Alert archive / North Carolina / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 38, NWS Raleigh, NC

May 27, 2010Granville County, Vance County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at May 27, 2010, 7:24 PM EDT for Granville County, Vance County, North Carolina. It was in force for 38 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: May 27, 2010, 7:24 PM EDT (23:24 UTC)
Expired: May 27, 2010, 8:02 PM EDT
In force: 38 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon

Counties Granville County, NC, Vance County, NC

The radar

The Raleigh/Durham radar (KRAX), 75 km from the middle of the area, began a volume at 23:27 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

Roanoke, VA (KRNK), launched 12:00Z, 11.4 hours before the alert went out and 129 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: 538 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 1055 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 91 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 May 27, 5:55 PM EDT, 1 hour 29 minutes earlier.

Area forecast discussion, May 27, 5:55 PM EDT, 1 hour 29 minutes before

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Hazardous weather outlook, May 27, 3:10 PM EDT, 4 hours 14 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RALEIGH NC
310 PM EDT THU MAY 27 2010

NCZ007>011-021>028-038>043-073>078-083>086-088-089-281130-
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-
310 PM EDT THU MAY 27 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NORTH CAROLINA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

SHOWERS AND THUNDERSTORMS... SOME STRONG TO SEVERE... ARE
EXPECTED TO BECOME NUMEROUS FRIDAY AFTERNOON AND EVENING... AS
AS A COLD FRONT DRIFTS SOUTHWESTWARD ACROSS THE AREA. THE MAIN
SEVERE WEATHER HAZARDS WILL BE DAMAGING DOWNBURST WINDS AND
LARGE HAIL UP TO THE SIZE OF QUARTERS. IN ADDITION... THE EXPECTED
SLOW MOVEMENT OF THE SHOWERS AND STORMS WILL RESULT IN LOCALIZED EXCESSIVE
RAINFALL AND AN ASSOCIATED RISK OF FLOODING. THE THREAT OF SEVERE
THUNDERSTORMS WILL BE GREATEST BETWEEN 2 PM AND 10 PM... BUT THE
THREAT OF LOCALIZED FLOODING WILL CONTINUE THROUGHOUT THE NIGHT.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION MAY BE NEEDED... PARTICULARLY BETWEEN 2 PM
AND 10 PM FRIDAY AFTERNOON AND EVENING.

MWS

In the hours before

Local storm report, May 27, 6:11 PM EDT, 1 hour 13 minutes before

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Local storm report, May 27, 6:13 PM EDT, 1 hour 11 minutes before

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Local storm report, May 27, 6:17 PM EDT, 1 hour 7 minutes before

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Local storm report, May 27, 6:38 PM EDT, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
638 PM EDT THU MAY 27 2010

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

0628 PM     TSTM WND DMG     5 NE LITTLETON          36.48N 77.84W
05/27/2010                   HALIFAX            NC   LAW ENFORCEMENT

            HALIFAX CO SHERIFF DEPUTY REPORTED TREES AND POWER LINES
            DOWN ON ROAD AT HWY 158 AND MYRICK ESTATES RD.

&&

TDH

Local storm report, May 27, 6:41 PM EDT, 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
641 PM EDT THU MAY 27 2010

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

0620 PM     TSTM WND DMG     5 WNW ROSEMARY          36.47N 77.79W
05/27/2010                   HALIFAX            NC   TRAINED SPOTTER

            SPOTTER REPORTED TREES AND POWER LINES DOWN AT 5621
            THELMA RD IN ROANOKE RAPIDS. TREE DOWN OVER RD.

&&

TDH

Local storm report, May 27, 6:51 PM EDT, 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
651 PM EDT THU MAY 27 2010

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

0625 PM     HAIL             5 WNW ROSEMARY          36.47N 77.78W
05/27/2010  E1.00 INCH       HALIFAX            NC   LAW ENFORCEMENT

            QUARTER HAIL DRIVEN BY ESTIMATED 60-65 MPH WINDS.
            NUMEROUS TREES AND POWER LINES DOWN ALONG A THREE MILE
            STRETCH OF THELMA ROAD.

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 5:02 PM EDT	Special Weather Statement	RAH	Halifax	13 min
May 27, 5:19 PM EDT	Special Weather Statement	RAH	Halifax	26 min
May 27, 5:52 PM EDT	Severe Thunderstorm Warning	RAH	Halifax	38 min
May 27, 6:05 PM EDT	Special Weather Statement	RAH	Warren	25 min
May 27, 6:22 PM EDT	Severe Thunderstorm Warning	RAH	Halifax, Warren	38 min
May 27, 6:41 PM EDT	Severe Thunderstorm Warning	RAH	Edgecombe, Halifax, Nash	25 min
May 27, 6:51 PM EDT	Severe Thunderstorm Warning	RAH	Franklin, Warren	39 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2010 Every severe thunderstorm warning in 2010

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.