A weak cold front moved into Iowa during the afternoon of the 24th through the evening hours.  The airmass was very moist and unstable with dewpoint values in the mid 70s over a large part of the state.  CAPE during the evening was around 3000 J/kg.  The effective shear was higher than it had been in recent days with around 40 kts available.  The downdraft CAPE was near 1000 J/kg with CAPE in the -10 to -30 C layer of the atmosphere around 800 J/kg.  Deep moisture was present with precipitable water near 1.7 inches along the front.  Thunderstorms formed in a line along the front during the evening.  Most of the storms produced gusty winds and hail around one half inch in diameter.  A severe thunderstorm produced quarter size hail north and west of Fort Dodge in Webster County.  Another storm produced quarter size hail in the Dakota City area of Humboldt County.  Wind damage occurred in Wright and Hancock Counties as high winds toppled trees.  After midnight, a scattered line of thunderstorms formed south of the main line.  One of the storms produced high winds and toppled trees in Cedar Falls.

Hail in HUMBOLDT, IOWA
From 24-AUG-14 22:26:00 to 24-AUG-14 22:33:00 (CST-6)
Location: DAKOTA CITY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 10.00K
Reported by: Social Media

Quarter size hail was reported by a driver driving north on P56 from C48 to C44 from around 2226 CST to 2233.

Thunderstorm Wind in BLACK HAWK, IOWA
From 25-AUG-14 01:25:00 to 25-AUG-14 01:25:00 (CST-6)
Location: CEDAR FALLS
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Winds toppled trees at the corner of Orchard Drive and Laurinda in Cedar Falls.

Thunderstorm Wind in WRIGHT, IOWA
From 25-AUG-14 03:10:00 to 25-AUG-14 03:10:00 (CST-6)
Location: BELMOND
Magnitude: 51.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down on a gravel road just north of Belmond.

Thunderstorm Wind in WRIGHT, IOWA
From 25-AUG-14 03:45:00 to 25-AUG-14 03:45:00 (CST-6)
Location: WOOLSTOCK
Magnitude: 51.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down along highway 17.

Hail in WEBSTER, IOWA
From 24-AUG-14 22:50:00 to 24-AUG-14 22:50:00 (CST-6)
Location: FT DODGE
Magnitude: 1.00 
Property damage: 2.00K
Crop damage: 10.00K
Reported by: COOP Observer

Pea to quarter size hail occurred.  Small tree branches were blown down.

Hail in WRIGHT, IOWA
From 24-AUG-14 23:05:00 to 24-AUG-14 23:05:00 (CST-6)
Location: OLAF
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 50.00K
Reported by: Fire Department/Rescue

Winds were also estimated in the 45 to 50 MPH range.

Thunderstorm Wind in WRIGHT, IOWA
From 25-AUG-14 00:00:00 to 25-AUG-14 00:00:00 (CST-6)
Location: CLARION
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Post Office

A healthy tree 24 inches in diameter was snapped near the base by strong winds.

Hail in WRIGHT, IOWA
From 25-AUG-14 03:00:00 to 25-AUG-14 03:00:00 (CST-6)
Location: CLARION
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 10.00K
Reported by: Law Enforcement

Thunderstorm Wind in HANCOCK, IOWA
From 24-AUG-14 23:05:00 to 24-AUG-14 23:05:00 (CST-6)
Location: KANAWHA
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: COOP Observer

Several 4 to 6 inch diameter tree limbs were blown down by high winds.

Hail in WEBSTER, IOWA
From 24-AUG-14 22:54:00 to 24-AUG-14 22:54:00 (CST-6)
Location: (FOD)FT DODGE MUNI A
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 5.00K
Reported by: Trained Spotter

Pea to quarter sized hail at their residence.