Alert archive / North Carolina / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 299, NWS Raleigh, NC

August 11, 2009Johnston County, Wayne County, Wilson County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Aug 11, 2009, 7:56 PM EDT for Johnston County, Wayne County, Wilson County, North Carolina. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 11, 2009, 7:56 PM EDT (23:56 UTC)
Expired: Aug 11, 2009, 8:45 PM EDT
In force: 49 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon

Counties Johnston County, NC, Wayne County, NC, Wilson County, NC

The radar

The Raleigh/Durham radar (KRAX), 39 km from the middle of the area, began a volume at 23:56 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 11, 3:21 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Newport, NC (KMHX), launched 12:00Z, 11.9 hours before the alert went out and 138 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: 15 J/kg
Mixed-layer CIN: -226 J/kg
Mixed-layer LCL: 1537 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 68 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 severe thunderstorm warning 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 severe thunderstorm warning went out at Aug 11, 7:47 PM EDT, 9 minutes earlier.

Area forecast discussion, Aug 11, 7:47 PM EDT, 9 minutes before

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Hazardous weather outlook, Aug 11, 6:15 PM EDT, 1 hour 41 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RALEIGH NC
615 PM EDT TUE AUG 11 2009

NCZ007>011-024>028-040>043-074>078-083>086-088-089-122215-
PERSON-GRANVILLE-VANCE-WARREN-HALIFAX-ORANGE-DURHAM-FRANKLIN-NASH-
EDGECOMBE-CHATHAM-WAKE-JOHNSTON-WILSON-MONTGOMERY-MOORE-LEE-HARNETT-
WAYNE-ANSON-RICHMOND-SCOTLAND-HOKE-CUMBERLAND-SAMPSON-
615 PM EDT TUE AUG 11 2009

...SEVERE THUNDERSTORM WATCH 699 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NORTH CAROLINA.

.DAY ONE...THROUGH TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   SEVERE THUNDERSTORM WATCH.

SCATTERED THUNDERSTORMS ARE EXPECTED TO DRIFT EAST INTO THE AREA
LATE THIS AFTERNOON AND THIS EVENING. A FEW STORMS MAY BE SEVERE
PRODUCING WIND GUSTS UP TO 60 MPH. SMALL HAIL AND FREQUENT TO
CONTINUOUS LIGHTNING STRIKES ARE ALSO PROBABLE WITH THE STRONGER
STORMS. THE HEAVY RAIN ASSOCIATED WITH THE STORMS MAY ALSO PRODUCE
MINOR STREET FLOODING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

PERIODS OF SHOWERS AND THUNDERSTORMS WITH HEAVY RAIN ARE EXPECTED
WEDNESDAY NIGHT THROUGH FRIDAY. RAINFALL MAY BE EXCESSIVE IN
SPOTS...LEADING TO FLASH FLOODING ALONG CREEKS AND STREAMS AS WELL
AS FLOODING IN URBANIZED AREAS.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION WILL LIKELY BE NEEDED THROUGH 1000 PM. SPOTTERS
SHOULD REPORT SEVERE WEATHER AS SOON AS IT IS SAFE TO DO SO. PLEASE
STAY TUNED FOR LATER WATCHES AND WARNINGS.

NCZ021>023-038-039-073-122215-
FORSYTH-GUILFORD-ALAMANCE-DAVIDSON-RANDOLPH-STANLY-
615 PM EDT TUE AUG 11 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NORTH CAROLINA.

.DAY ONE...THROUGH TONIGHT.

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

PERIODS OF SHOWERS AND THUNDERSTORMS WITH HEAVY RAIN ARE EXPECTED
WEDNESDAY NIGHT THROUGH FRIDAY. RAINFALL MAY BE EXCESSIVE IN
SPOTS...LEADING TO FLASH FLOODING ALONG CREEKS AND STREAMS AS WELL
AS FLOODING IN URBANIZED AREAS.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION MAY BE NEEDED WEDNESDAY. SPOTTERS
SHOULD REPORT SEVERE WEATHER AS SOON AS IT IS SAFE TO DO SO.
PLEASE STAY TUNED FOR LATER WATCHES AND WARNINGS.

BADGETT

In the hours before

Local storm report, Aug 11, 6:19 PM EDT, 1 hour 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
619 PM EDT TUE AUG 11 2009

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

0615 PM     TSTM WND DMG     OXFORD                  36.31N 78.59W
08/11/2009                   GRANVILLE          NC   LAW ENFORCEMENT

            TREES DOWN ACROSS GRANVILLE COUNTY.

&&

SMITH

Local storm report, Aug 11, 7:02 PM EDT, 54 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE RALEIGH NC
702 PM EDT TUE AUG 11 2009

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

0520 PM     TSTM WND DMG     3 WNW SEAGROVE          35.55N 79.83W
08/11/2009                   RANDOLPH           NC   TRAINED SPOTTER

            TREE ON A MOBILE HOME ON NEW HOPE CHURCH RD. RADAR
            ESTIMATED TIME.

&&

SMITH

Local storm report, Aug 11, 7:03 PM EDT, 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
703 PM EDT TUE AUG 11 2009

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

0614 PM     TSTM WND DMG     1 W HENDERSON           36.33N 78.42W
08/11/2009                   VANCE              NC   LAW ENFORCEMENT

            ONE TREE DOWN ON INTERSTATE 85 BETWEEN MILE MARKERS 214
            AND 215.

&&

WFORAH

Local storm report, Aug 11, 7:14 PM EDT, 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
714 PM EDT TUE AUG 11 2009

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

0630 PM     TSTM WND DMG     2 S ELLERBE             35.04N 79.76W
08/11/2009                   RICHMOND           NC   LAW ENFORCEMENT

            ONE TREE WAS BLOWN DOWN ON HAYWOOD CEMETERY ROAD.

&&

WFORAH

Local storm report, Aug 11, 7:18 PM EDT, 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
718 PM EDT TUE AUG 11 2009

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

0630 PM     TSTM WND DMG     LOUISBURG               36.10N 78.30W
08/11/2009                   FRANKLIN           NC   LAW ENFORCEMENT

            911 CENTER REPORTS NUMEROUS TREES DOWN ACROSS FRANKLIN
            COUNTY.

&&

SMITH

Local storm report, Aug 11, 7:34 PM EDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
734 PM EDT TUE AUG 11 2009

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

0702 PM     HAIL             CASTALIA                36.08N 78.06W
08/11/2009  E0.88 INCH       NASH               NC   PUBLIC

            NICKEL SIZE HAIL REPORTED BY PUBLIC IN CASTALIA.

&&

SMITH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 4:55 PM EDT	Severe Thunderstorm Warning	RAH	Randolph	33 min
Aug 11, 5:02 PM EDT	Severe Thunderstorm Warning	RAH	Granville, Person	43 min
Aug 11, 5:32 PM EDT	Severe Thunderstorm Warning	RAH	Durham, Orange	43 min
Aug 11, 5:40 PM EDT	Severe Thunderstorm Warning	RAH	Granville, Person, Vance	55 min
Aug 11, 5:51 PM EDT	Severe Thunderstorm Warning	RAH	Sampson	54 min
Aug 11, 5:51 PM EDT	Severe Thunderstorm Warning	RAH	Durham, Franklin, Granville, Vance, Wake	47 min
Aug 11, 6:16 PM EDT	Severe Thunderstorm Warning	RAH	Franklin, Vance, Wake, Warren	44 min
Aug 11, 6:24 PM EDT	Severe Thunderstorm Warning	RAH	Moore, Richmond	51 min
Aug 11, 6:54 PM EDT	Severe Thunderstorm Warning	RAH	Franklin, Halifax, Nash, Warren	51 min
Aug 11, 7:19 PM EDT	Severe Thunderstorm Warning	RAH	Edgecombe, Halifax, Nash	56 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2009 Every severe thunderstorm 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.