Alert archive / Michigan / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 9, NWS Grand Rapids, MI

March 16, 2012Allegan County, Barry County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Mar 16, 2012, 8:01 PM EDT for Allegan County, Barry County, Michigan. It was in force for 29 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Mar 16, 2012, 8:01 PM EDT (00:01 UTC)
Expired
Mar 16, 2012, 8:30 PM EDT
In force
29 min
Issued by
NWS Grand Rapids, MI
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

Counties Allegan County, MI, Barry County, MI

The radar

The Grand Rapids radar (KGRR), 25 km from the middle of the area, began a volume at 00:03 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 nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 0.0 hours before the alert went out and 173 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.

Skew-T log-pSkew-T log-p diagram, Detroit, MI at 00:00Z on 2012-03-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1448 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Detroit, MI at 00:00Z on 2012-03-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1448 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
868 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
98 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

176 
WUUS53 KGRR 170001
SVRGRR
MIC005-015-170030-
/O.NEW.KGRR.SV.W.0009.120317T0001Z-120317T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
801 PM EDT FRI MAR 16 2012

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL ALLEGAN COUNTY IN SOUTHWEST MICHIGAN...
  NORTHWESTERN BARRY COUNTY IN SOUTHWEST MICHIGAN...

* UNTIL 830 PM EDT

* AT 758 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A SEVERE THUNDERSTORM WITH A HISTORY OF PRODUCING LARGE   
  HAIL. THIS STORM WAS LOCATED NEAR WAYLAND..AND MOVING EAST AT 10   
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  MIDDLEVILLE...        WAYLAND...            IRVING...
  ORANGEVILLE...        BRADLEY...            SHELBYVILLE...
  MARTIN...             HASTINGS MUNI ARPT... BOWENS MILL...
  GUN LAKE...           YANKEE SPRINGS...     SCHULTZ...
  CORNING...            HOPKINSBURG...

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 4269 8574 4277 8545 4277 8535 4256 8528
      4251 8568
TIME...MOT...LOC 0000Z 255DEG 7KT 4262 8559
WIND...HAIL <50MPH 1.00IN

$$

JK
2 follow-up statements
970 
WWUS53 KGRR 170017
SVSGRR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
817 PM EDT FRI MAR 16 2012

MIC005-015-170030-
/O.CON.KGRR.SV.W.0009.000000T0000Z-120317T0030Z/
BARRY MI-ALLEGAN MI-
817 PM EDT FRI MAR 16 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EAST CENTRAL
ALLEGAN AND NORTHWESTERN BARRY COUNTIES UNTIL 830 PM EDT...

AT 816 PM EDT...LOCAL LAW ENFORCEMENT REPORTED A SEVERE THUNDERSTORM
PRODUCING LARGE HAIL.  THIS STORM WAS LOCATED NEAR WAYLAND...MOVING
NORTHEAST AT 5 MPH.

LOCATIONS IMPACTED INCLUDE...
  MIDDLEVILLE...        IRVING...             ORANGEVILLE...
  HASTINGS MUNI ARPT... BOWENS MILL...        GUN LAKE...
  YANKEE SPRINGS...     SCHULTZ...            CORNING...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL STONES IN EXCESS OF 
ONE INCH. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY 
FROM WINDOWS.

&&

LAT...LON 4253 8553 4271 8566 4277 8545 4277 8535
      4256 8528
TIME...MOT...LOC 0017Z 231DEG 6KT 4264 8556
WIND...HAIL <50MPH 1.00IN

$$

JK
942 
WWUS53 KGRR 170024
SVSGRR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
824 PM EDT FRI MAR 16 2012

MIC005-015-170034-
/O.EXP.KGRR.SV.W.0009.000000T0000Z-120317T0030Z/
BARRY MI-ALLEGAN MI-
824 PM EDT FRI MAR 16 2012

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL ALLEGAN AND
NORTHWESTERN BARRY COUNTIES WILL EXPIRE AT 830 PM EDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

LAT...LON 4253 8553 4271 8566 4277 8545 4277 8535
      4256 8528
TIME...MOT...LOC 0024Z 231DEG 6KT 4265 8555

$$

JK

The office that day

Everything else NWS Grand Rapids, MI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 16, 8:04 PM EDTAreal Flood AdvisoryGRRAllegan47 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2012Every severe thunderstorm warning in 2012

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.