Alert archive / Ohio / Heat Advisories in 2020

Heat Advisory 1, NWS Cleveland, OH

July 8, 202024 counties in Ohio

NWS Cleveland, OH issued this heat advisory at Jul 8, 2020, 3:22 PM EDT for 24 counties in Ohio. It took effect at Jul 9, 2020, 11:00 AM EDT. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued
Jul 8, 2020, 3:22 PM EDT (19:22 UTC)
In effect from
Jul 9, 2020, 11:00 AM EDT
Expired
Jul 9, 2020, 9:00 PM EDT
In force
10 hr
Issued by
NWS Cleveland, OH
All 24 counties

Ashland County, OH, Crawford County, OH, Cuyahoga County, OH, Erie County, OH, Hancock County, OH, Holmes County, OH, Huron County, OH, Knox 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, Wayne County, OH, Wood County, OH, Wyandot County, OH

The radar

The Cleveland radar (KCLE), 65 km from the middle of the area, began a volume at 19:24 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, 7.4 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-pSkew-T log-p diagram, Detroit, MI at 12:00Z on 2020-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 806 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, Detroit, MI at 12:00Z on 2020-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 5 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
806 J/kg
Mixed-layer CIN
-68 J/kg
Mixed-layer LCL
1130 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
5 m²/s²
0-3 km storm-relative helicity
21 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 8, 2:11 PM EDT, 1 hour 11 minutes earlier.

Area forecast discussion, Jul 8, 2:11 PM EDT, 1 hour 11 minutes before
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Hazardous weather outlook, Jul 8, 3:39 AM EDT, 11 hours 43 minutes before
Hazardous Weather Outlook
National Weather Service Cleveland OH
339 AM EDT Wed Jul 8 2020

OHZ003-006>014-017>023-027>033-036>038-047-089-PAZ001>003-090745-
Lucas-Wood-Ottawa-Sandusky-Erie-Lorain-Cuyahoga-Lake-Geauga-
Ashtabula Inland-Hancock-Seneca-Huron-Medina-Summit-Portage-Trumbull-
Wyandot-Crawford-Richland-Ashland-Wayne-Stark-Mahoning-Marion-Morrow-
Holmes-Knox-Ashtabula Lakeshore-Northern Erie-Southern Erie-
339 AM EDT Wed Jul 8 2020

This Hazardous Weather Outlook is for north central Ohio, northeast
Ohio, northwest Ohio and northwest Pennsylvania.

.DAY ONE...Today and tonight.

Hot conditions continue across the area with high temperatures in the
in the low to mid 90s and heat index values in the upper 90s for some
locations.

Scattered thunderstorms are expected today. The strongest
thunderstorms will be capable of producing wind gusts to 50 mph. In
addition, storm movement will be around 10 mph and heavy rainfall may
lead to localized flooding.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

A prolonged stretch of hot conditions will continue through Friday.
High temperatures will be in the low to mid 90s each day with heat
index values of 95 to 100. Heat Advisories may be needed for a
portion of the area later this week. Precautions should be taken to
stay cool and avoid heat related illnesses.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

LEZ061-142>149-162>169-090745-
Lake Erie open waters from Ripley to Buffalo NY-
Lake Erie nearshore waters from Maumee Bay to Reno Beach OH-
Lake Erie nearshore waters from Reno Beach to The Islands OH-
Lake Erie nearshore waters from The Islands to Vermilion OH-
Lake Erie nearshore waters from Vermilion to Avon Point OH-
Lake Erie nearshore waters from Avon Point to Willowick OH-
Lake Erie nearshore waters from Willowick to Geneva-on-the Lake OH-
Lake Erie nearshore waters from Geneva-on-the-Lake to Conneaut OH-
Lake Erie nearshore waters from Conneaut OH to Ripley NY-
Lake Erie open waters from Maumee Bay to Reno Beach OH-
Lake Erie open waters from Reno Beach to The Islands OH-
Lake Erie open waters from The Islands to Vermilion OH-
Lake Erie open waters from Vermilion to Avon Point OH-
Lake Erie open waters from Avon Point to Willowick OH-
Lake Erie open waters from Willowick to Geneva-on-the-Lake OH-
Lake Erie open waters from Geneva-on-the-Lake to Conneaut OH-
Lake Erie open waters from Conneaut OH to Ripley NY-
339 AM EDT Wed Jul 8 2020

This Hazardous Weather Outlook is for central Lake Erie, eastern
Lake Erie and western Lake Erie.

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Local storm report, Jul 8, 9:22 AM EDT, 6 hours before
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Local storm report, Jul 8, 9:33 AM EDT, 5 hours 49 minutes before
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Local storm report, Jul 8, 9:44 AM EDT, 5 hours 38 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 7, 10:52 PM EDTSpecial Marine WarningCLE38 min
Jul 8, 12:13 AM EDTSpecial Weather StatementCLELucas47 min
Jul 8, 3:35 PM EDTSpecial Weather StatementCLESummit40 min
Jul 8, 4:42 PM EDTSpecial Weather StatementCLECuyahoga48 min
Jul 8, 5:51 PM EDTSpecial Weather StatementCLEWood39 min
Jul 8, 5:59 PM EDTSpecial Weather StatementCLEHuron, Medina46 min
Jul 8, 6:39 PM EDTSpecial Weather StatementCLELucas, Ottawa, Wood51 min
Jul 8, 6:59 PM EDTSevere Thunderstorm WarningCLEOttawa, Sandusky42 min
Jul 8, 7:01 PM EDTSpecial Marine WarningCLE48 min
Jul 8, 7:16 PM EDTFlash Flood WarningCLEOttawa, Sandusky3 hr

Nearby

Heat Advisories in Ohio, 2020Every 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.