Alert archive / North Carolina / Flash Flood Warnings in 2011
Flash Flood Warning 31, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this flash flood warning at Dec 22, 2011, 9:57 PM EST for Henderson County, North Carolina. It was in force for 6 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
- Dec 22, 2011, 9:57 PM EST (02:57 UTC)
- Expired
- Dec 23, 2011, 4:00 AM EST
- In force
- 6 hr
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Storm-based polygon
- Flood severity
- None
County Henderson County, NC
The radar
The Greer radar (KGSP), 51 km from the middle of the area, began a volume at 02:58 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 |
|---|---|---|---|
| Dec 22, 11:00 PM EST | FLASH FLOOD | 1 Ese Hendersonville, NC | JACKSON PARK CLOSED DUE TO FLOODING OF BAT FORK CREEK. |
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 63 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 00:00Z, 3.0 hours before the alert went out and 245 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.
- Mixed-layer CAPE
- 27 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 457 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 244 m²/s²
- 0-3 km storm-relative helicity
- 278 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
914 WGUS52 KGSP 230257 FFWGSP NCC089-230900- /O.NEW.KGSP.FF.W.0031.111223T0257Z-111223T0900Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 957 PM EST THU DEC 22 2011 THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL HENDERSON COUNTY IN WESTERN NORTH CAROLINA... * UNTIL 400 AM EST FRIDAY * AT 946 PM EST...HEAVY RAIN FROM EARLIER THUNDERSTORMS HAVE PRODUCED LARGE AMOUNTS OF RUN OFF INTO BAT FORK AND MUDDY CREEKS. RECENT STREAM GAUGES HAVE INDICATED VERY QUICK RISES IN THE PAST HOUR AND CONTINUED STEADY RUNOFF WILL ENABLE BAT CREEK AND POSSIBLY MUD CREEK TO REACH AND EXCEED FLOOD STAGE...MOST LIKELY WITHIN THE NEXT HOUR OR TWO. CURRENT GAUGE READINGS ARE JUST OVER 6 FEET AT BOTH STREAM GAUGE SITES AND FLOOD STAGE AT EACH SITE IS 7.5 FEET. * AT 6.5 FEET...WATER LEVELS AT BAT CREEK WILL APPROACH AN EARTHEN RIDGE PROTECTING AIRPORT ROAD. AT 6.8 FEET...WATER WILL OVERFLOW THE RIDGE AND BEGIN TO FLOOD AIRPORT ROAD WITH ABOUT 1 FOOT OF WATER. * AT 6.0 FEET...WATER FROM MUD CREEK WILL APPROACH KING STREET AND THE SOUTH-CENTER INTERSECTION AREA. THE NATIONAL WEATHER SERVICE WILL CONTINUE TO MONITOR THIS DEVELOPING SITUATION. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. 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 3535 8237 3527 8237 3524 8253 3533 8254 $$ KRENTZ
2 follow-up statements
155 WGUS72 KGSP 230540 FFSGSP FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 1240 AM EST FRI DEC 23 2011 NCC089-230900- /O.CON.KGSP.FF.W.0031.000000T0000Z-111223T0900Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ HENDERSON NC- 1240 AM EST FRI DEC 23 2011 ...FLASH FLOOD WARNING REMAINS IN EFFECT FOR CENTRAL HENDERSON COUNTY UNTIL 400 AM EST... AT 1236 AM EST...AUTOMATED STREAM GAUGES INDICATED THAT FLASH FLOODING WAS OCCURRING IN THE HENDERSONVILLE AREA. BAT FORK CREEK WAS AT 7.38 FEET. AT THIS LEVEL...FLOODING OF AIRPORT ROAD WILL OCCUR AND JACKSON PARK WILL FLOOD AS WELL. A COLD FRONT HAS MOVED THROUGH THE REGION...BRINGING HEAVY RAIN TO AN END. HOWEVER...HIGH WATER WILL CONTINUE FOR A FEW MORE HOURS...PARTICULARLY ON THE SOUTH AND EAST SIDE OF HENDERSONVILLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. && LAT...LON 3535 8237 3527 8237 3524 8253 3533 8254 $$ MCAVOY
087 WGUS72 KGSP 230902 FFSGSP FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 402 AM EST FRI DEC 23 2011 NCC089-230916- /O.EXP.KGSP.FF.W.0031.000000T0000Z-111223T0900Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ HENDERSON NC- 402 AM EST FRI DEC 23 2011 ...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR CENTRAL HENDERSON COUNTY HAS BEEN ALLOWED TO EXPIRE... 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 3535 8237 3527 8237 3524 8253 3533 8254 $$ MCAVOY
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 Dec 22, 9:50 PM EST, 7 minutes earlier.
Area forecast discussion, Dec 22, 9:50 PM EST, 7 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 950 PM EST THU DEC 22 2011 .SYNOPSIS... A COLD FRONT WILL SWEEP ACROSS THE REGION TONIGHT FOLLOWED BY DRY AIR OVERSPREADING THE AREA FRIDAY INTO SATURDAY. LOW PRESSURE WILL SLIDE BY OFF TO OUR SOUTH CHRISTMAS DAY INTO MONDAY. && .NEAR TERM /THROUGH FRIDAY/... AT 905 PM EST...AN UPPER RIDGE WAS LOCATED OVER THE WESTERN ATLANTIC...WHILE AN UPPER TROUGH WAS OVER THE SOUTHERN ROCKIES. A COLD FRONT WAS ANALYZED OVER THEN NC MOUNTAINS THIS EVENING. SHOWERS AHEAD OF THIS FRONT WERE MOVING QUICKLY EAST INTO THE FOOTHILLS AND PIEDMONT...AND THE REMAINING UPPER SAVANNAH RIVER COUNTIES WILL BE CLEARED FORM THE TORNADO WATCH. CATEGORICAL POPS WILL BE CARRIED AHEAD OF THE FRONT INTO THE LATE EVENING...AFTER WHICH VEERING WINDS WILL INTRODUCE A DOWNSLOPE FLOW COMPONENT... ENDING PRECIPITATION. WINDS ARE EXPECTED TO BE GREAT ENOUGH TO PREVENT FOG FROM FORMING OVER MOST OF THE AREA...BUT THE UPPER SAVANNAH RIVER VALLEY MAY HAVE ENOUGH OF A LULL IN WINDS FOR SOME PATCHY DENSE FOG. TEMPERATURES WILL BE WELL ABOVE NORMAL...AS COLD ADVECTION WILL BE SLOW TO SET UP BEHIND THE FRONT. DRY AIR WILL INCREASE IN THE WAKE OF THE COLD FRONT...YIELDING CLEARING SKY CONDITIONS FRIDAY. A FEW NW FLOW SHRA MAY DEVELOP OVER THE TN BORDER DURING THE MORNING...BUT FADE IN THE AFTERNOON. EXPECT DRY WX...NW WINDS...AND HIGHS IN THE MID 50S WITHIN THE MTN VALLEYS TO MID TO UPPER 60S EAST OF I-85. && .SHORT TERM /FRIDAY NIGHT THROUGH SUNDAY NIGHT/... AS OF 230 PM THU...A CONFLUENT UPPER FLOW PATTERN SHOULD EXIST ACROSS THE E THROUGH THE WEEKEND. NRN STREAM ENERGY WILL MOVE EWD ACROSS THE GREAT LAKES TO NEW ENGLAND...WHILE A SRN STREAM SYSTEM DEVELOPS OVER THE SRN PLAINS AND W TX. AN UPPER JETLET SE OF THESE FEATURES AND NW OF THE FORECAST AREA WILL LIKELY KEEP SOME HIGH LEVEL CLOUDINESS IN THE PICTURE THROUGH THE PERIOD. AT THE SFC...WEAK HIGH PRES WILL DEVELOP UNDER THE CONFLUENT FLOW ALOFT AND PERSIST THROUGH SAT. SHALLOW MOISTURE AHEAD OF THE SRN STREAM SYSTEM MAY RETURN TO THE AREA LATE SAT NIGHT INTO SUNDAY. THE NAM SHOWS VERY LIMITED FORCING WITH LITTLE TO NO WARM ADVECTION THROUGH THE DAY ON SUNDAY...AND THE BEST MOISTURE PASSING JUST S OF THE AREA. THE ECMWF HAS BEEN MORE AGGRESSIVE WITH THE SUNDAY MOISTURE...BUT THE 12Z RUN DID BACK OFF A BIT. THE GFS APPEARS TO BE A MORE MIDDLE OF THE ROAD SOLUTION. THE CONSENSUS WILL FEATURE THE BEST SUNDAY PRECIP CHANCES IN THE SE HALF OF THE AREA. EXPECT MAX TEMPS A COUPLE OF CATEGORIES ABOVE NORMAL SAT...AND SLIGHTLY ABOVE NORMAL SUNDAY. && .LONG TERM /MONDAY THROUGH THURSDAY/... AS OF 230 PM THU...DRY RIDGING WILL DEVELOP OVER THE AREA ON MON. IN A CONTINUED PROGRESSIVE FLOW PATTERN...ANOTHER SRN STREAM SYSTEM OVER W TX MON MAY LIFT EWD TO THE BASE OF THE APPALACHIANS LATE TUE. AN ASSOCIATED SFC REFLECTION SHOULD DEVELOP OVER THE ERN GULF. THE CONSENSUS SOLUTION IS THAT THE BEST PRECIPITATION CHANCES WILL STRIKE A GLANCING BLOW ACROSS THE SE PART OF THE AREA SUN AFTN. THE 12Z ECM HAS COME IN FEATURING A DIFFERENT SOLUTION...WITH A STRONGER E COAST RIDGE PUSHING MOISTURE BACK INTO THE SRN APPALACHIANS TUE. WILL NOT TREND THE FORECAST TOWARD THIS SOLUTION AT PRESENT. ON WED...A TROUGH AXIS IS EXPECTED TO CARVE OUT OVER THE MID SECTION OF THE COUNTRY AND THEN SWING EWD ACROSS THE REGION ON THURSDAY. THIS SYSTEM WILL TRANSLATE EWD SO QUICKLY THAT LITTLE TO NO GULF MOISTURE TAP APPEARS POSSIBLE...AND LITTLE DEEP MOISTURE WILL ACCOMPANY THE WAVE. WILL THUS KEEP THE FORECAST ON THE LOW SIDE OF GUIDANCE POPS FOR THU. && .AVIATION /03Z FRIDAY THROUGH TUESDAY/... AT KCLT...MVFR WILL CONTINUE FOR SEVERAL HOURS BEHIND DEPARTING PRECIPITATION...UNTIL VEERING WINDS INTRODUCE ENOUGH OF A DOWNSLOPE COMPONENT TO RETURN VFR BEFORE DAWN. ELSEWHERE...MVFR WILL PERSIST BEHIND DEPARTING SHOWERS UNTIL WINDS VEER AND BRING DOWNSLOPE FLOW AND VFR TOWARD DAYBREAK. IT NOW APPEARS THERE WILL BE ENOUGH WINDS TO PREVENT MORNING FOG FROM RESTRICTING VSBY...EVEN AT KAND. OUTLOOK...VFR UNTIL MOISTURE RETURNS AHEAD OF A GULF COAST SYSTEM SAT NIGHT INTO SUN. RESTRICTIONS SUNDAY WOULD APPEAR TO BE MINIMAL THIS FAR NORTH OF THE SURFACE SYSTEM. VFR AGAIN ON MONDAY. 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...CSH NEAR TERM...JAT/NED SHORT TERM...HG LONG TERM...HG AVIATION...JAT
Hazardous weather outlook, Dec 22, 9:19 PM EST, 38 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 919 PM EST THU DEC 22 2011 GAZ010-017-018-026-028-NCZ033-048>053-058-059-062>065-501-503-505- 507-509-SCZ001>006-010-240230- RABUN-HABERSHAM-STEPHENS-FRANKLIN-HART-AVERY-MADISON-YANCEY-MITCHELL- SWAIN-HAYWOOD-BUNCOMBE-GRAHAM-NORTHERN JACKSON-MACON- SOUTHERN JACKSON-TRANSYLVANIA-HENDERSON-CALDWELL MOUNTAINS- BURKE MOUNTAINS-MCDOWELL MOUNTAINS-RUTHERFORD MOUNTAINS- POLK MOUNTAINS-OCONEE MOUNTAINS-PICKENS MOUNTAINS- GREENVILLE MOUNTAINS-GREATER OCONEE-GREATER PICKENS- GREATER GREENVILLE-ANDERSON- 919 PM EST THU DEC 22 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA...WESTERN NORTH CAROLINA AND UPSTATE SOUTH CAROLINA. .DAY ONE...TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... NONE. GAZ029-NCZ035>037-056-057-068>072-082-502-504-506-508-510-SCZ007>009- 011>014-019-240230- ELBERT-ALEXANDER-IREDELL-DAVIE-CATAWBA-ROWAN-CLEVELAND-LINCOLN- GASTON-MECKLENBURG-CABARRUS-UNION NC-GREATER CALDWELL-GREATER BURKE- EASTERN MCDOWELL-GREATER RUTHERFORD-EASTERN POLK-SPARTANBURG- CHEROKEE-YORK-ABBEVILLE-LAURENS-UNION SC-CHESTER-GREENWOOD- 919 PM EST THU DEC 22 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA...PIEDMONT NORTH CAROLINA...WESTERN NORTH CAROLINA AND UPSTATE SOUTH CAROLINA. .DAY ONE...TONIGHT. ISOLATED TO SCATTERED THUNDERSTORMS ARE POSSIBLE LATE THIS EVENING IN THE FOOTHILLS AND PIEDMONT. CLOUDS TO GROUND LIGHTNING WILL BE THE MAIN HAZARD WITH THESE STORMS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... NONE.
The office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 22, 10:07 PM EST | River Flood Advisory | GSP | Henderson, Transylvania | 12 hr |
| Dec 22, 10:45 PM EST | Areal Flood Advisory | GSP | Transylvania | 6 hr |
| Dec 23, 11:21 AM EST | River Flood Advisory | GSP | Henderson, Transylvania | 12 hr |
Nearby
Flash Flood Warnings in North Carolina, 2011Every 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.