Alert archive / Michigan / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 4, NWS Grand Rapids, MI

March 12, 2012Van Buren County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Mar 12, 2012, 5:32 PM EDT for Van Buren County, Michigan. It was in force for 43 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: Mar 12, 2012, 5:32 PM EDT (21:32 UTC)
Expired: Mar 12, 2012, 6:15 PM EDT
In force: 43 min
Issued by: NWS Grand Rapids, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Van Buren County, MI

The radar

The Grand Rapids radar (KGRR), 87 km from the middle of the area, began a volume at 21:34 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
Mar 12, 5:37 PM EDT	HAIL 0.5	Hartford, 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
Mar 12, 4:22 PM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 9.5 hours before the alert went out and 229 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1981 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 124 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

452 
WUUS53 KGRR 122132
SVRGRR
MIC159-122215-
/O.NEW.KGRR.SV.W.0004.120312T2132Z-120312T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
532 PM EDT MON MAR 12 2012

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  VAN BUREN COUNTY IN SOUTHWEST MICHIGAN...

* UNTIL 615 PM EDT

* AT 529 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE HAIL...
  AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED
  NEAR PAW PAW..AND MOVING NORTHEAST AT 60 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SOUTH HAVEN...        DECATUR...            BANGOR...
  PAW PAW...            VAN BUREN STATE PARK...
  PORTER TWP...         MCDONALD...           PALISADES PARK...
  LACOTA...             GRAND JUNCTION...     BREEDSVILLE...
  KENDALL...            LAWRENCE...           LAWTON...
  GOBLES...             KEELER...             BLOOMINGDALE...
  GLENDALE...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT MONDAY EVENING
FOR SOUTHWESTERN MICHIGAN.

LAT...LON 4207 8622 4224 8622 4224 8636 4235 8630
      4241 8628 4242 8627 4242 8577 4207 8576
TIME...MOT...LOC 2132Z 237DEG 51KT 4227 8592
WIND...HAIL 60MPH 1.00IN

$$

TJT

1 follow-up statement

165 
WWUS53 KGRR 122211
SVSGRR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
611 PM EDT MON MAR 12 2012

MIC159-122221-
/O.EXP.KGRR.SV.W.0004.000000T0000Z-120312T2215Z/
VAN BUREN MI-
611 PM EDT MON MAR 12 2012

...THE SEVERE THUNDERSTORM WARNING FOR VAN BUREN COUNTY WILL EXPIRE
AT 615 PM EDT...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT MONDAY EVENING
FOR SOUTHWESTERN MICHIGAN.

LAT...LON 4207 8622 4224 8622 4224 8636 4235 8630
      4241 8628 4242 8627 4242 8577 4207 8576
TIME...MOT...LOC 2211Z 237DEG 51KT 4257 8529

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 12, 3:18 AM EDT	Small Craft Advisory	GRR		17 hr
Mar 12, 11:54 AM EDT	River Flood Advisory	GRR	Ionia	5 days
Mar 12, 11:54 AM EDT	River Flood Advisory	GRR	Ingham	47 hr
Mar 12, 1:32 PM EDT	Special Marine Warning	GRR		100 min
Mar 12, 2:18 PM EDT	Special Weather Statement	GRR	Muskegon, Oceana	57 min
Mar 12, 2:45 PM EDT	Special Weather Statement	GRR	Mason	60 min
Mar 12, 3:01 PM EDT	Special Weather Statement	GRR	Lake, Newaygo	59 min
Mar 12, 3:10 PM EDT	Special Weather Statement	GRR	Muskegon	50 min
Mar 12, 3:15 PM EDT	Special Weather Statement	GRR	Newaygo	60 min
Mar 12, 3:43 PM EDT	Special Weather Statement	GRR	Mecosta	62 min
Mar 12, 4:00 PM EDT	Severe Thunderstorm Warning	GRR	Mecosta, Montcalm, Newaygo	45 min
Mar 12, 4:05 PM EDT	Severe Thunderstorm Warning	GRR	Clare, Osceola	40 min
Mar 12, 4:33 PM EDT	Severe Thunderstorm Warning	GRR	Isabella	21 min
Mar 12, 4:36 PM EDT	Special Marine Warning	GRR		84 min
Mar 12, 5:02 PM EDT	Special Weather Statement	GRR	Van Buren	58 min
Mar 12, 5:24 PM EDT	Special Weather Statement	GRR	Allegan	66 min
Mar 12, 5:38 PM EDT	Tornado Warning	GRR	Van Buren	16 min
Mar 12, 5:44 PM EDT	Special Weather Statement	GRR	Mecosta	61 min
Mar 12, 5:44 PM EDT	Tornado Warning	GRR	Kalamazoo	43 min
Mar 12, 5:59 PM EDT	Tornado Warning	GRR	Allegan, Barry	44 min
Mar 12, 6:08 PM EDT	Tornado Warning	GRR	Isabella, Mecosta	37 min
Mar 12, 6:36 PM EDT	Tornado Warning	GRR	Eaton	24 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2012 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.