Alert archive / Iowa / Tornado Warnings in 2015

Tornado Warning 14, NWS Des Moines, IA

June 22, 2015Davis County, Iowa

NWS Des Moines, IA issued this tornado warning at Jun 22, 2015, 7:03 PM CDT for Davis 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: Jun 22, 2015, 7:03 PM CDT (00:03 UTC)
Expired: Jun 22, 2015, 7:30 PM CDT
In force: 27 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Davis County, IA

The radar

The Des Moines radar (KDMX), 164 km from the middle of the area, began a volume at 00:04 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 22, 3:56 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 0.1 hours before the alert went out and 190 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: 1958 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 925 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 401 m²/s²
0-3 km storm-relative helicity: 441 m²/s²
Significant tornado parameter: 5.7
Supercell composite: 17.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

848 
WFUS53 KDMX 230003
TORDMX
IAC051-230030-
/O.NEW.KDMX.TO.W.0014.150623T0003Z-150623T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
703 PM CDT MON JUN 22 2015

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN DAVIS COUNTY IN SOUTHEASTERN IOWA...

* UNTIL 730 PM CDT
    
* AT 703 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 5 MILES SOUTH OF BLOOMFIELD...MOVING SOUTHEAST
  AT 35 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
  SOUTHEASTERN DAVIS 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 4068 9245 4073 9237 4060 9218 4060 9240
TIME...MOT...LOC 0003Z 325DEG 28KT 4068 9239 

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

$$

COGIL

2 follow-up statements

980 
WWUS53 KDMX 230018
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
718 PM CDT MON JUN 22 2015

IAC051-230030-
/O.CON.KDMX.TO.W.0014.000000T0000Z-150623T0030Z/
DAVIS IA-
718 PM CDT MON JUN 22 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR
SOUTHEASTERN DAVIS COUNTY...
    
AT 717 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED 6 MILES SOUTHWEST OF MILTON...OR 11 MILES NORTHWEST OF
MEMPHIS...MOVING SOUTHEAST AT 25 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
SOUTHEASTERN DAVIS 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 4068 9245 4073 9237 4060 9218 4060 9240
TIME...MOT...LOC 0017Z 314DEG 22KT 4061 9226 

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

$$

COGIL

509 
WWUS53 KDMX 230023
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
723 PM CDT MON JUN 22 2015

IAC051-230032-
/O.EXP.KDMX.TO.W.0014.000000T0000Z-150623T0030Z/
DAVIS IA-
723 PM CDT MON JUN 22 2015

...THE TORNADO WARNING FOR SOUTHEASTERN DAVIS COUNTY WILL EXPIRE AT
730 PM CDT...
    
THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS
BEEN CANCELLED. HOWEVER...LARGE HAIL AND DAMAGING WINDS REMAIN LIKELY
AND A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR THE AREA.


A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT FOR SOUTHEASTERN
IOWA.

LAT...LON 4068 9245 4073 9237 4060 9218 4060 9240
TIME...MOT...LOC 0020Z 325DEG 28KT 4061 9226 

$$

COGIL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 22, 7:13 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis	32 min
Jun 22, 7:16 PM CDT	Flash Flood Warning	DMX	Appanoose, Davis	6 hr
Jun 23, 10:15 AM CDT	River Flood Warning	DMX	Black Hawk	4 days
Jun 23, 3:59 PM CDT	Flash Flood Watch	DMX	Adair, Appanoose, Audubon, Black Hawk, Boone, Bremer and 30 more	38 hr

Nearby

Tornado Warnings in Iowa, 2015 Every tornado warning in 2015 Tornadoes in 2015

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.