Alert archive / Michigan / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 21, NWS Grand Rapids, MI

June 19, 2009Allegan County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Jun 19, 2009, 9:11 PM EDT for Allegan County, Michigan. It was in force for 49 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: Jun 19, 2009, 9:11 PM EDT (01:11 UTC)
Expired: Jun 19, 2009, 10:00 PM EDT
In force: 49 min
Issued by: NWS Grand Rapids, MI
Area: Storm-based polygon

County Allegan County, MI

The radar

The Grand Rapids radar (KGRR), 34 km from the middle of the area, began a volume at 01:13 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
Jun 19, 9:15 PM EDT	TSTM WND DMG	Burnips, MI	TREE DOWN. TIME ESTIMATED FROM RADAR.

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, 1.2 hours before the alert went out and 201 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: 655 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 761 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 138 m²/s²
0-3 km storm-relative helicity: 231 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 3.3

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KGRR 200111
SVRGRR
MIC005-200200-
/O.NEW.KGRR.SV.W.0021.090620T0111Z-090620T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
911 PM EDT FRI JUN 19 2009

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN ALLEGAN COUNTY IN SOUTHWEST MICHIGAN

* UNTIL 1000 PM EDT

* AT 910 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE HAIL...AND DAMAGING
  WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 11 MILES EAST OF
  SAUGATUCK...AND MOVING EAST AT 30 MPH.

* LOCATIONS WITHIN THE WARNED AREA INCLUDE...
  SAUGATUCK STATE PARK...                     GRAAFSCHAP...
  HOLLAND TULIP ARPT... DOUGLAS...            HAMILTON...
  SAUGATUCK...          BURNIPS...            HOPKINS...
  DORR...               MOLINE...             BRADLEY...
  WAYLAND...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

CONTINUOUS LIGHTNING IS ALSO OCCURRING WITH THIS STORM. LIGHTNING IS
ONE OF NATURES TOP KILLERS. SEEK SHELTER IN A STURDY STRUCTURE
QUICKLY...IF YOU CAN HEAR THUNDER THEN YOU ARE IN DANGER OF BEING
STRUCK.

&&

LAT...LON 4277 8619 4277 8562 4277 8555 4260 8555
      4260 8621
TIME...MOT...LOC 0111Z 267DEG 27KT 4270 8598

$$

NJJ

2 follow-up statements

000 
WWUS53 KGRR 200141
SVSGRR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
941 PM EDT FRI JUN 19 2009

MIC005-200200-
/O.CON.KGRR.SV.W.0021.000000T0000Z-090620T0200Z/
ALLEGAN MI-
941 PM EDT FRI JUN 19 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT
FOR NORTHERN ALLEGAN COUNTY...

AT 938 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE STRONG TO SEVERE THUNDERSTORMS ORIENTED IN A WEST AND EAST 
LINE ACROSS NORTHERN ALLEGAN COUNTY. THE CELLS WERE MOVING EAST AT 
30 MPH... AND ARE CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 
60 MPH. 

* LOCATIONS WITHIN THE WARNED AREA INCLUDE...
  SAUGATUCK STATE PARK...                     GRAAFSCHAP...
  HOLLAND TULIP ARPT... BURNIPS...            DOUGLAS...
  HOPKINS...            DORR...               HAMILTON...
  SAUGATUCK...          MOLINE...             BRADLEY...
  WAYLAND...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

CONTINUOUS LIGHTNING IS ALSO OCCURRING WITH THIS STORM. LIGHTNING IS
ONE OF NATURES TOP KILLERS. SEEK SHELTER IN A STURDY STRUCTURE
QUICKLY...IF YOU CAN HEAR THUNDER THEN YOU ARE IN DANGER OF BEING
STRUCK.

&&

LAT...LON 4277 8619 4277 8562 4276 8555 4260 8555
      4260 8621
TIME...MOT...LOC 0139Z 267DEG 27KT 4271 8569

$$

MEADE

000 
WWUS53 KGRR 200159
SVSGRR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
959 PM EDT FRI JUN 19 2009

MIC005-200210-
/O.EXP.KGRR.SV.W.0021.000000T0000Z-090620T0200Z/
ALLEGAN MI-
959 PM EDT FRI JUN 19 2009

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN ALLEGAN COUNTY HAS
EXPIRED...

ALTHOUGH THUNDERSTORMS WEAKENED TO BELOW SEVERE LIMITS...SOME STILL
MAY PRODUCE HEAVY RAIN...SMALL HAIL...STRONG GUSTY WINDS...OR
FREQUENT LIGHTNING. STAY TUNED FOR THE LATEST WEATHER INFORMATION.

LAT...LON 4277 8619 4277 8562 4276 8555 4260 8555
      4260 8621
TIME...MOT...LOC 0200Z 267DEG 27KT 4272 8548

$$

JK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 8:12 PM EDT	Special Marine Warning	GRR		2 hr
Jun 19, 8:30 PM EDT	Special Weather Statement	GRR	Barry, Clinton, Eaton, Ingham, Ionia, Kent	60 min
Jun 19, 8:35 PM EDT	Flash Flood Warning	GRR	Allegan, Barry, Calhoun, Eaton, Jackson, Kalamazoo and 3 more	6 hr
Jun 19, 8:36 PM EDT	Severe Thunderstorm Warning	GRR	Allegan, Ottawa	39 min
Jun 19, 9:15 PM EDT	Flash Flood Warning	GRR	Clinton, Ingham, Ionia	5 hr
Jun 19, 9:22 PM EDT	Special Weather Statement	GRR	Allegan, Van Buren	53 min
Jun 19, 9:24 PM EDT	Severe Thunderstorm Warning	GRR	Barry, Eaton	66 min
Jun 19, 9:34 PM EDT	Severe Thunderstorm Warning	GRR	Allegan, Van Buren	30 min
Jun 19, 10:27 PM EDT	Severe Thunderstorm Warning	GRR	Barry, Calhoun, Eaton	63 min
Jun 19, 10:46 PM EDT	Severe Thunderstorm Warning	GRR	Ingham, Jackson	59 min
Jun 19, 11:12 PM EDT	River Flood Advisory	GRR	Clinton, Ionia	4 days
Jun 19, 11:12 PM EDT	River Flood Advisory	GRR	Ingham, Ionia	7 days
Jun 19, 11:12 PM EDT	River Flood Advisory	GRR	Barry, Kent	5 days
Jun 19, 11:12 PM EDT	River Flood Advisory	GRR	Calhoun, Ingham	5 days
Jun 19, 11:12 PM EDT	River Flood Advisory	GRR	Ingham, Kalamazoo	5 days
Jun 19, 11:12 PM EDT	River Flood Advisory	GRR	Allegan, Barry	7 days
Jun 19, 11:12 PM EDT	River Flood Advisory	GRR	Calhoun	4 days
Jun 20, 2:23 AM EDT	Areal Flood Warning	GRR	Allegan, Barry, Clinton, Eaton, Ingham, Ionia and 2 more	57 hr
Jun 20, 11:57 AM EDT	River Flood Advisory	GRR	Kalamazoo	12 hr
Jun 20, 11:57 AM EDT	River Flood Advisory	GRR	Allegan	34 hr
Jun 20, 11:57 AM EDT	River Flood Advisory	GRR	Calhoun	4 days

Nearby

Severe Thunderstorm Warnings in Michigan, 2009 Every severe thunderstorm warning in 2009

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.