Alert archive / Ohio / Freeze Watches in 2012

Freeze Watch 6, NWS Cleveland, OH

April 28, 201220 counties in Ohio; Crawford County, Erie County, Pennsylvania

NWS Cleveland, OH issued this freeze watch at Apr 28, 2012, 4:23 AM EDT for 20 counties in Ohio; Crawford County, Erie County, Pennsylvania. It took effect at Apr 29, 2012, 12:00 AM EDT. It was in force for .

The area

The counties it named.

The facts

Issued: Apr 28, 2012, 4:23 AM EDT (08:23 UTC)
In effect from: Apr 29, 2012, 12:00 AM EDT
Expired: Apr 28, 2012, 3:58 PM EDT
In force
Issued by: NWS Cleveland, OH

All 22 counties

Ashland County, OH, Ashtabula County, OH, Crawford County, OH, Cuyahoga County, OH, Erie County, OH, Geauga County, OH, Huron County, OH, Lorain County, OH, Lucas County, OH, Mahoning County, OH, Medina County, OH, Ottawa County, OH, Portage County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Summit County, OH, Trumbull County, OH, Wayne County, OH, Wood County, OH, Crawford County, PA, Erie County, PA

The radar

The Cleveland radar (KCLE), 15 km from the middle of the area, began a volume at 08:23 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 00:00Z, 8.4 hours before the alert went out and 198 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2700 m above ground
0-6 km bulk shear: 73 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: -27 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 freeze watch 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 freeze watch went out at Apr 28, 4:13 AM EDT, 10 minutes earlier.

Area forecast discussion, Apr 28, 4:13 AM EDT, 10 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 3:58 PM EDT	Freeze Warning	CLE	Ashland, Ashtabula, Crawford, Cuyahoga, Erie, Geauga and 15 more	17 hr

Nearby

Freeze Watches in Ohio, 2012 Freeze Watches in Pennsylvania, 2012 Every freeze watch in 2012

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.