FROM: Bob Weisman, Earth Sciences
DATE: 2 April 1999
SUBJECT: March continues mild and dry trend
March 1999 St. Cloud weather summary
March 1999 in St. Cloud continued the trend of mild and dry months.
The average temperature of 31.7 degrees was more than 4 degrees above normal.
This figure made March 1999 the mildest March since 1990. While no record
highs were set, the 71 degree high on March 30 was the first 70+ degree
high reached since 1987, when the highs on both March 6 and 7 broke the
70 degree mark (71 on the 6th, 73 on the 7th--both daily record temperatures).
The low temperature of 49 degrees on March 31, 1999 did set a daily record
for a mild low temperature. Also, there were no sub-zero lows set in March
1999, so the 1998-1999 cold season continues to be tied for the 5th lowest
number of days with a low of 0 or colder (see table below).
Precipitation continued to be sparse in St. Cloud. The March 1999
melted total of 0.94 inch was almost half an inch below normal. There were
only 5 days with measurable precipitation in March 1999, making only 7 days
with measurable precipitation since February 1. This has put the annual
precipitation deficit for 1999 at nearly an inch. More importantly, ground
water levels are in need of a recharge since the fall 1998 rainfall was
more than 1.5 inches below normal (Sept-Nov rainfall: 4.67 in; Sept-Nov
normal rainfall: 6.29 in). Most of the snowfall does not recharge the soil
since the ground is frozen, so the spring rainfall now is very important.
Hopefully, some thunderstorms over the next 24 hours will help to ease
this situation.
Most of the precipitation during March 1999 in St. Cloud was locked
up in snowfall, and the bulk of that fell during the storm of March 8-9. This
storm produced 9.8 inches of snow in St. Cloud, set a daily snowfall record
for March 8, and was the biggest March snowfall in 14 years. Other records
fell statewide, including the largest Twin Cities snowfall since the Halloween
blizzard. Many more details about this storm appear below. The total St. Cloud
March snowfall was 10.5 inches, less than an inch above normal. The
1998-1999 seasonal snowfall now has reached 35.6 inches. If this total
holds through April and May, it will be the lowest St. Cloud seasonal snowfall
in 9 years. The seasonal snowfall for 1989-1990 was 32.5 inches.
===========================================================================
MARCH 1999 STATISTICS MAR 1999 NORMAL
TEMPERATURE
Average High 42.2 37.6
Average Low 21.1 17.6
Average Temp 31.7 27.6
Warmest high temperature 71 on the 30th
Coldest high temperature 28 on the 4th,6th,8th
Mildest low temperature 49 on the 31st (record, see below)
Coldest low temperature 2 on the 12th
Daily record temperatures:
Record Warm Lows: 49 on the 31st (old record: 44 in 1918)
MELTED PRECIP (in) .94 1.41
Most in 24 hours .48 on the 8th
SNOWFALL (in) 10.5 9.8
Most in 24 hours 7.5 on the 8th (record; see below)
Seasonal Snowfall (Oct-Mar) 35.6 43.1
Daily record snowfall: 7.5 on the 8th (old record: 2.8 in in 1982)
ST. CLOUD SNOWFALL(IN)
OCT NOV DEC JAN FEB MAR APR MAY TOTAL
1998-1999 0.0 3.4 2.8 18.4 0.5 10.5 35.6
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
17 1986-1987
22 1918-1919
22 1941-1942
29 1908-1909
29 1990-1991
29 1998-1999 <--- TIED FOR 5TH FEWEST ON RECORD
30 1931-1932
30 1982-1983
31 1937-1938
31 1943-1944
31 1957-1958
SNOWSTORM OF MARCH 8-9, 1999
The March 8-9 snowfall was the largest March snowfall in 14 years. The
total snowfall was 9.8 inches at the St. Cloud Airport.
There hasn't been a storm producing this much snowfall in St. Cloud
during the past 26 months. The last major snowfall this large in central
Minnesota was January 4-5, 1997, which produced 11.6 inches in St. Cloud
with even higher totals to the west (for example: 27 inches in Wheaton,
21 inches in Alexandria). The last time there was this much snow in March
was in 1985 when the storm of March 3-4 produced more than 17 inches of
snow in St. Cloud.
This particular storm, which dumped snow from Nebraska to Indiana
and is doing it right now in the Mid-Atlantic states, was unusual in that
the track of the storm (eastern Colorado to southern Missouri) was a good
one for producing heavy snow in Iowa, but usually doesn't produce a lot
of snow further to the north. However, this system also contained an
inverted trough, a subject of currently funded National Science Foundation
research at St. Cloud State University. Weisman, three current and former
SCSU students, and colleagues from the regional National Weather Service offices
have been studying this forecast problem for the past two years. A workshop on
the findings was held last November in Sioux Falls, leading to improved
techniques in the forecasting of such systems. While this particular storm
did not quite fit the mold, the forecasts in the area were relatively close,
showing that these techniques are, at least, a partial success.
RECORDS BROKEN BY MARCH 8-9, 1999 SNOWSTORM
===========================================
St. Cloud:
Most snowfall on March 8: 7.5 inches (old record: 2.8 inches in 1982)
Highest single day snowfall since January 4, 1997 (8.5 inches)
Largest storm total snowfall (9.8 inches) since January 4-5, 1997
(11.6 inches)
Largest March single day snowfall and storm total snowfall since
March 3-4, 1985 (8.7 inches on 3/3/85; 9.0 inches on 3/4/85)
Minneapolis/St. Paul Int'l: largest single storm snowfall since the
Halloween blizzard (10/31-11/2/1991)
Most snowfall on March 8: 12.5 inches
Most melted precipitation on March 8: 0.95 inches melted
Other accumulations:
Bloomington: 16-17 inches
Minneapolis/St. Paul Int'l: 16 inches
Forest Lake: 15 inches
Fridley, Golden Valley, New Prague, Spring Lake Park,
Waconia, SW Minneapolis: 14 inches
Chanhassen, North Branch, Savage: 13 inches
Stillwater: 12.5 inches
Henderson: 12-14 inches
Princeton: 12 inches
Elk River: 12 inches
Chicago, IL: 12 inches
Cokato: 11.2 inches
Lafayette, St. Peter, Wabasha, Zimmerman: 11 inches
Des Moines, IA: 11 inches
Mason City, IA: 11 inches
Ottumwa, IA: 11 inches
Hutchinson: 10-12 inches
Brainerd, Buffalo, Cambridge, Foley, New Ulm, Rice, Waseca: 10 inches
Granite Falls: 10 inches
St. Cloud Airport: 9.8 inches
Albert Lea: 9.5 inches
Eden Valley, Faribault, Red Wing, Willmar: 9 inches
Lamberton, New London: 9 inches
St. Cloud State University: 9.5 inches
Sioux Falls, SD: 9.3 inches
Mankato: 8-10 inches
Fairmont: 8-9 inches
Blue Earth: 8.5 inches
Little Falls, Long Prairie, Melrose, Montevideo, Stewart, Vesta: 8 inches
Redwood Falls: 7 inches
Alexandria: 6-8 inches
Glenwood, Onamia: 6 inches
Moline, IL: 6 inches
International Falls: 5 inches
Milwaukee, WI: 5 inches
Madison, WI: 5 inches
=============================================================================
Bob Weisman, Meteorology Professor SUPERVISOR: Shirley (age 7)
Earth Sciences Department PHONE: (320) 255-3247 (V)
MS 48 (800) 627-3529 (TTY via
Saint Cloud State University Minnesota Relay Service)
720 4th Avenue South FAX: (320) 255-4262
Saint Cloud, Minnesota 56301-4498 EMAIL: scsweisman@tigger.
stcloudstate.edu
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