Alert archive / North Carolina / Special Weather Statements in 2012

Special Weather Statement, NWS Raleigh, NC

July 11, 20128 counties in North Carolina

NWS Raleigh, NC issued this special weather statement at Jul 11, 2012, 2:09 PM EDT for 8 counties in North Carolina. It was in force for 51 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: Jul 11, 2012, 2:09 PM EDT (18:09 UTC)
Expired: Jul 11, 2012, 3:00 PM EDT
In force: 51 min
Issued by: NWS Raleigh, NC

Counties Alamance County, NC, Durham County, NC, Forsyth County, NC, Guilford County, NC, Johnston County, NC, Orange County, NC, Wake County, NC, Wayne County, NC

The radar

The Raleigh/Durham radar (KRAX), 73 km from the middle of the area, began a volume at 18:11 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, 6.2 hours before the alert went out and 62 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: 44 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 774 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -18 m²/s²
0-3 km storm-relative helicity: 41 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Raleigh, NC wrote its last area forecast discussion before this special weather statement went out at Jul 11, 1:35 PM EDT, 34 minutes earlier.

Area forecast discussion, Jul 11, 1:35 PM EDT, 34 minutes before

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Hazardous weather outlook, Jul 11, 4:31 AM EDT, 9 hours 38 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RALEIGH NC
431 AM EDT WED JUL 11 2012

NCZ007>011-021>028-038>043-073>078-083>086-088-089-120845-
PERSON-GRANVILLE-VANCE-WARREN-HALIFAX-FORSYTH-GUILFORD-ALAMANCE-
ORANGE-DURHAM-FRANKLIN-NASH-EDGECOMBE-DAVIDSON-RANDOLPH-CHATHAM-WAKE-
JOHNSTON-WILSON-STANLY-MONTGOMERY-MOORE-LEE-HARNETT-WAYNE-ANSON-
RICHMOND-SCOTLAND-HOKE-CUMBERLAND-SAMPSON-
431 AM EDT WED JUL 11 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NORTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

A FEW ISOLATED SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE EARLY
THIS MORNING...WITH GREATER COVERAGE EXPECTED LATER THIS
AFTERNOON. LOCALLY HEAVY RAINFALL AND MINOR FLOODING WILL BE
POSSIBLE...ESPECIALLY IN AREAS WHERE HEAVY RAIN HAS ALREADY FALLEN
OVER THE LAST COUPLE OF DAYS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

SHOWERS AND THUNDERSTORMS WITH LOCALLY HEAVY RAIN ARE POSSIBLE
AGAIN THURSDAY. OTHERWISE... HAZARDOUS WEATHER IS NOT
EXPECTED AT THIS TIME.

In the hours before

Local storm report, Jul 11, 10:40 AM EDT, 3 hours 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
1040 AM EDT WED JUL 11 2012

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

0534 PM     TSTM WND DMG     3 NNE EAGLE SPRINGS     35.34N  79.64W
07/10/2012                   MOORE              NC   911 CALL CENTER

            TREE DOWN ON BENSALEM CHURCH ROAD... TIME ESTIMATED BY
            RADAR

&&

EVENT NUMBER RAH1200621

SEC

Special weather statement, Jul 11, 2:09 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
209 PM EDT WED JUL 11 2012

NCZ021>025-038-040>043-078-111900-
ALAMANCE-CHATHAM-DAVIDSON-DURHAM-FORSYTH-GUILFORD-JOHNSTON-ORANGE-
WAKE-WAYNE-WILSON-
209 PM EDT WED JUL 11 2012

...A RAGGED LINE OF HEAVY SHOWERS AND ISOLATED THUNDERSTORMS
STRETCHED FROM THE TRIAD EAST ALONG THE INTERSTATE 40 CORRIDOR TO
THE TRIANGE. THIS LINE THEN RANGED FROM THE TRIANGLE SOUTHEAST TO
GOLDSBORO. THESE SHOWERS AND STORMS WERE MOVING SLOWLY SOUTH AROUND
5 MPH.

SHOWERS AND ISOLATED STORMS MAY BE EXPECTED OVER WAYNE...
JOHNSTON...WILSON...WAKE...ORANGE...GUILFORD...FORSYTH...DURHAM...
DAVIDSON...CHATHAM AND ALAMANCE COUNTIES THROUGH 300 PM EDT.

LOCATIONS IN THE PATH OF THESE SHOWERS INCLUDE...THE TRIAD...
BURLINGTON...DURHAM...CHAPEL HILL...RALEIGH...GARNER... APEX...
HOLLY SPRINGS...CLAYTON...SMITHFIELD AND GOLDSBORO.

HAZARDS INCLUDE...
HEAVY RAINFALL AND MINOR FLOODING.

THESE SHOWERS WILL PRODUCE HEAVY RAINFALL AND ARE MOVING SLOWLY. UP
TO TWO INCHES OF RAIN ARE POSSIBLE THIS AFTERNOON...WHICH COULD
CAUSE MINOR FLOODING OF LOW LYING AREAS INCLUDING DITCHES...
CREEKS...ROADS AND OTHER AREAS OF POOR DRAINAGE. AVOID THESE AREAS
AND DO NOT CROSS FLOODED ROADS. MOTORISTS SHOULD ALSO REDUCE DRIVING
SPEEDS TO AVOID HYDROPLANING.

&&

LAT...LON 3614 8044 3626 8046 3625 7931 3615 7898
      3580 7824 3573 7820 3575 7814 3559 7780
      3524 7782 3582 7924 3604 8050 3609 8052
TIME...MOT...LOC 1801Z 217DEG 3KT 3620 8040 3602 7910
          3542 7784

13

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 12:08 AM EDT	Areal Flood Advisory	RAH	Alamance, Guilford	3 hr
Jul 11, 1:55 AM EDT	Special Weather Statement	RAH	Davidson, Randolph	80 min
Jul 11, 3:01 AM EDT	Special Weather Statement	RAH	Chatham, Davidson, Randolph	89 min
Jul 11, 3:39 AM EDT	Flash Flood Warning	RAH	Davidson, Randolph	3 hr
Jul 11, 3:17 PM EDT	Areal Flood Advisory	RAH	Edgecombe, Wilson	61 min
Jul 11, 3:25 PM EDT	Special Weather Statement	RAH	Alamance, Durham, Franklin, Johnston, Orange, Wake	50 min
Jul 11, 4:27 PM EDT	Special Weather Statement	RAH	Sampson	63 min
Jul 11, 5:27 PM EDT	Special Weather Statement	RAH	Hoke, Scotland	63 min
Jul 11, 6:01 PM EDT	Tornado Warning	RAH	Scotland	18 min
Jul 11, 6:28 PM EDT	Special Weather Statement	RAH	Anson, Richmond, Scotland	62 min
Jul 11, 7:05 PM EDT	Special Weather Statement	RAH	Bladen	55 min

Nearby

Special Weather Statements in North Carolina, 2012 Every special weather statement in 2012

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.