Storm Events Database

Event Details

Event Heavy Rain
State IOWA
County/Area SAC
WFO DMX
Report Source Trained Spotter
NCDC Data Source CSV
Begin Date 2012-06-15 15:12:00.0 CST-6
Begin Location 0N SAC CITY
Begin Lat/Lon 42.42/-95
End Date 2012-06-15 15:12:00.0 CST-6
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 0.00K
Crop Damage 0.00K
Episode Narrative Thunderstorms from the previous night formed a mesoscale convective vorticity center (MCV) to the southwest of Iowa during the night of the 14th. The MCV moved northeast during the day on the 15th. Heating was somewhat limited due to residual clouds from the previous night, however it warmed enough to destabilize the atmosphere by mid afternoon. CAPE was somewhat limited, around 1000 J/kg, with a lifted index in the zero to -3 range. The shear was stronger than the previous night with 40 to 45 kts available. The freezing level remained high, just above 14,000 feet. The lower levels of the atmosphere were relatively dry, leading to a downdraft CAPE of 900 to 1300 J/kg. That also lead to an LCL around 2000 meters. In spite of the dry low levels, precipitable water values were in the 1.5 to 1.7 inch range. Thunderstorms formed over northern Missouri and southern Iowa during the afternoon and lifted north. For the most part they produced heavy rainfall, resulting in some street flooding in the Des Moines metro area, and also in Sac City in Sac County where 5.5 inches of rain fell during the day. One storm produced high winds and caused tree damage in Pocahontas County. There were also spotty reports of wind damage in Calhoun County. One farm in the Jolley area sustained tree damage and some damage to outbuildings.
Event Narrative Street flooding was caused by a 20 minute period of heavy rain.


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All events for this episode:

Location County/Zone St. Date Time T.Z. Type Mag Dth Inj PrD CrD
Totals: 0 0 50.00K 0.00K
SAC CITY SAC CO. IA 06/15/2012 06:00 CST-6 Heavy Rain 0 0 0.00K 0.00K
KNOKE CALHOUN CO. IA 06/15/2012 15:03 CST-6 Thunderstorm Wind 57 kts. EG 0 0 10.00K 0.00K
JOLLEY CALHOUN CO. IA 06/15/2012 15:05 CST-6 Thunderstorm Wind 52 kts. EG 0 0 10.00K 0.00K
FT DES MOINES POLK CO. IA 06/15/2012 15:12 CST-6 Heavy Rain 0 0 0.00K 0.00K
SAC CITY SAC CO. IA 06/15/2012 15:12 CST-6 Heavy Rain 0 0 0.00K 0.00K
JOLLEY CALHOUN CO. IA 06/15/2012 15:31 CST-6 Thunderstorm Wind 57 kts. EG 0 0 25.00K 0.00K
FONDA POCAHONTAS CO. IA 06/15/2012 15:40 CST-6 Thunderstorm Wind 50 kts. EG 0 0 2.00K 0.00K
VARINA POCAHONTAS CO. IA 06/15/2012 15:44 CST-6 Thunderstorm Wind 52 kts. EG 0 0 3.00K 0.00K
POCAHONTAS POCAHONTAS CO. IA 06/15/2012 16:07 CST-6 Heavy Rain 0 0 0.00K 0.00K
Totals: 0 0 50.00K 0.00K