March 1998 Saint Cloud Weather Summary
| This Month's Daily Statistics | 
SUBJECT: From tornadoes to snow(splat) storms, a mild and wet March March 1998 St. Cloud weather summary
 While March 1998 had some wild days, the overall statistics were
 not quite as extreme as the previous month. March continued the mild
 cold season trend, finishing more than 2.5 degrees above normal, but not
 nearly as extreme as the nearly 15 degrees above normal seen in February. 
 Most of the warmth was concentrated in the low temperatures which were almost
 five degrees above normal.
A major change from the pattern in February was the amount of
 precipitation. 2.78 inches of melted precipitation fell in St. Cloud,
 almost double the normal the amount. This ranked as the 9th wettest
 March in Saint Cloud history. While not all of the precipitation fell
 as snow, 10.7 inches of snow did fall, including a total of 5.5 inches
 on March 31 and April 1, the second largest snowfall of this cold season.
 The heavy precipitation also included the first three thunderstorm days of
 the season (on the 26th, 29th, and 31st) and the first reported hail in 
 St. Cloud (on the 29th), although not at the airport.
The radical change from very little precipitation in February to
 double the normal in March continued the alternating pattern seen in
 snowfall during the 1997-98 season. November, January, and March were
 heavy snowfall months, while December and February had little (see chart
 below). The net result is a total snowfall through April 1 of 44.2 inches,
 within an inch of the annual normal snowfall of 45.5 inches.
The wetter March was a result of the frequent merging of the
 two characteristic jet streams covering the US during an El Nino cold
 season. For most of the cold season into February, the northern polar
 jet stream and the southern subtropical jet stream stayed separate.
 Since the subtropical jet stream is closer to the Gulf of Mexico (the
 source of moisture for the US east of the Rockies), most of the moisture
 stayed remained in the southern storm track and well south of Minnesota.
 However, from late February on, especially strong storms have developed
 which have merged the two jet streams together. This has resulted in
 storms tracking northward from Texas through the Central US and storms
 hitting Minnesota having access to Gulf of Mexico moisture. This 
 combination, typical of strong spring storms, helped to produce the
 heavy precipitaion and the access to warm air resulted in the devastating
 tornado outbreak in southern Minnesota on Sunday as well as playing a
 role in the thunderstorms, hail, and wet snow in St. Cloud of the past week.
Two more days of below zero weather were recorded early in March.
 However, that leaves the cold season of 1997-1998 with 16 days of below
 zero lows. If this holds up, it will set the all-time record of fewest
 days with below zero lows.
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MARCH 1998 STATISTICS MAR 1998 NORMAL TEMPERATURE Average High 37.7 37.6 Average Low 22.5 17.6 Average Temp 30.2 27.6 Warmest high temperature 67 on the 26th Coldest high temperature 16 on the 10th Mildest low temperature 45 on the 26th Coldest low temperature -2 on the 11th Daily record temperatures: Record Warm Highs: 67 on the 26th (tied record set in 1905, 1991) Record Warm Lows: 45 on the 26th (tied record set in 1945) MELTED PRECIP (in) 2.78 1.41 Most in 24 hours 1.03 on the 31st SNOWFALL (in) 10.7 9.8 Most in 24 hours 4.6 on the 31st Seasonal Snowfall (Oct-Mar) 43.4 43.1
     ST. CLOUD PRECIP--MARCH     (108 YEARS; AVG =  1.31 IN; SDEV =  0.86 IN)
	      WETTEST                           DRIEST
      4.53 IN  1897                      0.01 IN  1989
      3.43 IN  1965                      0.10 IN  1959
      3.14 IN  1920                      0.14 IN  1887
      3.09 IN  1990                      0.14 IN  1909
      3.05 IN  1896                      0.18 IN  1910
      3.03 IN  1977                      0.20 IN  1923
      3.02 IN  1979                      0.24 IN  1895
      2.98 IN  1917                      0.27 IN  1939
      2.78 IN  1998 <--9TH WETTEST       0.28 IN  1912
      2.75 IN  1903                      0.31 IN  1971
		 ST. CLOUD SNOWFALL(IN)
	     OCT  NOV  DEC  JAN  FEB  MAR  APR  MAY  TOTAL
1997-1998    0.3 11.0  4.0 16.8  0.6 10.7             43.4
NORMAL       0.5  6.8  8.9 10.1  7.0  9.8  2.3  0.1   45.5
     ST. CLOUD TEMPS--FEWEST LOW TEMPERATURES OF 0 DEG OR LOWER
       
			COLD SEASON
	      16  1997-1998 <--- FEWEST EVER
	      17  1986-1987     
	      22  1918-1919
	      22  1941-1942
	      29  1908-1909
	      29  1990-1991
	      30  1931-1932
	      30  1982-1983
	      31  1937-1938
	      31  1943-1944
	      31  1957-1958
 
 
Send comments to: raweisman@stcloudstate.edu