Alert archive / Iowa / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 21, NWS Des Moines, IA

March 31, 20234 counties in Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Mar 31, 2023, 4:19 PM CDT for 4 counties in Iowa. It was in force for 56 min. 5 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 31, 2023, 4:19 PM CDT (21:19 UTC)
Expired
Mar 31, 2023, 5:15 PM CDT
In force
56 min
Issued by
NWS Des Moines, IA
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

Counties Mahaska County, IA, Marion County, IA, Monroe County, IA, Poweshiek County, IA

The radar

The Des Moines radar (KDMX), 101 km from the middle of the area, began a volume at 21:18 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 31, 4:21 PM CDTHAIL 12 E Attica, IA
Mar 31, 4:21 PM CDTHAIL 1Attica, IACORRECTS PREVIOUS NON-TSTM WND GST REPORT FROM ATTICA. HAIL CAME IN THREE WAVES WITH LARGEST IN LAST WAVE (QUARTER SIZED).
Mar 31, 4:21 PM CDTNON-TSTM WND GST 1Attica, IAHAIL CAME IN THREE WAVES WITH LARGEST IN LAST WAVE (QUARTER SIZED).
Mar 31, 4:25 PM CDTTSTM WND GST 70Bussey, IAESTIMATED 60-70 MPH WIND GUSTS. PEA-SIZED HAIL. LOST POWER/INTERNET.
Mar 31, 5:02 PM CDTNON-TSTM WND GST 583 Wnw Fremont, IA

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 31, 11:46 AM CDTTornado Watch PDSSPC8 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 9.3 hours before the alert went out and 185 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, Davenport, at 12:00Z on 2023-03-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 12:00Z on 2023-03-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 433 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
897 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
433 m²/s²
0-3 km storm-relative helicity
424 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

883 
WUUS53 KDMX 312119
SVRDMX
IAC123-125-135-157-312215-
/O.NEW.KDMX.SV.W.0021.230331T2119Z-230331T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Des Moines IA
419 PM CDT Fri Mar 31 2023

The National Weather Service in Des Moines  has issued a

* Severe Thunderstorm Warning for...
  Northern Monroe County in south central Iowa...
  Southeastern Poweshiek County in central Iowa...
  Southeastern Marion County in south central Iowa...
  Mahaska County in south central Iowa...

* Until 515 PM CDT.

* At 418 PM CDT, a severe thunderstorm was located 6 miles southwest
  of Lovilia, or 10 miles west of Albia, moving northeast at 55 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Lovilia around 425 PM CDT.
  Bussey and Hamilton around 430 PM CDT.

Other locations in the path of this severe thunderstorm include
Eddyville, Beacon, Oskaloosa, University Park, Keomah Village, Lake
Keomah State Park, Oskaloosa Municipal Airport and Rose Hill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A Tornado Watch remains in effect until 800 PM CDT for south central,
central and southeastern Iowa.

&&

LAT...LON 4151 9241 4120 9241 4116 9253 4116 9264
      4112 9264 4097 9308 4116 9310 4116 9312
      4123 9313 4164 9230 4151 9230
TIME...MOT...LOC 2118Z 234DEG 48KT 4108 9300 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Hagenhoff
3 follow-up statements
173 
WWUS53 KDMX 312131
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
431 PM CDT Fri Mar 31 2023

IAC135-312141-
/O.CAN.KDMX.SV.W.0021.000000T0000Z-230331T2215Z/
Monroe IA-
431 PM CDT Fri Mar 31 2023

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN MONROE COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 800 PM CDT for south central,
central and southeastern Iowa.

LAT...LON 4151 9241 4120 9241 4116 9253 4116 9289
      4131 9298 4164 9230 4151 9230
TIME...MOT...LOC 2131Z 234DEG 48KT 4118 9281 

$$

IAC123-125-157-312215-
/O.CON.KDMX.SV.W.0021.000000T0000Z-230331T2215Z/
Poweshiek IA-Marion IA-Mahaska IA-
431 PM CDT Fri Mar 31 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR SOUTHEASTERN POWESHIEK...SOUTHEASTERN MARION AND MAHASKA
COUNTIES...

At 431 PM CDT, a severe thunderstorm was located near Bussey, or 10
miles north of Albia, moving northeast at 55 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Trained weather spotters.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
  Eddyville, Beacon, Leighton, Oskaloosa, University Park, Keomah 
  Village, Lake Keomah State Park, Oskaloosa Municipal Airport and 
  Rose Hill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 800 PM CDT for south central,
central and southeastern Iowa.

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

&&

LAT...LON 4151 9241 4120 9241 4116 9253 4116 9289
      4131 9298 4164 9230 4151 9230
TIME...MOT...LOC 2131Z 234DEG 48KT 4118 9281 

HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Hagenhoff
363 
WWUS53 KDMX 312143
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
443 PM CDT Fri Mar 31 2023

IAC125-312153-
/O.CAN.KDMX.SV.W.0021.000000T0000Z-230331T2215Z/
Marion IA-
443 PM CDT Fri Mar 31 2023

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MARION COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 800 PM CDT for south central,
central and southeastern Iowa.

LAT...LON 4151 9241 4120 9241 4116 9253 4116 9260
      4141 9278 4164 9230 4151 9230
TIME...MOT...LOC 2143Z 234DEG 48KT 4128 9263 

$$

IAC123-157-312215-
/O.CON.KDMX.SV.W.0021.000000T0000Z-230331T2215Z/
Poweshiek IA-Mahaska IA-
443 PM CDT Fri Mar 31 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR SOUTHEASTERN POWESHIEK AND MAHASKA COUNTIES...

At 443 PM CDT, a severe thunderstorm was located over Oskaloosa,
moving northeast at 55 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Trained weather spotters.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Oskaloosa, New Sharon, Fremont, Beacon, University Park, Deep River,
Barnes City, Rose Hill, Keomah Village, Lake Keomah State Park and
Oskaloosa Municipal Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 800 PM CDT for south central,
central and southeastern Iowa.

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

&&

LAT...LON 4151 9241 4120 9241 4116 9253 4116 9260
      4141 9278 4164 9230 4151 9230
TIME...MOT...LOC 2143Z 234DEG 48KT 4128 9263 

HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Hagenhoff
998 
WWUS53 KDMX 312156
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
456 PM CDT Fri Mar 31 2023

IAC123-157-312215-
/O.CON.KDMX.SV.W.0021.000000T0000Z-230331T2215Z/
Poweshiek IA-Mahaska IA-
456 PM CDT Fri Mar 31 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR SOUTHEASTERN POWESHIEK AND NORTHEASTERN MAHASKA COUNTIES...

At 456 PM CDT, a severe thunderstorm was located near Coal Creek, or
12 miles northeast of Oskaloosa, moving northeast at 55 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Trained weather spotters.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Deep River and Barnes City. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 800 PM CDT for south central
and central Iowa.

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

&&

LAT...LON 4151 9241 4129 9241 4150 9260 4164 9230
      4151 9230
TIME...MOT...LOC 2156Z 234DEG 48KT 4139 9244 

HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Hagenhoff

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 31, 3:30 AM CDTWind AdvisoryDMXAdair, Adams, Appanoose, Audubon, Black Hawk, Boone and 34 more28 hr
Mar 31, 3:38 AM CDTWinter Weather AdvisoryDMXCerro Gordo, Emmet, Franklin, Hancock, Humboldt, Kossuth and 5 more27 hr
Mar 31, 12:30 PM CDTSevere Thunderstorm WarningDMXClarke, Decatur, Ringgold, Union45 min
Mar 31, 12:36 PM CDTSevere Thunderstorm WarningDMXClarke, Decatur, Lucas, Madison, Warren39 min
Mar 31, 12:40 PM CDTTornado WarningDMXClarke, Decatur, Ringgold, Union39 min
Mar 31, 1:18 PM CDTSevere Thunderstorm WarningDMXClarke, Lucas, Marion, Warren42 min
Mar 31, 1:57 PM CDTSevere Thunderstorm Warning Considerable damage threatDMXClarke, Madison, Union, Warren48 min
Mar 31, 2:01 PM CDTSevere Thunderstorm WarningDMXDallas, Madison, Polk, Warren29 min
Mar 31, 2:03 PM CDTSevere Thunderstorm WarningDMXJasper, Marion, Warren42 min
Mar 31, 2:07 PM CDTSevere Thunderstorm Warning Considerable damage threatDMXClarke, Decatur, Lucas, Warren38 min
Mar 31, 2:13 PM CDTSevere Thunderstorm WarningDMXBoone, Dallas, Polk, Story47 min
Mar 31, 2:25 PM CDTSevere Thunderstorm Warning Considerable damage threatDMXAppanoose, Davis, Monroe, Wayne50 min
Mar 31, 2:41 PM CDTSevere Thunderstorm WarningDMXJasper, Marshall, Poweshiek, Tama42 min
Mar 31, 2:41 PM CDTSevere Thunderstorm WarningDMXJasper, Lucas, Marion, Warren49 min
Mar 31, 2:46 PM CDTSevere Thunderstorm Warning Considerable damage threatDMXBoone, Grundy, Hamilton, Hardin, Marshall, Story59 min
Mar 31, 3:01 PM CDTBlizzard WarningDMXEmmet16 hr
Mar 31, 3:01 PM CDTWinter Storm WarningDMXHancock, Kossuth, Palo Alto, Winnebago, Worth16 hr
Mar 31, 3:02 PM CDTTornado WarningDMXAppanoose, Davis, Monroe, Wapello43 min
Mar 31, 3:05 PM CDTSevere Thunderstorm WarningDMXAppanoose, Davis, Monroe, Wapello, Wayne40 min
Mar 31, 3:20 PM CDTSevere Thunderstorm Warning Destructive damage threatDMXDavis, Mahaska, Monroe, Wapello40 min
Mar 31, 3:23 PM CDTSevere Thunderstorm WarningDMXJasper, Mahaska, Marion, Poweshiek, Tama37 min
Mar 31, 3:39 PM CDTSevere Thunderstorm WarningDMXAppanoose, Davis, Monroe, Wapello51 min
Mar 31, 3:42 PM CDTTornado Warning Tornado observedDMXWapello18 min
Mar 31, 3:49 PM CDTSevere Thunderstorm WarningDMXHancock, Kossuth, Winnebago56 min
Mar 31, 3:53 PM CDTTornado WarningDMXTama33 min
Mar 31, 3:54 PM CDTSevere Thunderstorm WarningDMXBlack Hawk, Jasper, Mahaska, Marion, Poweshiek, Tama51 min
Mar 31, 3:55 PM CDTSevere Thunderstorm WarningDMXPoweshiek35 min
Mar 31, 3:56 PM CDTTornado WarningDMXPoweshiek34 min
Mar 31, 4:17 PM CDTSevere Thunderstorm WarningDMXCerro Gordo, Franklin, Hancock, Winnebago, Worth36 min
Mar 31, 4:24 PM CDTSevere Thunderstorm WarningDMXBlack Hawk, Bremer, Butler, Cerro Gordo, Franklin, Grundy and 5 more62 min
Mar 31, 4:27 PM CDTTornado WarningDMXBlack Hawk, Bremer, Butler, Franklin, Grundy, Hardin34 min
Mar 31, 4:28 PM CDTTornado WarningDMXBlack Hawk, Grundy, Marshall, Tama34 min
Mar 31, 4:34 PM CDTTornado WarningDMXBlack Hawk, Bremer, Butler, Grundy, Marshall, Tama29 min
Mar 31, 4:40 PM CDTSevere Thunderstorm WarningDMXJasper, Mahaska, Poweshiek32 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2023Every severe thunderstorm warning in 2023

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.