Storm Events Database

Event Details

Event Blizzard
State IOWA
County/Area GRUNDY
WFO DMX
Begin Date 02/01/2011 19:00:00 CST-6
End Date 02/02/2011 02:00:00 CST-6
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 25.00K
Crop Damage 0.00K
Episode Narrative A powerful storm system moved into the southwest U.S. on January 31st into the 1st The system moved east-northeast across the southern U.S. on the 1st into early the 2nd. Surface low pressure developed over west Texas. The low tracked across Arkansas and eventually through the Ohio River Valley. A considerable amount of moisture was drawn north into the storm system. A very large shield of precipitation developed to the north of the low pressure track. The main deformation zone was nearly 4 degrees wide, covering a large part of the mid section of the country. Snow spread north into Iowa during the afternoon of the 1st and picked up in intensity rapidly during the late afternoon and early evening hours. The low pressure system deepened rapidly as well. A strong pressure gradient was in place over the state. As the low crossed extreme southern Illinois, the pressure dropped to about 995 mb. At the same time a high pressure of nearly 1050 mb was located over western North Dakota. Winds increased rapidly during the evening with sustained winds of 25 to 35 MPH across most of the state. Winds gusted to around 50 MPH over the southeast half. The combination of falling snow and strong winds dropped visibility to less than 1/4 mile for several hours. Whiteout conditions were reported in many rural areas. Roads became impassible in places, and treacherous everywhere. Several highways were closed, however most of the main highways remained open, including Interstate 80. Numerous businesses and nearly all schools closed by the afternoon of the 1st and remained closed on the 2nd. Snowfall of 6 inches or more occurred over about the southeast half of the state, with accumulations in excess of 8 inches over the southeast third. The heaviest accumulation in the Des Moines CWA was 12.3 inches in the Centerville area of Appanoose County. In Monroe County, 11.9 inches was reported in Albia with 11.4 inches falling around Allerton in Wayne County. In Poweshiek County 10.9 inches of snow was recorded at Grinnell. The heavier snow accumulation over southeast Iowa was in part the result of convection. There were numerous reports of thundersnow from Ottumwa north toward the Grinnell area. This is the same event also listed in Stormdata as the 01 February Winter Storm for southwest into west central Iowa.
Event Narrative


All events for this episode:

Location County/Zone St. Date Time T.Z. Type Mag Dth Inj PrD CrD
Totals: 0 0 675.00K 0.00K
DECATUR (ZONE) DECATUR (ZONE) IA 02/01/2011 17:00 CST-6 Blizzard 0 0 25.00K 0.00K
WAYNE (ZONE) WAYNE (ZONE) IA 02/01/2011 17:00 CST-6 Blizzard 0 0 25.00K 0.00K
APPANOOSE (ZONE) APPANOOSE (ZONE) IA 02/01/2011 17:00 CST-6 Blizzard 0 0 25.00K 0.00K
DAVIS (ZONE) DAVIS (ZONE) IA 02/01/2011 17:00 CST-6 Blizzard 0 0 25.00K 0.00K
RINGGOLD (ZONE) RINGGOLD (ZONE) IA 02/01/2011 17:00 CST-6 Blizzard 0 0 25.00K 0.00K
CLARKE (ZONE) CLARKE (ZONE) IA 02/01/2011 17:00 CST-6 Blizzard 0 0 25.00K 0.00K
LUCAS (ZONE) LUCAS (ZONE) IA 02/01/2011 17:00 CST-6 Blizzard 0 0 25.00K 0.00K
MONROE (ZONE) MONROE (ZONE) IA 02/01/2011 17:00 CST-6 Blizzard 0 0 25.00K 0.00K
WAPELLO (ZONE) WAPELLO (ZONE) IA 02/01/2011 17:00 CST-6 Blizzard 0 0 25.00K 0.00K
UNION (ZONE) UNION (ZONE) IA 02/01/2011 17:00 CST-6 Blizzard 0 0 25.00K 0.00K
POLK (ZONE) POLK (ZONE) IA 02/01/2011 19:00 CST-6 Blizzard 0 0 25.00K 0.00K
DALLAS (ZONE) DALLAS (ZONE) IA 02/01/2011 19:00 CST-6 Blizzard 0 0 25.00K 0.00K
MAHASKA (ZONE) MAHASKA (ZONE) IA 02/01/2011 19:00 CST-6 Blizzard 0 0 25.00K 0.00K
MARION (ZONE) MARION (ZONE) IA 02/01/2011 19:00 CST-6 Blizzard 0 0 25.00K 0.00K
WARREN (ZONE) WARREN (ZONE) IA 02/01/2011 19:00 CST-6 Blizzard 0 0 25.00K 0.00K
MADISON (ZONE) MADISON (ZONE) IA 02/01/2011 19:00 CST-6 Blizzard 0 0 25.00K 0.00K
JASPER (ZONE) JASPER (ZONE) IA 02/01/2011 19:00 CST-6 Blizzard 0 0 25.00K 0.00K
POWESHIEK (ZONE) POWESHIEK (ZONE) IA 02/01/2011 19:00 CST-6 Blizzard 0 0 25.00K 0.00K
BOONE (ZONE) BOONE (ZONE) IA 02/01/2011 19:00 CST-6 Blizzard 0 0 25.00K 0.00K
STORY (ZONE) STORY (ZONE) IA 02/01/2011 19:00 CST-6 Blizzard 0 0 25.00K 0.00K
MARSHALL (ZONE) MARSHALL (ZONE) IA 02/01/2011 19:00 CST-6 Blizzard 0 0 25.00K 0.00K
TAMA (ZONE) TAMA (ZONE) IA 02/01/2011 19:00 CST-6 Blizzard 0 0 25.00K 0.00K
GRUNDY (ZONE) GRUNDY (ZONE) IA 02/01/2011 19:00 CST-6 Blizzard 0 0 25.00K 0.00K
BLACK HAWK (ZONE) BLACK HAWK (ZONE) IA 02/01/2011 19:00 CST-6 Blizzard 0 0 25.00K 0.00K
BUTLER (ZONE) BUTLER (ZONE) IA 02/01/2011 19:00 CST-6 Blizzard 0 0 25.00K 0.00K
HARDIN (ZONE) HARDIN (ZONE) IA 02/01/2011 19:00 CST-6 Blizzard 0 0 25.00K 0.00K
BREMER (ZONE) BREMER (ZONE) IA 02/01/2011 19:00 CST-6 Blizzard 0 0 25.00K 0.00K
Totals: 0 0 675.00K 0.00K