Alert archive / Iowa / Tornado Warnings in 2019

Tornado Warning 39, NWS Sioux Falls, SD

September 24, 2019Ida County, Iowa

NWS Sioux Falls, SD issued this tornado warning at Sep 24, 2019, 5:29 PM CDT for Ida County, Iowa. It was in force for 31 min. 6 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Sep 24, 2019, 5:29 PM CDT (22:29 UTC)
Expired: Sep 24, 2019, 6:00 PM CDT
In force: 31 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.75 in

County Ida County, IA

The radar

The Omaha radar (KOAX), 144 km from the middle of the area, began a volume at 22:29 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.

What was reported inside it

Time	Report	Where	Remark
Sep 24, 5:31 PM CDT	TORNADO	5 Se Cushing, IA	BRIEF ROPE TORNADO. STILL EXTREME ROTATION TO WALL CLOUD.
Sep 24, 5:33 PM CDT	HAIL 1.75	1 Ese Holstein, IA	CORRECTS TIME OF PREVIOUS HAIL REPORT FROM 1 ESE HOLSTEIN.
Sep 24, 5:35 PM CDT	HAIL 1.75	Holstein, IA
Sep 24, 5:39 PM CDT	HAIL 1.5	Holstein, IA
Sep 24, 5:42 PM CDT	TORNADO	5 Nne Ida Grove, IA
Sep 24, 5:45 PM CDT	HAIL 1	Galva, IA	REPORT VIA SOCIAL MEDIA PHOTO.

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

The watch it was issued in

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

Issued	Product	Office	Lasted
Sep 24, 4:43 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.5 hours before the alert went out and 144 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: 498 J/kg
Mixed-layer CIN: -185 J/kg
Mixed-layer LCL: 1159 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 241 m²/s²
0-3 km storm-relative helicity: 245 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

As transmitted.

822 
WFUS53 KFSD 242229
TORFSD
IAC093-242300-
/O.NEW.KFSD.TO.W.0039.190924T2229Z-190924T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Sioux Falls SD
529 PM CDT Tue Sep 24 2019

The National Weather Service in Sioux Falls has issued a

* Tornado Warning for...
  Central Ida County in west central Iowa...

* Until 600 PM CDT.
    
* At 529 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Holstein, or 7 miles northwest of Ida Grove,
  moving east at 25 mph.

  HAZARD...Tornado and golf ball 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 dangerous storm will be near...
  Holstein around 535 PM CDT.
  Ida Grove around 545 PM CDT.
  Galva around 550 PM CDT.

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 4235 9562 4248 9564 4252 9539 4248 9539
      4247 9532 4234 9532
TIME...MOT...LOC 2229Z 267DEG 22KT 4242 9559 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

JM

3 follow-up statements

845 
WWUS53 KFSD 242245
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
545 PM CDT Tue Sep 24 2019

IAC093-242300-
/O.CON.KFSD.TO.W.0039.000000T0000Z-190924T2300Z/
Ida IA-
545 PM CDT Tue Sep 24 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 600 PM CDT FOR CENTRAL
IDA COUNTY...
    
At 544 PM CDT, a confirmed tornado was located near Ida Grove, moving
east at 25 mph.

HAZARD...Damaging tornado and golf ball size hail.

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 tornado will be near...
  Galva around 550 PM CDT.

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 4235 9562 4248 9564 4252 9539 4248 9539
      4247 9532 4234 9532
TIME...MOT...LOC 2244Z 267DEG 22KT 4242 9546 

TORNADO...OBSERVED
HAIL...1.75IN

$$

JM

679 
WWUS53 KFSD 242251
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
551 PM CDT Tue Sep 24 2019

IAC093-242300-
/O.CON.KFSD.TO.W.0039.000000T0000Z-190924T2300Z/
Ida IA-
551 PM CDT Tue Sep 24 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 600 PM CDT FOR CENTRAL
IDA COUNTY...
    
At 550 PM CDT, a confirmed tornado was located near Galva, or 7 miles
north of Ida Grove, moving northeast at 20 mph.

HAZARD...Damaging tornado and golf ball size hail.

SOURCE...Weather spotters confirmed tornado. At 5:42 pm CDT, a 
         tornado was reported at the intersection of Highway 59 and 
         210th Street!

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...
  Galva around 600 PM CDT.

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 4235 9562 4248 9564 4252 9539 4248 9539
      4247 9532 4234 9532
TIME...MOT...LOC 2250Z 245DEG 18KT 4246 9545 

TORNADO...OBSERVED
HAIL...1.75IN

$$

JM

779 
WWUS53 KFSD 242259 RRA
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
559 PM CDT Tue Sep 24 2019

IAC093-242309-
/O.EXP.KFSD.TO.W.0039.000000T0000Z-190924T2300Z/
Ida IA-
559 PM CDT Tue Sep 24 2019

...THE TORNADO WARNING FOR CENTRAL IDA COUNTY WILL EXPIRE AT 600 PM
CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

A Tornado Watch remains in effect until midnight CDT for west central
Iowa.

LAT...LON 4235 9562 4248 9564 4252 9539 4248 9539
      4247 9532 4234 9532
TIME...MOT...LOC 2259Z 267DEG 22KT 4246 9538 

$$

JM

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 24, 4:25 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista, Cherokee, Ida, Plymouth, Woodbury	50 min
Sep 24, 5:19 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista, Cherokee, Ida, Woodbury	41 min
Sep 24, 6:32 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista, Cherokee, O'Brien, Plymouth	43 min

Nearby

Tornado Warnings in Iowa, 2019 Every tornado warning in 2019 Tornadoes in 2019

Sources

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.