Alert archive / Michigan / Special Weather Statements in 2021

Special Weather Statement, NWS Gaylord, MI

August 6, 2021Antrim County, Michigan

NWS Gaylord, MI issued this special weather statement at Aug 6, 2021, 9:00 PM EDT for Antrim County, Michigan. It was in force for 60 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 6, 2021, 9:00 PM EDT (01:00 UTC)
Expired
Aug 6, 2021, 10:00 PM EDT
In force
60 min
Issued by
NWS Gaylord, MI
Hail
0.50 in
Wind
30

County Antrim County, MI

The radar

The NCL Michigan radar (KAPX), 22 km from the middle of the area, began a volume at 01:03 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

Alpena, MI (KAPX), launched 00:00Z, 1.0 hours before the alert went out and 205 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-pSkew-T log-p diagram, Alpena, MI at 00:00Z on 2021-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 772 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Alpena, MI at 00:00Z on 2021-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 88 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
772 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
632 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
88 m²/s²
0-3 km storm-relative helicity
125 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6

Open this sounding in Storm Lab

The text

As transmitted.

503 
WWUS83 KAPX 070100
SPSAPX

Special Weather Statement
National Weather Service Gaylord MI
900 PM EDT Fri Aug 6 2021
 
MIZ021-022-027-028-070200-
Otsego MI-Kalkaska MI-Antrim MI-Crawford MI-
900 PM EDT Fri Aug 6 2021

...A strong thunderstorm will impact portions of southwestern Otsego,
southeastern Antrim, northwestern Crawford and northeastern Kalkaska
Counties through 1000 PM EDT...

At 859 PM EDT, Doppler radar was tracking a strong thunderstorm over
Mancelona, moving east at 20 mph.

HAZARD...Winds in excess of 30 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects. Minor damage to outdoor objects is 
         possible.

Locations impacted include...
  Mancelona and Alba.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 4479 8516 4500 8513 4502 8474 4473 8476
TIME...MOT...LOC 0059Z 275DEG 12KT 4490 8503 

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...30 MPH

$$

Nearby

Special Weather Statements in Michigan, 2021Every 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.