jun 21, 6:37 PM EDT | Severe Thunderstorm Warning | GRR | Calhoun, Kalamazoo | 83 min |
| Jun 21, 6:39 PM EDT | Areal Flood Advisory | GRR | Newaygo, Oceana | 17 hr |
| Jun 21, 6:44 PM EDT | Severe Thunderstorm Warning | GRR | Mecosta, Newaygo | 76 min |
| Jun 21, 6:59 PM EDT | Severe Thunderstorm Warning | GRR | Allegan | 46 min |
| Jun 21, 7:00 PM EDT | Severe Thunderstorm Warning | GRR | Kent, Ottawa | 45 min |
| Jun 21, 7:03 PM EDT | Flash Flood Warning | GRR | Kent | 3 hr |
| Jun 21, 7:21 PM EDT | Areal Flood Advisory | GRR | Calhoun | 4 hr |
| Jun 21, 7:25 PM EDT | Severe Thunderstorm Warning | GRR | Ionia, Montcalm | 65 min |
| Jun 21, 7:59 PM EDT | Severe Thunderstorm Warning | GRR | Gratiot, Isabella, Montcalm | 91 min |
Nearby
Tornado Warnings in Michigan, 2011Every tornado warning in 2011Tornadoes in 2011
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.