Alert archive / South Carolina / Flash Flood Watches in 2016

Flash Flood Watch 6, NWS Greenville-Spartanburg, SC

September 1, 20164 counties in North Carolina; 6 counties in South Carolina; Elbert County, Georgia

NWS Greenville-Spartanburg, SC issued this flash flood watch at Sep 1, 2016, 12:23 PM EDT for 4 counties in North Carolina; 6 counties in South Carolina; Elbert County, Georgia. It took effect at Sep 2, 2016, 6:00 AM EDT. It was in force for 16 hr.

The area

The counties it named.

The facts

Issued: Sep 1, 2016, 12:23 PM EDT (16:23 UTC)
In effect from: Sep 2, 2016, 6:00 AM EDT
Expired: Sep 2, 2016, 10:20 PM EDT
In force: 16 hr
Issued by: NWS Greenville-Spartanburg, SC
Flood severity: None

Counties Elbert County, GA, Cabarrus County, NC, Gaston County, NC, Mecklenburg County, NC, Union County, NC, Abbeville County, SC, Chester County, SC, Greenwood County, SC, Laurens County, SC, Union County, SC, York County, SC

The radar

The Greer radar (KGSP), 67 km from the middle of the area, began a volume at 16:25 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 12:00Z, 4.4 hours before the alert went out and 207 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: 375 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 974 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 59 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 flash 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 flash flood watch went out at Sep 1, 12:07 PM EDT, 16 minutes earlier.

Area forecast discussion, Sep 1, 12:07 PM EDT, 16 minutes before

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Hazardous weather outlook, Sep 1, 5:43 AM EDT, 6 hours 40 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 1, 2:07 PM EDT	Special Weather Statement	GSP	Iredell	23 min
Sep 1, 2:55 PM EDT	Special Weather Statement	GSP	Avery	35 min
Sep 1, 3:56 PM EDT	Special Weather Statement	GSP	Catawba	34 min
Sep 1, 4:04 PM EDT	Special Weather Statement	GSP	Rutherford	26 min
Sep 1, 4:39 PM EDT	Special Weather Statement	GSP	Catawba, Lincoln	36 min
Sep 1, 5:05 PM EDT	Special Weather Statement	GSP	Mecklenburg	25 min
Sep 1, 5:16 PM EDT	Special Weather Statement	GSP	Mecklenburg	29 min
Sep 1, 5:28 PM EDT	Areal Flood Advisory	GSP	Mecklenburg	4 hr
Sep 1, 5:52 PM EDT	Special Weather Statement	GSP	Mecklenburg	23 min
Sep 1, 6:25 PM EDT	Special Weather Statement	GSP	Union	50 min
Sep 1, 4:01 PM EDT	Special Weather Statement	GSP	Oconee	29 min
Sep 1, 4:43 PM EDT	Special Weather Statement	GSP	Spartanburg	32 min
Sep 1, 5:07 PM EDT	Areal Flood Advisory	GSP	Spartanburg	113 min
Sep 1, 5:23 PM EDT	Special Weather Statement	GSP	York	37 min
Sep 1, 5:54 PM EDT	Areal Flood Advisory	GSP	York	2 hr
Sep 1, 6:20 PM EDT	Special Weather Statement	GSP	Anderson	25 min
Sep 1, 6:39 PM EDT	Special Weather Statement	GSP	Laurens	36 min
Sep 1, 4:47 PM EDT	Special Weather Statement	GSP	Rabun	28 min

Nearby

Flash Flood Watches in South Carolina, 2016 Flash Flood Watches in North Carolina, 2016 Flash Flood Watches in Georgia, 2016 Every flash flood watch in 2016

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.