Tornado Warning 18, NWS Des Moines, IA

Issued

Jun 20, 2018, 2:22 PM CDT (19:22 UTC)

Expired

Jun 20, 2018, 2:47 PM CDT

In force

25 min

Issued by

NWS Des Moines, IA

Area

Storm-based polygon

Tornado

Radar indicated

Hail

0.75 in

Counties Boone County, IA, Dallas County, IA, Greene County, IA

The Des Moines radar (KDMX), 36 km from the middle of the area, began a volume at 19:23 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.

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

052 
WFUS53 KDMX 201922
TORDMX
IAC015-049-073-202000-
/O.NEW.KDMX.TO.W.0018.180620T1922Z-180620T2000Z/

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

The National Weather Service in Des Moines  has issued a

* Tornado Warning for...
  Southeastern Greene County in west central Iowa...
  Southwestern Boone County in central Iowa...
  North central Dallas County in central Iowa...

* Until 300 PM CDT.
    
* At 221 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Perry, 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 dangerous storm will be near...
  Perry around 235 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Rippey, Perry Municipal Airport and Berkley.

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 4178 9412 4182 9421 4196 9420 4192 9401
TIME...MOT...LOC 1921Z 211DEG 10KT 4184 9415 

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

$$

Donavon

766 
WWUS53 KDMX 201932
SVSDMX

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

IAC015-049-073-202000-
/O.CON.KDMX.TO.W.0018.000000T0000Z-180620T2000Z/
Greene IA-Boone IA-Dallas IA-
232 PM CDT WED JUN 20 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 300 PM CDT FOR
SOUTHEASTERN GREENE...SOUTHWESTERN BOONE AND NORTH CENTRAL DALLAS
COUNTIES...
    
At 232 PM CDT, a confirmed tornado was located just north of Perry, 
moving northeast at 15 mph.

HAZARD...Damaging tornado.

SOURCE...Weather spotters confirmed tornado.

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
southeastern Greene...southwestern Boone and north central Dallas
Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. 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 4182 9411 4185 9420 4195 9419 4192 9401
TIME...MOT...LOC 1932Z 204DEG 14KT 4189 9413 

TORNADO...OBSERVED
HAIL...<.75IN

$$

Donavon

584 
WWUS53 KDMX 201947
SVSDMX

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

IAC015-049-073-201957-
/O.CAN.KDMX.TO.W.0018.000000T0000Z-180620T2000Z/
Greene IA-Boone IA-Dallas IA-
247 PM CDT WED JUN 20 2018

...THE TORNADO WARNING FOR SOUTHEASTERN GREENE...SOUTHWESTERN BOONE
AND NORTH CENTRAL DALLAS COUNTIES IS CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.

LAT...LON 4182 9411 4185 9420 4195 9419 4192 9401
TIME...MOT...LOC 1945Z 211DEG 10KT 4193 9410 

$$

Donavon

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.