Alert archive / Michigan / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 2, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Apr 10, 2011, 6:45 AM EDT for 4 counties in Michigan. It was in force for 45 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
- Apr 10, 2011, 6:45 AM EDT (10:45 UTC)
- Expired
- Apr 10, 2011, 7:30 AM EDT
- In force
- 45 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Clare County, MI, Isabella County, MI, Mecosta County, MI, Osceola County, MI
The radar
The NCL Michigan radar (KAPX), 115 km from the middle of the area, began a volume at 10:45 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 |
|---|---|---|---|
| Apr 10, 6:45 AM EDT | HAIL 0.5 | Harrison, MI | THE PUBLIC REPORTED HALF INCH HAIL. |
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 00:00Z, 10.8 hours before the alert went out and 178 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
- 898 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 180 m²/s²
- 0-3 km storm-relative helicity
- 215 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
124 WUUS53 KGRR 101045 SVRGRR MIC035-073-107-133-101130- /O.NEW.KGRR.SV.W.0002.110410T1045Z-110410T1130Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GRAND RAPIDS MI 645 AM EDT SUN APR 10 2011 THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CLARE COUNTY IN CENTRAL MICHIGAN... ISABELLA COUNTY IN CENTRAL MICHIGAN... MECOSTA COUNTY IN CENTRAL MICHIGAN... OSCEOLA COUNTY IN CENTRAL MICHIGAN... * UNTIL 730 AM EDT * AT 640 AM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A CLUSTER OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE SCATTERED MOSTLY NORTH OF A BIG RAPIDS TO MT PLEASANT LINE AND MOVING MOVING EAST AT 60 MPH. * LOCATIONS IMPACTED INCLUDE... MOUNT PLEASANT... HARRISON... CLARE... LEROY... MARION... EVART... BARRYTON... MECOSTA... ROSEBUSH... WEIDMAN... FARWELL... HARTWICK TWP... MIDDLE BRANCH TWP... SYLVAN TWP... ORIENT TWP... SEARS... DIGHTON... TUSTIN... PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS CAN PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 4415 8460 4347 8461 4347 8537 4417 8556 TIME...MOT...LOC 1044Z 258DEG 61KT 4417 8464 4372 8503 WIND...HAIL 60MPH 1.00IN $$ MEADE
2 follow-up statements
587 WWUS53 KGRR 101106 SVSGRR SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAND RAPIDS MI 706 AM EDT SUN APR 10 2011 MIC035-073-107-133-101130- /O.CON.KGRR.SV.W.0002.000000T0000Z-110410T1130Z/ OSCEOLA MI-CLARE MI-ISABELLA MI-MECOSTA MI- 706 AM EDT SUN APR 10 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR MECOSTA... ISABELLA...CLARE AND OSCEOLA COUNTIES UNTIL 730 AM EDT... AT 702 AM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A CLUSTER OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING LARGE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE SCATTERED ALONG A LINE EXTENDING CLARE TO TEMPLE...MOVING EAST AT 70 MPH. ADDITIONAL DEVELOPMENT IS POSSIBLE WEST OF THIS LINE. LOCATIONS IMPACTED INCLUDE... MOUNT PLEASANT... HARRISON... CLARE... LEROY... MARION... EVART... BARRYTON... MECOSTA... ROSEBUSH... WEIDMAN... FARWELL... HARTWICK TWP... MIDDLE BRANCH TWP... SYLVAN TWP... ORIENT TWP... SEARS... DIGHTON... TUSTIN... PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS CAN PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 4415 8460 4347 8461 4347 8537 4417 8556 TIME...MOT...LOC 1104Z 258DEG 61KT 4424 8418 4379 8457 WIND...HAIL 60MPH 1.00IN $$ HOVING
918 WWUS53 KGRR 101126 SVSGRR SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAND RAPIDS MI 726 AM EDT SUN APR 10 2011 MIC035-073-107-133-101135- /O.EXP.KGRR.SV.W.0002.000000T0000Z-110410T1130Z/ OSCEOLA MI-CLARE MI-ISABELLA MI-MECOSTA MI- 726 AM EDT SUN APR 10 2011 ...THE SEVERE THUNDERSTORM WARNING FOR MECOSTA...ISABELLA...CLARE AND OSCEOLA COUNTIES WILL EXPIRE AT 730 AM EDT... THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE WARNED AREA. LAT...LON 4415 8460 4347 8461 4347 8537 4417 8556 TIME...MOT...LOC 1125Z 258DEG 61KT 4431 8369 4386 8409 $$ HOVING
The office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 10, 4:15 AM EDT | Small Craft Advisory | GRR | 35 hr | |
| Apr 10, 4:38 AM EDT | Special Weather Statement | GRR | Lake, Mason, Osceola | 67 min |
| Apr 10, 5:22 AM EDT | Special Weather Statement | GRR | Clare, Isabella, Lake, Mecosta, Osceola | 53 min |
| Apr 10, 6:07 AM EDT | Severe Thunderstorm Warning | GRR | Clare, Isabella, Mecosta, Osceola | 38 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 2011Every severe thunderstorm warning 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.