Alert archive / Ohio / Special Weather Statements in 2021

Special Weather Statement, NWS Wilmington, OH

August 7, 2021Delaware County, Ohio

NWS Wilmington, OH issued this special weather statement at Aug 7, 2021, 4:15 PM EDT for Delaware County, Ohio. It was in force for 30 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: Aug 7, 2021, 4:15 PM EDT (20:15 UTC)
Expired: Aug 7, 2021, 4:45 PM EDT
In force: 30 min
Issued by: NWS Wilmington, OH
Hail: 0.50 in
Wind: 40

County Delaware County, OH

The radar

The Cincinnati radar (KILN), 112 km from the middle of the area, began a volume at 20:15 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 7, 4:42 PM EDT	TSTM WND DMG	Plain City, OH	A FEW TREES DOWNED IN PLAIN CITY. TIME OF EVENT 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 8.3 hours before the alert went out and 110 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: 815 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 973 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

920 
WWUS81 KILN 072015
SPSILN

Special Weather Statement
National Weather Service Wilmington OH
415 PM EDT Sat Aug 7 2021
 
OHZ045-046-054-055-072045-
Delaware OH-Madison OH-Franklin OH-Union OH-
415 PM EDT Sat Aug 7 2021

...A STRONG THUNDERSTORM WILL IMPACT PORTIONS OF NORTHWESTERN
FRANKLIN, WESTERN DELAWARE, NORTHEASTERN MADISON AND SOUTHEASTERN
UNION COUNTIES IN CENTRAL OHIO THROUGH 445 PM EDT...

At 415 PM EDT, a strong thunderstorm was reported 7 miles west of
Delaware, moving southeast at 20 mph.

HAZARD...Winds in excess of 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects. Hail may cause minor damage to outdoor 
         objects.

Locations impacted include...
Dublin, Delaware, Hilliard, Marysville, Powell, Plain City, New
California, Radnor, Milford Center, Shawnee Hills, Ostrander,
Magnetic Springs, Unionville Center, Delaware State Park, US Route 33
at US Route 42, Warrensburg, Kilbourne, Columbus Zoo, Lewis Center
and Amity.

This includes I-71 in Ohio between mile markers 131 and 133.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a sturdy building. 

To report hazardous weather conditions, go to our website at
weather.gov/iln and submit your report via social media, when you can
do so safely.

&&

LAT...LON 4044 8310 4029 8290 3998 8327 4016 8350
      4044 8318
TIME...MOT...LOC 2015Z 319DEG 16KT 4030 8322 

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

$$

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 2:12 PM EDT	Special Weather Statement	ILN	Auglaize	33 min
Aug 7, 2:22 PM EDT	Special Weather Statement	ILN	Shelby	23 min
Aug 7, 3:18 PM EDT	Special Weather Statement	ILN	Delaware	27 min
Aug 7, 3:33 PM EDT	Special Weather Statement	ILN	Union	27 min
Aug 7, 3:48 PM EDT	Special Weather Statement	ILN	Union	27 min
Aug 7, 4:30 PM EDT	Special Weather Statement	ILN	Madison	30 min
Aug 7, 4:41 PM EDT	Special Weather Statement	ILN	Miami	34 min
Aug 7, 4:45 PM EDT	Special Weather Statement	ILN	Franklin	30 min
Aug 7, 4:47 PM EDT	Areal Flood Advisory	ILN	Union	3 hr
Aug 7, 5:02 PM EDT	Special Weather Statement	ILN	Darke	28 min
Aug 7, 5:04 PM EDT	Areal Flood Advisory	ILN	Delaware, Franklin, Licking	3 hr
Aug 7, 5:11 PM EDT	Special Weather Statement	ILN	Franklin	34 min
Aug 7, 5:43 PM EDT	Special Weather Statement	ILN	Greene	32 min
Aug 7, 5:51 PM EDT	Severe Thunderstorm Warning	ILN	Darke	39 min
Aug 7, 6:09 PM EDT	Areal Flood Advisory	ILN	Montgomery	3 hr
Aug 7, 6:20 PM EDT	Severe Thunderstorm Warning	ILN	Wayne	55 min
Aug 7, 6:48 PM EDT	Areal Flood Advisory	ILN	Wayne	3 hr
Aug 7, 7:14 PM EDT	Special Weather Statement	ILN	Fayette	31 min
Aug 7, 7:34 PM EDT	Severe Thunderstorm Warning	ILN	Fayette, Wayne	41 min

Nearby

Special Weather Statements in Ohio, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.