Alert archive / Michigan / Tornado Warnings in 2001
Tornado Warning 2, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this tornado warning at Apr 11, 2001, 7:35 PM EDT for Ottawa County, Michigan. It was in force for 40 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Apr 11, 2001, 7:35 PM EDT (23:35 UTC)
- Expired
- Apr 11, 2001, 8:15 PM EDT
- In force
- 40 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Whole counties
County Ottawa County, MI
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 11, 7:40 PM EDT | Hail 1 | Grand Haven, MI | |
| Apr 11, 7:42 PM EDT | Tornado F0 | Coopersville, MI | Trained spotters reported a very brief tornado touchdown. The tornado was classified as an F0, with winds of 40 to 72 m.p.h. The tornado did not produce any damage. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 11, 7:15 PM EDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 12:00Z, 11.6 hours before the alert went out and 225 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 576 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 167 m²/s²
- 0-3 km storm-relative helicity
- 286 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KGRR 112335 TORGRR MIC139-120015- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE GRAND RAPIDS MI 735 PM EDT WED APR 11 2001 THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A * TORNADO WARNING FOR... NORTHERN OTTAWA COUNTY IN SOUTHWEST MICHIGAN * UNTIL 815 PM EDT * AT 733 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO NEAR NUNICA...OR ABOUT 6 MILES EAST OF GRAND HAVEN...MOVING EAST AT 35 MPH. * THE TORNADO IS EXPECTED TO BE NEAR... COOPERSVILLE...EASTMANVILLE AROUND 745 PM EDT LAMONT AROUND 750 PM EDT MARNE AROUND 755 PM EDT * SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE: SPRING LAKE AND FERRYSBURG THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING I7N AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS. MJS/KWG
The office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 11, 6:37 PM EDT | Severe Thunderstorm Warning | GRR | Muskegon, Ottawa | 53 min |
| Apr 11, 6:52 PM EDT | Tornado Warning | GRR | Muskegon | 38 min |
| Apr 11, 7:12 PM EDT | Severe Thunderstorm Warning | GRR | Newaygo | 48 min |
| Apr 11, 7:27 PM EDT | Severe Thunderstorm Warning | GRR | Muskegon, Ottawa | 48 min |
| Apr 11, 7:51 PM EDT | Tornado Warning | GRR | Muskegon | 24 min |
| Apr 11, 7:53 PM EDT | Flash Flood Warning | GRR | Muskegon, Newaygo, Oceana, Osceola | 112 min |
Nearby
Tornado Warnings in Michigan, 2001Every tornado warning in 2001Tornadoes in 2001
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.