Alert archive / North Carolina / Winter Storm Warnings in 2009

Winter Storm Warning 4, NWS Greenville-Spartanburg, SC

March 1, 200925 counties in North Carolina; 8 counties in South Carolina; 4 counties in Georgia

NWS Greenville-Spartanburg, SC issued this winter storm warning at Mar 1, 2009, 5:18 AM EST for 25 counties in North Carolina; 8 counties in South Carolina; 4 counties in Georgia. It took effect at Mar 1, 2009, 7:00 AM EST. It was in force for 22 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 1, 2009, 5:18 AM EST (10:18 UTC)
In effect from: Mar 1, 2009, 7:00 AM EST
Expired: Mar 2, 2009, 4:44 AM EST
In force: 22 hr
Issued by: NWS Greenville-Spartanburg, SC

All 37 counties

Elbert County, GA, Franklin County, GA, Hart County, GA, Stephens County, GA, Alexander County, NC, Avery County, NC, Buncombe County, NC, Burke County, NC, Cabarrus County, NC, Caldwell County, NC, Catawba County, NC, Cleveland County, NC, Davie County, NC, Gaston County, NC, Haywood County, NC, Henderson County, NC, Iredell County, NC, Jackson County, NC, Lincoln County, NC, Madison County, NC, McDowell County, NC, Mecklenburg County, NC, Mitchell County, NC, Polk County, NC, Rowan County, NC, Rutherford County, NC, Transylvania County, NC, Union County, NC, Yancey County, NC, Abbeville County, SC, Anderson County, SC, Cherokee County, SC, Chester County, SC, Greenwood County, SC, Laurens County, SC, Union County, SC, York County, SC

The radar

The Greer radar (KGSP), 50 km from the middle of the area, began a volume at 10:17 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, 10.3 hours before the alert went out and 202 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: 3 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 442 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 450 m²/s²
0-3 km storm-relative helicity: 934 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 winter storm 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 winter storm warning went out at Mar 1, 4:34 AM EST, 44 minutes earlier.

Area forecast discussion, Mar 1, 4:34 AM EST, 44 minutes before

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Hazardous weather outlook, Feb 28, 6:45 PM EST, 10 hours 33 minutes before

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In the hours before

Special weather statement, Mar 1, 4:18 AM EST, 1 hour 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 1, 5:18 AM EST	Winter Weather Advisory	GSP	Graham, Haywood, Jackson, Macon, Madison, Swain and 1 more	22 hr
Mar 1, 3:19 PM EST	Areal Flood Warning	GSP	Union	3 hr
Mar 1, 3:57 PM EST	Areal Flood Warning	GSP	Cabarrus, Mecklenburg	6 hr
Mar 1, 6:16 PM EST	Areal Flood Warning	GSP	Union	3 hr

Nearby

Winter Storm Warnings in North Carolina, 2009 Winter Storm Warnings in South Carolina, 2009 Winter Storm Warnings in Georgia, 2009 Every winter storm warning in 2009

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.