March 2009 Climatic Summary

March temperatures were on the cool side, averaging 1 to3 degrees below normal region wide. The coolest temperatures were in central and northwest South Dakota where temperatures averaged 5 to 7 degrees below normal. The warmest areas were across northeast Wyoming, the Black Hills and southwest South Dakota where temperatures averaged 1 to 2 degrees above normal. Deadwood 2NE was the warm spot averaging 2.4 degrees above normal. The cold spot was at Maurine 12SW where temperatures averaged 7.7 degrees below normal.
March was a wet month with precipitation averaging 190 to 210 percent of normal. The wettest areas were across northwest South Dakota and across Crook County in northeast Wyoming where precipitation averaged 300 to 400 percent of normal. The driest areas were across southern Campbell and Weston counties in northeast Wyoming and over south central South Dakota where precipitation was 80 to 100 percent of normal. The wet spot was at Ladner 9SW, where precipitation was 492 percent of normal. Winner was the dry spot with just 25 percent of normal precipitation. The precipitation surplus for the month averaged 1.00 inches.

Snowfall was exceptional in March averaging 200 to 250 percent above normal. Snowfall averaged 60 to 84 inches across the northern Black Hills and Bear Lodge mountains. The northeast Wyoming plains averaged 10 to 20 inches. Across the northwestern South Dakota plains snowfall averaged 20 to 40 inches, with 10 to 20 inches elsewhere on the plains of western South Dakota and in the southern and central Black Hills.

March storm summary...

On March 9 and 10…an upper level storm system brought 8 to 14inches of snow to the northern Black Hills with 5 to 10 inches in the northern foothills. Across the plains of central and northwest South Dakota 3 to 6 inches of snow fell, with 1 to 3 inches over southwest and south central South Dakota. In northeast Wyoming 6 to 12 inches of snow fell.

On March 23 and 24…a powerful blizzard struck western South Dakota and northeast Wyoming bringing heavy snows and strong winds. Snowfall averaged 30 to 40 inches over the northern Black Hills with 15 to 25 inches in the northern foothills. Southwest and south central South Dakota saw 5 to 10 inches of snow with 10 to 20 inches elsewhere on the plains of western South Dakota. In northeastern Wyoming 12 to 18 inches of snow fell over northern Campbell and Crook counties with 6 to 12 inches over Weston County and in southern Campbell and Crook counties. Winds of 40 to 50 mph with gust to 60 mph were common. The strongest wind gust occurred 7 miles southeast of Bison in Perkins County where winds gusted to 90 mph. A wind gust of 80 mph was reported at the Weather Service Office in Rapid City.

On March 29 through 31…another powerful blizzard struck western South Dakota and northeast Wyoming bringing heavy snows and strong winds. Snowfall averaged 25 to 35 inches over the northern Black Hills, and 15 to 25 inches across the northern foothills. Southwest and south central South Dakota saw 4 to 8 inches of snow with 8 to 16 inches elsewhere on the plains of western South Dakota. In northeast Wyoming 6 to 12 inches fell over Crook and northern Campbell counties, with 3 to 6 in Weston County and southern Campbell County. Winds of 25 to 35 mph with gusts to 45 mph were reported across the region.

LOCAL EXTREMES

Temperature Data

Rapid City

 

Lead

 

Gillette

 

 

Temperature

Date

Temperature

Date

Temperature 

Date

Maximum Temperature

77 degrees

22nd

69 degrees

21st

72 degrees

21st

Minimum Temperature

-12 degrees

10th, 11th

-7 degrees

11th

-16 degrees

11th

Precipitation Data

Rapid City

 

Lead

 

Gillette

 

Monthly Data

Amount

Data

Amount

Date

Amount

Date

Precipitation

2.07 inches

 

5.12 inches

 

1.84 inches

 

Snowfall

26.8 inches

 

90.0 inches

 

24.5 inches

 

 

 

 

 

 

 

 

Daily Data

 

 

 

 

 

 

Maximum Precipitation

0.83 inches

24th

2.01 inches

24th

0.91 inches

23rd

Maximum Snowfall

12.0 inches

30th

30.2 inches

24th

12.0 inches

23rd

 REGIONAL EXTREMES

Temperature Data

 

Western South Dakota

 

 

Northeastern Wyoming

 

 

Temperature

Site

Date

Temperature

Site

Date

Maximum Temperature

82 degrees

Wasta

23rd

75 degrees

Hulett

22nd

Minimum Temperature

-19 degrees

Maurine 12SW

11th

-24 degrees

Dillinger

11th

Precipitation Data

 

Western South Dakota

 

 

Northeastern Wyoming

 

Monthly Data

Amount

Site

Date

Amount

Site

Date

Maximum Precipitation

6.26 inches

Deadwood 2NE

 

3.60 inches

Hulett

 

Minimum Precipitation

0.43 inches

Winner

 

0.63 inches

Upton

 

Maximum Snowfall

90.0 inches

Lead

 

41.5 inches

Hulett

 

Minimum Snowfall

2.0 inches

Winner

 

8.0 inches

Newcastle

 

 

 

 

 

 

 

 

Daily Data

 

 

 

 

 

 

Maximum Precipitation

2.80 inches

Ardmore 2N

23rd

2.54 inches

Hulett

24th

Maximum Snowfall

30.2 inches

Lead

24th

23.0 inches

Hulett

24th

MONTHLY RECORDS

LOCATION

DATE

NEW RECORD

OLD RECORD

DATE

Bison

03/24/2009

10.0 inches snowfall

9.5 inches snowfall

03/29/1977

Camp Crook

03/30/2009

16.0 inches snowfall

16.0 inches snowfall

03/21/1946

Camp Crook

March

51.0 inches snowfall

27.8 inches snowfall

1898

Devils Tower

03/26/2009

2.26 inches rainfall

1.12 inches rainfall

03/14/1973

Devils Tower

03/26/2009

20.0 inches snowfall

13.0 inches snowfall

03/21/1987

Devils Tower

March

3.17 inches rainfall

2.39 inches rainfall

2007

Devils Tower

March

32.8 inches snowfall

19.5 inches snowfall

1987

Maurine 12SW

3/24/2009

2.35 inches rainfall

2.02 inches rainfall

3/31/2000

Maurine 12SW

March

35.0 inches snowfall

27.0 inches snowfall

1998

Newell

3/25/2009

13.0 inches snowfall

12.0 inches snowfall

3/29/1977

Spearfish

March

52.0 inches snowfall

50.2 inches snowfall

1977

Redig 11NE

3/24/2009

12.0 inches snowfall

12.0 inches snowfall

3/11/88, 3/29/71

Redig 11NE

March

36.0 inches snowfall

33.5 inches snowfall

1950

 
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