May 15, 1998 Minnesota storms

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The May 15, 1998 Minnesota storms were several instances of severe thunderstorms that impacted much of Minnesota on May 15, 1998. A combination of tornadoes, downbursts and large hail combined to cause $1.5 billion dollars (1998 USD) in damage across the state.[1]

Contents

[edit] Meteorological synopsis

Early on May 15, 1998, a stationary front was positioned from the western border of Minnesota, southward to Kansas.[2] To the east of the stationary front, temperatures and dew points were unseasonably high. Several Minnesota cities reported record high dew points (including the Twin Cities of 70 °F (21 °C)) and low–minimum temperates for May 15.[3] A deepening area of low pressure over Kansas ejected to the north, moving along the stationary front. Behind the low pressure area was much cooler and drier air.[2] The clash of these two differing air masses was the impetus for the development of the severe weather.

A squall line moving at speeds to 70 miles per hour (113 km/h) with embedded supercells entered Minnesota from the southwest during the early afternoon hours, and raced northward across most of the state.[4] The primary threat from these storm was large hail, which was enhanced by the strong downburst winds. In addition to the hail and high winds, five tornadoes also touched down with the supercells, killing one person.

[edit] Tornadoes

Five F1 tornadoes touched down in southern Minnesota between 2:10 pm – 4:00 pm CDT. Two of these tornadoes caused major damage, both touching down at 3:40 pm in different parts of the state. One of the tornadoes touched down in the town of Albany. It killed one person and injured 30 others when it hit a flea market. The other tornado touched down in the northern suburbs of the Twin Cities metropolitan area. The tornado touched down in Roseville, and then traveled 12 miles through Shoreview, North Oaks and Lino Lakes before lifting back up into the clouds in Blaine. Seven houses were destroyed and several hundred more were damaged.

[edit] List of tornadoes

Confirmed
Total		 Confirmed
F0		 Confirmed
F1		 Confirmed
F2		 Confirmed
F3		 Confirmed
F4		 Confirmed
F5
5 0 5 0 0 0 0
List of tornadoes - Thursday, May 15, 1998
F#
Location
County
Time (UTC)
Path length
Damage
Minnesota
F1 Blue Earth area Faribault 1910 0 miles Minor roof damage.[5]
F1 Silver Lake area McLeod 2010 0 miles Six farm buildings destroyed, one home damaged. $500k in damage reported.[6]
F1 Albany Stearns 2040 9 miles
(14 km)		 1 death – One man was killed and 30 injured. Several vehicles and one farm damaged. All total $3 million in damages.[7]
F1 Roseville area Anoka, Washington 2040 12 miles
(19.2 km)		 Seven houses destroyed, 102 severely damaged in several northern suburban communities. Tornado and hail damage in this area $151 million.[8][9]
F1 Eyota area Olmsted 2100 8 mi
(13 km)		 $50k in damage to several farms.[10]

[edit] Aftermath

On June 23, 1998, 19 counties in central and southern Minnesota were declared Federal disaster areas for the wind and hail damage. Damage from this event was estimated at over $1 billion. Debris cleanup alone cost $18 million, the largest debris removal project in Minnesota's history.[11]

Two weeks after this event, another large storm blew through the area, hitting the southern Twin Cities metropolitan area hard. This event caused an additional $200 million in damage across the state.

[edit] See also

[edit] References

  1. ^ Minnesota Severe Storms/Hail May 1998. Billion dollar U.S. weather disasters. National Climatic Data Center (NCDC) (January 31, 2008). Retrieved on 2008-05-30.
  2. ^ a b Daily Weather Maps (djvu). NOAA (May 15, 1998). Retrieved on 2008-05-30.
  3. ^ Seeley, Mark (May 19, 1998). Record Warmth - May 15, 1998. Minnesota Climatology Office. Retrieved on 2008-05-30.
  4. ^ Woelm, Scott (June 30, 2006). Top 10 Minnesota Severe Weather Events 990-1999. Metro Skywarn. Retrieved on 2008-05-30.
  5. ^ Event Record Details – Blue Earth tornado. Storm Event Database. NCDC (May 15, 1998). Retrieved on 2008-05-30.
  6. ^ Event Record Details – Silver Lake tornado. Storm Event Database. NCDC (May 15, 1998). Retrieved on 2008-05-30.
  7. ^ Event Record Details – Albany tornado. Storm Event Database. NCDC (May 15, 1998). Retrieved on 2008-05-30.
  8. ^ Event Record Details - Roseville tornado. Storm Event Database. NCDC (May 15, 1998). Retrieved on 2008-05-30.
  9. ^ Event Record Details - Lino Lakes tornado. Storm Event Database. NCDC (May 15, 1998). Retrieved on 2008-05-30.
  10. ^ Event Record Details - Eyota tornado. Storm Event Database. NCDC (May 15, 1998). Retrieved on 2008-05-30.
  11. ^ FEMA-1225-DR-MN (1998). FEMA (June 23, 1998). Retrieved on 2008-05-30.