Alert archive / Michigan / Tornado Warnings in 2011

Tornado Warning 13, NWS Grand Rapids, MI

August 13, 2011Jackson County, Michigan

NWS Grand Rapids, MI issued this tornado warning at Aug 13, 2011, 6:25 PM EDT for Jackson County, Michigan. It was in force for 20 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: Aug 13, 2011, 6:25 PM EDT (22:25 UTC)
Expired: Aug 13, 2011, 6:45 PM EDT
In force: 20 min
Issued by: NWS Grand Rapids, MI
Area: Storm-based polygon

County Jackson County, MI

The radar

The Detroit radar (KDTX), 67 km from the middle of the area, began a volume at 22:28 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 13, 1:12 PM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 10.4 hours before the alert went out and 71 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: 4981 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 132 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.

558 
WFUS53 KGRR 132225
TORGRR
MIC075-132245-
/O.NEW.KGRR.TO.W.0013.110813T2225Z-110813T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
625 PM EDT SAT AUG 13 2011

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN JACKSON COUNTY IN SOUTH CENTRAL MICHIGAN...

* UNTIL 645 PM EDT

* AT 621 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS
  DANGEROUS STORM WAS LOCATED NEAR STOCKBRIDGE...AND MOVING NORTHEAST
  AT 30 MPH.

THE WARNING INCLUDES AREAS SURROUNDING THESE LOCATIONS...
  WATERLOO TWP...       WATERLOO...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4233 8414 4242 8429 4243 8417 4243 8414
      4239 8412 4233 8412
TIME...MOT...LOC 2226Z 244DEG 27KT 4242 8414

$$

TJT

1 follow-up statement

983 
WWUS53 KGRR 132237
SVSGRR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
637 PM EDT SAT AUG 13 2011

MIC075-132246-
/O.EXP.KGRR.TO.W.0013.000000T0000Z-110813T2245Z/
JACKSON MI-
637 PM EDT SAT AUG 13 2011

...THE TORNADO WARNING FOR NORTHEASTERN JACKSON COUNTY WILL EXPIRE AT
645 PM EDT...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA...HOWEVER STRONG WINDS AND HEAVY RAIN ARE STILL POSSIBLE WITH
THIS THUNDERSTORM IN FAR EASTERN JACKSON COUNTY.

REMEMBER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR
EASTERN JACKSON COUNTY UNTIL 700 PM EDT.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
SATURDAY EVENING FOR SOUTH CENTRAL MICHIGAN.

LAT...LON 4233 8414 4242 8429 4243 8417 4243 8414
      4239 8412 4233 8412
TIME...MOT...LOC 2236Z 244DEG 27KT 4245 8405

$$

DUKE

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 11:19 PM EDT	Special Weather Statement	GRR	Lake, Mason, Muskegon, Newaygo, Oceana	116 min
Aug 13, 2:43 AM EDT	Areal Flood Advisory	GRR	Mason, Oceana	6 hr
Aug 13, 5:02 AM EDT	Areal Flood Advisory	GRR	Muskegon	6 hr
Aug 13, 6:23 AM EDT	Areal Flood Advisory	GRR	Newaygo	9 hr
Aug 13, 8:05 AM EDT	Areal Flood Advisory	GRR	Kent	6 hr
Aug 13, 9:31 AM EDT	Special Weather Statement	GRR	Allegan	59 min
Aug 13, 9:52 AM EDT	Flash Flood Warning	GRR	Allegan	7 hr
Aug 13, 10:37 AM EDT	Special Weather Statement	GRR	Allegan, Kalamazoo, Van Buren	53 min
Aug 13, 10:42 AM EDT	Special Marine Warning	GRR		79 min
Aug 13, 10:53 AM EDT	Severe Thunderstorm Warning	GRR	Van Buren	67 min
Aug 13, 11:35 AM EDT	Small Craft Advisory	GRR		43 hr
Aug 13, 11:39 AM EDT	Flash Flood Warning	GRR	Van Buren	5 hr
Aug 13, 12:46 PM EDT	Special Weather Statement	GRR	Kalamazoo	59 min
Aug 13, 1:06 PM EDT	Severe Thunderstorm Warning	GRR	Kalamazoo, Van Buren	54 min
Aug 13, 1:31 PM EDT	Areal Flood Advisory	GRR	Kalamazoo	5 hr
Aug 13, 2:05 PM EDT	Special Weather Statement	GRR	Calhoun	55 min
Aug 13, 2:08 PM EDT	Special Weather Statement	GRR	Montcalm	67 min
Aug 13, 2:22 PM EDT	Special Marine Warning	GRR		83 min
Aug 13, 2:43 PM EDT	Special Weather Statement	GRR	Kent, Ottawa	92 min
Aug 13, 2:47 PM EDT	Flash Flood Warning	GRR	Newaygo	7 hr
Aug 13, 2:53 PM EDT	Special Weather Statement	GRR	Allegan	82 min
Aug 13, 3:07 PM EDT	Severe Thunderstorm Warning	GRR	Kent, Ottawa	70 min
Aug 13, 3:09 PM EDT	Special Marine Warning	GRR		81 min
Aug 13, 3:10 PM EDT	Special Marine Warning	GRR		77 min
Aug 13, 3:14 PM EDT	Areal Flood Advisory	GRR	Kent, Muskegon, Ottawa	106 min
Aug 13, 3:21 PM EDT	Severe Thunderstorm Warning	GRR	Kent, Ottawa	54 min
Aug 13, 3:32 PM EDT	Special Weather Statement	GRR	Newaygo	58 min
Aug 13, 3:43 PM EDT	Severe Thunderstorm Warning	GRR	Van Buren	65 min
Aug 13, 3:56 PM EDT	Special Weather Statement	GRR	Ionia	64 min
Aug 13, 4:08 PM EDT	Special Weather Statement	GRR	Allegan, Barry	82 min
Aug 13, 4:29 PM EDT	Special Weather Statement	GRR	Kalamazoo	91 min
Aug 13, 4:46 PM EDT	Special Weather Statement	GRR	Calhoun, Eaton	89 min
Aug 13, 5:04 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun, Kalamazoo	64 min
Aug 13, 5:14 PM EDT	Special Weather Statement	GRR	Clinton, Ingham	91 min
Aug 13, 5:17 PM EDT	Areal Flood Advisory	GRR	Newaygo	105 min
Aug 13, 5:35 PM EDT	Severe Thunderstorm Warning	GRR	Jackson	73 min
Aug 13, 6:19 PM EDT	Severe Thunderstorm Warning	GRR	Ingham	30 min

Nearby

Tornado Warnings in Michigan, 2011 Every tornado warning in 2011 Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.