Alert archive / North Carolina / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 158, NWS Raleigh, NC
NWS Raleigh, NC issued this severe thunderstorm warning at Jul 12, 2009, 7:23 PM EDT for Durham County, Orange County, Person County, North Carolina. It was in force for 28 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 12, 2009, 7:23 PM EDT (23:23 UTC)
- Expired
- Jul 12, 2009, 7:51 PM EDT
- In force
- 28 min
- Issued by
- NWS Raleigh, NC
- Area
- Storm-based polygon
Counties Durham County, NC, Orange County, NC, Person County, NC
The radar
The Raleigh/Durham radar (KRAX), 71 km from the middle of the area, began a volume at 23:24 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 124 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.
- Mixed-layer CAPE
- 441 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 631 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 128 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.7
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 12, 6:00 PM EDT, 1 hour 23 minutes earlier.
Area forecast discussion, Jul 12, 6:00 PM EDT, 1 hour 23 minutes before
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</html>Hazardous weather outlook, Jul 12, 6:15 PM EDT, 1 hour 8 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RALEIGH NC 615 PM EDT SUN JUL 12 2009 NCZ007>011-021>028-038>043-073>078-083>086-088-089-130930- 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- 135 PM EDT SUN JUL 12 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NORTH CAROLINA. .DAY ONE...THIS EVENING AND TONIGHT. SCATTERED THUNDERSTORMS ARE EXPECTED MAINLY OVER THE WESTERN AND NORTHERN SECTIONS OF CENTRAL NORTH CAROLINA THIS EVENING... AND ACROSS THE REGION OVERNIGHT. AN UPPER LEVEL DISTURBANCE WILL APPROACH FROM THE WEST... AS A WEAK COLD FRONT DRIFTS INTO THE REGION. ISOLATED SEVERE THUNDERSTORMS WILL BE POSSIBLE MAINLY OVER THE PIEDMONT TRIAD REGION EAST ALONG AND NORTH OF INTERSTATE 85 THIS EVENING. THE PRIMARY THREAT WITH THESE STORMS WILL BE DAMAGING WIND GUSTS TO NEAR 60 MPH... AND LARGE HAIL TO THE SIZE OF PENNIES OR NICKELS. THE THREAT WILL DIMINISH WITH THE LOSS OF DAYTIME HEATING THIS EVENING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE MONDAY... ESPECIALLY MONDAY AFTERNOON AND EVENING OVER THE SOUTHERN PIEDMONT... SANDHILLS... AND SOUTHERN COASTAL PLAIN... FROM WADESBORO AND ALBEMARLE EAST TO FAYETTEVILLE... LAURINBURG... AND GOLDSBORO. LOCALLY HEAVY RAINFALL COULD RESULT IN FLOODING OF LOW-LYING AND POOR DRAINAGE AREAS ON MONDAY INTO MONDAY NIGHT IN THESE AREAS. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTERS ARE ENCOURAGED TO REPORT ANY SEVERE OR SIGNIFICANT TO THE NATIONAL WEATHER SERVICE. BADGETT
The office that day
Everything else NWS Raleigh, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 6:36 PM EDT | Severe Thunderstorm Warning | RAH | Person | 39 min |
Nearby
Severe Thunderstorm Warnings in North Carolina, 2009Every 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.