Alert archive / Iowa / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 21, NWS Quad Cities, IA

March 4, 2024Des Moines County, Henry County, Louisa County, Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Mar 4, 2024, 3:52 PM CST for Des Moines County, Henry County, Louisa County, Iowa. It was in force for 38 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 4, 2024, 3:52 PM CST (21:52 UTC)
Expired: Mar 4, 2024, 4:30 PM CST
In force: 38 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Possible
Damage threat: Considerable
Hail: 1.75 in
Wind: 60.0 mph

Counties Des Moines County, IA, Henry County, IA, Louisa County, IA

The radar

The Quad Cities radar (KDVN), 102 km from the middle of the area, began a volume at 21:52 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

Time	Report	Where	Remark
Mar 4, 4:16 PM CST	HAIL 0.75	4 Nne New London, IA	Report from mPING: Dime (0.75 in.).
Mar 4, 4:18 PM CST	HAIL 1	3 W Pleasant Grove, IA	Delayed report, lasted 5-10 min with 30 mph winds. Time estimated from radar.

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

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 9.9 hours before the alert went out and 107 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1669 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 126 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

203 
WUUS53 KDVN 042152 RRA
SVRDVN
IAC057-087-115-042230-
/O.NEW.KDVN.SV.W.0021.240304T2152Z-240304T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Quad Cities IA/IL
352 PM CST Mon Mar 4 2024

The National Weather Service in the Quad Cities has issued a

* Severe Thunderstorm Warning for...
  Southern Henry County in southeastern Iowa...
  Northwestern Des Moines County in southeastern Iowa...
  South central Louisa County in southeastern Iowa...

* Until 430 PM CST.

* At 352 PM CST, a severe thunderstorm was located over Henry County
  Fairgrounds, or over Mount Pleasant, moving northeast at 30 mph.

  HAZARD...Golf ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* Locations impacted include...
  Mount Pleasant, New London, Mediapolis, Morning Sun, Westwood,
  Mount Union, Henry County Fairgrounds, Oakland Mills, Oakland Mills
  Park, Mount Pleasant Municipal Arpt, Big Hollow Recreation Area,
  Water Works Park, Pleasant Grove, Dodgeville, Marsh, Garland, and
  Yarmouth.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to shelter inside a strong building, and stay away from windows.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4084 9153 4097 9166 4114 9126 4096 9114
TIME...MOT...LOC 2152Z 240DEG 26KT 4092 9156 

TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Gibbs

2 follow-up statements

120 
WWUS53 KDVN 042201
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
401 PM CST Mon Mar 4 2024

IAC057-087-115-042230-
/O.CON.KDVN.SV.W.0021.000000T0000Z-240304T2230Z/
Henry IA-Des Moines IA-Louisa IA-
401 PM CST Mon Mar 4 2024

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM CST
FOR SOUTHEASTERN HENRY...NORTHWESTERN DES MOINES AND SOUTH CENTRAL
LOUISA COUNTIES...

At 401 PM CST, a severe thunderstorm was located over Mount Pleasant
Municipal Arpt, or near Mount Pleasant, moving northeast at 30 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.

Locations impacted include...
Mount Pleasant, New London, Mediapolis, Morning Sun, Mount Union,
Henry County Fairgrounds, Mount Pleasant Municipal Arpt, Big Hollow
Recreation Area, Pleasant Grove, Dodgeville, Marsh, Garland, and
Yarmouth.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to a shelter, inside a strong building and away from windows.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4086 9150 4099 9160 4114 9126 4096 9114
TIME...MOT...LOC 2201Z 240DEG 26KT 4095 9148 

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

$$

Gibbs

017 
WWUS53 KDVN 042214
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
414 PM CST Mon Mar 4 2024

IAC057-087-115-042230-
/O.CON.KDVN.SV.W.0021.000000T0000Z-240304T2230Z/
Henry IA-Des Moines IA-Louisa IA-
414 PM CST Mon Mar 4 2024

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM CST
FOR EAST CENTRAL HENRY...NORTHWESTERN DES MOINES AND SOUTH CENTRAL
LOUISA COUNTIES...

At 414 PM CST, a severe thunderstorm was located near Yarmouth, or 9
miles east of Mount Pleasant, moving northeast at 30 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
New London, Mediapolis, Morning Sun, Mount Union, Big Hollow
Recreation Area, Pleasant Grove, Dodgeville, Garland, and Yarmouth.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to a shelter, inside a strong building and away from windows.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4090 9139 4103 9149 4114 9126 4096 9114
TIME...MOT...LOC 2214Z 240DEG 26KT 4100 9137 

TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Gibbs

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 4, 8:01 AM CST	Special Weather Statement	DVN	Buchanan	29 min
Mar 4, 10:10 AM CST	Special Weather Statement	DVN	Washington	35 min
Mar 4, 10:49 AM CST	Special Weather Statement	DVN	Muscatine	26 min
Mar 4, 11:12 AM CST	Special Weather Statement	DVN	Cedar	33 min
Mar 4, 12:38 PM CST	Special Weather Statement	DVN	Clinton	37 min
Mar 4, 1:11 PM CST	Severe Thunderstorm Warning	DVN	Jackson	34 min
Mar 4, 1:48 PM CST	Special Weather Statement	DVN	Clinton	42 min
Mar 4, 1:54 PM CST	Severe Thunderstorm Warning	DVN	Clinton, Jackson, Scott	51 min
Mar 4, 2:43 PM CST	Severe Thunderstorm Warning	DVN	Clinton, Scott	47 min
Mar 4, 3:11 PM CST	Special Weather Statement	DVN	Van Buren	49 min
Mar 4, 3:19 PM CST	Severe Thunderstorm Warning	DVN	Henry, Jefferson, Lee, Van Buren	41 min
Mar 4, 3:28 PM CST	Severe Thunderstorm Warning	DVN	Lee, Van Buren	47 min
Mar 4, 3:39 PM CST	Severe Thunderstorm Warning	DVN	Scott	51 min
Mar 4, 3:52 PM CST	Severe Thunderstorm Warning	DVN	Clinton, Scott	38 min
Mar 4, 4:17 PM CST	Severe Thunderstorm Warning	DVN	Scott	43 min
Mar 4, 4:24 PM CST	Severe Thunderstorm Warning	DVN	Des Moines, Louisa	35 min
Mar 4, 5:11 PM CST	Severe Thunderstorm Warning	DVN	Van Buren	49 min
Mar 4, 5:16 PM CST	Tornado Warning	DVN	Van Buren	33 min
Mar 4, 5:22 PM CST	Severe Thunderstorm Warning	DVN	Des Moines	38 min
Mar 4, 5:48 PM CST	Severe Thunderstorm Warning	DVN	Lee	42 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2024 Every severe thunderstorm warning in 2024

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.