Alert archive / Iowa / Tornado Warnings in 2020

Tornado Warning 1, NWS Des Moines, IA

March 28, 2020Adair County, Guthrie County, Madison County, Iowa

NWS Des Moines, IA issued this tornado warning at Mar 28, 2020, 2:24 PM CDT for Adair County, Guthrie County, Madison County, Iowa. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Mar 28, 2020, 2:24 PM CDT (19:24 UTC)
Expired: Mar 28, 2020, 2:51 PM CDT
In force: 27 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Tornado: Observed
Hail: 1.0 in

Counties Adair County, IA, Guthrie County, IA, Madison County, IA

The radar

The Des Moines radar (KDMX), 74 km from the middle of the area, began a volume at 19:27 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.

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 7.4 hours before the alert went out and 158 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 636 m above ground
0-6 km bulk shear: 81 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

263 
WFUS53 KDMX 281924
TORDMX
IAC001-077-121-282000-
/O.NEW.KDMX.TO.W.0001.200328T1924Z-200328T2000Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Des Moines IA
224 PM CDT Sat Mar 28 2020

The National Weather Service in Des Moines  has issued a

* Tornado Warning for...
  Northwestern Madison County in south central Iowa...
  South central Guthrie County in west central Iowa...
  Northeastern Adair County in southwestern Iowa...

* Until 300 PM CDT.

* At 224 PM CDT, a confirmed tornado was located near Greenfield,
  moving northeast at 35 mph.

  HAZARD...Damaging tornado and quarter size hail.

  SOURCE...Law enforcement 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.

* The tornado will be near...
  Stuart around 250 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Fontanelle and Menlo.

This includes Interstate 80 between mile markers 85 and 96.
 
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 4126 9454 4128 9460 4156 9445 4150 9424
TIME...MOT...LOC 1924Z 210DEG 32KT 4132 9454 

TORNADO...OBSERVED
HAIL...1.00IN

$$

Kotenberg

3 follow-up statements

301 
WWUS53 KDMX 281934
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
234 PM CDT Sat Mar 28 2020

IAC001-077-121-282000-
/O.CON.KDMX.TO.W.0001.000000T0000Z-200328T2000Z/
Madison IA-Guthrie IA-Adair IA-
234 PM CDT Sat Mar 28 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 300 PM CDT FOR
NORTHWESTERN MADISON...SOUTH CENTRAL GUTHRIE AND NORTHEASTERN ADAIR
COUNTIES...
    
At 234 PM CDT, a confirmed tornado was located 8 miles north of
Greenfield, moving northeast at 45 mph.

HAZARD...Damaging tornado and quarter size hail.

SOURCE...Law enforcement 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 tornado will be near...
  Stuart around 245 PM CDT.

Other locations impacted by this tornadic thunderstorm include Menlo.

This includes Interstate 80 between mile markers 85 and 96.
 
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 4136 9442 4140 9454 4156 9445 4150 9424
TIME...MOT...LOC 1934Z 204DEG 37KT 4143 9449 

TORNADO...OBSERVED
HAIL...1.00IN

$$

Kotenberg

353 
WWUS53 KDMX 281945
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
245 PM CDT Sat Mar 28 2020

IAC121-281955-
/O.CAN.KDMX.TO.W.0001.000000T0000Z-200328T2000Z/
Madison IA-
245 PM CDT Sat Mar 28 2020

...THE TORNADO WARNING FOR NORTHWESTERN MADISON COUNTY IS
CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

LAT...LON 4144 9432 4149 9449 4156 9445 4150 9425
      4146 9429
TIME...MOT...LOC 1945Z 210DEG 32KT 4152 9442 

$$

IAC001-077-282000-
/O.CON.KDMX.TO.W.0001.000000T0000Z-200328T2000Z/
Guthrie IA-Adair IA-
245 PM CDT Sat Mar 28 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 300 PM CDT FOR SOUTH
CENTRAL GUTHRIE AND NORTHEASTERN ADAIR COUNTIES...
    
At 245 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Stuart, or 11 miles south of Guthrie Center, moving
northeast at 35 mph.

HAZARD...Tornado and quarter size hail.

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
south central Guthrie and northeastern Adair Counties, including the
following locations... Menlo.

This includes Interstate 80 between mile markers 84 and 95.
 
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 4144 9432 4149 9449 4156 9445 4150 9425
      4146 9429
TIME...MOT...LOC 1945Z 210DEG 32KT 4152 9442 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

Kotenberg

663 
WWUS53 KDMX 281951
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
251 PM CDT Sat Mar 28 2020

IAC001-077-281959-
/O.CAN.KDMX.TO.W.0001.000000T0000Z-200328T2000Z/
Guthrie IA-Adair IA-
251 PM CDT Sat Mar 28 2020

...THE TORNADO WARNING FOR SOUTH CENTRAL GUTHRIE AND NORTHEASTERN
ADAIR 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 4144 9432 4149 9449 4156 9445 4150 9425
      4146 9429
TIME...MOT...LOC 1949Z 210DEG 32KT 4156 9439 

$$

Kotenberg

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 28, 1:07 AM CDT	Severe Thunderstorm Warning	DMX	Monroe, Wapello	23 min
Mar 28, 2:18 AM CDT	Dense Fog Advisory	DMX	Adair, Adams, Appanoose, Boone, Clarke, Dallas and 21 more	7 min
Mar 28, 2:28 AM CDT	Dense Fog Advisory	DMX	Adair, Adams, Appanoose, Boone, Clarke, Dallas and 21 more	9 hr
Mar 28, 2:59 AM CDT	Wind Advisory	DMX	Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 45 more	34 hr
Mar 28, 4:56 AM CDT	Special Weather Statement	DMX	Mahaska	19 min
Mar 28, 9:55 AM CDT	River Flood Warning	DMX	Davis, Wapello	12 hr
Mar 28, 10:29 AM CDT	Special Weather Statement	DMX	Marion	46 min
Mar 28, 10:35 AM CDT	Special Weather Statement	DMX	Mahaska	40 min
Mar 28, 1:31 PM CDT	Special Weather Statement	DMX	Adams	44 min
Mar 28, 2:01 PM CDT	Special Weather Statement	DMX	Adair	44 min
Mar 28, 3:49 PM CDT	Special Weather Statement	DMX	Hamilton, Wright	41 min
Mar 28, 3:51 PM CDT	Special Weather Statement	DMX	Hancock	39 min
Mar 28, 4:08 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Franklin, Hamilton, Hancock, Wright	31 min
Mar 28, 4:10 PM CDT	Tornado Warning	DMX	Jasper, Marshall, Story	35 min
Mar 28, 4:38 PM CDT	Special Weather Statement	DMX	Hancock, Winnebago	37 min
Mar 28, 4:38 PM CDT	Tornado Warning	DMX	Marshall	22 min
Mar 28, 5:22 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Pocahontas, Webster	38 min
Mar 28, 5:54 PM CDT	Tornado Warning	DMX	Black Hawk	17 min
Mar 28, 6:02 PM CDT	Tornado Warning	DMX	Black Hawk	9 min

Nearby

Tornado Warnings in Iowa, 2020 Every tornado warning in 2020 Tornadoes in 2020

Sources

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.