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May 7, 1998: During the evening, thunderstorms developed over southeast North Carolina. The storms intensified around midnight and quickly became severe producing large hail and a small tornado in the northern sections of Wilmington. The combination of a favorable wind shear profile, unstable air and the approach of a warm front helped the storms to become severe.
March 20, 1998: During the late afternoon, thunderstorms developed over South Carolina. These storms intensified and became severe as they moved northeast into southeast North Carolina during the evening. The combination of a favorable wind shear profile, unstable air and the approach of a cold front contributed to the severity of the storms. Numerous reports of large hail were also received along with a couple of wind damage reports. In addition, these storms contained very heavy rain and Doppler radar estimated the rainfall amounts between 1 and 2.5 inches. Between 8:45 and 9:15 PM, these storms produced large hail and damaging winds across Robeson and western Bladen counties of southeast North Carolina. The largest hail size reported was 1.25 inches at Proctorville in Robeson County.
August 5, 1997: During the late afternoon, several severe storms were moving across portions of southeast North Carolina. The most significant of these turned out to be a storm that first developed over western Columbus County. While most of the storms on this afternoon were moving almost due east, this storm deviated from this pattern and moved to the northeast throughout its life cycle. This northeast movement enabled the storm to maximize the energy available in the atmosphere and turn this energy into damaging winds and hail. The first damage reports came in around 4 pm from the Kelly area of southeast Bladen County where trees were blown down and quarter sized hail fell. The storm then weakened as it moved across the western sections of Pender County before intensifying again near Piney Woods. From here, a damage track five miles wide and 20 miles long occurred through the town of Watha northeast toward the Holly Shelter wildlife refuge. Within in the damage track, hail the size of tennis balls was reported, along with wind speeds estimated well over 60 mph. Six structures were totally destroyed, 20 sustained major damage, 71 others had minor damage and crops were destroyed. The total damage estimate to structures and crops is around $3.5 million.xliii
May 2, 2003: Hail was reported across much of the western half of Henderson County, and was responsible for major damage to the county's apple crop.
May 10, 2005: Mostly pea size hail, with some stones as large as nickels, accumulated to a depth of 2.5 inches in the Carters Ridge area south of Spruce Pine. Hail also accumulated to a depth of several inches in town. Several buildings received minor damage, mainly water damage due to ice dams developing on roofs and in gutters.
Figure 3-22 below shows the probability of hail falling on days of the year from 1980 to 1999.


F
igure 3-19 Annual Probability of Hail in North Carolina

Severe ThunderstormHail Storm Hazard Scores
Figure 3-20 represents the relative location of Severe Thunderstorm—Hail Storm hazard vulnerability across the state of North Carolina. The vulnerability score for each county represents the scope, frequency, intensity, and destructive potential of this hazard and is an indication of future probability based on its relative score to other counties in the state.
F
igure 3-20. Severe Thunderstorm
Hail Storm Hazard Scores by County
Severe Thunderstorm—Torrential Rain
Definition
Torrential rain is any rain that pours down fast, violently, or heavily.
Description
Torrential rain is most common in the summer months when low-latitude, low pressure systems form in the Atlantic Ocean and the Gulf of Mexico. xliv
Historical Occurrences
Between September, 1995 and November, 2011, North Carolina reported 254 heavy rain events resulting in 7 injuries and $9,418,000 in reported property damage. Table 3-9 lists these heavy rain events in chronological orderxlv.
Table 3-9. Detailed Severe Thunderstorm—Torrential Rain History


NORTH CAROLINA SEVERE THUNDERSTORM—TORRENTIAL RAIN EVENTS

#

Location/ County

Date

Time

Magnitude

Deaths

Injuries

Property Damage

Crop Damage

1

Wilmington

9/7/1995

 

 

 

 

$1,000

 

2

Mecklenburg Co

4/30/1996

 

 

 

 

 

 

3

Union Co

4/30/1996

 

 

 

 

 

 

4

Edenton

6/11/1996

 

 

 

 

$75,000

 

5

Highlands

8/17/1996

 

 

 

 

 

 

6

McDowell Co

12/1/1996

 

 

 

 

 

 

7

Mt Sterling

7/1/1997

 

 

 

3

$4,000,000

 

8

Ahoskie, Camden, Currituck, Edenton, Elizabeth City, Gates, Hertford, Jackson, Windsor

1/27/1998

 

 

 

 

 

 

9

Candler, Albemarle, Asheboro, Burlington, Clinton, Durham, Fayetteville, Goldsboro, Greensboro, Halifax, Henderson, Hillsborough, Kernersville, Laurinburg, Lexington, Lillington, Louisburg, Oxford, Raeford, Raleigh, Red Oak, Robbins, Rockingham, Roxboro, Sanford, Siler City, Smithfield, Tarboro, Troy, Wadesboro, Warrenton, Wilson

2/3/1998

 

 

 

 

$20,000

 

10

Ahoskie, Camden, Currituck, Edenton, Elizabeth City, Gates, Hertford, Jackson, Windsor

2/4/1998

 

 

 

 

 

 

11

Aberdeen, Angier, Ansonville, Candor, Chapel Hill, Clayton, Durham, Ellerbe, Elon College, Fayetteville, Franklinton, Gibson, Goldsboro, Nashville, Pittsboro, Raeford, Raleigh, Roseboro, Sanford, Scotland Neck, Seagrove, Tarboro, Warrenton, Wilson

2/16/1998

 

 

 

 

 

 

12

Greenville

7/5/1998

 

 

 

 

$90,000.00

 

13

Morehead City

9/3/1998

 

 

 

 

$25,000.00

 

14

Gatesville, Jackson, Murfreesboro

9/1/1999

 

 

 

 

 

 

15

Henderson, Jackson, Macon, and Transylvania Counties

11/25/1999

 

 

 

 

 

 

16

Fair Bluff

6/3/2000

 

 

 

1

$20,000

 

17

Maiden

7/12/2000

 

 

 

 

$30,000

 

18

Wilmington

9/18/2000

 

 

 

2

$5,000

 

19

Indian Trail

6/16/2001

 

 

 

 

 

 

20

Newland

7/8/2001

 

 

 

 

 

 

21

Lenoir

7/10/2001

 

 

 

 

 

 

22

Arden

8/7/2001

 

 

 

 

$25,000

 

23

Sylva

8/7/2001

 

 

 

 

 

 

24

Marshall, Macon Co, Swain Co

6/4/2002

 

 

 

 

 

 

25

103 Sunshine

7/4/2002

 

 

 

 

 

 

26

Avery, Buncombe, Graham, Haywood, Macon, Madison, and Swain Counties

12/19/2002

 

 

 

 

 

 

27

Spruce Pine

2/22/2003

 

 

 

 

 

 

28

Barnardsville

2/22/2003

 

 

 

 

 

 

29

Cullowhee

4/5/2003

 

 

 

 

 

 

30

Cleveland County

4/6/2003

 

 

 

 

 

 

31

Gaston County

4/6/2003

 

 

 

 

 

 

32

Lincoln County

4/6/2003

 

 

 

 

 

 

33

Shelby

4/10/2003

 

 

 

 

 

 

34

Salisbury

4/26/2003

 

 

 

 

 

 

35

Charlotte Douglas Airport

5/15/2003

 

 

 

 

$20,000

 

36

Hendersonville

6/15/2003

 

 

 

 

 

 

37

White Oak

7/2/2003

 

 

 

 

 

 

38

Lumberton

7/13/2003

 

 

 

 

 

 

39

Bladenboro

7/17/2003

 

 

 

 

 

 

40

Concord

7/18/2003

 

 

 

 

 

 

41

Charlotte

7/19/2003

 

 

 

 

 

 

42

Hickory

7/29/2003

 

 

 

 

 

 

43

Charlotte

7/29/2003

 

 

 

 

 

 

44

Hickory

8/5/2003

 

 

 

 

$50,000

 

45

Gastonia

8/14/2003

 

 

 

 

 

 

46

Tabor City

8/16/2003

 

 

 

 

 

 

47

Fairview

8/16/2003

 

 

 

 

 

 

48

Lake Lure

8/22/2003

 

 

 

 

 

 

49

China Grove

8/31/2003

 

 

 

 

$100,000

 

50

Henderson County

9/22/2003

 

 

 

 

 

 


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