Alert archive / Ohio / Freeze Watches in 2021

Freeze Watch 4, NWS Wilmington, OH

April 21, 202132 counties in Ohio; 12 counties in Kentucky; 8 counties in Indiana

NWS Wilmington, OH issued this freeze watch at Apr 21, 2021, 3:04 PM EDT for 32 counties in Ohio; 12 counties in Kentucky; 8 counties in Indiana. It took effect at Apr 23, 2021, 1:00 AM EDT. It was in force for .

The area

The counties it named.

The facts

Issued: Apr 21, 2021, 3:04 PM EDT (19:04 UTC)
In effect from: Apr 23, 2021, 1:00 AM EDT
Expired: Apr 22, 2021, 3:12 PM EDT
In force
Issued by: NWS Wilmington, OH

All 52 counties

Dearborn County, IN, Fayette County, IN, Franklin County, IN, Ohio County, IN, Ripley County, IN, Switzerland County, IN, Union County, IN, Wayne County, IN, Boone County, KY, Bracken County, KY, Campbell County, KY, Carroll County, KY, Gallatin County, KY, Grant County, KY, Kenton County, KY, Lewis County, KY, Mason County, KY, Owen County, KY, Pendleton County, KY, Robertson County, KY, Adams County, OH, Auglaize County, OH, Brown County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Darke County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Hamilton County, OH, Hardin County, OH, Highland County, OH, Hocking County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Pickaway County, OH, Pike County, OH, Preble County, OH, Ross County, OH, Scioto County, OH, Shelby County, OH, Union County, OH, Warren County, OH

The radar

The Cincinnati radar (KILN), 20 km from the middle of the area, began a volume at 19:07 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, 7.1 hours before the alert went out and 22 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: 624 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: -99 m²/s²
0-3 km storm-relative helicity: 18 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 Wilmington, OH wrote its last area forecast discussion before this freeze watch went out at Apr 21, 1:38 PM EDT, 1 hour 26 minutes earlier.

Area forecast discussion, Apr 21, 1:38 PM EDT, 1 hour 26 minutes before

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Hazardous weather outlook, Apr 21, 3:04 PM EDT, 0 minutes before

Hazardous Weather Outlook
National Weather Service Wilmington OH
304 PM EDT Wed Apr 21 2021

INZ050-058-059-066-073>075-080-KYZ089>100-OHZ026-034-035-042>046-
051>056-060>065-070>074-077>082-088-221915-
Wayne-Fayette IN-Union IN-Franklin IN-Ripley-Dearborn-Ohio-
Switzerland-Carroll-Gallatin-Boone-Kenton-Campbell-Owen-Grant-
Pendleton-Bracken-Robertson-Mason-Lewis-Hardin-Mercer-Auglaize-Darke-
Shelby-Logan-Union OH-Delaware-Miami-Champaign-Clark-Madison-
Franklin OH-Licking-Preble-Montgomery-Greene-Fayette OH-Pickaway-
Fairfield-Butler-Warren-Clinton-Ross-Hocking-Hamilton-Clermont-Brown-
Highland-Adams-Pike-Scioto-
304 PM EDT Wed Apr 21 2021

...FREEZE WARNING IN EFFECT FROM 1 AM TO 10 AM EDT THURSDAY...
...FREEZE WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY
MORNING...

This Hazardous Weather Outlook is for East Central Indiana,
Southeast Indiana, Northeast Kentucky, Northern Kentucky, Central
Ohio, South Central Ohio, Southwest Ohio and West Central Ohio.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Freeze Warning.

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

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Freeze Warning.
   Freeze Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Local storm report, Apr 21, 9:37 AM EDT, 5 hours 27 minutes before

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Local storm report, Apr 21, 9:39 AM EDT, 5 hours 25 minutes before

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Local storm report, Apr 21, 9:41 AM EDT, 5 hours 23 minutes before

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Local storm report, Apr 21, 9:42 AM EDT, 5 hours 22 minutes before

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Local storm report, Apr 21, 10:05 AM EDT, 4 hours 59 minutes before

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Local storm report, Apr 21, 12:01 PM EDT, 3 hours 3 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 21, 3:54 AM EDT	Freeze Warning	ILN	Adams, Auglaize, Brown, Butler, Champaign, Clark and 26 more	30 hr
Apr 21, 7:27 PM EDT	Special Weather Statement	ILN	Mercer	48 min
Apr 21, 7:44 PM EDT	Special Weather Statement	ILN	Preble	31 min
Apr 21, 6:59 PM EDT	Special Weather Statement	ILN	Wayne	46 min

Nearby

Freeze Watches in Ohio, 2021 Freeze Watches in Kentucky, 2021 Freeze Watches in Indiana, 2021 Every freeze watch 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.