Alert archive / North Carolina / Freeze Warnings in 2011

Freeze Warning 1, NWS Greenville-Spartanburg, SC

March 24, 201112 counties in North Carolina

NWS Greenville-Spartanburg, SC issued this freeze warning at Mar 24, 2011, 3:09 AM EDT for 12 counties in North Carolina. It took effect at Mar 25, 2011, 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: Mar 24, 2011, 3:09 AM EDT (07:09 UTC)
In effect from: Mar 25, 2011, 12:00 AM EDT
Expired: Mar 25, 2011, 9:00 AM EDT
In force: 9 hr
Issued by: NWS Greenville-Spartanburg, SC

Counties Buncombe County, NC, Burke County, NC, Caldwell County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Jackson County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Swain County, NC, Transylvania County, NC

The radar

The Greer radar (KGSP), 84 km from the middle of the area, began a volume at 07:12 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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 7.2 hours before the alert went out and 262 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: 88 J/kg
Mixed-layer CIN: -77 J/kg
Mixed-layer LCL: 816 m above ground
0-6 km bulk shear: 81 kt
0-1 km storm-relative helicity: 249 m²/s²
0-3 km storm-relative helicity: 410 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this freeze warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Greenville-Spartanburg, SC wrote its last area forecast discussion before this freeze warning went out at Mar 24, 2:37 AM EDT, 32 minutes earlier.

Area forecast discussion, Mar 24, 2:37 AM EDT, 32 minutes before

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Hazardous weather outlook, Mar 23, 11:49 PM EDT, 3 hours 20 minutes before

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In the hours before

Special weather statement, Mar 23, 11:15 PM EDT, 3 hours 54 minutes before

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Special weather statement, Mar 23, 11:53 PM EDT, 3 hours 16 minutes before

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Special weather statement, Mar 24, 12:15 AM EDT, 2 hours 54 minutes before

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Special weather statement, Mar 24, 12:41 AM EDT, 2 hours 28 minutes before

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Special weather statement, Mar 24, 1:19 AM EDT, 1 hour 50 minutes before

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Special weather statement, Mar 24, 1:44 AM EDT, 1 hour 25 minutes before

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The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 23, 9:18 PM EDT	Special Weather Statement	GSP	Catawba, Iredell	27 min
Mar 23, 9:43 PM EDT	Special Weather Statement	GSP	Avery	47 min
Mar 23, 9:47 PM EDT	Special Weather Statement	GSP	Davie, Iredell	28 min
Mar 23, 9:53 PM EDT	Severe Thunderstorm Warning	GSP	Avery	24 min
Mar 23, 10:02 PM EDT	Severe Thunderstorm Warning	GSP	Davie	13 min
Mar 23, 10:22 PM EDT	Severe Thunderstorm Warning	GSP	Swain	42 min
Mar 23, 10:48 PM EDT	Special Weather Statement	GSP	Alexander, Caldwell, Davie, Iredell	42 min
Mar 23, 11:15 PM EDT	Special Weather Statement	GSP	Cabarrus, Catawba, Cleveland, Gaston, Lincoln, Mecklenburg and 2 more	45 min
Mar 23, 11:53 PM EDT	Special Weather Statement	GSP	Gaston, Mecklenburg	52 min
Mar 24, 12:15 AM EDT	Special Weather Statement	GSP	Cabarrus, Mecklenburg	45 min
Mar 24, 1:44 AM EDT	Special Weather Statement	GSP	Avery	31 min
Mar 24, 3:09 AM EDT	Frost Advisory	GSP	Alexander, Burke, Caldwell, Catawba, Davie, Iredell and 2 more	30 hr
Mar 24, 3:09 AM EDT	Lake Wind Advisory	GSP	Buncombe, Burke, Caldwell, Henderson, McDowell, Madison and 2 more	9 hr
Mar 24, 3:09 AM EDT	Wind Advisory	GSP	Avery, Burke, Caldwell, McDowell, Mitchell, Yancey	9 hr
Mar 24, 12:10 PM EDT	Lake Wind Advisory	GSP	Avery, Burke, Caldwell, McDowell, Mitchell, Yancey	6 hr
Mar 24, 12:41 AM EDT	Special Weather Statement	GSP	Abbeville, Anderson, Chester, Greenwood, Laurens, Union and 1 more	49 min
Mar 24, 1:19 AM EDT	Special Weather Statement	GSP	Abbeville, Chester, Greenwood, Laurens, Union	41 min

Nearby

Freeze Warnings in North Carolina, 2011 Every freeze warning in 2011

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.