Alert archive / Iowa / Tornado Warnings in 2019

Tornado Warning 13, NWS Des Moines, IA

May 29, 2019Grundy County, Hardin County, Iowa

NWS Des Moines, IA issued this tornado warning at May 29, 2019, 8:20 PM CDT for Grundy County, Hardin County, Iowa. It was in force for 40 min. 1 report 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 29, 2019, 8:20 PM CDT (01:20 UTC)
Expired: May 29, 2019, 9:00 PM CDT
In force: 40 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

Counties Grundy County, IA, Hardin County, IA

The radar

The Des Moines radar (KDMX), 88 km from the middle of the area, began a volume at 01:24 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
May 29, 8:30 PM CDT	FUNNEL CLOUD	3 N Whitten, IA

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 00:00Z, 1.3 hours before the alert went out and 217 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: 614 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 778 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 167 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.3

Open this sounding in Storm Lab

The text

As transmitted.

007 
WFUS53 KDMX 300120
TORDMX
IAC075-083-300200-
/O.NEW.KDMX.TO.W.0013.190530T0120Z-190530T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Des Moines IA
820 PM CDT Wed May 29 2019

The National Weather Service in Des Moines  has issued a

* Tornado Warning for...
  East central Hardin County in central Iowa...
  Southwestern Grundy County in central Iowa...

* Until 900 PM CDT.

* At 817 PM CDT, a severe thunderstorm capable of producing a 
  tornado was located 7 miles southeast of Eldora, or just northeast 
  of Whitten, moving northeast at 10 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation. Law enforcement reported 
           rotation near the Grundy-Hardin County line near Highway 
           20.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This tornadic thunderstorm will remain over mainly rural areas of
  east central Hardin and southwestern Grundy Counties, including the
  following locations... Whitten.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4222 9297 4229 9306 4241 9299 4231 9283
TIME...MOT...LOC 0119Z 223DEG 10KT 4229 9300 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

Ansorge

1 follow-up statement

802 
WWUS53 KDMX 300132
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
832 PM CDT Wed May 29 2019

IAC083-300141-
/O.CAN.KDMX.TO.W.0013.000000T0000Z-190530T0200Z/
Hardin IA-
832 PM CDT Wed May 29 2019

...THE TORNADO WARNING FOR EAST CENTRAL HARDIN COUNTY IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled. A 
Tornado Warning continues for the central part of Hardin County 
including Eldora until 845pm.

LAT...LON 4226 9298 4228 9300 4239 9300 4241 9299
      4233 9286
TIME...MOT...LOC 0131Z 223DEG 10KT 4232 9297 

$$

IAC075-300200-
/O.CON.KDMX.TO.W.0013.000000T0000Z-190530T0200Z/
Grundy IA-
832 PM CDT Wed May 29 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 PM CDT FOR WEST
CENTRAL GRUNDY COUNTY...
    
At 831 PM CDT, a severe thunderstorm capable of producing a tornado
was located 7 miles southeast of Eldora, moving northeast at 10 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This tornadic thunderstorm will remain over mainly rural areas of
west central Grundy County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4226 9298 4228 9300 4239 9300 4241 9299
      4233 9286
TIME...MOT...LOC 0131Z 223DEG 10KT 4232 9297 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

Ansorge

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 7:06 PM CDT	Tornado Warning Tornado observed	DMX	Poweshiek	24 min
May 29, 7:28 PM CDT	Tornado Warning	DMX	Poweshiek	17 min
May 29, 7:45 PM CDT	Tornado Warning	DMX	Wright	30 min
May 29, 7:48 PM CDT	Tornado Warning Tornado observed	DMX	Hardin	27 min
May 29, 7:53 PM CDT	Tornado Warning	DMX	Grundy, Hardin, Marshall	37 min
May 29, 8:02 PM CDT	Tornado Warning	DMX	Cerro Gordo, Franklin, Hancock, Wright	28 min
May 29, 8:29 PM CDT	Tornado Warning	DMX	Hardin	16 min
May 29, 8:42 PM CDT	Tornado Warning Tornado observed	DMX	Franklin, Grundy, Hardin	48 min
May 29, 9:13 PM CDT	Tornado Warning Tornado observed	DMX	Butler, Franklin	32 min
May 29, 10:22 PM CDT	Special Weather Statement	DMX	Bremer	53 min
May 29, 10:30 PM CDT	Severe Thunderstorm Warning	DMX	Bremer	30 min

Nearby

Tornado Warnings in Iowa, 2019 Every tornado warning in 2019 Tornadoes 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.