Alert archive / North Carolina / Special Weather Statements in 2011

Special Weather Statement, NWS Greenville-Spartanburg, SC

April 9, 2011Madison County, North Carolina

NWS Greenville-Spartanburg, SC issued this special weather statement at Apr 9, 2011, 10:01 PM EDT for Madison County, North Carolina. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 9, 2011, 10:01 PM EDT (02:01 UTC)
Expired: Apr 9, 2011, 10:45 PM EDT
In force: 44 min
Issued by: NWS Greenville-Spartanburg, SC

County Madison County, NC

The radar

The Knoxville radar (KMRX), 77 km from the middle of the area, began a volume at 02:02 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, 2.0 hours before the alert went out and 249 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: 669 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 317 m²/s²
0-3 km storm-relative helicity: 506 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Apr 9, 7:15 PM EDT, 2 hours 46 minutes earlier.

Area forecast discussion, Apr 9, 7:15 PM EDT, 2 hours 46 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
715 PM EDT SAT APR 9 2011

.SYNOPSIS...
STRONG UPPER RIDGING WILL BUILD ATOP THE REGION FOR SUNDAY BUT GIVE
WAY TO AN APPROACHING COLD FRONT MONDAY NIGHT. HIGH PRESSURE THEN
RETURNS FOR TUESDAY AND WEDNESDAY.

&&

.NEAR TERM /THROUGH SUNDAY/...
UPDATED PRODUCTS TO REFLECT LATEST TORNADO WATCH 115. MADE OTHER
ADJUSTMENTS TO POPS/WX/TEMP/DP/RH AND WINDS FOR HTIS UPDATE.

PREVIOUS DISCUSSION...WATER VAPOR IMAGERY SHOWS THE POTENT UPSTREAM
MCV OVER THE OH VALLEY...WITH A STRONG MCC AHEAD OF IT. STRONG TO
SEVERE CONVECTION IS DEVELOPING TO THE SOUTH OF THIS FEATURE IN THE
VERY UNSTABLE WARM SECTOR AIRMASS. LAPS CAPE VALUES ARE ALREADY
AROUND 3000 J/KG ACROSS MUCH OF THE AREA...AND ADDITIONAL DEWPOINT
RECOVERY IS LIKELY THROUGH LATE AFTERNOON IN THE SOUTHERLY FLOW.
FORCING IS BETTER NORTH THAN SOUTH THROUGH THE PM HOURS...BUT
HEALTHY SRN TIER POPS WILL BE NEEDED AS OUTFLOWS DEVELOP. THERE IS
CONSIDERABLE CIN TO BE OVERCOME IN THE SOUNDINGS ACROSS SRN
SECTIONS...BUT INSTABILITY WILL BE QUITE STRONG WHEN REALIZED.
FREEZING LEVELS AROUND 12 K FT...STEEP LAPSE RATES ALOFT...AND
IMPROVING SHEAR PROFILES WILL MAKE FOR A ROBUST SEVERE WEATHER
THREAT THROUGH THE EARLY EVENING HOURS. STORM CORES TO 22 OR 23 KFT
SHOULD BE SUFFICIENT FOR LARGE HAIL...AND VERY LARGE HAIL WILL BE
POSSIBLE ALONG WITH SIGNIFICANT WIND DAMAGE.

WARM ADVECTION WILL INCREASE ALONG THE 850 MB BAROCLINIC ZONE
THROUGH THE EVENING HOURS...WITH WARM ADVECTION THE STRONGEST IN THE
DEEPER MOISTURE ACROSS THE NE HALF. THE BEST LATE EVENING POPS WILL
BE FEATURED THERE AS THE MCV MOVES EAST OF THE AREA. PATCHY FOG IS
EXPECTED OVERNIGHT IN AREAS RECEIVING APPRECIABLE RAINFALL...AND MIN
TEMPS SHOULD BE ON THE MILD SIDE DESPITE THE SFC FRONT SAGGING BACK
TO THE SW.

UPPER LEVEL HEIGHTS WILL BUILD SHARPLY OVER THE AREA THE REST OF
TONIGHT THROUGH SUNDAY. 850 MB TEMPS WILL WARM ANOTHER COUPLE OF
DEGREES UNDER THE RIDGE TO PRODUCE A VERY WARM SUNDAY AFTERNOON. A
PLUME OF RICH THETA E AIR IS EXPECTED TO STRETCH ACROSS THE FORECAST
AREA SUN AFTN...BUT A TRIGGER FOR CONVECTION WILL BE HARD TO FIND.

&&

.SHORT TERM /SUNDAY NIGHT THROUGH TUESDAY/...
AT 215 PM SATURDAY...LARGER SCALE LIFT AHEAD OF DEVELOPING SOUTHERN
STREAM S/WV WILL OVERSPREAD THE CWFA LATE MONDAY INTO MONDAY NIGHT.
IT IS STILL LIKELY THAT A ROUND OF FRONTAL BAND PCPN WILL AFFECT THE
AREA DURING THIS PERIOD...HOWEVER...JUST LIKE WHAT WAS FCST
YESTERDAY...TSTM MAGNITUDE IS QUESTIONABLE...WITH THE 09 UTC SREF
PROBABILITIES OF CAPE VALUES OF AT LEAST 1000 J/KG STILL VERY LOW.

PRE-FRONTAL PRESSURE GRADIENT TIGHTENS ENUF TO DEVELOP BREEZY CONDS
MONDAY AFTERNOON...AND DESPITE ENCROACHING CLOUDS...ANOTHER WARM DAY
IS ON TAP. ENCROACHING DRY SLOT TUESDAY MORNING EXPECTED TO QUICKLY
DIMINISH PCPN CHANCES DESPITE AXIS OF MID-LVL WAVE NOT TRANSLATING
DOWNSTREAM OF THE CWFA UNTIL LATER IN THE DAY. WILL SHOOT FOR
INCREASING SUNSHINE WITH MAX TEMPS CLOSER TO CLIMO...ALBEIT NEAR
5 DEG F ABOVE NORMAL.

&&

.LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/...
AT 230 PM SATURDAY...IT LOOKS LIKE THERE IS ENUF AGREEMENT BETWEEN
THE 12 UTC OP GFS AND THE LATEST HPC EXTENDED PROGS IN DEPICTING
DEEP LAYERED RIDGING ATOP THE EASTERN CONUS FOR WEDNESDAY TO PROVIDE
DRY AND SEASONABLY MILD WX. THE ONSET OF INCREASINGLY MOIST GULF TAP
AHEAD OF ENCROACHING PLAINS SYSTEM IS SLATED FOR THURSDAY...BUT
WOULD EXPECT ANOTHER ESSENTIALLY DRY AND SEASONABLY MILD DAY.

IT REMAINS TO BE SEEN HOW QUICKLY AND TO WHAT DEGREE AFOREMENTIONED
SYSTEM GETS WRAPPED UP AS IT HEADS TOWARD THE GREAT LAKES BY THE END
OF THE PERIOD. THE ATTENDANT MODERATELY FORCED COLD FRONT WILL
STEADILY ENCROACH AS WELL AND IT/S PROBABLE THAT THE MILD AND
MOISTENING AIRMASS WILL PROVIDE FUEL FOR DAILY TSTM CHANCES IN THE
WARM SECTOR.

&&

.AVIATION /23Z SATURDAY THROUGH THURSDAY/...
AT KCLT AND ELSEWHERE...CONVECTION CONTINUES TO BE MAIN CONCERN THIS
EVE WITH DAMAGING WINDS AND LARGE HAIL PSBL. COOLER...MORE STABLE
AIR WILL BEGIN TO PUSH IN FROM THE NE AS WEAK SFC BOUNDARY DIPS BACK
TO THE SW...WITH ASSOCIATED MVFR/IFR CIGS KHKY AND KCLT AND NE WINDS.
WINDS WILL BE S-SW ELSEWHERE. CONVECTION SHOULD BEGIN TO WEAKEN BY
LATE EVE. LOW CLOUDS WILL SCATTER OUT UNDER THE BUILDING RIDGE
SUNDAY WITH VFR ACROSS CWA BY AFTN.

OUTLOOK....EXPECT SCT SHWRS/TSTMS WITH A COLD FRONT MONDAY. DRIER
HIGH PRES IS EXPECTED TUE AND WED.

&&

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

&&

SYNOPSIS...CSH
NEAR TERM...HG/RB
SHORT TERM...CSH
LONG TERM...CSH
AVIATION...RB

Hazardous weather outlook, Apr 9, 6:37 PM EDT, 3 hours 24 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
637 PM EDT SAT APR 9 2011

GAZ010-017-018-026-028-029-NCZ035>037-056-057-069-072-SCZ001-004-
102245-
RABUN-HABERSHAM-STEPHENS-FRANKLIN-HART-ELBERT-ALEXANDER-IREDELL-
DAVIE-CATAWBA-ROWAN-LINCOLN-CABARRUS-OCONEE MOUNTAINS-GREATER OCONEE-
637 PM EDT SAT APR 9 2011

...SEVERE THUNDERSTORM WATCH 114 IN EFFECT UNTIL 9 PM EDT THIS
EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA...PIEDMONT
NORTH CAROLINA...WESTERN NORTH CAROLINA AND UPSTATE SOUTH CAROLINA.

.DAY ONE...TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   SEVERE THUNDERSTORM WATCH.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

NONE.

NCZ048-049-051>053-059-063>065-068-070-071-082-503>510-SCZ002-003-
005>014-019-102245-
MADISON-YANCEY-SWAIN-HAYWOOD-BUNCOMBE-NORTHERN JACKSON-
SOUTHERN JACKSON-TRANSYLVANIA-HENDERSON-CLEVELAND-GASTON-MECKLENBURG-
UNION NC-BURKE MOUNTAINS-GREATER BURKE-MCDOWELL MOUNTAINS-
EASTERN MCDOWELL-RUTHERFORD MOUNTAINS-GREATER RUTHERFORD-
POLK MOUNTAINS-EASTERN POLK-PICKENS MOUNTAINS-GREENVILLE MOUNTAINS-
GREATER PICKENS-GREATER GREENVILLE-SPARTANBURG-CHEROKEE-YORK-
ANDERSON-ABBEVILLE-LAURENS-UNION SC-CHESTER-GREENWOOD-
637 PM EDT SAT APR 9 2011

...TORNADO WATCH 115 IN EFFECT UNTIL 2 AM EDT SUNDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PIEDMONT NORTH
CAROLINA...WESTERN NORTH CAROLINA AND UPSTATE SOUTH CAROLINA.

.DAY ONE...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...SUNDAY THROUGH FRIDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

NONE.

NCZ033-050-058-062-501-502-102245-
AVERY-MITCHELL-GRAHAM-MACON-CALDWELL MOUNTAINS-GREATER CALDWELL-
637 PM EDT SAT APR 9 2011

...TORNADO WATCH 113 IN EFFECT UNTIL 9 PM EDT THIS EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN NORTH CAROLINA.

.DAY ONE...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...SUNDAY THROUGH FRIDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

NONE.

In the hours before

Local storm report, Apr 9, 8:58 PM EDT, 1 hour 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
858 PM EDT SAT APR 09 2011

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

0820 PM     HAIL             YORK                    35.00N 81.24W
04/09/2011  E1.75 INCH       YORK               SC   PUBLIC

&&

HG

Local storm report, Apr 9, 9:21 PM EDT, 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
921 PM EDT SAT APR 09 2011

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

0917 PM     HAIL             4 NNW CHESTER           34.76N 81.23W
04/09/2011  E1.00 INCH       CHESTER            SC   AMATEUR RADIO

&&

Local storm report, Apr 9, 9:28 PM EDT, 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
928 PM EDT SAT APR 09 2011

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

0925 PM     HAIL             3 SW ELLENBORO          35.29N 81.79W
04/09/2011  E1.25 INCH       RUTHERFORD         NC   AMATEUR RADIO

&&
MIDDLE STREET IN CAROLEEN

Local storm report, Apr 9, 9:41 PM EDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
941 PM EDT SAT APR 09 2011

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

0923 PM     HAIL             2 ENE CHESTER           34.72N 81.18W
04/09/2011  E1.00 INCH       CHESTER            SC   FIRE DEPT/RESCUE

&&

Special weather statement, Apr 9, 9:48 PM EDT, 13 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
948 PM EDT SAT APR 9 2011

NCZ048-053-100230-
BUNCOMBE-MADISON-
948 PM EDT SAT APR 9 2011

...A STRONG THUNDERSTORM WILL AFFECT EASTERN MADISON AND NORTHEASTERN
BUNCOMBE COUNTIES THROUGH 1030 PM EDT...

AT 937 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF STRONG THUNDERSTORMS FROM 3 MILES NORTHEAST OF MARSHALL TO 5
MILES SOUTH OF BARNARDSVILLE. THE STORMS WERE MOVING SOUTHEAST AT 40
MPH.

THE STORMS WILL AFFECT MUCH OF SOUTHEAST MADISON AND NORTHEAST
BUNCOMBE COUNTIES OVER THE NEXT HOUR.

PEA SIZE HAIL...AND WIND GUSTS OF 30 TO 40 MPH ARE EXPECTED WITH
THESE
STORMS.

HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS. WATER
LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE SEEK
HIGHER GROUND IF THREATENED BY FLOOD WATERS.

LAT...LON 3584 8242 3582 8241 3582 8239 3579 8234
      3575 8234 3571 8228 3569 8230 3568 8229
      3558 8238 3583 8277 3596 8261

MCAVOY

Special weather statement, Apr 9, 10:01 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1001 PM EDT SAT APR 9 2011

NCZ048-100245-
MADISON-
1001 PM EDT SAT APR 9 2011

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL MADISON COUNTY THROUGH
1045 PM EDT...

AT 955 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 4 MILES NORTH OF WALNUT...OR 8 MILES NORTHWEST OF
MARSHALL...MOVING SOUTHEAST AT 30 MPH.

THIS STORM WILL BE NEAR...
  MARSHALL...
  MARS HILL...

DIME SIZE HAIL...AND WIND GUSTS OF 30 TO 40 MPH ARE EXPECTED WITH
THIS STORM.

LAT...LON 3581 8250 3573 8267 3589 8282 3595 8274

MCAVOY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 8:06 PM EDT	Severe Thunderstorm Warning	GSP	Buncombe, Madison	54 min
Apr 9, 8:08 PM EDT	Severe Thunderstorm Warning	GSP	Cleveland, Rutherford	30 min
Apr 9, 8:11 PM EDT	Severe Thunderstorm Warning	GSP	Henderson, Polk	39 min
Apr 9, 8:29 PM EDT	Severe Thunderstorm Warning	GSP	Cleveland	34 min
Apr 9, 9:20 PM EDT	Severe Thunderstorm Warning	GSP	Cleveland, Rutherford	17 min
Apr 9, 9:48 PM EDT	Special Weather Statement	GSP	Madison	42 min
Apr 9, 10:19 PM EDT	Special Weather Statement	GSP	Henderson	26 min
Apr 9, 11:49 PM EDT	Special Weather Statement	GSP	Union	41 min
Apr 10, 3:29 AM EDT	Dense Fog Advisory	GSP	Alexander, Buncombe, Burke, Caldwell, Catawba, Henderson and 3 more	7 hr
Apr 9, 8:32 PM EDT	Severe Thunderstorm Warning	GSP	Chester, York	43 min
Apr 9, 8:56 PM EDT	Severe Thunderstorm Warning	GSP	Chester, Union, York	64 min
Apr 9, 9:14 PM EDT	Severe Thunderstorm Warning	GSP	Cherokee, York	43 min
Apr 9, 9:23 PM EDT	Severe Thunderstorm Warning	GSP	Chester	37 min
Apr 9, 10:04 PM EDT	Severe Thunderstorm Warning	GSP	Chester, York	44 min

Nearby

Special Weather Statements in North Carolina, 2011 Every special weather statement in 2011

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.