Alert archive / Tennessee / Freeze Watches in 2012

Freeze Watch 1, NWS Nashville, TN

April 9, 20129 counties in Tennessee

NWS Nashville, TN issued this freeze watch at Apr 9, 2012, 9:12 PM CDT for 9 counties in Tennessee. It took effect at Apr 11, 2012, 4:00 AM CDT. It was in force for .

The area

The counties it named.

The facts

Issued: Apr 9, 2012, 9:12 PM CDT (02:12 UTC)
In effect from: Apr 11, 2012, 4:00 AM CDT
Expired: Apr 10, 2012, 2:11 PM CDT
In force
Issued by: NWS Nashville, TN

Counties Cumberland County, TN, Fentress County, TN, Grundy County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Van Buren County, TN, Warren County, TN, White County, TN

The radar

The Nashville radar (KOHX), 112 km from the middle of the area, began a volume at 02:12 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

Nashville Metro, TN (KBNA), launched 00:00Z, 2.2 hours before the alert went out and 113 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: 3212 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 104 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 Nashville, TN wrote its last area forecast discussion before this freeze watch went out at Apr 9, 9:02 PM CDT, 10 minutes earlier.

Area forecast discussion, Apr 9, 9:02 PM CDT, 10 minutes before

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Hazardous weather outlook, Apr 9, 9:03 PM CDT, 9 minutes before

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In the hours before

Special weather statement, Apr 9, 3:42 PM CDT, 5 hours 30 minutes before

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The office that day

Everything else NWS Nashville, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 10, 3:56 AM CDT	Frost Advisory	OHX	Bedford, Benton, Cannon, Cheatham, Clay, Coffee and 27 more	27 hr
Apr 10, 2:11 PM CDT	Freeze Watch	OHX	Bedford, Benton, Cannon, Cheatham, Clay, Coffee and 33 more	22 hr
Apr 10, 2:11 PM CDT	Freeze Warning	OHX	Cumberland, Fentress, Overton, Pickett, Putnam, White	17 hr

Nearby

Freeze Watches in Tennessee, 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.