Alert archive / Michigan / Special Weather Statements in 2021

Special Weather Statement, NWS Grand Rapids, MI

June 11, 2021Clinton County, Ionia County, Michigan

NWS Grand Rapids, MI issued this special weather statement at Jun 11, 2021, 5:41 PM EDT for Clinton County, Ionia County, Michigan. It was in force for 64 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: Jun 11, 2021, 5:41 PM EDT (21:41 UTC)
Expired: Jun 11, 2021, 6:45 PM EDT
In force: 64 min
Issued by: NWS Grand Rapids, MI

Counties Clinton County, MI, Ionia County, MI

The radar

The Grand Rapids radar (KGRR), 61 km from the middle of the area, began a volume at 21:43 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 12:00Z, 9.7 hours before the alert went out and 117 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: 94 J/kg
Mixed-layer CIN: -126 J/kg
Mixed-layer LCL: 1136 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -20 m²/s²
0-3 km storm-relative helicity: -19 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Grand Rapids, MI wrote its last area forecast discussion before this special weather statement went out at Jun 11, 2:55 PM EDT, 2 hours 46 minutes earlier.

Area forecast discussion, Jun 11, 2:55 PM EDT, 2 hours 46 minutes before

Area Forecast Discussion
National Weather Service Grand Rapids MI
255 PM EDT Fri Jun 11 2021

LATEST UPDATE...
Synopsis/Discussion/Marine

.SYNOPSIS...
Issued at 255 PM EDT Fri Jun 11 2021

- Chances for rain into this evening and on Saturday

- Cooling off and drying out next week

&&

.DISCUSSION...(This evening through next Friday)
Issued at 255 PM EDT Fri Jun 11 2021

- Chances for rain into this evening and on Saturday

Some strong updrafts with reflectivity cores above the minus 20C
level are currently seen on radar just off the northeast corner of
the forecast area and some of these could impinge on Clare County
and our far eastern counties into the evening before they
diminish after sunset.

Patchy dense, but shallow fog is possible in spots again tonight
then clouds and showers move in from the west during the morning
and afternoon as a sfc trough/weak cold front moves through.
Expect a few stronger updrafts with the chance for small hail and
strong downdrafts in the afternoon, generally east of US 131 where
LIs of minus 5 to minus 8 and CAPES over 2000 J/kg are progged
during the afternoon. One limiting factor is deep layer shear
is relatively weak at around 20 to 25 knots.

- Cooling off and drying out next week

Longwave pattern becomes more amplified across the CONUS early
next week with upper troughing across the NE CONUS and ridging in
the West. A cold front could bring rain showers Sunday night,
followed by drier and cooler weather as a Canadian anticyclone
builds into the Great Lakes. Dew points will be falling quite
dramatically, and low temperatures in the 40s are possible by
Wednesday morning.

Dry weather should prevail until Friday as northern stream
shortwave trough tops the western ridge and a sfc cold front sags
into the central Great Lakes bringing the chance of showers.

&&

.AVIATION...(For the 18Z TAFS through 18Z Saturday afternoon)
Issued at 1200 PM EDT Fri Jun 11 2021

Fair wx with VFR conditions will continue at most of the terminals
this afternoon and evening. Isolated showers and storms are
expected to develop mid to late afternoon and could clip KLAN but
should otherwise stay north to northeast of the rest of the
terminals.

Patchy fog will develop overnight and will likely impact all the
terminals during the early to mid morning hours Saturday and cause
conditions to deteriorate to MVFR and potentially IFR. Fog will
dissipate by late morning Saturday with VFR conditions to follow
through 18Z. Development of scattered showers and isolated
thunderstorms is possible tomorrow but potential is too low to
warrant inclusion in any of the terminal forecasts for now.

&&

.MARINE...
Issued at 255 PM EDT Fri Jun 11 2021

Areas of fog are possible again tonight. Scattered thunderstorms
are expected on Saturday. Northwest winds could gust over 20 knots
on Saturday afternoon and evening but most of the weekend should
see winds less than 20 knots and waves less than four feet.

&&

.GRR WATCHES/WARNINGS/ADVISORIES...
MI...None.
LM...None.
&&

SYNOPSIS...Ostuno
DISCUSSION...Ostuno
AVIATION...Laurens
MARINE...Ostuno

Hazardous weather outlook, Jun 11, 4:47 PM EDT, 54 minutes before

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In the hours before

Special weather statement, Jun 11, 4:13 PM EDT, 1 hour 28 minutes before

Special Weather Statement
National Weather Service Grand Rapids MI
413 PM EDT Fri Jun 11 2021

MIZ046-112115-
Isabella-
413 PM EDT Fri Jun 11 2021

...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT ISABELLA COUNTY...

At 412 PM EDT, strong thunderstorms were clustered 6 miles northeast
of Farwell, or 6 miles north of Clare, moving south at 20 mph.

Wind gusts of 50 to 55 mph and nickel size hail are possible with
these storms.

Locations impacted include...
Mount Pleasant...      Clare...               Shepherd...
Rosebush...            Lake Isabella...       Brinton...
Delwin...              Winn...                Loomis...
Beal City...           Weidman...             Blanchard...

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 4347 8508 4381 8508 4381 8462 4359 8461
      4353 8461 4352 8460 4351 8460 4347 8461
TIME...MOT...LOC 2012Z 023DEG 21KT 4391 8481

OSTUNO

Local storm report, Jun 11, 4:43 PM EDT, 58 minutes before

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Local storm report, Jun 11, 4:46 PM EDT, 55 minutes before

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Local storm report, Jun 11, 5:21 PM EDT, 20 minutes before

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Local storm report, Jun 11, 5:30 PM EDT, 11 minutes before

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Special weather statement, Jun 11, 5:41 PM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 3:23 PM EDT	Special Weather Statement	GRR	Clare	67 min
Jun 11, 3:46 PM EDT	Severe Thunderstorm Warning	GRR	Clare	44 min
Jun 11, 4:13 PM EDT	Special Weather Statement	GRR	Isabella	62 min

Nearby

Special Weather Statements in Michigan, 2021 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.