Alert archive / Iowa / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 113, NWS Des Moines, IA

June 24, 2023Kossuth County, Palo Alto County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 24, 2023, 11:24 PM CDT for Kossuth County, Palo Alto County, Iowa. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 24, 2023, 11:24 PM CDT (04:24 UTC)
Expired: Jun 25, 2023, 12:15 AM CDT
In force: 51 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Kossuth County, IA, Palo Alto County, IA

The radar

The Des Moines radar (KDMX), 156 km from the middle of the area, began a volume at 04:25 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jun 24, 10:14 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 4.4 hours before the alert went out and 200 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 647 J/kg
Mixed-layer CIN: -93 J/kg
Mixed-layer LCL: 1070 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 90 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

276 
WUUS53 KDMX 250424
SVRDMX
IAC109-147-250515-
/O.NEW.KDMX.SV.W.0113.230625T0424Z-230625T0515Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Des Moines IA
1124 PM CDT Sat Jun 24 2023

The National Weather Service in Des Moines  has issued a

* Severe Thunderstorm Warning for...
  Southern Kossuth County in north central Iowa...
  East central Palo Alto County in northwestern Iowa...

* Until 1215 AM CDT.

* At 1123 PM CDT, a severe thunderstorm was located 5 miles north of
  Whittemore, or 8 miles northwest of Algona, moving east at 30 mph.

  HAZARD...60 mph wind gusts and quarter 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...
  Algona, Algona Municipal Airport and Aa Call State Park around 
  1135 PM CDT.
  Burt around 1140 PM CDT.

Other locations in the path of this severe thunderstorm include
Sexton, Titonka and Wesley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4300 9397 4303 9447 4319 9449 4327 9397
TIME...MOT...LOC 0423Z 257DEG 27KT 4313 9439 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Donavon

3 follow-up statements

246 
WWUS53 KDMX 250441
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
1141 PM CDT Sat Jun 24 2023

IAC147-250450-
/O.CAN.KDMX.SV.W.0113.000000T0000Z-230625T0515Z/
Palo Alto IA-
1141 PM CDT Sat Jun 24 2023

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

A Severe Thunderstorm Watch remains in effect until 300 AM CDT for
north central Iowa.

LAT...LON 4303 9443 4319 9442 4327 9397 4300 9397
TIME...MOT...LOC 0440Z 262DEG 25KT 4313 9421 

$$

IAC109-250515-
/O.CON.KDMX.SV.W.0113.000000T0000Z-230625T0515Z/
Kossuth IA-
1141 PM CDT Sat Jun 24 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT
FOR SOUTHERN KOSSUTH COUNTY...

At 1140 PM CDT, a severe thunderstorm was located near Algona, moving
east at 30 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
  St. Benedict, Sexton, Titonka and Wesley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4303 9443 4319 9442 4327 9397 4300 9397
TIME...MOT...LOC 0440Z 262DEG 25KT 4313 9421 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Donavon

444 
WWUS53 KDMX 250454
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
1154 PM CDT Sat Jun 24 2023

IAC109-250515-
/O.CON.KDMX.SV.W.0113.000000T0000Z-230625T0515Z/
Kossuth IA-
1154 PM CDT Sat Jun 24 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT
FOR SOUTHEASTERN KOSSUTH COUNTY...

At 1154 PM CDT, a severe thunderstorm was located near Sexton, or 8
miles northeast of Algona, moving east at 35 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Algona, Burt, Titonka, Wesley, St. Benedict, Irvington, Sexton,
Algona Municipal Airport and Aa Call State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4302 9432 4321 9429 4327 9397 4300 9397
TIME...MOT...LOC 0454Z 262DEG 32KT 4312 9407 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Donavon

279 
WWUS53 KDMX 250508
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
1208 AM CDT Sun Jun 25 2023

IAC109-250518-
/O.EXP.KDMX.SV.W.0113.000000T0000Z-230625T0515Z/
Kossuth IA-
1208 AM CDT Sun Jun 25 2023

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN KOSSUTH COUNTY
WILL EXPIRE AT 1215 AM CDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 300 AM CDT for
north central Iowa.

LAT...LON 4302 9432 4321 9429 4327 9397 4300 9397
TIME...MOT...LOC 0508Z 257DEG 31KT 4315 9388 

$$

Small

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Des Moines, IA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 24, 6:29 PM CDT, 4 hours 55 minutes earlier.

Area forecast discussion, Jun 24, 6:29 PM CDT, 4 hours 55 minutes before

Area Forecast Discussion
National Weather Service Des Moines IA
629 PM CDT Sat Jun 24 2023

...Updated for the 00z Aviation Discussion...

.SHORT TERM.../Tonight through Sunday Night/
Issued at 217 PM CDT Sat Jun 24 2023

Forecast Impacts for the week:

...Lingering storms this evening/showers Sunday
...Cooler Monday/Tuesday & Mid to late week heat/scat storms
...Cooling into weekend

Confidence Short Term: High

Severe storms the main concern this afternoon and early evening.
Ongoing convection over north central along US20 continues to
increase while another area of concern is the south along the old
outflow boundary which is currently situated from southwest to
central Iowa, extending from US71 in the west southeast to between
US34 and US92. Initial development likely to include supercells with
all modes possible. As upper level wave moves into the area this
afternoon, storms will begin to migrate east into eastern Iowa.
After the storms exit later this evening, expecting a lull for
several hours with another round of more elevated storms over
northern Iowa into the morning hours. Sunday, the upper level low
begins to swing south with scattered showers and thunderstorms
expected to redevelop in the later morning and afternoon hours.
Lingering showers will continue into Sunday night, but then by early
Monday morning most of the showers will have exited. Lows tonight
will drop to the lower 60s northwest to the mid 60s southeast. Highs
Sunday along with stronger west winds increasing to 15 to 25 mph
will range from the the upper 60s northwest to the upper 70s
southeast. We will continue to trend lower on temperatures into
Sunday night with lows dropping into the upper 50s north to the
lower 60s southeast.

&&

.LONG TERM.../Monday through Saturday/Forecast Impacts for the week:

...Lingering storms this evening/showers Sunday
...Cooler Monday/Tuesday & Mid to late week heat/scat storms
...Cooling into weekend

Confidence Short Term: High

Severe storms the main concern this afternoon and early evening.
Ongoing convection over north central along US20 continues to
increase while another area of concern is the south along the old
outflow boundary which is currently situated from southwest to
central Iowa, extending from US71 in the west southeast to between
US34 and US92. Initial development likely to include supercells with
all modes possible. As upper level wave moves into the area this
afternoon, storms will begin to migrate east into eastern Iowa.
After the storms exit later this evening, expecting a lull for
several hours with another round of more elevated storms over
northern Iowa into the morning hours. Sunday, the upper level low
begins to swing south with scattered showers and thunderstorms
expected to redevelop in the later morning and afternoon hours.
Lingering showers will continue into Sunday night, but then by early
Monday morning most of the showers will have exited. Lows tonight
will drop to the lower 60s northwest to the mid 60s southeast. Highs
Sunday along with stronger west winds increasing to 15 to 25 mph
will range from the the upper 60s northwest to the upper 70s
southeast. We will continue to trend lower on temperatures into
Sunday night with lows dropping into the upper 50s north to the
lower 60s southeast.
Issued at 217 PM CDT Sat Jun 24 2023

Confidence: Medium

After the system exits the region by Monday afternoon, lingering
showers will be possible east during the day as some lingering lift
and cyclonic circulation remains over the region. High pressure will
cross the region and keep the region dry for the next 36 hours. A
developing lee side system and some return of moisture will enter
the picture by late Tuesday night into Wednesday as scattered
overnight storms return to our western areas mainly west of I35.
Though bulk wind shear will be favorable for some stronger storms
Wednesday, it appears that instability will be somewhat limited
until late afternoon when H700 temperatures warm to +10 to +12C,
possibly limiting convective development. As we move deeper into the
extended, the models diverge on timing of another more significant
wave. The Euro lags the GFS in bringing a round of thunderstorms
with the GFS showing another round by Thursday afternoon into Friday
afternoon while the Euro is favoring a Friday into Saturday timing.
Overall, we will continue to warm into the mid to late week with the
warmest day expected to to Thursday as highs reach the mid 80s north
to the lower to mid 90s in the far south. Depending on the timing of
the late week system, we may hold onto another very warm day for
Friday with similar highs expected. The passage of the system will
turn back the dial on temperatures with H850 temperatures lowering
to the low to mid 10s; bringing afternoon highs back to the 70s and
lower 80s with more comfortable levels of humidity for the weekend.

&&

.AVIATION.../For the 00Z TAFS through 00Z Sunday evening/
Issued at 627 PM CDT Sat Jun 24 2023

Scattered convection continues into 02z east of I35 with
secondary development south of I80 and north of US30 aft 04z. As
front sweeps through, west winds increase/gust 30kt with
additional scat storms aft 11z Sunday north third. /rev

&&

.DMX WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

SHORT TERM...REV
LONG TERM...REV
AVIATION...REV

Hazardous weather outlook, Jun 24, 2:36 PM CDT, 8 hours 48 minutes before

Hazardous Weather Outlook
National Weather Service Des Moines IA
236 PM CDT Sat Jun 24 2023

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>086-092>097-251945-
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-Carroll-Greene-
Boone-Story-Marshall-Tama-Audubon-Guthrie-Dallas-Polk-Jasper-
Poweshiek-Cass-Adair-Madison-Warren-Marion-Mahaska-Adams-Union-
Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold-Decatur-Wayne-
Appanoose-Davis-
236 PM CDT Sat Jun 24 2023

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Tonight

Severe thunderstorms will continue into the evening hours east of
I35 over central Iowa. In addition to the risk of lightning, very large
hail, damaging thunderstorm winds, and tornadoes will be
possible.

.DAYS TWO THROUGH SEVEN...Sunday through Saturday

Storm chances will linger Sunday across the northeast half of the
state. These storms appear unlikely to become severe.

Several round of thunderstorms will return to the region later
this week on Wednesday and again for Thursday through Saturday.
The extent in coverage and severe potential will be better
determined in the next several days.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will be needed into this evening.

REV

In the hours before

Local storm report, Jun 24, 8:11 PM CDT, 3 hours 13 minutes before

Preliminary Local Storm Report
National Weather Service Des Moines IA
811 PM CDT Sat Jun 24 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0231 PM     Hail             Indianola               41.36N 93.57W
06/24/2023  E1.75 inch       Warren             IA   Broadcast Media

            Delayed report with time estimated. Via KCCI
            viewer.

&&

Ansorge

Local storm report, Jun 24, 9:34 PM CDT, 1 hour 50 minutes before

Preliminary Local Storm Report
National Weather Service Des Moines IA
934 PM CDT Sat Jun 24 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0928 PM     Hail             5 W Wesley              43.08N 94.09W
06/24/2023  E1.25 inch       Kossuth            IA   Public

            Public report from east of Algona on Highway
            18. Location estimated from radar.

&&

Special weather statement, Jun 24, 10:47 PM CDT, 37 minutes before

Special Weather Statement
National Weather Service Des Moines IA
1047 PM CDT Sat Jun 24 2023

IAZ084-085-095-096-250415-
Appanoose IA-Lucas IA-Wayne IA-Monroe IA-
1047 PM CDT Sat Jun 24 2023

...A strong thunderstorm will impact portions of southeastern Lucas,
southwestern Monroe, northeastern Wayne and northwestern Appanoose
Counties through 1115 PM CDT...

At 1047 PM CDT, Doppler radar was tracking a strong thunderstorm 6
miles west of Rathbun Lake, or 12 miles northeast of Corydon, moving
east at 35 mph.

HAZARD...Winds in excess of 40 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

This strong thunderstorm will be near...
  Rathbun Lake around 1050 PM CDT.

Other locations in the path of this storm include Centerville and
Lake Sundown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4081 9322 4098 9316 4091 9272 4066 9283
TIME...MOT...LOC 0347Z 284DEG 30KT 4085 9311

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH

Jimenez

Local storm report, Jun 24, 10:56 PM CDT, 28 minutes before

Preliminary Local Storm Report
National Weather Service Des Moines IA
1056 PM CDT Sat Jun 24 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1052 PM     Hail             Emmetsburg              43.11N 94.68W
06/24/2023  E1.75 inch       Palo Alto          IA   Law Enforcement

            Law enforcement reports golf ball sized hail
            falling in Emmetsburg.

&&

Local storm report, Jun 24, 11:09 PM CDT, 15 minutes before

Preliminary Local Storm Report
National Weather Service Des Moines IA
1109 PM CDT Sat Jun 24 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1055 PM     Hail             Emmetsburg              43.11N 94.68W
06/24/2023  E2.50 inch       Palo Alto          IA   Law Enforcement

            Law enforcement relayed a report of nearly
            baseball sized hail in Emmetsburg. Delayed
            report. Time estimated.

&&

Local storm report, Jun 24, 11:17 PM CDT, 7 minutes before

Preliminary Local Storm Report
National Weather Service Des Moines IA
1117 PM CDT Sat Jun 24 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1104 PM     Hail             1 N Cylinder            43.10N 94.55W
06/24/2023  E1.75 inch       Palo Alto          IA   Emergency Mngr

            Golf ball size hail intermixed with quarter
            sized hail now north of Cylinder.

&&

BSS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 24, 9:30 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Kossuth, Winnebago	22 min
Jun 24, 10:40 PM CDT	Severe Thunderstorm Warning	DMX	Kossuth, Palo Alto	50 min
Jun 24, 10:47 PM CDT	Special Weather Statement	DMX	Appanoose	28 min
Jun 24, 11:02 PM CDT	Tornado Warning	DMX	Humboldt, Pocahontas	16 min
Jun 24, 11:32 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis	27 min
Jun 25, 12:30 AM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Grundy	45 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2023 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.