Alert archive / North Carolina / Flash Flood Watches in 2018

Flash Flood Watch 3, NWS Greenville-Spartanburg, SC

April 15, 201811 counties in North Carolina

NWS Greenville-Spartanburg, SC issued this flash flood watch at Apr 15, 2018, 8:11 PM EDT for 11 counties in North Carolina. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Apr 15, 2018, 8:11 PM EDT (00:11 UTC)
Expired
Apr 15, 2018, 10:53 PM EDT
In force
3 hr
Issued by
NWS Greenville-Spartanburg, SC
Flood severity
None

Counties Alexander County, NC, Avery County, NC, Burke County, NC, Caldwell County, NC, Catawba County, NC, Davie County, NC, Iredell County, NC, McDowell County, NC, Mitchell County, NC, Rowan County, NC, Yancey County, NC

The radar

The Greer radar (KGSP), 128 km from the middle of the area, began a volume at 00:11 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, 0.2 hours before the alert went out and 142 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-pSkew-T log-p diagram, Greensboro/Hi Pt, NC at 00:00Z on 2018-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 9 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 00:00Z on 2018-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -81 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
9 J/kg
Mixed-layer CIN
-92 J/kg
Mixed-layer LCL
636 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
-81 m²/s²
0-3 km storm-relative helicity
-42 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 Apr 15, 5:32 PM EDT, 2 hours 39 minutes earlier.

Area forecast discussion, Apr 15, 5:32 PM EDT, 2 hours 39 minutes before
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Hazardous weather outlook, Apr 15, 12:17 PM EDT, 7 hours 54 minutes before
Hazardous Weather Outlook
National Weather Service Greenville-Spartanburg SC
1217 PM EDT Sun Apr 15 2018

NCZ035>037-056-057-068>072-082-501>510-SCZ003-006>009-161630-
Alexander-Iredell-Davie-Catawba-Rowan-Cleveland-Lincoln-Gaston-
Mecklenburg-Cabarrus-Union-Caldwell Mountains-Greater Caldwell-
Burke Mountains-Greater Burke-McDowell Mountains-Eastern McDowell-
Rutherford Mountains-Greater Rutherford-Polk Mountains-Eastern Polk-
Greenville Mountains-Greater Greenville-Spartanburg-Cherokee-York-
1217 PM EDT Sun Apr 15 2018

...FLASH FLOOD WATCH IN EFFECT UNTIL 8 PM EDT THIS EVENING...
...TORNADO WATCH 52 IN EFFECT UNTIL 7 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for piedmont North Carolina,
western North Carolina and upstate South Carolina.

.DAY ONE...This Afternoon and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Tornado Watch.
   Flash Flood Watch.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

..Monday...No hazardous weather is expected at this time.
..Tuesday...No hazardous weather is expected at this time.
..Wednesday...No hazardous weather is expected at this time.
..Thursday...No hazardous weather is expected at this time.
..Friday...No hazardous weather is expected at this time.
..Saturday...No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

None.

GAZ010-NCZ064-065-SCZ001-002-161630-
Rabun-Transylvania-Henderson-Oconee Mountains-Pickens Mountains-
1217 PM EDT Sun Apr 15 2018

...FLASH FLOOD WATCH IN EFFECT UNTIL 8 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for northeast Georgia, western
North Carolina and upstate South Carolina.

.DAY ONE...This Afternoon and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

..Monday...No hazardous weather is expected at this time.
..Tuesday...No hazardous weather is expected at this time.
..Wednesday...No hazardous weather is expected at this time.
..Thursday...No hazardous weather is expected at this time.
..Friday...No hazardous weather is expected at this time.
..Saturday...No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

None.

GAZ017-018-026-028-029-SCZ004-005-161630-
Habersham-Stephens-Franklin-Hart-Elbert-Greater Oconee-
Greater Pickens-
1217 PM EDT Sun Apr 15 2018

This Hazardous Weather Outlook is for northeast Georgia and upstate
South Carolina.

.DAY ONE...This Afternoon and Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

..Monday...No hazardous weather is expected at this time.
..Tuesday...No hazardous weather is expected at this time.
..Wednesday...No hazardous weather is expected at this time.
..Thursday...No hazardous weather is expected at this time.
..Friday...No hazardous weather is expected at this time.
..Saturday...No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

None.

SCZ010>014-019-161630-
Anderson-Abbeville-Laurens-Union-Chester-Greenwood-
1217 PM EDT Sun Apr 15 2018

...TORNADO WATCH 52 IN EFFECT UNTIL 7 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for upstate South Carolina.

.DAY ONE...This Afternoon and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Tornado Watch.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

..Monday...No hazardous weather is expected at this time.
..Tuesday...No hazardous weather is expected at this time.
..Wednesday...No hazardous weather is expected at this time.
..Thursday...No hazardous weather is expected at this time.
..Friday...No hazardous weather is expected at this time.
..Saturday...No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

None.

NCZ048-051>053-058-059-161630-
Madison-Swain-Haywood-Buncombe-Graham-Northern Jackson-
1217 PM EDT Sun Apr 15 2018

...FREEZE WATCH IN EFFECT FROM MIDNIGHT EDT TONIGHT THROUGH MONDAY
MORNING...

This Hazardous Weather Outlook is for western North Carolina.

.DAY ONE...This Afternoon and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Freeze Watch.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

..Monday...No hazardous weather is expected at this time.
..Tuesday...No hazardous weather is expected at this time.
..Wednesday...No hazardous weather is expected at this time.
..Thursday...No hazardous weather is expected at this time.
..Friday...No hazardous weather is expected at this time.
..Saturday...No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

None.

NCZ049-050-161630-
Yancey-Mitchell-
1217 PM EDT Sun Apr 15 2018

This Hazardous Weather Outlook is for western North Carolina.

.DAY ONE...This Afternoon and Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

..Monday...No hazardous weather is expected at this time.
..Tuesday...No hazardous weather is expected at this time.
..Wednesday...No hazardous weather is expected at this time.
..Thursday...No hazardous weather is expected at this time.
..Friday...No hazardous weather is expected at this time.
..Saturday...No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

None.

NCZ033-161630-
Avery-
1217 PM EDT Sun Apr 15 2018

...FLASH FLOOD WATCH IN EFFECT UNTIL 8 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for western North Carolina.

.DAY ONE...This Afternoon and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

..Monday...No hazardous weather is expected at this time.
..Tuesday...No hazardous weather is expected at this time.
..Wednesday...No hazardous weather is expected at this time.
..Thursday...No hazardous weather is expected at this time.
..Friday...No hazardous weather is expected at this time.
..Saturday...No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

None.

NCZ062-063-161630-
Macon-Southern Jackson-
1217 PM EDT Sun Apr 15 2018

...FLASH FLOOD WATCH IN EFFECT UNTIL 8 PM EDT THIS EVENING...
...FREEZE WATCH IN EFFECT FROM MIDNIGHT EDT TONIGHT THROUGH MONDAY
MORNING...

This Hazardous Weather Outlook is for western North Carolina.

.DAY ONE...This Afternoon and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.
   Freeze Watch.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

..Monday...No hazardous weather is expected at this time.
..Tuesday...No hazardous weather is expected at this time.
..Wednesday...No hazardous weather is expected at this time.
..Thursday...No hazardous weather is expected at this time.
..Friday...No hazardous weather is expected at this time.
..Saturday...No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

None.

In the hours before

Local storm report, Apr 15, 7:48 PM EDT, 23 minutes before
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Local storm report, Apr 15, 7:50 PM EDT, 21 minutes before
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Local storm report, Apr 15, 7:59 PM EDT, 12 minutes before
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Local storm report, Apr 15, 8:01 PM EDT, 10 minutes before
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Local storm report, Apr 15, 8:08 PM EDT, 3 minutes before
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Local storm report, Apr 15, 8:11 PM EDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 15, 8:58 PM EDTAreal Flood AdvisoryGSPAlexander, Burke, Caldwell, Catawba2 hr
Apr 16, 1:49 AM EDTAreal Flood WarningGSPBurke6 hr
Apr 16, 4:13 AM EDTFreeze WarningGSPBuncombe, Henderson, Madison, Transylvania29 hr
Apr 16, 4:13 AM EDTWind AdvisoryGSPAvery, Mitchell, Yancey16 hr
Apr 16, 2:35 PM EDTFrost AdvisoryGSPAlexander, Burke, Cabarrus, Caldwell, Catawba, Cleveland and 10 more18 hr

Nearby

Flash Flood Watches in North Carolina, 2018Every flash flood watch in 2018

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.