Alert archive / North Carolina / Flood Watches in 2009

Flood Watch 2, NWS Greenville-Spartanburg, SC

September 20, 200915 counties in North Carolina; 4 counties in Georgia

NWS Greenville-Spartanburg, SC issued this flood watch at Sep 20, 2009, 6:19 PM EDT for 15 counties in North Carolina; 4 counties in Georgia. It was in force for 36 hr.

The area

The counties it named.

The facts

Issued: Sep 20, 2009, 6:19 PM EDT (22:19 UTC)
Expired: Sep 22, 2009, 6:00 AM EDT
In force: 36 hr
Issued by: NWS Greenville-Spartanburg, SC
Flood severity: None

Counties Franklin County, GA, Habersham County, GA, Rabun County, GA, Stephens County, GA, Avery County, NC, Buncombe County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Jackson County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Mitchell County, NC, Polk County, NC, Rutherford County, NC, Swain County, NC, Transylvania County, NC, Yancey County, NC

The radar

The Greer radar (KGSP), 75 km from the middle of the area, began a volume at 22:22 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.3 hours before the alert went out and 269 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: 977 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 520 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 132 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 flood watch 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 flood watch went out at Sep 20, 6:09 PM EDT, 10 minutes earlier.

Area forecast discussion, Sep 20, 6:09 PM EDT, 10 minutes before

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Hazardous weather outlook, Sep 20, 3:28 PM EDT, 2 hours 51 minutes before

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In the hours before

Local storm report, Sep 20, 1:09 PM EDT, 5 hours 10 minutes before

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Local storm report, Sep 20, 1:56 PM EDT, 4 hours 23 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
Sep 20, 12:05 AM EDT	Areal Flood Advisory	GSP	Henderson, Polk	115 min
Sep 20, 12:40 AM EDT	Flash Flood Warning	GSP	Henderson, Polk	3 hr
Sep 20, 2:14 AM EDT	Areal Flood Advisory	GSP	Transylvania	106 min
Sep 20, 3:30 AM EDT	Flash Flood Warning	GSP	Henderson, Polk, Rutherford	3 hr
Sep 20, 3:41 AM EDT	Areal Flood Advisory	GSP	Jackson	109 min
Sep 20, 4:30 AM EDT	Flash Flood Warning	GSP	Henderson, Jackson, Macon, Transylvania	4 hr
Sep 20, 6:19 AM EDT	Areal Flood Warning	GSP	Henderson, Polk, Rutherford	4 hr
Sep 20, 7:28 AM EDT	River Flood Warning	GSP	Henderson, Transylvania	4 days
Sep 20, 8:14 AM EDT	Areal Flood Warning	GSP	Henderson, Jackson, Macon, Transylvania	4 hr
Sep 20, 11:59 AM EDT	Areal Flood Warning	GSP	Henderson, Jackson, Macon, Polk, Transylvania	6 hr
Sep 20, 5:32 PM EDT	Areal Flood Warning	GSP	Jackson, Macon	3 hr
Sep 20, 6:07 AM EDT	Flash Flood Warning	GSP	Oconee	3 hr
Sep 20, 9:34 AM EDT	Areal Flood Advisory	GSP	Habersham	56 min
Sep 20, 10:28 AM EDT	Areal Flood Advisory	GSP	Stephens	62 min
Sep 20, 10:39 AM EDT	Flash Flood Warning	GSP	Stephens	3 hr
Sep 20, 2:31 PM EDT	Areal Flood Warning	GSP	Stephens	3 hr

Nearby

Flood Watches in North Carolina, 2009 Flood Watches in Georgia, 2009 Flood Watches in South Carolina, 2009 Every flood watch 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.