Alert archive / Iowa / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 45, NWS Sioux Falls, SD

June 10, 2016Osceola County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 10, 2016, 7:24 PM CDT for Osceola County, Iowa. It was in force for 36 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 10, 2016, 7:24 PM CDT (00:24 UTC)
Expired: Jun 10, 2016, 8:00 PM CDT
In force: 36 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Osceola County, IA

The radar

The Sioux Falls radar (KFSD), 106 km from the middle of the area, began a volume at 00:27 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

Minneapolis, MN (KMPX), launched 00:00Z, 0.4 hours before the alert went out and 227 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: 1514 J/kg
Mixed-layer CIN: -175 J/kg
Mixed-layer LCL: 1352 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 68 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

765 
WUUS53 KFSD 110024
SVRFSD
IAC143-110100-
/O.NEW.KFSD.SV.W.0045.160611T0024Z-160611T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
724 PM CDT FRI JUN 10 2016

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN OSCEOLA COUNTY IN NORTHWESTERN IOWA...

* UNTIL 800 PM CDT

* AT 724 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR MELVIN...OR 8
  MILES SOUTHEAST OF SIBLEY...MOVING EAST AT 20 MPH.

  HAZARD...60 MPH WIND GUSTS AND HALF DOLLAR SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING...AND TREES. 

* THIS SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
  SOUTHEASTERN OSCEOLA COUNTY SOUTH OF HARRIS AND EAST OF MELVIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4325 9540 4330 9564 4341 9563 4340 9539
      4325 9539
TIME...MOT...LOC 0024Z 286DEG 16KT 4335 9558 

HAIL...1.25IN
WIND...60MPH
 
$$

CHAPMAN

2 follow-up statements

939 
WWUS53 KFSD 110043
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
743 PM CDT FRI JUN 10 2016

IAC143-110100-
/O.CON.KFSD.SV.W.0045.000000T0000Z-160611T0100Z/
OSCEOLA IA-
743 PM CDT FRI JUN 10 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR SOUTHEASTERN OSCEOLA COUNTY...

AT 741 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NORTHEAST OF
MELVIN...OR 14 MILES SOUTHEAST OF SIBLEY...MOVING EAST AT 20 MPH.

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

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING...AND TREES. 

THIS SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
SOUTHEASTERN OSCEOLA COUNTY EAST OF MELVIN AND SOUTH OF HARRIS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4325 9540 4329 9556 4337 9552 4340 9539
      4325 9539
TIME...MOT...LOC 0041Z 288DEG 16KT 4332 9549 

HAIL...1.00IN
WIND...60MPH
 
$$

CHAPMAN

667 
WWUS53 KFSD 110058
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
758 PM CDT FRI JUN 10 2016

IAC143-110107-
/O.EXP.KFSD.SV.W.0045.000000T0000Z-160611T0100Z/
OSCEOLA IA-
758 PM CDT FRI JUN 10 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN OSCEOLA COUNTY
WILL EXPIRE AT 800 PM CDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.  HOWEVER HAIL UP TO
DIME SIZE...WIND GUSTS TO AROUND 50 MPH...AND HEAVY RAIN ARE STILL
POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 4325 9540 4329 9556 4337 9552 4340 9539
      4325 9539
TIME...MOT...LOC 0056Z 286DEG 16KT 4332 9549 

$$

CHAPMAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 7:33 PM CDT	Severe Thunderstorm Warning	FSD	Dickinson	42 min
Jun 10, 8:15 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Dickinson	45 min
Jun 10, 9:00 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Dickinson, O'Brien, Osceola	60 min
Jun 10, 9:59 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista, Cherokee, Clay, O'Brien	61 min
Jun 10, 10:03 PM CDT	Severe Thunderstorm Warning	FSD	O'Brien, Osceola, Sioux	42 min
Jun 10, 10:44 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee, O'Brien, Sioux	46 min
Jun 10, 11:15 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee, O'Brien, Plymouth, Sioux	45 min
Jun 10, 11:53 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee, O'Brien, Plymouth, Sioux	16 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2016 Every severe thunderstorm warning in 2016

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.