Alert archive / North Carolina / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 154, NWS Raleigh, NC

July 1, 2009Johnston County, Wake County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Jul 1, 2009, 11:43 PM EDT for Johnston County, Wake County, North Carolina. It was in force for 37 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: Jul 1, 2009, 11:43 PM EDT (03:43 UTC)
Expired: Jul 2, 2009, 12:20 AM EDT
In force: 37 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon

Counties Johnston County, NC, Wake County, NC

The radar

The Raleigh/Durham radar (KRAX), 2 km from the middle of the area, began a volume at 03:42 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

Newport, NC (KMHX), launched 00:00Z, 3.7 hours before the alert went out and 177 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: 366 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 1857 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 163 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 7.2

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 Jul 1, 10:12 PM EDT, 1 hour 31 minutes earlier.

Area forecast discussion, Jul 1, 10:12 PM EDT, 1 hour 31 minutes before

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Hazardous weather outlook, Jul 1, 4:59 PM EDT, 6 hours 44 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RALEIGH NC
458 AM EDT WED JUL 1 2009

NCZ007>011-021>028-038>043-073>078-083>086-088-089-021000-
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-
458 PM EDT WED JUL 1 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NORTH CAROLINA.

.DAY ONE...THIS EVENING...

WIDELY SCATTERED THUNDERSTORMS ARE EXPECTED THROUGH LATE EVENING.
ONE OR TWO OF THESE STORMS MAY BECOME STRONG TO POSSIBLY SEVERE...
WITH DAMAGING WIND GUSTS THE MAIN THREAT.

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

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

BADGETT

In the hours before

Local storm report, Jul 1, 9:50 PM EDT, 1 hour 53 minutes before

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Local storm report, Jul 1, 9:53 PM EDT, 1 hour 50 minutes before

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Local storm report, Jul 1, 9:55 PM EDT, 1 hour 48 minutes before

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Local storm report, Jul 1, 9:58 PM EDT, 1 hour 45 minutes before

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Local storm report, Jul 1, 10:03 PM EDT, 1 hour 40 minutes before

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Special weather statement, Jul 1, 10:47 PM EDT, 56 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
Jul 1, 8:02 PM EDT	Severe Thunderstorm Warning	RAH	Edgecombe, Wilson	43 min
Jul 1, 8:10 PM EDT	Severe Thunderstorm Warning	RAH	Cumberland	50 min
Jul 1, 8:30 PM EDT	Severe Thunderstorm Warning	RAH	Cumberland, Harnett, Johnston, Sampson, Wayne	45 min
Jul 1, 9:15 PM EDT	Severe Thunderstorm Warning	RAH	Sampson	45 min
Jul 1, 11:10 PM EDT	Severe Thunderstorm Warning	RAH	Franklin, Wake	50 min
Jul 2, 12:02 AM EDT	Severe Thunderstorm Warning	RAH	Franklin, Johnston, Nash, Wake	43 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.