Alert archive / Iowa / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 9, NWS Des Moines, IA

March 6, 20175 counties in Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Mar 6, 2017, 4:29 PM CST for 5 counties in Iowa. It was in force for 46 min. 8 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 6, 2017, 4:29 PM CST (22:29 UTC)
Expired
Mar 6, 2017, 5:15 PM CST
In force
46 min
Issued by
NWS Des Moines, IA
Area
Storm-based polygon
Hail
1.75 in
Wind
60.0 mph

Counties Hancock County, IA, Humboldt County, IA, Kossuth County, IA, Webster County, IA, Wright County, IA

The radar

The Des Moines radar (KDMX), 115 km from the middle of the area, began a volume at 22:28 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 6, 4:35 PM CSTHAIL 13 Nw Badger, IAPEA TO QUARTER SIZED HAIL FOR 5 MINUTES. DELAYED REPORT. .
Mar 6, 4:35 PM CSTHAIL 1.5Humboldt, IA.
Mar 6, 4:37 PM CSTHAIL 1.5Humboldt, IA.
Mar 6, 4:38 PM CSTHAIL 1Humboldt, IA.
Mar 6, 4:40 PM CSTHAIL 1.75Humboldt, IAPUBLIC REPORTED GOLF BALL SIZED HAIL IN HUMBOLDT.
Mar 6, 4:40 PM CSTHAIL 2Humboldt, IAPUBLIC REPORT RELAYED BY MEDIA ON TWITTER.
Mar 6, 4:45 PM CSTHAIL 0.753 Wnw Lu Verne, IAPEA TO PENNY SIZED.
Mar 6, 5:00 PM CSTHAIL 13 Wnw Goldfield, IATRAINED SPOTTER REPORTED LOTS OF QUARTER SIZED 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
Mar 6, 1:54 PM CSTTornado WatchSPC8 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.5 hours before the alert went out and 238 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 12:00Z on 2017-03-06Temperature 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, Omaha, NE at 12:00Z on 2017-03-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 437 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
788 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
437 m²/s²
0-3 km storm-relative helicity
464 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

426 
WUUS53 KDMX 062229
SVRDMX
IAC081-091-109-187-197-062315-
/O.NEW.KDMX.SV.W.0009.170306T2229Z-170306T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Des Moines IA
429 PM CST MON MAR 6 2017

The National Weather Service in Des Moines  has issued a

* Severe Thunderstorm Warning for...
  Northwestern Webster County in central Iowa...
  Northwestern Wright County in north central Iowa...
  Southern Kossuth County in north central Iowa...
  Southwestern Hancock County in north central Iowa...
  Humboldt County in north central Iowa...

* Until 515 PM CST.

* At 429 PM CST, a severe thunderstorm was located near Fort Dodge
  Regional Airport, or near Fort Dodge, moving northeast at 80 mph.

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

  SOURCE...Trained weather spotters. 

  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...
  Fort Dodge, Algona, Dakota City, Humboldt, Britt, Fort Dodge
  Regional Airport, Badger, Whittemore, Gilmore City, Wesley,
  Livermore, Corwith, Bode, Lu Verne, Renwick, Barnum, Thor, Clare,
  Rutland and Bradgate.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows!

&&

A tornado watch remains in effect until 1000 PM CST for central and
north central Iowa.

LAT...LON 4244 9416 4248 9443 4309 9442 4310 9375
TIME...MOT...LOC 2229Z 203DEG 68KT 4256 9426 

HAIL...1.75IN
WIND...60MPH
 
$$

MF
2 follow-up statements
857 
WWUS53 KDMX 062253
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
453 PM CST MON MAR 6 2017

IAC187-062302-
/O.CAN.KDMX.SV.W.0009.000000T0000Z-170306T2315Z/
Webster IA-
453 PM CST MON MAR 6 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN WEBSTER 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 1000 PM CST for north central
Iowa.

LAT...LON 4285 9390 4288 9414 4309 9415 4310 9375
TIME...MOT...LOC 2252Z 203DEG 68KT 4297 9402 

$$

IAC081-091-109-197-062315-
/O.CON.KDMX.SV.W.0009.000000T0000Z-170306T2315Z/
Wright IA-Kossuth IA-Hancock IA-Humboldt IA-
453 PM CST MON MAR 6 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CST
FOR NORTHWESTERN WRIGHT...SOUTHEASTERN KOSSUTH...SOUTHWESTERN HANCOCK
AND NORTHEASTERN HUMBOLDT COUNTIES...

At 452 PM CST, a severe thunderstorm was located 12 miles southeast
of Algona, moving northeast at 80 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...
Britt, Wesley, Corwith, Lu Verne, St. Benedict, Sexton and Hutchins. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

A tornado watch remains in effect until 1000 PM CST for north central
Iowa.

LAT...LON 4285 9390 4288 9414 4309 9415 4310 9375
TIME...MOT...LOC 2252Z 203DEG 68KT 4297 9402 

HAIL...1.75IN
WIND...60MPH
 
$$

MF
408 
WWUS53 KDMX 062307
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
507 PM CST MON MAR 6 2017

IAC081-091-109-197-062317-
/O.EXP.KDMX.SV.W.0009.000000T0000Z-170306T2315Z/
Wright IA-Kossuth IA-Hancock IA-Humboldt IA-
507 PM CST MON MAR 6 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN WRIGHT...
SOUTHEASTERN KOSSUTH...SOUTHWESTERN HANCOCK AND NORTHEASTERN HUMBOLDT
COUNTIES WILL EXPIRE AT 515 PM CST...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.

A tornado watch remains in effect until 1000 PM CST for north central
Iowa.

Remember, Severe Thunderstorm Warnings still remain in effect for 
northern Iowa.


LAT...LON 4285 9390 4288 9414 4309 9415 4310 9375
TIME...MOT...LOC 2307Z 203DEG 68KT 4320 9389 

$$

MF

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 6, 4:25 AM CSTWind AdvisoryDMXAdair, Adams, Appanoose, Audubon, Black Hawk, Boone and 41 more24 hr
Mar 6, 3:28 PM CSTFire Weather WatchDMXBlack Hawk, Boone, Bremer, Butler, Calhoun, Carroll and 27 more13 hr
Mar 6, 3:29 PM CSTWind AdvisoryDMXAdair, Adams, Appanoose, Audubon, Black Hawk, Boone and 45 more27 hr
Mar 6, 3:40 PM CSTSevere Thunderstorm WarningDMXAudubon, Carroll, Greene, Guthrie50 min
Mar 6, 3:50 PM CSTSevere Thunderstorm WarningDMXCalhoun, Crawford, Sac55 min
Mar 6, 4:04 PM CSTSevere Thunderstorm WarningDMXEmmet, Kossuth, Palo Alto, Pocahontas41 min
Mar 6, 4:13 PM CSTSevere Thunderstorm WarningDMXCalhoun, Pocahontas, Webster47 min
Mar 6, 4:13 PM CSTTornado WarningDMXEmmet, Kossuth, Palo Alto33 min
Mar 6, 4:19 PM CSTSevere Thunderstorm WarningDMXCalhoun, Carroll, Crawford, Sac41 min
Mar 6, 4:31 PM CSTSevere Thunderstorm WarningDMXAudubon, Calhoun, Carroll, Greene44 min
Mar 6, 4:41 PM CSTSevere Thunderstorm WarningDMXHamilton, Humboldt, Webster, Wright49 min
Mar 6, 4:43 PM CSTSevere Thunderstorm WarningDMXKossuth, Palo Alto18 min
Mar 6, 4:47 PM CSTSevere Thunderstorm WarningDMXKossuth, Winnebago33 min
Mar 6, 4:58 PM CSTSevere Thunderstorm WarningDMXHancock, Humboldt, Kossuth, Webster, Winnebago, Wright47 min
Mar 6, 5:00 PM CSTSevere Thunderstorm WarningDMXCalhoun, Humboldt, Kossuth, Pocahontas, Webster45 min
Mar 6, 5:07 PM CSTSevere Thunderstorm WarningDMXAdair, Audubon, Cass, Greene, Guthrie68 min
Mar 6, 5:10 PM CSTSevere Thunderstorm WarningDMXBoone, Calhoun, Greene, Webster50 min
Mar 6, 5:29 PM CSTTornado WarningDMXHamilton, Webster31 min
Mar 6, 5:37 PM CSTSevere Thunderstorm WarningDMXFranklin, Hamilton, Hardin, Humboldt, Webster, Wright38 min
Mar 6, 5:53 PM CSTSevere Thunderstorm WarningDMXAdams, Cass, Ringgold, Taylor, Union52 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2017Every severe thunderstorm warning in 2017

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.