Alert archive / North Carolina / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 200, NWS Raleigh, NC

August 5, 2010Davidson County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Aug 5, 2010, 4:18 PM EDT for Davidson County, North Carolina. It was in force for 57 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 5, 2010, 4:18 PM EDT (20:18 UTC)
Expired: Aug 5, 2010, 5:15 PM EDT
In force: 57 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon

County Davidson County, NC

The radar

The Roanoke radar (KFCX), 137 km from the middle of the area, began a volume at 20:18 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 5, 3:31 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.3 hours before the alert went out and 43 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: 2373 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 930 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 72 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.0

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 5, 3:25 PM EDT, 53 minutes earlier.

Area forecast discussion, Aug 5, 3:25 PM EDT, 53 minutes before

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Hazardous weather outlook, Aug 5, 3:41 PM EDT, 37 minutes before

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In the hours before

Special weather statement, Aug 5, 2:40 PM EDT, 1 hour 38 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
240 PM EDT THU AUG 5 2010

NCZ022>024-039-040-051945-
ALAMANCE-CHATHAM-GUILFORD-ORANGE-RANDOLPH-
240 PM EDT THU AUG 5 2010

...A STRONG THUNDERSTORM WILL MOVE ACROSS PARTS OF GUILFORD...
ALAMANCE...ORANGE...RANDOLPH AND CHATHAM COUNTIES THROUGH 345 PM
EDT...

AT 239 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER
LIBERTY...OR ABOUT 10 MILES EAST OF RANDLEMAN...MOVING NORTHEAST AT
30 MPH.

SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...
ALAMANCE...SWEPSONVILLE...GRAHAM...HAW RIVER...AND MEBANE.

HAZARDS INCLUDE...
PEA SIZE HAIL.
GUSTY WINDS OF 30 TO 40 MPH.
OCCASIONAL LIGHTNING.

IF A THUNDERSTORM MOVES NEARBY OR OVERHEAD...SEEK SAFE SHELTER IN A
NEARLY BUILDING OR VEHICLE. STRONG WINDS ARE CAPABLE OF KNOCKING
DOWN BLOWING AROUND LIGHT OBJECTS LEFT OUTDOORS. BRIEFLY HEAVY RAIN
WILL CAUSE PONDING OF WATER ON ROADS AND POOR VISIBILITY.

&&

LAT...LON 3624 7949 3623 7924 3576 7926 3561 7968
      3582 7987
TIME...MOT...LOC 1839Z 229DEG 27KT 3588 7960

DJF

Local storm report, Aug 5, 3:30 PM EDT, 48 minutes before

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Local storm report, Aug 5, 3:52 PM EDT, 26 minutes before

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Local storm report, Aug 5, 3:54 PM EDT, 24 minutes before

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Local storm report, Aug 5, 3:55 PM EDT, 23 minutes before

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Local storm report, Aug 5, 4:00 PM EDT, 18 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 4, 10:13 PM EDT	Special Weather Statement	RAH	Granville, Person, Vance, Warren	77 min
Aug 4, 10:26 PM EDT	Severe Thunderstorm Warning	RAH	Granville, Halifax, Vance, Warren	40 min
Aug 4, 11:03 PM EDT	Special Weather Statement	RAH	Franklin, Halifax, Nash	57 min
Aug 4, 11:28 PM EDT	Special Weather Statement	RAH	Durham, Orange	62 min
Aug 4, 11:47 PM EDT	Areal Flood Advisory	RAH	Halifax	103 min
Aug 5, 12:09 AM EDT	Special Weather Statement	RAH	Edgecombe, Nash, Wilson	66 min
Aug 5, 12:16 AM EDT	Severe Thunderstorm Warning	RAH	Durham, Wake	44 min
Aug 5, 12:38 AM EDT	Severe Thunderstorm Warning	RAH	Johnston, Wake	52 min
Aug 5, 12:52 AM EDT	Special Weather Statement	RAH	Wake	38 min
Aug 5, 1:15 AM EDT	Areal Flood Advisory	RAH	Wake	3 hr
Aug 5, 1:16 AM EDT	Special Weather Statement	RAH	Wayne, Wilson	59 min
Aug 5, 1:43 AM EDT	Special Weather Statement	RAH	Wake	62 min
Aug 5, 2:14 AM EDT	Areal Flood Advisory	RAH	Wake	106 min
Aug 5, 2:22 AM EDT	Special Weather Statement	RAH	Harnett, Wayne	53 min
Aug 5, 2:40 AM EDT	Severe Thunderstorm Warning	RAH	Johnston	50 min
Aug 5, 3:24 AM EDT	Areal Flood Advisory	RAH	Johnston	96 min
Aug 5, 4:15 AM EDT	Special Weather Statement	RAH	Sampson	90 min
Aug 5, 2:22 PM EDT	Special Weather Statement	RAH	Davidson, Forsyth, Guilford	93 min
Aug 5, 2:40 PM EDT	Special Weather Statement	RAH	Alamance	65 min
Aug 5, 3:03 PM EDT	Severe Thunderstorm Warning	RAH	Alamance	57 min
Aug 5, 3:27 PM EDT	Severe Thunderstorm Warning	RAH	Orange	32 min
Aug 5, 4:22 PM EDT	Special Weather Statement	RAH	Forsyth	53 min
Aug 5, 4:40 PM EDT	Special Weather Statement	RAH	Alamance	35 min
Aug 5, 4:50 PM EDT	Severe Thunderstorm Warning	RAH	Davidson, Forsyth, Guilford	40 min
Aug 5, 5:03 PM EDT	Severe Thunderstorm Warning	RAH	Person	57 min
Aug 5, 5:13 PM EDT	Severe Thunderstorm Warning	RAH	Davidson, Randolph	47 min
Aug 5, 5:28 PM EDT	Severe Thunderstorm Warning	RAH	Granville	50 min
Aug 5, 5:30 PM EDT	Severe Thunderstorm Warning	RAH	Guilford	43 min
Aug 5, 5:45 PM EDT	Special Weather Statement	RAH	Montgomery, Randolph, Stanly	60 min
Aug 5, 5:47 PM EDT	Severe Thunderstorm Warning	RAH	Alamance, Orange	58 min
Aug 5, 6:01 PM EDT	Special Weather Statement	RAH	Vance	59 min
Aug 5, 6:06 PM EDT	Severe Thunderstorm Warning	RAH	Alamance, Orange	39 min
Aug 5, 6:40 PM EDT	Severe Thunderstorm Warning	RAH	Durham, Granville, Orange	50 min
Aug 5, 6:56 PM EDT	Special Weather Statement	RAH	Franklin, Halifax, Nash	64 min
Aug 5, 7:13 PM EDT	Severe Thunderstorm Warning	RAH	Wake	47 min
Aug 5, 7:19 PM EDT	Special Weather Statement	RAH	Cumberland, Harnett, Hoke, Johnston, Lee, Richmond and 1 more	56 min
Aug 5, 7:31 PM EDT	Severe Thunderstorm Warning	RAH	Edgecombe, Halifax, Nash, Wilson	59 min
Aug 5, 7:40 PM EDT	Areal Flood Advisory	RAH	Anson, Richmond	110 min
Aug 5, 7:42 PM EDT	Areal Flood Advisory	RAH	Wake	108 min
Aug 5, 7:47 PM EDT	Areal Flood Advisory	RAH	Franklin	103 min
Aug 5, 7:54 PM EDT	Flash Flood Warning	RAH	Wake	111 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.