Alert archive / Ohio / Heat Advisories in 2020

Heat Advisory 2, NWS Cleveland, OH

July 18, 202028 counties in Ohio

NWS Cleveland, OH issued this heat advisory at Jul 18, 2020, 2:52 PM EDT for 28 counties in Ohio. It took effect at Jul 19, 2020, 12:00 PM EDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Jul 18, 2020, 2:52 PM EDT (18:52 UTC)
In effect from: Jul 19, 2020, 12:00 PM EDT
Expired: Jul 19, 2020, 7:23 PM EDT
In force: 7 hr
Issued by: NWS Cleveland, OH

All 28 counties

Ashland County, OH, Ashtabula County, OH, Crawford County, OH, Cuyahoga County, OH, Erie County, OH, Geauga County, OH, Hancock County, OH, Holmes County, OH, Huron County, OH, Knox County, OH, Lake County, OH, Lorain County, OH, Lucas County, OH, Mahoning County, OH, Marion County, OH, Medina County, OH, Morrow County, OH, Ottawa County, OH, Portage County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Wayne County, OH, Wood County, OH, Wyandot County, OH

The radar

The Cleveland radar (KCLE), 46 km from the middle of the area, began a volume at 18:55 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, 6.9 hours before the alert went out and 203 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: 27 J/kg
Mixed-layer CIN: -291 J/kg
Mixed-layer LCL: 1163 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 123 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Cleveland, OH wrote its last area forecast discussion before this heat advisory went out at Jul 18, 1:17 PM EDT, 1 hour 35 minutes earlier.

Area forecast discussion, Jul 18, 1:17 PM EDT, 1 hour 35 minutes before

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Hazardous weather outlook, Jul 18, 3:23 AM EDT, 11 hours 29 minutes before

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Nearby

Heat Advisories in Ohio, 2020 Every heat advisory in 2020

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.