Alert archive / North Carolina / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 29, NWS Raleigh, NC

May 23, 2010Wake County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at May 23, 2010, 3:08 PM EDT for Wake County, North Carolina. It was in force for 52 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 23, 2010, 3:08 PM EDT (19:08 UTC)
Expired
May 23, 2010, 4:00 PM EDT
In force
52 min
Issued by
NWS Raleigh, NC
Area
Storm-based polygon

County Wake County, NC

The radar

The Raleigh/Durham radar (KRAX), 20 km from the middle of the area, began a volume at 19:11 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

Roanoke, VA (KRNK), launched 12:00Z, 7.1 hours before the alert went out and 174 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-pSkew-T log-p diagram, Roanoke, VA at 12:00Z on 2010-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Roanoke, VA at 12:00Z on 2010-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
3 J/kg
Mixed-layer CIN
-46 J/kg
Mixed-layer LCL
759 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
-7 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.

Hazardous weather outlook, May 22, 3:45 PM EDT, 23 hours 23 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RALEIGH NC
345 PM EDT SAT MAY 22 2010

NCZ007>011-021>028-038>043-073>078-083>086-088-089-230930-
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-
345 PM EDT SAT MAY 22 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NORTH CAROLINA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

ISOLATED SEVERE STORMS ARE POSSIBLE LATE THIS AFTERNOON THROUGH
EARLY EVENING. THE MAIN WEATHER THREATS WILL BE ISOLATED WIND
GUSTS TO NEAR 60 MPH AND LARGE HAIL TO THE SIZE OF QUARTERS. THE
CHANCE FOR A SEVERE STORM APPEARS TO BE BEST OVER THE WESTERN AND
SOUTHERN PIEDMONT INCLUDING THE TRIAD REGION AS WELL AS
ALBEMARLE...TROY AND ROCKINGHAM. THE THREAT FOR ISOLATED SEVERE
THUNDERSTORMS SHOULD END AROUND 9 PM.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

ISOLATED SEVERE STORMS ARE POSSIBLE SUNDAY AFTERNOON. THE MAIN
SEVERE WEATHER THREATS WILL BE ISOLATED WIND GUSTS NEAR 60 MPH AND
HAIL TO THE SIZE OF QUARTERS. THE MOST LIKELY TIME FOR ANY
ISOLATED SEVERE STORMS WILL BE 1 PM TO 9 PM. THE THREAT AREA WILL
BE ALONG AND SOUTH OF A LINE FROM GREENSBORO TO RALEIGH TO
GOLDSBORO.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTERS ARE ENCOURAGED TO REPORT ANY SEVERE OR
SIGNIFICANT WEATHER IMMEDIATELY TO THE NATIONAL
WEATHER SERVICE.

The office that day

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

IssuedProductOfficeCountiesLasted
May 22, 8:04 PM EDTFlash Flood WarningRAHDurham, Orange2 hr
May 22, 8:18 PM EDTSpecial Weather StatementRAHWarren57 min
May 22, 8:53 PM EDTAreal Flood AdvisoryRAHDavidson, Montgomery83 min
May 23, 12:37 AM EDTAreal Flood AdvisoryRAHForsyth3 hr
May 23, 4:21 AM EDTSpecial Weather StatementRAHGuilford54 min
May 23, 7:05 AM EDTSpecial Weather StatementRAHLee55 min
May 23, 7:59 AM EDTSpecial Weather StatementRAHWake61 min
May 23, 8:34 AM EDTAreal Flood AdvisoryRAHWake2 hr
May 23, 8:39 AM EDTSpecial Weather StatementRAHWake66 min
May 23, 9:11 AM EDTSpecial Weather StatementRAHJohnston, Wake49 min
May 23, 10:00 AM EDTSpecial Weather StatementRAHJohnston, Wayne, Wilson90 min
May 23, 11:13 AM EDTSpecial Weather StatementRAHEdgecombe62 min
May 23, 11:15 AM EDTSpecial Weather StatementRAHSampson60 min
May 23, 11:31 AM EDTSpecial Weather StatementRAHWayne59 min
May 23, 12:19 PM EDTSpecial Weather StatementRAHBladen41 min
May 23, 1:32 PM EDTFlash Flood WarningRAHHalifax99 min
May 23, 1:49 PM EDTSpecial Weather StatementRAHHalifax56 min
May 23, 2:04 PM EDTSpecial Weather StatementRAHFranklin41 min
May 23, 2:11 PM EDTSevere Thunderstorm WarningRAHFranklin, Granville, Wake49 min
May 23, 2:43 PM EDTSpecial Weather StatementRAHHalifax62 min
May 23, 3:39 PM EDTSpecial Weather StatementRAHWarren66 min
May 23, 3:50 PM EDTSevere Thunderstorm WarningRAHHarnett, Johnston, Wake14 min
May 23, 4:11 PM EDTSpecial Weather StatementRAHWarren64 min
May 23, 4:35 PM EDTSevere Thunderstorm WarningRAHVance, Warren34 min
May 23, 5:11 PM EDTSpecial Weather StatementRAHChatham64 min
May 23, 5:35 PM EDTAreal Flood AdvisoryRAHChatham3 hr
May 23, 5:46 PM EDTSpecial Weather StatementRAHGranville59 min
May 23, 6:09 PM EDTSevere Thunderstorm WarningRAHGranville51 min
May 23, 6:10 PM EDTSpecial Weather StatementRAHWake65 min
May 23, 6:21 PM EDTSpecial Weather StatementRAHHoke54 min
May 23, 6:23 PM EDTAreal Flood AdvisoryRAHWake3 hr
May 23, 6:37 PM EDTFlash Flood WarningRAHChatham3 hr
May 23, 6:41 PM EDTSpecial Weather StatementRAHWake64 min
May 23, 6:54 PM EDTSpecial Weather StatementRAHDurham66 min
May 23, 7:12 PM EDTAreal Flood AdvisoryRAHDurham118 min
May 23, 7:12 PM EDTSpecial Weather StatementRAHOrange63 min
May 23, 7:30 PM EDTSpecial Weather StatementRAHChatham45 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2010Every 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.