Alert archive / North Carolina / Areal Flood Warnings in 2009

Areal Flood Warning 21, NWS Greenville-Spartanburg, SC

September 21, 2009Jackson County, Macon County, North Carolina

NWS Greenville-Spartanburg, SC issued this areal flood warning at Sep 21, 2009, 5:25 PM EDT for Jackson County, Macon County, North Carolina. It was in force for 7 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 21, 2009, 5:25 PM EDT (21:25 UTC)
Expired: Sep 22, 2009, 12:15 AM EDT
In force: 7 hr
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Flood severity: None

Counties Jackson County, NC, Macon County, NC

The radar

The Greer radar (KGSP), 104 km from the middle of the area, began a volume at 21:27 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.4 hours before the alert went out and 234 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: 1565 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 454 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 4.8

Open this sounding in Storm Lab

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 Sep 21, 2:37 PM EDT, 2 hours 48 minutes earlier.

Area forecast discussion, Sep 21, 2:37 PM EDT, 2 hours 48 minutes before

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Hazardous weather outlook, Sep 21, 3:16 PM EDT, 2 hours 9 minutes before

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In the hours before

Local storm report, Sep 21, 1:16 PM EDT, 4 hours 9 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
116 PM EDT MON SEP 21 2009

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

1257 PM     FLASH FLOOD      4 W TOCCOA              34.58N 83.39W
09/20/2009                   STEPHENS           GA   LAW ENFORCEMENT

            HIGHWAY 17 AND 441 CLOSED DUE TO FLOODING.

&&

LG

Local storm report, Sep 21, 1:19 PM EDT, 4 hours 6 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
119 PM EDT MON SEP 21 2009

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

0640 AM     FLOOD            LAKE LURE               35.44N 82.21W
09/20/2009                   RUTHERFORD         NC   COUNTY OFFICIAL

            SEVERAL ROADS AROUND LAKE LURE HAVE WATER COVERED AREAS.

&&

LG

Local storm report, Sep 21, 1:20 PM EDT, 4 hours 5 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
120 PM EDT MON SEP 21 2009

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

1050 AM     FLOOD            3 E HENDERSONVILLE      35.32N 82.41W
09/20/2009                   HENDERSON          NC   LAW ENFORCEMENT

            DANA AND HOWARD GAP ROADS FLOODED DUE TO STREAM.

&&

LG

Local storm report, Sep 21, 3:43 PM EDT, 1 hour 42 minutes before

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Local storm report, Sep 21, 3:45 PM EDT, 1 hour 40 minutes before

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Special weather statement, Sep 21, 5:18 PM EDT, 7 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 21, 3:00 AM EDT	Areal Flood Warning	GSP	Macon	6 hr
Sep 21, 9:14 AM EDT	Areal Flood Warning	GSP	Transylvania	6 hr
Sep 21, 9:20 AM EDT	Areal Flood Warning	GSP	Macon	6 hr
Sep 21, 2:46 PM EDT	Areal Flood Warning	GSP	Buncombe, Haywood, Henderson, Jackson, Macon, Madison and 2 more	3 hr
Sep 21, 5:34 PM EDT	Areal Flood Warning	GSP	Henderson, Transylvania	7 hr
Sep 21, 5:46 PM EDT	Areal Flood Warning	GSP	Buncombe, Haywood	3 hr
Sep 20, 8:06 PM EDT	Areal Flood Warning	GSP	Oconee	4 hr
Sep 21, 12:04 AM EDT	Areal Flood Warning	GSP	Oconee	3 hr
Sep 21, 6:28 PM EDT	Areal Flood Advisory	GSP	Pickens	62 min
Sep 21, 7:40 PM EDT	Areal Flood Advisory	GSP	Pickens	50 min
Sep 21, 5:10 PM EDT	Areal Flood Warning	GSP	Habersham, Rabun	7 hr

Nearby

Areal Flood Warnings in North Carolina, 2009 Every areal flood warning in 2009

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.