Storm Events Database

Event Details:

Event Tornado
-- Scale EF0
-- Length 0.9 Miles
-- Width 200 Yards
County/Area CHISAGO
Report Source NWS Storm Survey
NCEI Data Source CSV
Begin Date 2009-08-19 15:00:00.0 CST-6
Begin Location 1SE NORTH BRANCH
Begin Lat/Lon 45.5061/-92.9616
End Date 2009-08-19 15:04:00.0 CST-6
End Lat/Lon 45.5167/-92.9725
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 100.00K
Crop Damage 0.00K
Episode Narrative During the afternoon of August 19th, a large area of generally moderate to heavy showers occurred across most of south central and east central Minnesota. The area had very few lightning strikes, and most of the shower activity was racing northward at 40 to 50 mph. An area of low pressure developed across east central Minnesota during the afternoon, and began to intensify prior to the tornado development. Several weak areas of intense showers moved northward across the Twin Cities metro area. Low level humidity levels were very high, which provided a very low cloud base around 1000'. Although weak circulations were noted on radar, not until the surface low intensified and allowed for an overall increase in the surface inflow, did tornadoes develop. Most of the tornadoes were weak.
Event Narrative A National Weather Service Storm Survey determined that an EF-0 tornado tracked from near the North Branch Middle School, northwest to near Rivercrest and Riverview Courts in North Branch, Minnesota. Roof damage was indicated at the middle school, with a telephone pole snapped, and major trees blown down in the residential area. Based on roof damage and trees blown down, winds were estimated at 70 to 80 mph.


Event Map:

Note: The tornado track is approximate based on the beginning (B) and ending (E) locations. The actual tornado path may differ from a straight line.

All events for this episode:

Location County/Zone St. Date Time T.Z. Type Mag Dth Inj PrD CrD
Totals: 0 0 825.00K 75.00K
RICHFIELD HENNEPIN CO. MN 08/19/2009 12:50 CST-6 Tornado EF0 0 0 500.00K 0.00K
BLOOMINGTON HENNEPIN CO. MN 08/19/2009 13:00 CST-6 Heavy Rain 0 0 0.00K 0.00K
BROOKLYN PARK HENNEPIN CO. MN 08/19/2009 13:15 CST-6 Thunderstorm Wind 50 kts. EG 0 0 25.00K 0.00K
NEW TRIER DAKOTA CO. MN 08/19/2009 13:16 CST-6 Tornado EF1 0 0 25.00K 50.00K
POINT DOUGLAS WASHINGTON CO. MN 08/19/2009 13:40 CST-6 Tornado EF1 0 0 100.00K 0.00K
WOODBURY WASHINGTON CO. MN 08/19/2009 13:54 CST-6 Thunderstorm Wind 50 kts. EG 0 0 50.00K 0.00K
LAKE NETTA ANOKA CO. MN 08/19/2009 14:07 CST-6 Tornado EF0 0 0 0.00K 0.00K
MARINE ON ST CROIX WASHINGTON CO. MN 08/19/2009 14:25 CST-6 Tornado EF0 0 0 25.00K 0.00K
NORTH BRANCH CHISAGO CO. MN 08/19/2009 15:00 CST-6 Tornado EF0 0 0 100.00K 0.00K
SPRINGFIELD BROWN CO. MN 08/19/2009 17:28 CST-6 Tornado EF0 0 0 0.00K 25.00K
Totals: 0 0 825.00K 75.00K