Tornado Warning 26, NWS Des Moines, IA

Issued

Jun 20, 2018, 3:57 PM CDT (20:57 UTC)

Expired

Jun 20, 2018, 4:30 PM CDT

In force

33 min

Issued by

NWS Des Moines, IA

Area

Storm-based polygon

Tornado

Radar indicated

Hail

0.75 in

Counties Grundy County, IA, Hardin County, IA

The Des Moines radar (KDMX), 102 km from the middle of the area, began a volume at 20:57 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.

459 
WFUS53 KDMX 202057
TORDMX
IAC075-083-202130-
/O.NEW.KDMX.TO.W.0026.180620T2057Z-180620T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Des Moines IA
357 PM CDT WED JUN 20 2018

The National Weather Service in Des Moines  has issued a

* Tornado Warning for...
  Northeastern Hardin County in central Iowa...
  Northwestern Grundy County in central Iowa...

* Until 430 PM CDT.
    
* At 357 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 7 miles south of Ackley, or 8 miles northeast of
  Eldora, moving north 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
  northeastern Hardin and northwestern Grundy Counties, including the
  following locations... Ackley Municipal Airport.

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 4240 9296 4240 9304 4255 9303 4255 9288
TIME...MOT...LOC 2057Z 195DEG 10KT 4245 9300 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

REV

499 
WWUS53 KDMX 202111
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
411 PM CDT WED JUN 20 2018

IAC075-083-202130-
/O.CON.KDMX.TO.W.0026.000000T0000Z-180620T2130Z/
Hardin IA-Grundy IA-
411 PM CDT WED JUN 20 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 PM CDT FOR
NORTHEASTERN HARDIN AND NORTHWESTERN GRUNDY COUNTIES...
    
At 411 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Ackley, or 10 miles northeast of Eldora, moving
north 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.

Locations impacted include...
Ackley Municipal Airport.

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 4247 9293 4246 9304 4255 9303 4255 9288
TIME...MOT...LOC 2111Z 195DEG 10KT 4249 9299 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

REV

349 
WWUS53 KDMX 202125
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
425 PM CDT WED JUN 20 2018

IAC075-083-202134-
/O.EXP.KDMX.TO.W.0026.000000T0000Z-180620T2130Z/
Hardin IA-Grundy IA-
425 PM CDT WED JUN 20 2018

...THE TORNADO WARNING FOR NORTHEASTERN HARDIN AND NORTHWESTERN
GRUNDY COUNTIES WILL EXPIRE AT 430 PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

A Tornado Watch remains in effect until 700 PM CDT for central Iowa.

LAT...LON 4247 9293 4246 9304 4255 9303 4255 9288
TIME...MOT...LOC 2124Z 195DEG 10KT 4253 9298 

$$

REV

Tornado Warnings in Iowa, 2018Every tornado warning in 2018Tornadoes in 2018

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.