Alert archive / Iowa / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 21, NWS Des Moines, IA

May 16, 20194 counties in Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at May 16, 2019, 8:09 PM CDT for 4 counties in Iowa. It was in force for 42 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
May 16, 2019, 8:09 PM CDT (01:09 UTC)
Expired
May 16, 2019, 8:51 PM CDT
In force
42 min
Issued by
NWS Des Moines, IA
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

Counties Audubon County, IA, Carroll County, IA, Greene County, IA, Guthrie County, IA

The radar

The Des Moines radar (KDMX), 77 km from the middle of the area, began a volume at 01:12 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
May 16, 8:10 PM CDTHAIL 15 Ese Gray, IATRAINED SPOTTER REPORTED NICKEL TO QUARTER SIZED HAIL.
May 16, 8:12 PM CDTHAIL 16 S Dedham, IATRAINED SPOTTER ALONG PHEASANT AVE REPORTED UP TO QUARTER HAIL.

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
May 16, 7:57 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 1.2 hours before the alert went out and 154 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, Omaha, NE at 00:00Z on 2019-05-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1546 joules per kilogram.LCLLFCEL10008507005003002001001 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, Omaha, NE at 00:00Z on 2019-05-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 49 square meters per square second.193958Sfc1 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
1546 J/kg
Mixed-layer CIN
-52 J/kg
Mixed-layer LCL
2631 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
49 m²/s²
0-3 km storm-relative helicity
85 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.2

Open this sounding in Storm Lab

The text

As transmitted.

890 
WUUS53 KDMX 170109
SVRDMX
IAC009-027-073-077-170215-
/O.NEW.KDMX.SV.W.0021.190517T0109Z-190517T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Des Moines IA
809 PM CDT Thu May 16 2019

The National Weather Service in Des Moines  has issued a

* Severe Thunderstorm Warning for...
  Southwestern Greene County in west central Iowa...
  Northern Guthrie County in west central Iowa...
  Northeastern Audubon County in west central Iowa...
  Southeastern Carroll County in west central Iowa...

* Until 915 PM CDT.

* At 809 PM CDT, a severe thunderstorm was located 8 miles southwest
  of Coon Rapids, or 8 miles northeast of Audubon, moving east at 15
  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...
  Coon Rapids, Panora, Lake Panorama, Bayard, Bagley, Dedham, Yale,
  Jamaica, Springbrook State Park and Lakin Slough Game Management
  Area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4191 9486 4186 9428 4166 9428 4179 9494
TIME...MOT...LOC 0109Z 285DEG 14KT 4182 9482 

HAIL...1.25IN
WIND...60MPH
 
$$

Curtis
2 follow-up statements
474 
WWUS53 KDMX 170136
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
836 PM CDT Thu May 16 2019

IAC027-073-170145-
/O.CAN.KDMX.SV.W.0021.000000T0000Z-190517T0215Z/
Greene IA-Carroll IA-
836 PM CDT Thu May 16 2019

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN GREENE AND
SOUTHEASTERN CARROLL COUNTIES 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
central and west central Iowa.

LAT...LON 4185 9478 4186 9456 4182 9428 4166 9428
      4179 9494
TIME...MOT...LOC 0135Z 295DEG 18KT 4175 9465 

$$

IAC009-077-170215-
/O.CON.KDMX.SV.W.0021.000000T0000Z-190517T0215Z/
Guthrie IA-Audubon IA-
836 PM CDT Thu May 16 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR NORTHERN GUTHRIE AND NORTHEASTERN AUDUBON COUNTIES...

At 835 PM CDT, a severe thunderstorm was located 8 miles south of
Coon Rapids, or 9 miles northwest of Guthrie Center, moving southeast
at 20 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...
Panora, Lake Panorama, Bayard, Yale, Springbrook State Park and Lakin
Slough Game Management Area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4185 9478 4186 9456 4182 9428 4166 9428
      4179 9494
TIME...MOT...LOC 0135Z 295DEG 18KT 4175 9465 

HAIL...1.00IN
WIND...60MPH
 
$$

Fowle
088 
WWUS53 KDMX 170151
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
851 PM CDT Thu May 16 2019

IAC009-077-170200-
/O.CAN.KDMX.SV.W.0021.000000T0000Z-190517T0215Z/
Guthrie IA-Audubon IA-
851 PM CDT Thu May 16 2019

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN GUTHRIE AND
NORTHEASTERN AUDUBON COUNTIES IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

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

Remember, a separate Severe Thunderstorm Warning still remains in 
effect for portions of central Guthrie and Audubon Counties.

LAT...LON 4185 9478 4186 9456 4182 9428 4166 9428
      4179 9494
TIME...MOT...LOC 0149Z 285DEG 14KT 4173 9457 

$$

Fowle

The office that day

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

IssuedProductOfficeCountiesLasted
May 16, 7:15 PM CDTSevere Thunderstorm WarningDMXHardin, Marshall, Story45 min
May 16, 7:21 PM CDTSevere Thunderstorm WarningDMXMarshall, Story54 min
May 16, 7:31 PM CDTSevere Thunderstorm WarningDMXJasper, Polk44 min
May 16, 7:39 PM CDTSevere Thunderstorm WarningDMXPoweshiek, Tama66 min
May 16, 7:42 PM CDTSevere Thunderstorm WarningDMXAudubon, Carroll, Guthrie63 min
May 16, 7:46 PM CDTSevere Thunderstorm WarningDMXDallas, Polk44 min
May 16, 7:53 PM CDTSevere Thunderstorm WarningDMXJasper, Marshall37 min
May 16, 8:02 PM CDTSevere Thunderstorm WarningDMXJasper, Poweshiek58 min
May 16, 8:04 PM CDTSevere Thunderstorm WarningDMXTama32 min
May 16, 8:16 PM CDTSevere Thunderstorm WarningDMXJasper, Marion, Polk44 min
May 16, 8:22 PM CDTSevere Thunderstorm WarningDMXDallas, Polk53 min
May 16, 8:23 PM CDTSevere Thunderstorm WarningDMXPoweshiek37 min
May 16, 8:31 PM CDTSevere Thunderstorm WarningDMXAudubon, Guthrie59 min
May 16, 8:58 PM CDTSevere Thunderstorm WarningDMXJasper, Poweshiek37 min
May 16, 9:02 PM CDTSpecial Weather StatementDMXJasper, Polk58 min
May 16, 9:15 PM CDTSevere Thunderstorm WarningDMXDallas, Madison, Polk, Warren60 min
May 16, 9:44 PM CDTSevere Thunderstorm WarningDMXMahaska46 min
May 16, 10:07 PM CDTSevere Thunderstorm WarningDMXMarion, Warren38 min
May 16, 10:32 PM CDTSevere Thunderstorm WarningDMXMahaska, Marion, Monroe, Wapello43 min
May 17, 10:35 AM CDTRiver Flood WarningDMXDavis, Wapello16 hr
May 17, 4:04 PM CDTSpecial Weather StatementDMXMarshall, Tama41 min
May 17, 4:39 PM CDTSpecial Weather StatementDMXMarshall51 min
May 17, 4:57 PM CDTSpecial Weather StatementDMXMarshall33 min
May 17, 5:13 PM CDTSevere Thunderstorm WarningDMXGrundy, Hardin, Marshall32 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2019Every severe thunderstorm warning in 2019

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.