The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| Event typeevent_type | Heavy Rain |
|---|---|
| NOAA NCEI event IDncei_event_id | 659,470 |
| Episode IDepisode_id | 108,830 |
| Begin UTCbegin_utc | 2016-09-21T21:00:00+00:00 |
| End UTCend_utc | 2016-09-22T12:00:00+00:00 |
| Statestate | MINNESOTA |
| County/zone typecz_type | C |
| County/zone namecz_name | HENNEPIN |
| Latitudelat | 45.090 |
| Longitudelon | -93.470 |
| End latitudeend_lat | 45.090 |
| End longitudeend_lon | -93.470 |
| Deaths directdeaths_direct | 0 |
| Deaths indirectdeaths_indirect | 0 |
| Injuries directinjuries_direct | 0 |
| Injuries indirectinjuries_indirect | 0 |
| Damage propertydamage_property | 0.00K |
| Damage cropsdamage_crops | 0.00K |
| Weather forecast office sourcewfo_source | Mesonet |
| Episode narrativeepisode_narrative | On the evening of September 20th, a warm front was stretched west to east across southern Minnesota originating from a developing low pressure system across the South Dakota and Nebraska border. The weather pattern, and associated boundaries were nearly stationary through early Thursday morning, September 22nd. The atmosphere was very moist, which was evident in the soundings as near record high Precipitable Water (PWAT) values were noted. ||Although the most significant part of this weather event was flooding, some large hail was observed the evening of September 20th, and during the afternoon and evening of Wednesday, September 21st. ||The evening of Tuesday, September 20th, an area of thunderstorms formed along and north of the warm front in southern Minnesota. Heavy rain fell in south central Minnesota, especially near Waseca. A Flash Flood Warning was issued for portions of southern Minnesota but no major issues were reported. Ultimately, 2 to 3 inches of rain fell in a rather short period of time near Janesville and Waseca late Tuesday night. This rainfall event, although localized, created very wet antecedent conditions before the main heavy rainfall event developed the evening of Wednesday, September 21st.||The evening and overnight of September 21st-22nd saw much more and widespread heavy rainfall across southern Minnesota. Two areas that were hit the hardest occurred across Hennepin and Anoka counties, in the Twin Cities metro area, and around Mankato, Waseca and Owatonna. ||The worst and most significant flash flood event occurred between Greenfield, Corcoran in Hennepin County, eastward to Spring Lake Park, Fridley, Lexington and Lino Lakes in Anoka County. The first heavy rainfall event occurred between 5 PM and 8 PM CST. This event produced between 3 and 6 inches of rainfall in less than 3 hours, with some areas receiving 3 to 4 inches of rain in less than 90 minutes based on local observations. The second event produced an additional 2 to 4 inches after 9 PM CST in the same areas which prompted a small region to have a Flash Flood Emergency issued. Upwards of 7, to nearly 10 inches of rain fell before midnight. Due to this extreme event, there were hundreds of abandoned cars with water reaching the car windows in northwest metro suburbs during the height of the storm. Interstate 94 in the north metro was closed for a period that night. Five private residents had 3-4 feet of water in their basements, and two homes had water completed filled to the top in Maple Grove. In addition to the homes, there were 15 county roads closed at one point around Maple Grove and Brooklyn Park based on reports from the Hennepin County Emergency Management. A small part of Highway 169 near the border of Maple Grove and Brooklyn Park was closed for 4 days due to the runoff from earlier torrential rainfall. ||The other flash flood event occurred near Mankato (northeast Blue Earth County) eastward through Waseca and Steele Counties. Thunderstorms that developed Wednesday evening were much more widespread, and trained over the same areas along and north of the front. Rainfall amounts ranged from 4 to 6 inches from Mankato, to Albert Lea, Kenyon and Faribault. The highest 24-hour total ending on the morning of September 22 was 7.64 inches at the U of M Southern Research and Outreach Center in Waseca. This brought the two-day total at that location to 10.16 inches, including the 2.52 inches of rain that fell with the first wave on September 20-21. This is the highest two-day total ever recorded in Waseca.||Due to the ground that was already saturated from earlier torrential rainfall the day before, the flooding situation became extreme, with ongoing areal flooding lasting for the next several days as the runoff continued. ||There were many reports of basements flooded, closed roads and washouts, and standing water in Waseca and other locations as well. There were a few homes in Waseca that were evacuated due to the flood waters. The indoor ice arena in Waseca had six inches of water on the freshly-iced rink. Loon Lake in Waseca rose over its banks and flooded nearby streets in town. The rising waters of Fountain Lake in Albert Lea encroached into town during the day on September 23, detouring Highway 65 (Main Street) near the lake.||According to the emergency manager at least 75 percent of the homes in the Waseca area were damaged by flooding. A line nearly 200 yards long of trucks and cars filled with wet carpets, furniture and waterlogged TVs and appliances was lined up at the City of Waseca debris dump site. ||There was major flooding on rivers and creeks across portions of southern Minnesota that lasted for several days beyond the event. The North Fork Zumbro River near Wanamingo reached a record flood stage of 23.38 feet during the morning of 9/22. The previous record was 23.2 feet. Other rivers, and streams that rose significant or crested above flood stage were the Straight, Cannon, Cobb and Le Sueur. ||During the height of the flood event, I-694, I-90, and Highway 169 in Minnesota were closed for a time due to high water. Dozens of county roads were also closed near Waseca, Minnesota in south central MN. Many stalled vehicles, flooded basements and a few localized evacuations took place around southern Minnesota.||Reports from the Minnesota Department of Transportation had numerous state roads closed through Thursday, September 22nd as runoff continued. Some of the major roads that were affected by the flood waters in south central Minnesota included; Highways 13, 14, 30, 71, 83, 22, 28, and 15. ||Several of the main roads didn't reopen until Friday morning, September 23rd. Plus, a few didn't open until the following week. ||In addition to the road closures, several gravel roads experienced erosion. Within the Blue Earth County Park System, Wildwood Park and the Fort Le Hillier Canoe Landing had been closed.||Several daily rainfall records were broken which included; Waseca at 7.64 inches, 5.15 inches at Wells, 3.70 inches at Zumbrota, and 3.09 inches at Winnebago. ||Due to the extreme event, the President of the United States officially declared the significant storm and flooding in September a major disaster. This declaration brought federal and state aid to the following counties: Blue Earth, Freeborn, Goodhue, Le Sueur, Rice, Steele, Waseca, and others in southeast Minnesota. ||The widespread flooding caused significant damage to roads, buildings, and infrastructure. According to a preliminary damage report completed in October 2016, officials determined $8.3 million in public infrastructure damage and $10.1 million in estimated individual needs were noted. Over 6,000 homes and businesses were affected by the flood waters across southern Minnesota. |
| Event narrativeevent_narrative | A local trained weather observer measured 9.76 inches of rainfall in Maple Grove (just west of Fish Lake) between Wednesday afternoon, September 21st, to the early morning of Thursday, September 22nd. |
| Yearyear | 2,016 |
Provenance
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Storage: spine