Storm Events Database

Event Details

Event Thunderstorm Wind
Magnitude 57 kts.
State IOWA
County/Area GRUNDY
WFO DMX
Begin Date 05/02/2012 01:40:00 CST-6
Begin Range 0
Begin Azimuth N
Begin Location REINBECK
Begin Lat/Lon 42.32/-92.6
End Date 05/02/2012 01:40:00 CST-6
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 5.00K
Crop Damage 0.00K
Episode Narrative A strong push of moist air occurred during the day on the 1st with surface dewpoint readings climbing to the mid 50s to mid 60s across the state. The low level jet increased in strength during the evening with wind speeds around 45 kts by mid evening, helping to push precipitable water values to around 1.25 inches. The atmosphere became unstable with CAPE values in the 2000 to 3000 J/kg range. Downdraft CAPE was in the 900 J/kg range with a relatively low LCL of 750 meters. Wind shear, though not strong, was sufficient with 35 to 45 kts of available shear. The CAPE in the -10 to -30 C layer of the atmosphere was between 200 and 300 J/kg. The freezing level was around 13,000 feet. A line of thunderstorms formed ahead of the approaching cold front from South Dakota and moved southeast into Iowa during the mid to late evening hours. They produced gusty winds and hail as they passed. The stronger storms produced winds of 60 MPH over northwest into parts of north central and central Iowa, along with hail up to quarter size. Significant damage occurred in the Ames area as high winds of 70 to 75 MPH moved through Story County. Large trees were downed in the city. The garage doors and gutters were damaged on an apartment complex. A house was significantly damaged as a large tree was blown down onto it. The strongest winds were estimated to be around 85 MPH due to a microburst. Around the county, there were numerous reports of tree and outbuilding damage as well.
Event Narrative Large limb toppled a power line which fell across IA 175 in Reinbeck. Several other large limbs down across the west side of town.


All events for this episode:

Location County/Zone St. Date Time T.Z. Type Mag Dth Inj PrD CrD
Totals: 0 0 620.00K 0.00K
GRAETTINGER PALO ALTO CO. IA 05/01/2012 21:20 CST-6 Thunderstorm Wind 61 kts. EG 0 0 10.00K 0.00K
WHITTEMORE KOSSUTH CO. IA 05/01/2012 21:55 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
WHITTEMORE KOSSUTH CO. IA 05/01/2012 21:58 CST-6 Hail 1.00 in. 0 0 3.00K 0.00K
SAC CITY SAC CO. IA 05/01/2012 22:34 CST-6 Hail 0.75 in. 0 0 0.00K 0.00K
(FOD)FT DODGE MUNI A WEBSTER CO. IA 05/01/2012 22:34 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
DELOIT CRAWFORD CO. IA 05/01/2012 23:25 CST-6 Thunderstorm Wind 52 kts. EG 0 0 2.00K 0.00K
FRASER BOONE CO. IA 05/02/2012 00:35 CST-6 Thunderstorm Wind 52 kts. EG 0 0 20.00K 0.00K
FANSLERS GUTHRIE CO. IA 05/02/2012 00:35 CST-6 Thunderstorm Wind 61 kts. EG 0 0 10.00K 0.00K
BOONE BOONE CO. IA 05/02/2012 00:40 CST-6 Thunderstorm Wind 61 kts. EG 0 0 100.00K 0.00K
AMES STORY CO. IA 05/02/2012 00:50 CST-6 Thunderstorm Wind 57 kts. EG 0 0 25.00K 0.00K
AMES STORY CO. IA 05/02/2012 00:50 CST-6 Thunderstorm Wind 74 kts. EG 0 0 50.00K 0.00K
AMES STORY CO. IA 05/02/2012 00:50 CST-6 Thunderstorm Wind 74 kts. EG 0 0 250.00K 0.00K
AMES STORY CO. IA 05/02/2012 00:51 CST-6 Thunderstorm Wind 57 kts. EG 0 0 25.00K 0.00K
AMES ARPT STORY CO. IA 05/02/2012 00:52 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
AMES STORY CO. IA 05/02/2012 00:52 CST-6 Thunderstorm Wind 53 kts. MG 0 0 25.00K 0.00K
AMES STORY CO. IA 05/02/2012 00:53 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
AMES STORY CO. IA 05/02/2012 00:55 CST-6 Thunderstorm Wind 63 kts. MG 0 0 50.00K 0.00K
ROLAND STORY CO. IA 05/02/2012 00:59 CST-6 Thunderstorm Wind 57 kts. EG 0 0 10.00K 0.00K
STATE CENTER MARSHALL CO. IA 05/02/2012 01:19 CST-6 Thunderstorm Wind 61 kts. EG 0 0 15.00K 0.00K
REINBECK GRUNDY CO. IA 05/02/2012 01:40 CST-6 Thunderstorm Wind 57 kts. EG 0 0 5.00K 0.00K
PRAIRIE CITY JASPER CO. IA 05/02/2012 01:58 CST-6 Hail 0.88 in. 0 0 0.00K 0.00K
Totals: 0 0 620.00K 0.00K