Alert archive / North Carolina / Flash Flood Watches in 2013

Flash Flood Watch 4, NWS Raleigh, NC

July 11, 201331 counties in North Carolina

NWS Raleigh, NC issued this flash flood watch at Jul 11, 2013, 10:46 AM EDT for 31 counties in North Carolina. It was in force for 34 hr.

The area

The counties it named.

The facts

Issued: Jul 11, 2013, 10:46 AM EDT (14:46 UTC)
Expired: Jul 12, 2013, 9:00 PM EDT
In force: 34 hr
Issued by: NWS Raleigh, NC
Flood severity: None

All 31 counties

Alamance County, NC, Anson County, NC, Chatham County, NC, Cumberland County, NC, Davidson County, NC, Durham County, NC, Edgecombe County, NC, Forsyth County, NC, Franklin County, NC, Granville County, NC, Guilford County, NC, Halifax County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, Orange County, NC, Person County, NC, Randolph County, NC, Richmond County, NC, Sampson County, NC, Scotland County, NC, Stanly County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Wayne County, NC, Wilson County, NC

The radar

The Raleigh/Durham radar (KRAX), 45 km from the middle of the area, began a volume at 14:45 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, 2.8 hours before the alert went out and 93 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: 534 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 533 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 23 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Raleigh, NC wrote its last area forecast discussion before this flash flood watch went out at Jul 11, 6:30 AM EDT, 4 hours 16 minutes earlier.

Area forecast discussion, Jul 11, 6:30 AM EDT, 4 hours 16 minutes before

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Hazardous weather outlook, Jul 11, 5:58 AM EDT, 4 hours 48 minutes before

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In the hours before

Special weather statement, Jul 11, 10:28 AM EDT, 18 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
1028 AM EDT THU JUL 11 2013

NCZ073-074-083-111600-
ANSON-MONTGOMERY-STANLY-
1028 AM EDT THU JUL 11 2013

...SHOWERS AND ISOLATED THUNDERSTORMS PRODUCING HEAVY RAIN WILL MOVE
ACROSS STANLY...MONTGOMERY AND ANSON COUNTIES THROUGH NOON EDT...

AT 1023 AM EDT...DOPPLER RADAR INDICATED SHOWERS AND THUNDERSTORMS
WITH VERY HEAVY RAIN MOVING INTO WESTERN STANLY COUNTY...MOVING EAST
AT 15 MPH.

SOME LOCATIONS IMPACTED INCLUDE...FINGER...PLYLER... PLYLER...
ALBEMARLE...NORWOOD...BADIN...BADIN LAKE.

HAZARDS INCLUDE...
HEAVY RAINFALL AND MINOR FLOODING.

HEAVY RAIN MOVING SLOWLY ACROSS THE AREA MAY RESULT IN PONDED WATER
ON ROADS...STANDING WATER IN LOW LYING AREAS AND MINOR FLOODING
OF CREEKS...STREAMS AND AREAS OF POOR DRAINAGE. DRIVERS ARE URGED TO
SLOW DOWN AND USE EXTRA CAUTION TO AVOID HYDROPLANING...ESPECIALLY
IN URBAN AREAS WHERE PROLONGED HEAVY RAIN CAN QUICKLY LEAD TO FLASH
FLOODING.

IF ON OR NEAR BADIN LAKE OR ON THE YADKIN/PEE DEE RIVER BELOW THE
LAKE...GET OUT OF THE WATER AS LIGHTNING STRIKES CAN OCCUR WELL
AHEAD OF AN APPROACHING STORM...WELL AHEAD OF THE ARRIVAL OF RAIN
AND WIND. IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING. MOVE TO SAFE SHELTER NOW. DON'T BE CAUGHT ON
THE WATER IN A THUNDERSTORM!

&&

LAT...LON 3550 8030 3551 8005 3514 8003 3514 8007
      3512 8007 3512 8029 3519 8029 3516 8035
      3517 8038 3516 8039 3516 8046 3519 8051
TIME...MOT...LOC 1423Z 267DEG 13KT 3531 8045

13

The office that day

Everything else NWS Raleigh, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 10, 8:20 PM EDT	Areal Flood Advisory	RAH	Guilford	3 hr
Jul 10, 9:11 PM EDT	Special Weather Statement	RAH	Alamance, Chatham, Durham, Orange	49 min
Jul 10, 10:19 PM EDT	Flash Flood Warning	RAH	Guilford	3 hr
Jul 11, 10:28 AM EDT	Special Weather Statement	RAH	Stanly	92 min
Jul 11, 11:34 AM EDT	Special Weather Statement	RAH	Alamance, Chatham, Davidson, Randolph	86 min
Jul 11, 11:42 AM EDT	Flash Flood Warning	RAH	Davidson, Guilford, Randolph	2 hr
Jul 11, 11:53 AM EDT	Special Weather Statement	RAH	Person, Vance	52 min
Jul 11, 1:06 PM EDT	Areal Flood Advisory	RAH	Durham, Granville, Orange, Person, Vance, Warren	84 min
Jul 11, 2:44 PM EDT	Special Weather Statement	RAH	Anson	61 min
Jul 11, 3:14 PM EDT	Areal Flood Advisory	RAH	Anson	76 min
Jul 11, 3:38 PM EDT	Special Weather Statement	RAH	Hoke, Scotland	37 min
Jul 11, 5:27 PM EDT	Areal Flood Advisory	RAH	Moore	93 min
Jul 11, 7:23 PM EDT	Special Weather Statement	RAH	Davidson, Forsyth, Guilford	52 min
Jul 11, 7:38 PM EDT	Areal Flood Advisory	RAH	Davidson, Forsyth	112 min

Nearby

Flash Flood Watches in North Carolina, 2013 Every flash flood watch in 2013

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.