Alert archive / North Carolina / Areal Flood Warnings in 2021

Areal Flood Warning 4, NWS Greenville-Spartanburg, SC

March 26, 2021Rowan County, North Carolina

NWS Greenville-Spartanburg, SC issued this areal flood warning at Mar 26, 2021, 3:49 PM EDT for Rowan County, North Carolina. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Mar 26, 2021, 3:49 PM EDT (19:49 UTC)
Expired
Mar 27, 2021, 12:51 AM EDT
In force
9 hr
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon
Flood severity
None

County Rowan County, NC

The radar

The Roanoke radar (KFCX), 153 km from the middle of the area, began a volume at 19:52 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, 7.8 hours before the alert went out and 73 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 12:00Z on 2021-03-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 151 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 12:00Z on 2021-03-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 260 square meters per square second.1939587897117Sfc1 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
151 J/kg
Mixed-layer CIN
-87 J/kg
Mixed-layer LCL
648 m above ground
0-6 km bulk shear
71 kt
0-1 km storm-relative helicity
260 m²/s²
0-3 km storm-relative helicity
323 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

As transmitted.

087 
WGUS42 KGSP 261949
FLWGSP

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Greenville-Spartanburg SC
349 PM EDT Fri Mar 26 2021

NCC159-270500-
/O.NEW.KGSP.FA.W.0004.210326T1949Z-210327T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Rowan NC-
349 PM EDT Fri Mar 26 2021

The National Weather Service in Greenville-Spartanburg has issued a

* Flood Warning for...
  Southwestern Rowan County in the piedmont of North Carolina...

* Until 100 AM EDT Saturday.

* At 349 PM EDT,   Due to continued runoff form recent heavy rain, 
  the river gauge at N. Second Creek above Statesville BLVD (US 70) 
  has exceeded minor flood stage some additional rise this evening 
  is expected.

* Farmland adjacent to N. Second Creek is flooded. Impacted roads 
  include: White, Lyerly, Upright, Graham, Hall, Childers, and Bear 
  Poplar Roads.

* Some locations that will experience flooding include...
  Kannapolis, Salisbury, China Grove, Spencer, Landis, Enochville, 
  High Rock Lake, Piedmont Research Station and Mount Ulla.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3564 8076 3578 8052 3577 8048 3573 8045
      3572 8037 3572 8033 3568 8033 3567 8040
      3556 8059 3550 8059 3551 8074

$$

WJM
2 follow-up statements
456 
WGUS82 KGSP 270432
FLSGSP

Flood Statement
National Weather Service Greenville-Spartanburg SC
1232 AM EDT Sat Mar 27 2021

NCC159-270500-
/O.CON.KGSP.FA.W.0004.000000T0000Z-210327T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Rowan NC-
1232 AM EDT Sat Mar 27 2021

...FLOOD WARNING REMAINS IN EFFECT UNTIL 1 AM EDT EARLY THIS MORNING 
FOR CENTRAL ROWAN COUNTY...

At 1232 AM EDT, gauge reports indicated flooding ongoing across the 
warned area.

Some locations that will experience flooding include...
  Salisbury, Spencer, High Rock Lake and Piedmont Research Station.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

When it is safe to do so, please report flooding or landslides 
threatening roads or property to the National Weather Service 
Greenville-Spartanburg by calling toll free, 1, 800, 2 6 7, 8 1 0 1, 
by posting on our Facebook page, or via Twitter using hashtag 
NWSGSP. Your message should describe the specific location where 
impacts occurred and the depth of flooding observed.

&&

LAT...LON 3568 8067 3578 8052 3577 8049 3577 8048
      3573 8045 3572 8041 3572 8039 3572 8037
      3572 8035 3572 8033 3570 8033 3569 8033
      3568 8033 3570 8041 3566 8049 3561 8055
      3562 8064

$$

Moore
002 
WGUS82 KGSP 270451
FLSGSP

Flood Statement
National Weather Service Greenville-Spartanburg SC
1251 AM EDT Sat Mar 27 2021

NCC159-270501-
/O.CAN.KGSP.FA.W.0004.000000T0000Z-210327T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Rowan NC-
1251 AM EDT Sat Mar 27 2021

...FLOOD WARNING FOR CENTRAL ROWAN COUNTY HAS BEEN REPLACED WITH A 
FLOOD ADVISORY...

LAT...LON 3568 8067 3578 8052 3577 8049 3577 8048
      3573 8045 3572 8041 3572 8039 3572 8037
      3572 8035 3572 8033 3570 8033 3569 8033
      3568 8033 3570 8041 3566 8049 3561 8055
      3562 8064

$$

Moore

What forecasters said that day

The local office's own words before this areal flood 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 areal flood warning went out at Mar 26, 2:40 PM EDT, 1 hour 9 minutes earlier.

Area forecast discussion, Mar 26, 2:40 PM EDT, 1 hour 9 minutes before
Area Forecast Discussion
National Weather Service Greenville-Spartanburg SC
240 PM EDT Fri Mar 26 2021

.SYNOPSIS...
An active weather pattern will continue this weekend as a
stationary front just south of our area lifts north as a warm front
on Saturday.  Another cold front arrives from the west on Sunday
with another round of thunderstorms.  This cold front crosses our
region late Sunday and Sunday night.  Expect cool and dry high
pressure to return early next week.

&&

.NEAR TERM /THROUGH SATURDAY/...
The afternoon is turning out quite nice across the FA as drying
hipres builds in from the north. The frontal zone to the south
remains activated with periods of strong convec, however, bndry has
shifted further south and will remain so thru the evening and most
of the overnight period. Not real worried about dense fg overnight
as sfc td/s will lower across the nrn zones and increasing cloud
cover from the south will help keep temps well abv normal. Yet, with
all the precip this morning, a few pockets of dense fg will be
possible esp across the mtn valleys and escarpment areas.

The moist warm front will lift across the area during the day and
expect widespread light showers shortly after or arnd daybreak. Tne
srn NC mtns will likely get the most rain amts of arnd half an inch,
but overall there shud be no sigfnt hydro impact as stream levels
have a chance to recover/lower. A linger thunder threat will be had
as elevated instability accompanies the showers. Not expecting very
strong storms, but a few could reach SPS levels during the
afternoon. Max temps will be a little cooler than today due to the
early widespread cloud cover, yet still reach abt 5-7 degrees abv
normal levels as sfc winds shift s/ly in the afternoon.

&&

.SHORT TERM /SATURDAY NIGHT THROUGH MONDAY/...
As of 215 PM EDT Friday: Guidance in good agreement, even the NAM
which usually does better with any lingering CAD, shows the warm
front lifting north of the area Saturday night. Shower chances ramp
up, especially across the mountains in the developing moist
southerly flow. Lows will be nearly 20 degrees above normal.
Guidance is also in good agreement showing the cold front crossing
the area during the day Sunday, and could line up well with peak
heating. There is definitely a concern for another round of
organized severe tstms with this front. Bulk and effective shear
will be strong thanks to an intense LLJ. SREF probabilities are high
for surface, mixed layer, and most unstable CAPE values over 500
J/kg, but low for over 1000. Can't rule out a quasi-linear and/or
supercell storm mode depending on exactly how much CAPE can be
realized. So in light of that, the SPC Day 3 Convective Outlook has
the entire CWFA in a Slight Risk. Will keep the threat mention in
the HWO. Otherwise, Sunday will be warm and windy, and even feel a
little humid, with dew points into the 60s. Highs in the mid 70s to
80 east of the mountains. Precip chances taper off quickly Sunday
night as the front moves east with lingering breezy conditions.
Temps drop back to near-normal Sunday night in the wake of the cold
front. Dry conditions with diminishing winds expected Monday as high
pressure builds in. Highs will be near to slightly below normal.

&&

.LONG TERM /MONDAY NIGHT THROUGH FRIDAY/...
As of 2 pm EDT Friday: Good agreement amongst global models provides
above normal confidence in the extended period. The progressive
pattern will continue into through the end of the week. A cool
continental air mass will modify during the first half of the week
while moisture slowly increases. A weak low tracks from the northern
Gulf coast Monday evening to off the Carolina coast late Tuesday.  A
transient 1030 mb high will maintain the dry air mass and large
diurnal swing in temperatures into Tuesday. By Wednesday, return
flow behind the high will support increasing low level moisture off
the Atlantic basin for at least increasing clouds for southern areas
if not supporting some shower activity.

Probably the biggest story is the emergence of a full latitude
trough and associated frontal system to impact the area Wednesday
night into Thursday.  It is too early for the details but this has
the potential to be a vigorous cold front with widespread
precipitation. Therefore, increasing the POPs ahead of this cold
front.  Temperatures will likely fall below normal at the end of the
week behind the front with Canadian air mass settling into the
region.

&&

.AVIATION /19Z FRIDAY THROUGH WEDNESDAY/...
At KCLT and elsewhere: Lingering MVFR CIGs at KCLT will continue to
scatter out this afternoon and all sites will remain dry and VFR
thru most of the overnight. A moist warm front will lift over the
region Sat and bring periods of -shra and lowering CIGs mainly
across the wrn zones and mtn valleys thru the latter TAF period.
Winds will become ne/ly to e/ly during the later overnight as hipres
builds in from the north...then expect afternoon winds at KCLT to
veer s/ly to sw/ly as a weak sfc ridge breaks down.

Outlook: Thunderstorms bringing flight restrictions are probable
Sunday. VFR conds return Mon with a couple more moist systems and
flight restrictions affecting the region beginning Tue.

Confidence Table...

            18-24Z        00-06Z        06-12Z        12-18Z
KCLT       High  96%     High 100%     High  95%     High  99%
KGSP       High 100%     High 100%     High 100%     High  93%
KAVL       High 100%     High 100%     High 100%     High  93%
KHKY       High 100%     High 100%     High 100%     High 100%
KGMU       High 100%     High 100%     High 100%     High  90%
KAND       High 100%     High 100%     High  98%     High  93%

The percentage reflects the number of guidance members agreeing
with the scheduled TAF issuance flight rule category. Complete hourly
experimental aviation forecast consistency tables are available at
the following link:

www.weather.gov/gsp/aviation

&&

.GSP WATCHES/WARNINGS/ADVISORIES...
GA...None.
NC...None.
SC...None.

&&

SYNOPSIS...DEO
NEAR TERM...SBK
SHORT TERM...RWH
LONG TERM...DEO
AVIATION...SBK
Hazardous weather outlook, Mar 26, 11:58 AM EDT, 3 hours 51 minutes before
Hazardous Weather Outlook
National Weather Service Greenville-Spartanburg SC
1158 AM EDT Fri Mar 26 2021

GAZ029-NCZ082-SCZ009-011>014-019-271600-
Elbert-Union NC-York-Abbeville-Laurens-Union SC-Chester-Greenwood-
1158 AM EDT Fri Mar 26 2021

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

.DAY ONE...This afternoon and tonight.

Isolated thunderstorms are possible through the early afternoon
across the southern piedmont of the Carolinas and northeast Georgia.
Cloud to ground lightning will be the biggest threat.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Another round of thunderstorms is expected on Sunday. Some of these
storms may become severe, producing damaging wind and large hail.

.SPOTTER INFORMATION STATEMENT...

None.

GAZ010-017-018-026-028-NCZ033-035>037-048>053-056>059-062>065-
068>072-501>510-SCZ001>008-010-271600-
Rabun-Habersham-Stephens-Franklin-Hart-Avery-Alexander-Iredell-Davie-
Madison-Yancey-Mitchell-Swain-Haywood-Buncombe-Catawba-Rowan-Graham-
Northern Jackson-Macon-Southern Jackson-Transylvania-Henderson-
Cleveland-Lincoln-Gaston-Mecklenburg-Cabarrus-Caldwell Mountains-
Greater Caldwell-Burke Mountains-Greater Burke-McDowell Mountains-
Eastern McDowell-Rutherford Mountains-Greater Rutherford-
Polk Mountains-Eastern Polk-Oconee Mountains-Pickens Mountains-
Greenville Mountains-Greater Oconee-Greater Pickens-
Greater Greenville-Spartanburg-Cherokee-Anderson-
1158 AM EDT Fri Mar 26 2021

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

.DAY ONE...This afternoon and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Another round of thunderstorms is expected on Sunday. Some of these
storms may become severe, producing damaging wind and large hail.

.SPOTTER INFORMATION STATEMENT...

None.

Krentz

In the hours before

Local storm report, Mar 26, 10:00 AM EDT, 5 hours 49 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1000 AM EDT FRI MAR 26 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0947 AM     HAIL             WARE SHOALS             34.39N 82.24W
03/26/2021  E1.00 INCH       GREENWOOD          SC   TRAINED SPOTTER

            NICKEL TO QUARTER SIZED HAIL THAT FELL FOR OVER 2
            MINUTES.

&&

OUTLAW

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 25, 9:20 PM EDTAreal Flood WarningGSPMacon9 hr
Mar 25, 9:48 PM EDTAreal Flood WarningGSPHenderson, Transylvania14 hr
Mar 25, 10:18 PM EDTRiver Flood WarningGSPBuncombe, Henderson59 hr
Mar 25, 10:24 PM EDTAreal Flood AdvisoryGSPHaywood, Jackson8 hr
Mar 25, 10:29 PM EDTRiver Flood AdvisoryGSPMadison3 hr
Mar 25, 10:45 PM EDTAreal Flood AdvisoryGSPBuncombe, McDowell6 hr
Mar 25, 10:50 PM EDTRiver Flood AdvisoryGSPBuncombe64 hr
Mar 25, 10:57 PM EDTRiver Flood WarningGSPBuncombe6 hr
Mar 25, 11:42 PM EDTSpecial Weather StatementGSPCleveland, Gaston, Lincoln48 min
Mar 26, 12:27 AM EDTRiver Flood AdvisoryGSPSwain11 hr
Mar 26, 1:13 AM EDTAreal Flood AdvisoryGSPGraham, Swain5 hr
Mar 26, 1:45 AM EDTRiver Flood WarningGSPMadison13 hr
Mar 26, 2:23 AM EDTSpecial Weather StatementGSPCatawba, Cleveland, Lincoln, Polk, Rutherford37 min
Mar 26, 2:50 AM EDTAreal Flood AdvisoryGSPPolk, Rutherford14 hr
Mar 26, 2:55 AM EDTRiver Flood WarningGSPGaston51 hr
Mar 26, 2:57 AM EDTSpecial Weather StatementGSPCatawba, Iredell, Lincoln33 min
Mar 26, 3:00 AM EDTSpecial Weather StatementGSPCleveland30 min
Mar 26, 3:05 AM EDTRiver Flood AdvisoryGSPMadison8 hr
Mar 26, 3:21 AM EDTRiver Flood WarningGSPCleveland27 hr
Mar 26, 3:28 AM EDTSpecial Weather StatementGSPCleveland, Gaston, Lincoln32 min
Mar 26, 3:52 AM EDTAreal Flood AdvisoryGSPCabarrus25 hr
Mar 26, 3:56 AM EDTSpecial Weather StatementGSPCabarrus, Gaston, Rowan34 min
Mar 26, 4:12 AM EDTAreal Flood AdvisoryGSPCabarrus, Iredell, Mecklenburg, Rowan12 hr
Mar 26, 4:49 AM EDTAreal Flood AdvisoryGSPMacon, Swain24 hr
Mar 26, 8:50 AM EDTAreal Flood AdvisoryGSPAlexander, Catawba, Iredell21 hr

Nearby

Areal Flood Warnings in North Carolina, 2021Every areal flood warning in 2021

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.