North carolina climate
Download
1 / 41

North Carolina Climate - PowerPoint PPT Presentation


  • 145 Views
  • Uploaded on

North Carolina Climate. NOAA/National Weather Service Raleigh, NC. June 18, 2009 Phillip Badgett – NOAA/NWS Raleigh, NC. [email protected] National Weather Service. North Carolina Topographic Map. National Weather Service. North Carolina’s Unique Topography and Geography.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'North Carolina Climate' - ostinmannual


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
North carolina climate
North Carolina Climate

NOAA/National Weather Service Raleigh, NC

June 18, 2009

Phillip Badgett – NOAA/NWS Raleigh, NC

[email protected]

National Weather Service


North Carolina Topographic Map

National Weather Service


North Carolina’s Unique Topography and Geography

  • The Appalachian Mountains… the proximity to the Gulf Coast and the Atlantic Ocean… and Gulf Stream… all have a profound affect on North Carolina’s Climate.

  • Elevations range from sea level to 6684 feet at Mt. Mitchell.

  • Geographic regions include the Mountains… Foothills… Piedmont… Sandhills… Coastal Plain… Coastal Area… and Outer Banks.

National Weather Service


Factors that Influence North Carolina’s Climate

  • Mountains and moisture sources (Gulf and Atlantic) play major roles in Cold Air Damming (CAD) and Thermal Moisture Boundary (TMB) formation… and resultant severe weather and winter weather climatology.

  • Tornado outbreaks are often tied to location of TMB. (March 1984, November 1988, November 2008 just a few examples).

  • Mountains can disrupt or weaken tornado outbreaks in Tennessee Valley from affecting our Piedmont (April 3-4, 1974 event).

  • Mesoscale Convective System (MCS) crossing mountains (often break up crossing the mountains… but can re-intensify east of mountains. (RNK study).

  • CAD results when cold stable air arriving from the northeast is dammed up along the mountains.

National Weather Service


Factors that Influence North Carolina’s Climate

  • CAD (profound affect on North Carolina’s Climate often enhancing winter storms… severe weather near TMB along CAD periphery to the east and south… and enhancing or reducing QPF.

National Weather Service




Cold Air Damming

National Weather Service




North Carolina’s Annual Precipitation

National Weather Service


North Carolina’s Annual Precipitation

  • Wettest weather station in North Carolina…

    • 91.72 Inches (Annual Average)… Lake Toxaway, Transylvania County

  • Driest weather station in North Carolina…

    • 37.32 Inches… Asheville (downtown), Buncombe County

National Weather Service


North Carolina’s Annual Precipitation

  • Wettest calendar year for any station…

    • 129.60 Inches (1924), Rosman, Transylvania County

  • Driest calendar year for any station…

    • 22.69 Inches (1930), Mount Airy, Surry County

National Weather Service


North Carolina’s Precipitation Influences

  • Primary storm tracks, CAD, and TMB/Coastal Fronts (cool season).

  • Tropical cyclone tracks and low level boundaries (warm season).

  • Piedmont trough position (enhances summer pulse storms and resultant QPF and pulse severe). (Reference Tony Ray study).

  • Sandhills enhanced summer rainfall due to differential heating of sandy soil versus other soil types surrounding the region. (SCO study).

National Weather Service


North Carolina’s Annual Temperature

National Weather Service


North Carolina’s Annual Temperature

  • Warmest weather station in North Carolina…

    • 63.8 degrees… Wilmington, New Hanover County

  • Coldest weather station in North Carolina (where people actually live)…

    • 48.8 degrees… Banner Elk, Avery County. 43.8 degrees… Mount Mitchell, Yancey County

National Weather Service


North Carolina’s Annual Temperature

  • Lowest temperature on record was 34 below at Mount Mitchell (January 21, 1985).

    • Raleigh was 9 degrees below zero on that same date for lowest all time in the Raleigh area.

  • Highest temperature on record was 110 degrees at Fayetteville (August 21, 1983)

    • Raleigh was 101 degrees that same day.

National Weather Service


Winter Weather Climatology

  • Winter weather season typically runs between December and March.

  • Predominate snow events are most common over the northwest… with least occurrences along the coast.

  • Freezing rain is most often predominate over the Northern Piedmont Damming Region (due to CAD).

  • Sleet is rarely the predominate winter storm precipitation type (it is typically found with transition zones of precipitation).

National Weather Service



North Carolina’s Number of Days with Snow and Sleet Accumulation

National Weather Service


North Carolina’s Number of Events per Year with Sleet and Freezing Rain

National Weather Service


A Typical Strong Winter Storm with Cold Air Damming Freezing Rain

National Weather Service


Severe Weather Climatology Freezing Rain

  • Three Distinctive Severe Weather Seasons

    • Primary (late February through May)

    • Pulse Severe (June through August)

    • Secondary (October and November)

National Weather Service


Tornado Track (EF3 and Greater Since 1950) Freezing Rain

National Weather Service


Monthly Distribution of Tornadoes for the Raleigh CWA Freezing Rain

National Weather Service


Monthly Distribution of Severe Thunderstorm Wind Events for the Raleigh CWA

National Weather Service



Monthly Distribution of Severe Thunderstorm Hail Events for the Raleigh CWA

National Weather Service



Flash Flood Climatology Raleigh CWA

National Weather Service


River Flood Climatology Raleigh CWA

National Weather Service


All Hurricanes Affecting North Carolina 1851-2008 Raleigh CWA

National Weather Service


June Hurricanes Affecting North Carolina 1851-2008 Raleigh CWA

National Weather Service


July Hurricanes Affecting North Carolina 1851-2008 Raleigh CWA

National Weather Service


August Hurricanes Affecting North Carolina 1851-2008 Raleigh CWA

National Weather Service


September Hurricanes Affecting North Carolina 1851-2008 Raleigh CWA

National Weather Service


October Hurricanes Affecting North Carolina 1851-2008 Raleigh CWA

National Weather Service


November Hurricanes Affecting North Carolina 1851-2008 Raleigh CWA

National Weather Service




Credits (1950 through 2008)

  • North Carolina State Climate Office

  • Southeastern River Forecast Center

  • National Climatic Data Center

  • Brandon Dunstan

  • Jonathan Blaes, Darin Figurskey, Ryan Ellis, Brandon Locklear, Mike Moneypenny, Barrett Smith - (NWS RAH).

National Weather Service


ad