Alert archive / Ohio / Special Weather Statements in 2021

Special Weather Statement, NWS Cleveland, OH

August 9, 2021Knox County, Ohio

NWS Cleveland, OH issued this special weather statement at Aug 9, 2021, 4:29 PM EDT for Knox County, Ohio. It was in force for 31 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 9, 2021, 4:29 PM EDT (20:29 UTC)
Expired
Aug 9, 2021, 5:00 PM EDT
In force
31 min
Issued by
NWS Cleveland, OH
Hail
0.00 in
Wind
40

County Knox County, OH

The radar

The Cleveland radar (KCLE), 115 km from the middle of the area, began a volume at 20:31 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 8.5 hours before the alert went out and 171 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, Cncnati-Daytn, OH at 12:00Z on 2021-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 210 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, Cncnati-Daytn, OH at 12:00Z on 2021-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 33 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
210 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
1127 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
33 m²/s²
0-3 km storm-relative helicity
56 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

639 
WWUS81 KCLE 092029
SPSCLE

Special Weather Statement
National Weather Service Cleveland OH
429 PM EDT Mon Aug 9 2021
 
OHZ029-030-038-047-092100-
Holmes OH-Richland OH-Ashland OH-Knox OH-
429 PM EDT Mon Aug 9 2021

...A strong thunderstorm will impact portions of southeastern
Richland, south central Ashland, southwestern Holmes and eastern Knox
Counties through 500 PM EDT...

At 428 PM EDT, Doppler radar was tracking a strong thunderstorm near
Gambier, or near Mount Vernon, moving north at 30 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects.

Locations impacted include...
Mount Vernon, Loudonville, Gambier, Danville, Glenmont, Butler,
Perrysville, Gann, North Liberty and Bladensburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 4037 8255 4070 8245 4053 8197 4045 8204
      4045 8218 4029 8219 4025 8223
TIME...MOT...LOC 2028Z 200DEG 24KT 4042 8241 

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

$$

Maines

The office that day

Everything else NWS Cleveland, OH issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 9, 1:24 PM EDTSpecial Weather StatementCLELucas51 min
Aug 9, 3:48 PM EDTSpecial Weather StatementCLEWood42 min
Aug 9, 4:41 PM EDTSpecial Weather StatementCLELucas34 min
Aug 9, 4:58 PM EDTSpecial Weather StatementCLERichland32 min
Aug 9, 6:43 PM EDTSpecial Weather StatementCLESummit32 min

Nearby

Special Weather Statements in Ohio, 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.