Alert archive / North Carolina / Flash Flood Watches in 2017

Flash Flood Watch 4, NWS Greenville-Spartanburg, SC

May 24, 201728 counties in North Carolina; 8 counties in South Carolina; 6 counties in Georgia

NWS Greenville-Spartanburg, SC issued this flash flood watch at May 24, 2017, 4:23 AM EDT for 28 counties in North Carolina; 8 counties in South Carolina; 6 counties in Georgia. It took effect at May 24, 2017, 10:00 AM EDT. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: May 24, 2017, 4:23 AM EDT (08:23 UTC)
In effect from: May 24, 2017, 10:00 AM EDT
Expired: May 24, 2017, 10:00 PM EDT
In force: 12 hr
Issued by: NWS Greenville-Spartanburg, SC
Flood severity: None

All 42 counties

Elbert County, GA, Franklin County, GA, Habersham County, GA, Hart County, GA, Rabun 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, Graham County, NC, Haywood County, NC, Henderson County, NC, Iredell County, NC, Jackson County, NC, Lincoln County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Mecklenburg County, NC, Mitchell County, NC, Polk County, NC, Rowan County, NC, Rutherford County, NC, Swain 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), 40 km from the middle of the area, began a volume at 08:24 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

Roanoke, VA (KRNK), launched 00:00Z, 8.4 hours before the alert went out and 319 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: 574 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 159 m²/s²
0-3 km storm-relative helicity: 272 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 May 24, 4:16 AM EDT, 7 minutes earlier.

Area forecast discussion, May 24, 4:16 AM EDT, 7 minutes before

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Hazardous weather outlook, May 23, 3:10 PM EDT, 13 hours 13 minutes before

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In the hours before

Special weather statement, May 23, 10:45 PM EDT, 5 hours 38 minutes before

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Special weather statement, May 23, 11:28 PM EDT, 4 hours 55 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
May 24, 4:26 AM EDT	Areal Flood Advisory	GSP	Burke, Caldwell	6 hr
May 24, 11:04 AM EDT	Special Weather Statement	GSP	Graham	71 min
May 24, 11:10 AM EDT	Severe Thunderstorm Warning	GSP	Graham, Swain	47 min
May 24, 12:18 PM EDT	Special Weather Statement	GSP	Graham	42 min
May 24, 1:01 PM EDT	Special Weather Statement	GSP	Jackson	44 min
May 24, 2:39 PM EDT	Special Weather Statement	GSP	McDowell	36 min
May 24, 2:47 PM EDT	Severe Thunderstorm Warning	GSP	McDowell, Polk, Rutherford	43 min
May 24, 3:11 PM EDT	Special Weather Statement	GSP	Iredell	34 min
May 24, 3:41 PM EDT	Tornado Warning	GSP	Davie, Iredell, Rowan	34 min
May 24, 3:59 PM EDT	Areal Flood Advisory	GSP	Burke, McDowell	3 hr
May 24, 4:00 PM EDT	Severe Thunderstorm Warning	GSP	Cabarrus, Mecklenburg	45 min
May 24, 4:12 PM EDT	Tornado Warning	GSP	Davie, Iredell	18 min
May 24, 4:15 PM EDT	Tornado Warning	GSP	Alexander, Iredell	31 min
May 24, 4:16 PM EDT	Tornado Warning	GSP	Union	29 min
May 24, 4:21 PM EDT	Areal Flood Advisory	GSP	Mecklenburg	6 hr
May 24, 4:23 PM EDT	Tornado Warning	GSP	Burke, McDowell	37 min
May 24, 4:57 PM EDT	Special Weather Statement	GSP	Stanly	33 min
May 24, 4:58 PM EDT	Areal Flood Advisory	GSP	Burke, Caldwell	3 hr
May 24, 5:32 PM EDT	Areal Flood Advisory	GSP	McDowell, Rutherford	3 hr
May 24, 6:04 PM EDT	Flash Flood Warning	GSP	McDowell, Rutherford	6 hr
May 24, 6:17 PM EDT	Special Weather Statement	GSP	Burke	43 min
May 24, 6:39 PM EDT	Special Weather Statement	GSP	Caldwell	36 min
May 24, 6:46 PM EDT	Special Weather Statement	GSP	Polk, Rutherford	44 min
May 24, 7:28 PM EDT	Areal Flood Advisory	GSP	Henderson	107 min
May 23, 11:28 PM EDT	Special Weather Statement	GSP	Oconee	32 min
May 24, 12:57 PM EDT	Special Weather Statement	GSP	Abbeville	48 min
May 24, 1:35 PM EDT	Special Weather Statement	GSP	Laurens	40 min
May 24, 1:58 PM EDT	Special Weather Statement	GSP	Anderson	47 min
May 24, 2:38 PM EDT	Special Weather Statement	GSP	Union	37 min
May 24, 2:53 PM EDT	Tornado Warning	GSP	Laurens, Union	23 min
May 24, 3:12 PM EDT	Special Weather Statement	GSP	Cherokee	33 min
May 24, 4:24 PM EDT	Special Weather Statement	GSP	Pickens	51 min
May 24, 4:45 PM EDT	Special Weather Statement	GSP	Oconee	45 min
May 24, 5:24 PM EDT	Special Weather Statement	GSP	Pickens	51 min
May 24, 6:02 PM EDT	Special Weather Statement	GSP	Anderson	28 min
May 24, 6:16 PM EDT	Special Weather Statement	GSP	Greenville	29 min
May 24, 6:36 PM EDT	Special Weather Statement	GSP	Anderson	24 min
May 24, 7:05 PM EDT	Special Weather Statement	GSP	Abbeville	25 min
May 23, 10:45 PM EDT	Special Weather Statement	GSP	Franklin, Habersham, Stephens	45 min
May 24, 3:33 PM EDT	Special Weather Statement	GSP	Franklin, Hart	27 min

Nearby

Flash Flood Watches in North Carolina, 2017 Flash Flood Watches in South Carolina, 2017 Flash Flood Watches in Georgia, 2017 Every flash flood watch in 2017

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.