Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 65, NWS Grand Rapids, MI

August 27, 2021Lake County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Aug 27, 2021, 7:36 PM EDT for Lake County, Michigan. It was in force for 39 min. 2 reports 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: Aug 27, 2021, 7:36 PM EDT (23:36 UTC)
Expired: Aug 27, 2021, 8:15 PM EDT
In force: 39 min
Issued by: NWS Grand Rapids, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Lake County, MI

The radar

The Grand Rapids radar (KGRR), 126 km from the middle of the area, began a volume at 23:37 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
Aug 27, 7:50 PM EDT	TSTM WND DMG	Baldwin, MI	NUMEROUS TREES AND LIMBS DOWN IN BALDWIN AREA...VIA LAKE COUNTY DISPATCH. TIME ESTIMATED FROM RADAR AND CONSUMERS ENERGY OUTAGE MAP.
Aug 27, 7:53 PM EDT	TSTM WND DMG	Baldwin, MI	TREE DOWN ON WIRES NEAR U.S. FOREST SERVICE RANGER STATION IN BALDWIN. PEA-SIZED HAIL ALSO OBSERVED. RELAYED VIA WFO APX.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 11.6 hours before the alert went out and 194 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: 733 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 112 m²/s²
0-3 km storm-relative helicity: 135 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

831 
WUUS53 KGRR 272336
SVRGRR
MIC085-280015-
/O.NEW.KGRR.SV.W.0065.210827T2336Z-210828T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Rapids MI
736 PM EDT Fri Aug 27 2021

The National Weather Service in Grand Rapids has issued a

* Severe Thunderstorm Warning for...
  Central Lake County in west central Michigan...

* Until 815 PM EDT.

* At 735 PM EDT, a severe thunderstorm was located near Baldwin,
  moving east at 20 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Baldwin...             Luther...              Chase...
  Nirvana...             Bristol...             Wolf Lake...
  Idlewild...            

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4416 8557 4389 8557 4387 8603 4400 8604
TIME...MOT...LOC 2335Z 258DEG 16KT 4394 8594 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

THIELKE

3 follow-up statements

204 
WWUS53 KGRR 272350
SVSGRR

Severe Weather Statement
National Weather Service Grand Rapids MI
750 PM EDT Fri Aug 27 2021

MIC085-280015-
/O.CON.KGRR.SV.W.0065.000000T0000Z-210828T0015Z/
Lake MI-
750 PM EDT Fri Aug 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM EDT
FOR CENTRAL LAKE COUNTY...

At 750 PM EDT, a severe thunderstorm was located near Baldwin, moving
east at 20 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Baldwin...             Luther...              Chase...
Nirvana...             Bristol...             Wolf Lake...
Idlewild...            

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4416 8557 4389 8557 4388 8592 4399 8598
TIME...MOT...LOC 2350Z 262DEG 16KT 4394 8585 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

THIELKE

329 
WWUS53 KGRR 280002
SVSGRR

Severe Weather Statement
National Weather Service Grand Rapids MI
802 PM EDT Fri Aug 27 2021

MIC085-280015-
/O.CON.KGRR.SV.W.0065.000000T0000Z-210828T0015Z/
Lake MI-
802 PM EDT Fri Aug 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM EDT
FOR SOUTHEASTERN LAKE COUNTY...

At 802 PM EDT, a severe thunderstorm was located near Baldwin, moving
east at 20 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Baldwin...             Chase...               Idlewild...
Nirvana...             

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4406 8557 4389 8557 4388 8587 4396 8587
TIME...MOT...LOC 0002Z 268DEG 17KT 4390 8578 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

THIELKE

833 
WWUS53 KGRR 280013
SVSGRR

Severe Weather Statement
National Weather Service Grand Rapids MI
813 PM EDT Fri Aug 27 2021

MIC085-280023-
/O.EXP.KGRR.SV.W.0065.000000T0000Z-210828T0015Z/
Lake MI-
813 PM EDT Fri Aug 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LAKE COUNTY WILL
EXPIRE AT 815 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

LAT...LON 4406 8557 4389 8557 4388 8587 4396 8587
TIME...MOT...LOC 0013Z 258DEG 16KT 4391 8573 

$$

THIELKE

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 27, 3:22 PM EDT	Heat Advisory	GRR	Allegan, Barry, Calhoun, Clare, Clinton, Eaton and 17 more	29 hr
Aug 27, 7:29 PM EDT	Special Weather Statement	GRR	Lake	61 min
Aug 27, 7:49 PM EDT	Severe Thunderstorm Warning	GRR	Lake	41 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2021 Every severe thunderstorm warning in 2021

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.