Alert archive / North Carolina / Flash Flood Warnings in 2011

Flash Flood Warning 20, NWS Greenville-Spartanburg, SC

August 12, 2011Union County, North Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at Aug 12, 2011, 3:21 PM EDT for Union County, North Carolina. It was in force for 3 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 12, 2011, 3:21 PM EDT (19:21 UTC)
Expired: Aug 12, 2011, 6:21 PM EDT
In force: 3 hr
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Flood severity: None

County Union County, NC

The radar

The Columbia radar (KCAE), 145 km from the middle of the area, began a volume at 19:23 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.

What was reported inside it

Time	Report	Where	Remark
Aug 12, 4:10 PM EDT	FLASH FLOOD	1 N Wingate, NC	RELAYED DOT REPORT OF FLOODING OF MEADOW BRANCH ACROSS MCENTYRE RD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this flash flood warning; the first came 49 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 7.4 hours before the alert went out and 117 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: 185 J/kg
Mixed-layer CIN: -156 J/kg
Mixed-layer LCL: 1130 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 104 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

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

711 
WGUS52 KGSP 121921
FFWGSP
NCC179-130130-
/O.NEW.KGSP.FF.W.0020.110812T1921Z-110813T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
321 PM EDT FRI AUG 12 2011

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN UNION COUNTY IN THE PIEDMONT OF NORTH CAROLINA...

* UNTIL 930 PM EDT

* AT 317 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE      
  WARNED AREA. OVER THREE INCHES OF RAINFALL ARE ESTIMATED TO HAVE   
  FALLEN OVER THIS AREA IN THE LAST HOUR.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...     
  SALEM CREEK...AND BECKY BRANCH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

TO REPORT HIGH WATER...FLOODING...MUDSLIDES...LANDSLIDES OR OTHER
SEVERE WEATHER THROUGH OUR AUTOMATED REPORTING SYSTEM...CALL OUR TOLL
FREE NUMBER... 1 8 7 7...6 3 3...6 7 7 2.

&&

LAT...LON 3492 8031 3493 8056 3519 8057 3520 8053
      3519 8051 3517 8044 3518 8037 3517 8035
      3520 8028 3518 8027

$$

07

3 follow-up statements

667 
WGUS72 KGSP 122024
FFSGSP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
424 PM EDT FRI AUG 12 2011

NCC179-130130-
/O.CON.KGSP.FF.W.0020.000000T0000Z-110813T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
UNION NC-
424 PM EDT FRI AUG 12 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHEASTERN UNION
COUNTY IN THE PIEDMONT OF NORTH CAROLINA UNTIL 930 PM EDT...

AT 420 PM EDT...EMERGENCY MANAGEMENT REPORTED THAT FLASH FLOODING WAS
OCCURRING ONE MILE NORTH OF WINGATE...WHERE MEADOW BRANCH HAD RISEN 
ACROSS MCINTYRE ROAD.

SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING ARE TO THE EAST 
OF A LINE FROM FAIRVIEW...TO UNIONVILLE...TO MONROE...INCLUDING RAYS 
FORK...CROOKED CREEK...AND RICHARDSON CREEK..

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

&&

LAT...LON 3492 8031 3493 8056 3519 8057 3520 8053
      3519 8051 3517 8044 3518 8037 3517 8035
      3520 8028 3518 8027

$$

07

778 
WGUS72 KGSP 122112
FFSGSP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
512 PM EDT FRI AUG 12 2011

NCC179-130130-
/O.CON.KGSP.FF.W.0020.000000T0000Z-110813T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
UNION NC-
512 PM EDT FRI AUG 12 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHEASTERN UNION
COUNTY IN THE PIEDMONT OF NORTH CAROLINA UNTIL 930 PM EDT...

AT 503 PM EDT...ALTHOUGH HEAVY RAINFALL HAS MOVED OUT OF THE AREA... 
RUNOFF FROM EARLIER RAINFALL WILL CONTINUE...AND WATER LEVELS MAY 
NOT RECEDE FOR SOME TIME. AREAS MOST PRONE TO FLOODING WILL BE JUST 
EAST OF A LINE FROM FAIRVIEW...TO UNIONVILLE...TO MONROE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

&&

LAT...LON 3492 8031 3493 8056 3519 8057 3520 8053
      3519 8051 3517 8044 3518 8037 3517 8035
      3520 8028 3518 8027

$$

07

167 
WGUS72 KGSP 122221
FFSGSP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
621 PM EDT FRI AUG 12 2011

NCC179-122236-
/O.CAN.KGSP.FF.W.0020.000000T0000Z-110813T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
UNION NC-
621 PM EDT FRI AUG 12 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHEASTERN UNION
COUNTY IN THE PIEDMONT OF NORTH CAROLINA IS CANCELLED...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 3492 8031 3493 8056 3519 8057 3520 8053
      3519 8051 3517 8044 3518 8037 3517 8035
      3520 8028 3518 8027

$$

ARK

What forecasters said that day

The local office's own words before this flash 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 flash flood warning went out at Aug 12, 2:18 PM EDT, 1 hour 3 minutes earlier.

Area forecast discussion, Aug 12, 2:18 PM EDT, 1 hour 3 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
218 PM EDT FRI AUG 12 2011

.SYNOPSIS...
HIGH PRESSURE WILL MOVE OFF THE EAST COAST BY SATURDAY. A COLD FRONT
WILL THEN APPROACH THE AREA FROM THE NORTHWEST AND MOVE ACROSS THE
CAROLINAS EARLY SUNDAY. HIGH PRESSURE WILL BUILD IN FROM THE NORTH
EARLY NEXT WEEK.

&&

.NEAR TERM /THROUGH SATURDAY/...
ALTHOUGH SHOWERS WERE QUICK TO DEVELOP THIS MORNING...OTHER
CONVECTION HAS REMAINED ISOLATED EXCEPT FOR THE ERN UPSTATE AND THE
NRN BLUE RIDGE. STILL...GIVEN THE MODERATE INSTABILITY AND WEAK
SHORT WAVE MOVING THRU EXPECT MAINLY SCT COVERAGE AS STORMS FORM
ALONG THE BLUE RIDGE THEN MOVE SOUTH AND EAST ACROSS THE FOOTHILLS
AND PIEDMONT. EFFECTIVE SHEAR VALUES ARE AROUND 30 KTS WITH DCAPE
AROUND 1000 J/KG. THEREFORE...A THREAT OF ISOLATED SEVERE DOWNBURSTS
REMAINS UNTIL THIS EVENING WHEN CONVECTION DIMINISHES WITH LOSS OF
HEATING. THE LOW LEVEL E TO SE FLOW COULD HELP PRODUCE SOME ISOLATED
AREAS OF EXCESSIVE RAINFALL AS WELL.

LOW LEVEL MOISTURE AND E TO SE FLOW WILL CONTINUE OVERNIGHT WITH
COULD KEEP ISOLATED SHOWERS GOING. AT THE LEAST...A DECK OF LOW
CLOUDS SHOULD FORM AND MOVE INTO THE AREA IN THE FLOW. AREAS OF FOG
COULD DEVELOP AS WELL. LOWS SHOULD BE NEAR NORMAL.

SATURDAY...EXPECT SHOWERS TO START EARLY AGAIN AS THE CONTINUED SELY
FLOW ACTS ON LINGERING LOW LEVEL MOISTURE. OVERALL CONVECTION COULD
BE MORE WIDESPREAD AS SOME ADDITIONAL UPPER LEVEL ENERGY MOVES IN.
HAVE KEPT POP LIMITED TO SOLID CHC FOR NOW. HIGHS SHOULD BE JUST ON
THE LOW SIDE OF NORMAL.

&&

.SHORT TERM /SATURDAY NIGHT THROUGH MONDAY NIGHT/...
AT 2 PM EDT FRIDAY...AN UPPER TROUGH WILL AMPLIFY ALONG THE EASTERN
SEABOARD FROM SATURDAY NIGHT THROUGH SUNDAY NIGHT...THEN WILL
DEAMPLIFY SLIGHTLY ON MONDAY. A COLD FRONT WILL CROSS OUR AREA FROM
THE NORTHWEST LATE SATURDAY NIGHT AND EARLY SUNDAY...ACCOMPANIED BY
SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS. MODERATE
INSTABILITY AND SHEAR WILL ACCOMPANY THE FRONTAL PASSAGE. THE SLOW
MOVING NATURE OF THE BOUNDARY...COMBINED WITH A WEAK PRECEDING
SOUTHERLY UPSLOPE FLOW...WILL FAVOR RAINFALL AMOUNTS IN EXCESS OF
ONE INCH...AND PERHAPS TWO INCHES IN THE MOUNTAINS. AS WINDS VEER TO
THE NORTHWEST...UPSLOPE FLOW SHOWERS WILL SET UP IN THE NC MOUNTAINS
BORDERING TN LATE SUNDAY INTO SUNDAY NIGHT...ENDING MONDAY AS DRY
HIGH PRESSURE BUILDS EAST INTO THE MOUNTAINS. TEMPERATURES WILL RUN
NEAR NORMAL SATURDAY NIGHT...THEN BELOW NORMAL FORM SUNDAY THROUGH
MONDAY.

&&

.LONG TERM /TUESDAY THROUGH FRIDAY/...
AT 2 PM EDT FRIDAY...AN UPPER TROUGH WILL BE ALONG THE EAST COAST ON
MONDAY NIGHT AND TUESDAY. HEIGHTS RISE TEMPORARILY ON WEDNESDAY
BETWEEN SHORTWAVES MOVING THROUGH THE MEAN TROUGH...THEN FALL LATE
IN THE WEEK AS A CLOSED UPPER LOW MOVES ACROSS SOUTHERN
CANADA...CAUSING THE TROUGH AXIS TO RETROGRADE INTO THE
APPALACHIANS. A SLOW MOVING COLD FRONT WILL BE NEAR THE COAST ON
TUESDAY...WHILE RELATIVELY COOL AND DRY HIGH PRESSURE BUILDS EAST
ACROSS THE MOUNTAINS. THIS HIGH CROSSES THE MOUNTAINS ON
WEDNESDAY...THEN REMAINS ALONG THE EAST COAST THROUGH FRIDAY.
PRECIPITATION WILL BE QUITE LIMITED IN THIS HIGH PRESSURE...AND
MAINLY CONFINED TO THE BLUE RIDGE ESCARPMENT DIFFERENTIAL HEATING
AND LIGHT UPSLOPE FLOW COME INTO PLAY. TEMPERATURES WILL BE CLOSE TO
LATE SUMMER OR EARLY AUTUMN NORMAL.

&&

.AVIATION /18Z FRIDAY THROUGH WEDNESDAY/...
AT KCLT AND ELSEWHERE...LARGE AREA OF CONVECTION SHOULD REMAIN SOUTH
OF KCLT EARLY THIS AFTERNOON...BUT ADDITIONAL CONVECTION EXPECTED
LATER. NO CELLS ARE CURRENTLY LOOMING OVER A TAF SITE...SO JUST KEPT
CB MENTION FOR NOW. EXPECT A GENERAL E TO SE WIND THIS AFTERNOON
THEN LIGHT AND VARIABLE TO CALM OVERNIGHT. CONVECTION SHOULD
DIMINISH WITH LOSS OF HEATING BUT WEAK UPSLOPE FLOW AND LOW LEVEL
MOISTURE COULD KEEP LINGERING SHOWERS THRU THE NITE. MVFR FOG LIKELY
MOST LOCATIONS TOWARD MORNING...WITH LIFR AT KAVL. FOG AND CLOUDS
WILL LIFT BY MID MORNING...BUT SHOWERS WILL BE ON THE INCREASE AGAIN
EARLY WITH THE CONTINUED MOISTURE AND FLOW. DID NOT MENTION ANY CB
FOR SAT...BUT IT WILL BE NEEDED AT SOME POINT. LIGHT SELY WINDS
EXPECTED BY MID MORNING.

OUTLOOK...CHANCE TSTMS INCREASES SAT NITE-SUN AS A COLD FRONT MOVES
THRU. EXPECT DRIER WEATHER MON-WED.

AN EXPERIMENTAL AVIATION FORECAST CONSISTENCY TABLE SHOWING THE
PERCENTAGE OF GUIDANCE MEMBERS AGREEING WITH THE SCHEDULED ISSUANCE
CATEGORY IS AVAILABLE AT FOLLOWING LINK (USE LOWER CASE)...

WWW.WEATHER.GOV/GSP/AVIATION/TABLES.HTM

&&

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

&&

SYNOPSIS...TJB
NEAR TERM...RWH
SHORT TERM...JAT
LONG TERM...JAT
AVIATION...RWH

Hazardous weather outlook, Aug 12, 11:06 AM EDT, 4 hours 15 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1106 AM EDT FRI AUG 12 2011

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-131515-
RABUN-HABERSHAM-STEPHENS-FRANKLIN-HART-ELBERT-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-UNION NC-
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-YORK-
ANDERSON-ABBEVILLE-LAURENS-UNION SC-CHESTER-GREENWOOD-
1106 AM EDT FRI AUG 12 2011

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SCATTERED THUNDERSTORMS WILL DEVELOP ACROSS THE AREA THIS
AFTERNOON AND CONTINUE INTO THE EVENING. SOME OF THESE STORMS
COULD BECOME SEVERE...CAPABLE OF PRODUCING LOCALLY DAMAGING WIND
GUSTS. ISOLATED AREAS OF HEAVY RAINFALL COULD ALSO DEVELOP...
ESPECIALLY IN LOCATIONS WHERE MULTIPLE STORMS MOVE THROUGH.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

A COLD FRONT WILL MOVE ACROSS THE AREA LATER THIS WEEKEND.
SCATTERED TO NUMEROUS THUNDERSTORMS IN ADVANCE OF THIS FRONT ARE
EXPECTED SATURDAY AFTERNOON THROUGH SUNDAY. SOME OF THESE
THUNDERSTORMS COULD BECOME SEVERE AND PRODUCE DAMAGING
WINDS...LARGE HAIL...AND HEAVY RAINFALL.

.SPOTTER INFORMATION STATEMENT...

NONE.

In the hours before

Local storm report, Aug 12, 9:28 AM EDT, 5 hours 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
928 AM EDT FRI AUG 12 2011

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

0523 PM     TSTM WND DMG     6 S UNION               34.64N 81.62W
08/11/2011                   UNION              SC   DEPT OF HIGHWAYS

            TREE DOWN ON LEE CEMETARY RD. TIME ESTIMATED FROM RADAR.

&&

ZHARGROV

Special weather statement, Aug 12, 11:17 AM EDT, 4 hours 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1117 AM EDT FRI AUG 12 2011

SCZ012-013-121600-
LAURENS-UNION-
1117 AM EDT FRI AUG 12 2011

...A STRONG THUNDERSTORM WILL AFFECT EASTERN LAURENS AND WESTERN
UNION COUNTIES THROUGH NOON EDT...

AT 1115 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 4 MILES SOUTHEAST OF LAURENS...MOVING EAST AT 10
MPH.

* OTHER LOCATIONS AFFECTED INCLUDE BUT ARE NOT LIMITED TO SEDALIA...
  LAURENS...JOANNA AND CLINTON.

VERY HEAVY RAINFALL...SMALL HAIL...AND WIND GUSTS OF 40 TO 50 MPH
ARE EXPECTED WITH THIS STORM.

LAT...LON 3437 8205 3455 8209 3460 8189 3459 8187
      3458 8187 3461 8185 3464 8173 3446 8169
      3444 8173 3439 8176

07

Local storm report, Aug 12, 12:38 PM EDT, 2 hours 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1238 PM EDT FRI AUG 12 2011

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

0249 PM     TSTM WND DMG     2 ENE CASAR             35.52N 81.58W
08/11/2011                   CLEVELAND          NC   PUBLIC

            TWO TREES DOWN ON HWY 10 IN BETWEEN CASAR AND TOLUCA.

&&

ZHARGROV

Special weather statement, Aug 12, 12:51 PM EDT, 2 hours 30 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1251 PM EDT FRI AUG 12 2011

SCZ013-121730-
UNION-
1251 PM EDT FRI AUG 12 2011

...A STRONG THUNDERSTORM WILL AFFECT NORTHERN UNION COUNTY THROUGH
130 PM EDT...

AT 1245 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 4 MILES WEST OF BUFFALO...OR 8 MILES WEST OF
UNION...MOVING EAST AT 10 MPH.

THIS STORM WILL BE NEAR...
  BUFFALO...
  JONESVILLE...
  UNION...

VERY HEAVY RAINFALL...SMALL HAIL...AND WIND GUSTS OF 40 TO 50 MPH
ARE EXPECTED WITH THIS STORM.

LAT...LON 3462 8184 3465 8184 3468 8182 3482 8179
      3488 8151 3487 8150 3475 8147 3473 8149
      3472 8147 3464 8145

07

Special weather statement, Aug 12, 1:10 PM EDT, 2 hours 11 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
110 PM EDT FRI AUG 12 2011

SCZ014-121800-
CHESTER-
110 PM EDT FRI AUG 12 2011

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN CHESTER COUNTY
THROUGH 200 PM EDT...

AT 106 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 7 MILES SOUTH OF RICHBURG...OR 12 MILES SOUTHEAST
OF CHESTER...MOVING EAST AT 5 MPH.

THIS STORM WILL BE NEAR...
  GREAT FALLS...

VERY HEAVY RAINFALL...SMALL HAIL...AND WIND GUSTS OF 40 TO 50 MPH
ARE EXPECTED WITH THIS STORM.

LAT...LON 3468 8087 3465 8089 3455 8087 3454 8088
      3454 8097 3455 8106 3455 8115 3471 8113
      3471 8086 3469 8085

07

Special weather statement, Aug 12, 3:11 PM EDT, 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
311 PM EDT FRI AUG 12 2011

SCZ009-122000-
YORK-
311 PM EDT FRI AUG 12 2011

...A STRONG THUNDERSTORM WILL AFFECT YORK COUNTY THROUGH 400 PM
EDT...

AT 305 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 5 MILES SOUTHEAST OF YORK...MOVING NORTHEAST AT
15 MPH.

THIS STORM WILL BE NEAR...
  ROCK HILL...
  CATAWBA...
  TEGA CAY...
  FORT MILL...

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

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 3482 8089 3482 8104 3497 8142 3516 8112
      3515 8109 3512 8104 3509 8106 3505 8104
      3509 8096 3506 8089 3501 8090 3495 8086
      3484 8086

ARK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 3:08 PM EDT	Areal Flood Advisory	GSP	Union	3 hr
Aug 12, 4:22 PM EDT	Special Weather Statement	GSP	McDowell	38 min
Aug 12, 4:58 PM EDT	Special Weather Statement	GSP	Rutherford	47 min
Aug 12, 5:29 PM EDT	Special Weather Statement	GSP	Buncombe	46 min
Aug 12, 6:32 PM EDT	Special Weather Statement	GSP	Henderson	43 min
Aug 12, 6:48 PM EDT	Special Weather Statement	GSP	Polk	42 min

Nearby

Flash Flood Warnings in North Carolina, 2011 Every flash flood warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.