Alert archive / Ohio / Freeze Warnings in 2012

Freeze Warning 7, NWS Cleveland, OH

April 12, 20125 counties in Ohio; Crawford County, Erie County, Pennsylvania

NWS Cleveland, OH issued this freeze warning at Apr 12, 2012, 3:11 PM EDT for 5 counties in Ohio; Crawford County, Erie County, Pennsylvania. It took effect at Apr 13, 2012, 12:00 AM EDT. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 12, 2012, 3:11 PM EDT (19:11 UTC)
In effect from
Apr 13, 2012, 12:00 AM EDT
Expired
Apr 13, 2012, 9:00 AM EDT
In force
9 hr
Issued by
NWS Cleveland, OH

Counties Ashtabula County, OH, Geauga County, OH, Mahoning County, OH, Portage County, OH, Trumbull County, OH, Crawford County, PA, Erie County, PA

The radar

The Cleveland radar (KCLE), 98 km from the middle of the area, began a volume at 19:09 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

Pittsburgh, PA (KPIT), launched 12:00Z, 7.2 hours before the alert went out and 134 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, Pittsburgh, PA at 12:00Z on 2012-04-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 12:00Z on 2012-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
981 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
91 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

534 
WWUS71 KCLE 121911
NPWCLE

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE CLEVELAND OH
311 PM EDT THU APR 12 2012

OHZ010>012-020-021-029>032-038-047-089-PAZ001-122015-
/O.CAN.KCLE.FZ.A.0004.120413T0400Z-120413T1300Z/
LORAIN-CUYAHOGA-LAKE-MEDINA-SUMMIT-RICHLAND-ASHLAND-WAYNE-STARK-
HOLMES-KNOX-ASHTABULA LAKESHORE-NORTHERN ERIE-
INCLUDING THE CITIES OF...LORAIN...CLEVELAND...MENTOR...MEDINA...
AKRON...MANSFIELD...ASHLAND...WOOSTER...CANTON...MILLERSBURG...
MOUNT VERNON...ASHTABULA...ERIE
311 PM EDT THU APR 12 2012

...FREEZE WATCH IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS CANCELLED THE
FREEZE WATCH.

SOME PATCHY FROST WILL BE POSSIBLE IN LOW LYING AND SHELTERED
AREAS OVERNIGHT...BUT A HARD FREEZE IS NOT EXPECTED.

$$

OHZ013-014-022-023-033-PAZ002-003-130315-
/O.UPG.KCLE.FZ.A.0004.120413T0400Z-120413T1300Z/
/O.NEW.KCLE.FZ.W.0007.120413T0400Z-120413T1300Z/
GEAUGA-ASHTABULA INLAND-PORTAGE-TRUMBULL-MAHONING-SOUTHERN ERIE-
CRAWFORD PA-
INCLUDING THE CITIES OF...CHARDON...JEFFERSON...RAVENNA...
WARREN...YOUNGSTOWN...EDINBORO...MEADVILLE
311 PM EDT THU APR 12 2012

...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT
FRIDAY...

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A FREEZE
WARNING...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT
FRIDAY. THE FREEZE WATCH IS NO LONGER IN EFFECT.

* TEMPERATURES...IN THE LOWER 30S.

* TIMING...THE BEST CHANCE FOR FREEZING TEMPERATURES WILL BE 
  DURING THE EARLY MORNING HOURS TO AROUND SUNRISE. 

* IMPACTS...UNPROTECTED SEASONAL VEGETATION COULD BE DAMAGED OR 
  KILLED BY FROST AND FREEZING TEMPERATURES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING IS ISSUED WHEN FREEZING TEMPERATURES ARE
FORECAST TO THREATEN OUTDOOR PLANTS. IF YOU ARE IN THE WARNED AREA
YOU SHOULD HARVEST OR PROTECT TENDER VEGETATION. ALSO... POTTED
PLANTS NORMALLY LEFT OUTDOORS SHOULD BE COVERED OR BROUGHT INSIDE
AWAY FROM THE COLD. STAY TUNED TO WEATHER RADIO FOR FURTHER
DETAILS OR UPDATES.

&&

$$
2 follow-up statements
570 
WWUS71 KCLE 130135
NPWCLE

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE CLEVELAND OH
935 PM EDT THU APR 12 2012

OHZ013-014-022-023-033-PAZ002-003-130945-
/O.CON.KCLE.FZ.W.0007.120413T0400Z-120413T1300Z/
GEAUGA-ASHTABULA INLAND-PORTAGE-TRUMBULL-MAHONING-SOUTHERN ERIE-
CRAWFORD PA-
INCLUDING THE CITIES OF...CHARDON...JEFFERSON...RAVENNA...
WARREN...YOUNGSTOWN...EDINBORO...MEADVILLE
935 PM EDT THU APR 12 2012

...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM EDT FRIDAY...

* TEMPERATURES...IN THE LOWER 30S.

* TIMING...THE BEST CHANCE FOR FREEZING TEMPERATURES WILL BE FROM
  3 AM TO 9 AM.

* IMPACTS...UNPROTECTED SEASONAL VEGETATION COULD BE DAMAGED OR 
  KILLED BY FROST AND FREEZING TEMPERATURES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING IS ISSUED WHEN FREEZING TEMPERATURES ARE
FORECAST TO THREATEN OUTDOOR PLANTS. IF YOU ARE IN THE WARNED
AREA YOU SHOULD HARVEST OR PROTECT TENDER VEGETATION. ALSO...
POTTED PLANTS NORMALLY LEFT OUTDOORS SHOULD BE COVERED OR BROUGHT
INSIDE AWAY FROM THE COLD. STAY TUNED TO WEATHER RADIO FOR
FURTHER DETAILS OR UPDATES.

&&

$$
767 
WWUS71 KCLE 130958
NPWCLE

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE CLEVELAND OH
558 AM EDT FRI APR 13 2012

OHZ013-014-022-023-033-PAZ002-003-131300-
/O.CON.KCLE.FZ.W.0007.000000T0000Z-120413T1300Z/
GEAUGA-ASHTABULA INLAND-PORTAGE-TRUMBULL-MAHONING-SOUTHERN ERIE-
CRAWFORD PA-
INCLUDING THE CITIES OF...CHARDON...JEFFERSON...RAVENNA...
WARREN...YOUNGSTOWN...EDINBORO...MEADVILLE
558 AM EDT FRI APR 13 2012

...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING...

* TEMPERATURES...IN THE LOWER 30S.

* TIMING...THE BEST CHANCE FOR FREEZING TEMPERATURES WILL BE UNTIL
  9 AM.

* IMPACTS...UNPROTECTED SEASONAL VEGETATION COULD BE DAMAGED OR 
  KILLED BY FROST AND FREEZING TEMPERATURES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE WARNED AREA YOU SHOULD PROTECT TENDER
VEGETATION. STAY TUNED TO WEATHER RADIO FOR FURTHER DETAILS OR
UPDATES.

&&

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 12, 4:26 AM EDTFreeze WatchCLEAshland, Ashtabula, Cuyahoga, Geauga, Holmes, Knox and 10 more11 hr

Nearby

Freeze Warnings in Ohio, 2012Freeze Warnings in Pennsylvania, 2012Every freeze warning 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.