Alert archive / Iowa / Tornado Warnings in 2014

Tornado Warning 2, NWS Des Moines, IA

May 8, 2014Carroll County, Greene County, Iowa

NWS Des Moines, IA issued this tornado warning at May 8, 2014, 4:57 PM CDT for Carroll County, Greene County, Iowa. It was in force for 33 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: May 8, 2014, 4:57 PM CDT (21:57 UTC)
Expired: May 8, 2014, 5:30 PM CDT
In force: 33 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Carroll County, IA, Greene County, IA

The radar

The Des Moines radar (KDMX), 89 km from the middle of the area, began a volume at 21:58 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
May 8, 1:46 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.0 hours before the alert went out and 167 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: 896 J/kg
Mixed-layer CIN: -173 J/kg
Mixed-layer LCL: 1030 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 217 m²/s²
0-3 km storm-relative helicity: 264 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.9

Open this sounding in Storm Lab

The text

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

350 
WFUS53 KDMX 082157
TORDMX
IAC027-073-082230-
/O.NEW.KDMX.TO.W.0002.140508T2157Z-140508T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
457 PM CDT THU MAY 8 2014

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN CARROLL COUNTY IN WEST CENTRAL IOWA...
  NORTHWESTERN GREENE COUNTY IN WEST CENTRAL IOWA...

* UNTIL 530 PM CDT
    
* AT 457 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR GLIDDEN...OR NEAR CARROLL...MOVING
  NORTHEAST AT 40 MPH.

  HAZARD...TORNADO...QUARTER SIZE HAIL AND 60 MPH WIND GUSTS. 

  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...
  GLIDDEN...CHURDAN...LIDDERDALE...LANESBORO...WILLEY...RALSTON...
  ARTHUR N NEU AIRPORT...HOBBS COUNTY PARK AND SWAN LAKE STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING ISSUED
FOR THE SAME AREA.

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A
VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND
PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4221 9471 4221 9432 4195 9474 4200 9487
TIME...MOT...LOC 2157Z 227DEG 34KT 4201 9476 

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

$$

BEERENDS

2 follow-up statements

858 
WWUS53 KDMX 082212
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
512 PM CDT THU MAY 8 2014

IAC027-073-082230-
/O.CON.KDMX.TO.W.0002.000000T0000Z-140508T2230Z/
CARROLL IA-GREENE IA-
512 PM CDT THU MAY 8 2014

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR
NORTHEASTERN CARROLL AND NORTHWESTERN GREENE COUNTIES...
    
AT 511 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR GLIDDEN...OR 11 MILES EAST OF CARROLL...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. 

LOCATIONS IMPACTED INCLUDE...
GLIDDEN...CHURDAN...LANESBORO...RALSTON AND HOBBS COUNTY PARK. 

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 IN A MOBILE HOME...A
VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND
PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4221 9470 4221 9432 4202 9464 4207 9477
TIME...MOT...LOC 2211Z 229DEG 31KT 4208 9464 

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

$$

BEERENDS

813 
WWUS53 KDMX 082230
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
530 PM CDT THU MAY 8 2014

IAC027-073-082239-
/O.EXP.KDMX.TO.W.0002.000000T0000Z-140508T2230Z/
CARROLL IA-GREENE IA-
530 PM CDT THU MAY 8 2014

...THE TORNADO WARNING FOR NORTHEASTERN CARROLL AND NORTHWESTERN
GREENE COUNTIES WILL EXPIRE AT 530 PM CDT...
                
THE STORM WHICH PROMPTED THE WARNING NO LONGER APPEARS CAPABLE OF 
PRODUCING A TORNADO. THEREFORE THE WARNING WILL BE ALLOWED TO 
EXPIRE. HOWEVER A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT 
UNTIL 615 PM CDT. 

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT THURSDAY EVENING
FOR WESTERN IOWA.


LAT...LON 4221 9470 4221 9432 4202 9464 4207 9477
TIME...MOT...LOC 2226Z 227DEG 34KT 4208 9464 

$$

BEERENDS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 7, 9:35 PM CDT	Severe Thunderstorm Warning	DMX	Carroll, Crawford, Sac	40 min
May 7, 9:57 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Pocahontas, Sac	48 min
May 7, 10:32 PM CDT	Severe Thunderstorm Warning	DMX	Humboldt, Pocahontas, Webster	43 min
May 8, 12:24 AM CDT	Severe Thunderstorm Warning	DMX	Hancock, Kossuth, Winnebago	51 min
May 8, 1:02 AM CDT	Special Weather Statement	DMX	Audubon	28 min
May 8, 1:13 AM CDT	Special Weather Statement	DMX	Calhoun, Sac	32 min
May 8, 2:01 AM CDT	Special Weather Statement	DMX	Calhoun, Humboldt	29 min
May 8, 2:41 AM CDT	Severe Thunderstorm Warning	DMX	Franklin, Hancock, Humboldt, Wright	49 min
May 8, 3:12 AM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Franklin, Hancock, Winnebago, Worth, Wright	48 min
May 8, 1:12 PM CDT	Severe Thunderstorm Warning	DMX	Humboldt, Kossuth, Palo Alto, Pocahontas	48 min
May 8, 1:43 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Kossuth, Winnebago	47 min
May 8, 4:49 PM CDT	Severe Thunderstorm Warning	DMX	Carroll, Greene	41 min
May 8, 5:19 PM CDT	Severe Thunderstorm Warning	DMX	Audubon, Greene, Guthrie	41 min
May 8, 5:25 PM CDT	Tornado Warning	DMX	Guthrie	35 min
May 8, 5:27 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Greene, Webster	48 min
May 8, 5:41 PM CDT	Severe Thunderstorm Warning	DMX	Worth	19 min
May 8, 6:13 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Madison, Union, Warren	47 min
May 8, 6:50 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Madison, Polk, Warren	40 min

Nearby

Tornado Warnings in Iowa, 2014 Every tornado warning in 2014 Tornadoes in 2014

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.