Alert archive / Iowa / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 21, NWS Des Moines, IA

March 14, 20259 counties in Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Mar 14, 2025, 7:11 PM CDT for 9 counties in Iowa. It was in force for 64 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Mar 14, 2025, 7:11 PM CDT (00:11 UTC)
Expired
Mar 14, 2025, 8:15 PM CDT
In force
64 min
Issued by
NWS Des Moines, IA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Black Hawk County, IA, Bremer County, IA, Butler County, IA, Cerro Gordo County, IA, Franklin County, IA, Grundy County, IA, Hancock County, IA, Winnebago County, IA, Worth County, IA

The radar

The Des Moines radar (KDMX), 141 km from the middle of the area, began a volume at 00:14 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Mar 14, 7:34 PM CDTTSTM WND GST 743 W Washburn, IAPersonal weather station reported a peak gust of 74 mph.
Mar 14, 7:44 PM CDTTSTM WND GST 633 E Gilbertville, IAMultiple personal weather stations in the area reporting 60+ mph wind gusts.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Mar 14, 3:19 PM CDTSevere Thunderstorm WatchSPC5 hr
Mar 14, 5:43 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.2 hours before the alert went out and 229 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2025-03-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 645 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2025-03-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 230 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
645 J/kg
Mixed-layer CIN
-82 J/kg
Mixed-layer LCL
2144 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
230 m²/s²
0-3 km storm-relative helicity
237 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.7

Open this sounding in Storm Lab

The text

As transmitted.

898 
WUUS53 KDMX 150011
SVRDMX
IAC013-017-023-033-069-075-081-189-195-150115-
/O.NEW.KDMX.SV.W.0021.250315T0011Z-250315T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Des Moines IA
711 PM CDT Fri Mar 14 2025

The National Weather Service in Des Moines  has issued a

* Severe Thunderstorm Warning for...
  Black Hawk County in northeastern Iowa...
  Worth County in north central Iowa...
  Bremer County in northeastern Iowa...
  Northeastern Franklin County in north central Iowa...
  Northern Hancock County in north central Iowa...
  Northeastern Grundy County in central Iowa...
  Butler County in north central Iowa...
  Cerro Gordo County in north central Iowa...
  Winnebago County in north central Iowa...

* Until 815 PM CDT.

* At 710 PM CDT, severe thunderstorms were located along a line
  extending from near Eagle Lake State Park to Aredale to 6 miles
  north of Tf Clark State Park, moving northeast at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Clarksville, Lake Mills Municipal Airport, McIntosh Woods State
  Park, Forest City Municipal Airport, Plainfield, Grafton, Waterloo,
  George Wyth State Park, Buffalo Center, Mason City, Readlyn, Eagle
  Lake State Park, Kensett, Ventura, Evansdale, Thompson, Dike, Cedar
  Falls, Hayfield, and Janesville.

This includes the following highways...
 Interstate 35 between mile markers 177 and 218.
 Interstate 380 between mile markers 57 and 73.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4230 9257 4275 9303 4319 9397 4350 9397
      4350 9303 4291 9301 4291 9208 4230 9207
TIME...MOT...LOC 0010Z 216DEG 40KT 4313 9378 4282 9301 4231 9246 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...60 MPH

$$

Fowle
2 follow-up statements
013 
WWUS53 KDMX 150024
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
724 PM CDT Fri Mar 14 2025

IAC013-017-023-033-069-075-081-189-195-150115-
/O.CON.KDMX.SV.W.0021.000000T0000Z-250315T0115Z/
Black Hawk IA-Worth IA-Bremer IA-Franklin IA-Hancock IA-Grundy IA-
Butler IA-Cerro Gordo IA-Winnebago IA-
724 PM CDT Fri Mar 14 2025

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT
FOR BLACK HAWK...WORTH...BREMER...NORTHEASTERN FRANKLIN...NORTHERN
HANCOCK...NORTHEASTERN GRUNDY...BUTLER...CERRO GORDO AND WINNEBAGO
COUNTIES...

At 722 PM CDT, severe thunderstorms were located along a line
extending from near Crystal Lake to near Dougherty to near Hudson,
moving north at 60 mph.

HAZARD...70 mph wind gusts.

SOURCE...Trained weather spotters. At 720pm, a trained spotter 
         reported a wind gust of 71mph in Grundy Center. 

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
Clarksville, Lake Mills Municipal Airport, McIntosh Woods State Park,
Forest City Municipal Airport, Plainfield, Grafton, Waterloo, George
Wyth State Park, Buffalo Center, Mason City, Readlyn, Eagle Lake
State Park, Kensett, Ventura, Evansdale, Thompson, Dike, Cedar Falls,
Hayfield, and Janesville.

This includes the following highways...
 Interstate 35 between mile markers 177 and 218.
 Interstate 380 between mile markers 57 and 73.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4230 9257 4275 9303 4319 9397 4350 9397
      4350 9303 4291 9301 4291 9208 4230 9207
TIME...MOT...LOC 0022Z 182DEG 52KT 4322 9374 4291 9297 4240 9242 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...70 MPH

$$

Fowle
105 
WWUS53 KDMX 150101
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
801 PM CDT Fri Mar 14 2025

IAC033-069-081-189-195-150110-
/O.CAN.KDMX.SV.W.0021.000000T0000Z-250315T0115Z/
Worth IA-Franklin IA-Hancock IA-Cerro Gordo IA-Winnebago IA-
801 PM CDT Fri Mar 14 2025

...THE SEVERE THUNDERSTORM WARNING FOR WORTH...NORTHEASTERN
FRANKLIN...NORTHERN HANCOCK...CERRO GORDO AND WINNEBAGO COUNTIES IS
CANCELLED...

The storms which prompted the warning have weakened. Therefore, the 
warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
central, north central and northeastern Iowa.

LAT...LON 4230 9233 4256 9264 4291 9299 4291 9208
      4230 9207
TIME...MOT...LOC 0100Z 176DEG 55KT 4341 9350 4310 9273 4259 9218 

$$

IAC013-017-023-075-150115-
/O.CON.KDMX.SV.W.0021.000000T0000Z-250315T0115Z/
Black Hawk IA-Bremer IA-Grundy IA-Butler IA-
801 PM CDT Fri Mar 14 2025

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT
FOR BLACK HAWK...BREMER...NORTHEASTERN GRUNDY AND EASTERN BUTLER
COUNTIES...

At 800 PM CDT, severe thunderstorms were located along a line
extending from Lake Mills Municipal Airport to Floyd Crossing to near
Dunkerton, moving north at 60 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Clarksville, Raymond, Plainfield, Dunkerton, Waterloo, New Hartford,
George Wyth State Park, Crossroads Mall, Allison Municipal Airport,
Readlyn, Waverly Municipal Airport, Sumner, Tripoli, Denver,
Evansdale, Shell Rock, Cedar Falls, Janesville, Elk Run Heights, and
Hudson.

This includes Interstate 380 between mile markers 57 and 73.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4230 9233 4256 9264 4291 9299 4291 9208
      4230 9207
TIME...MOT...LOC 0100Z 176DEG 55KT 4341 9350 4310 9273 4259 9218 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Fowle

Nearby

Severe Thunderstorm Warnings in Iowa, 2025Every severe thunderstorm warning in 2025

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.