Alert archive / Iowa / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 48, NWS Sioux Falls, SD

June 10, 20164 counties in Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 10, 2016, 9:00 PM CDT for 4 counties in Iowa. It was in force for 60 min. 11 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: Jun 10, 2016, 9:00 PM CDT (02:00 UTC)
Expired: Jun 10, 2016, 10:00 PM CDT
In force: 60 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Clay County, IA, Dickinson County, IA, O'Brien County, IA, Osceola County, IA

The radar

The Sioux Falls radar (KFSD), 129 km from the middle of the area, began a volume at 02:02 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
Jun 10, 9:00 PM CDT	TSTM WND GST 60	4 Nne Everly, IA	.
Jun 10, 9:00 PM CDT	TSTM WND GST 60	4 Nne Everly, IA
Jun 10, 9:14 PM CDT	TSTM WND GST 67	3 Wnw Spencer, IA	.
Jun 10, 9:14 PM CDT	TSTM WND GST 67	3 Wnw Spencer, IA
Jun 10, 9:15 PM CDT	TSTM WND DMG	Spencer, IA	SOCIAL MEDIA REPORT...4 INCH DIAMETER BRANCHES DOWN.
Jun 10, 9:32 PM CDT	HAIL 0.75	4 Nne Everly, IA	.
Jun 10, 9:32 PM CDT	HAIL 0.75	4 Nne Everly, IA
Jun 10, 9:50 PM CDT	TSTM WND GST 65	3 E Royal, IA	SOCIAL MEDIA REPORT.
Jun 10, 9:51 PM CDT	HAIL 0.75	Royal, IA	.
Jun 10, 9:51 PM CDT	HAIL 0.75	Royal, IA
Jun 10, 10:02 PM CDT	TSTM WND GST 70	4 N Rossie, IA	SOCIAL MEDIA REPORT.

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

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 2.0 hours before the alert went out and 222 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: 2023 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 2057 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 180 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.8

Open this sounding in Storm Lab

The text

As transmitted.

010 
WUUS53 KFSD 110200
SVRFSD
IAC041-059-141-143-110300-
/O.NEW.KFSD.SV.W.0048.160611T0200Z-160611T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
900 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...
  NORTHEASTERN O'BRIEN COUNTY IN NORTHWESTERN IOWA...
  CLAY COUNTY IN NORTHWESTERN IOWA...
  SOUTHERN DICKINSON COUNTY IN NORTHWESTERN IOWA...

* UNTIL 1000 PM CDT

* AT 858 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER
  FOSTORIA...OR NEAR SPENCER IN CLAY COUNTY...MOVING SOUTHEAST AT 15
  MPH. THIS IS THE STRONGEST PART OF A LINE OF STORMS WHICH EXTENDS
  FROM EXTREME SOUTHEAST OSCEOLA COUNTY TO JUST EAST OF DICKENS.

  HAZARD...PING PONG BALL SIZE HAIL AND 60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT HAIL 
           DAMAGE TO ROOFS...SIDING...WINDOWS...AND VEHICLES. EXPECT 
           WIND DAMAGE TO ROOFS...SIDING...AND TREES. 

* THIS SEVERE THUNDERSTORM WILL BE NEAR...
  SPENCER IN CLAY COUNTY AROUND 910 PM CDT. 

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE DICKENS
AND MONETA.

THESE STORMS HAVE A HISTORY OF LARGE HAIL AND 60 MPH WINDS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4303 9546 4329 9550 4332 9492 4302 9492
TIME...MOT...LOC 0158Z 315DEG 11KT 4322 9519 

HAIL...1.50IN
WIND...60MPH
 
$$

MJF

2 follow-up statements

213 
WWUS53 KFSD 110223
SVSFSD

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

IAC041-059-141-143-110300-
/O.CON.KFSD.SV.W.0048.000000T0000Z-160611T0300Z/
OSCEOLA IA-O'BRIEN IA-CLAY IA-DICKINSON IA-
923 PM CDT FRI JUN 10 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR SOUTHEASTERN OSCEOLA...NORTHEASTERN O'BRIEN...CLAY AND SOUTHERN
DICKINSON COUNTIES...

AT 921 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR EVERLY...OR 8
MILES NORTHWEST OF SPENCER IN CLAY COUNTY...MOVING SOUTHEAST AT 20
MPH. ANOTHER STRONG TO SEVERE STORM WAS LOCATED A FEW MILES
NORTHWEST OF SPENCER. 

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 STORM WILL BE NEAR...
  FOSTORIA AROUND 935 PM CDT. 
  SPENCER IN CLAY COUNTY AND ROYAL AROUND 940 PM CDT. 

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE DICKENS
AND MONETA.

THESE STORMS HAVE BEEN SHOWING SIGNS OF WEAKENING OVER THE PAST 15
MINTUES...AND WILL CONTINUE TO BE MONITORED FOR FURTHER WEAKENING OR
REDEVELOPMENT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4303 9546 4329 9550 4332 9492 4302 9492
TIME...MOT...LOC 0221Z 309DEG 18KT 4321 9530 

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

MJF

063 
WWUS53 KFSD 110231
SVSFSD

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

IAC041-059-141-143-110300-
/O.CON.KFSD.SV.W.0048.000000T0000Z-160611T0300Z/
OSCEOLA IA-O'BRIEN IA-CLAY IA-DICKINSON IA-
931 PM CDT FRI JUN 10 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR SOUTHEASTERN OSCEOLA...NORTHEASTERN O'BRIEN...CLAY AND SOUTHERN
DICKINSON COUNTIES...

AT 929 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR EVERLY...OR NEAR
SPENCER IN CLAY COUNTY...MOVING SOUTHEAST AT 15 MPH.

HAZARD...70 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT CONSIDERABLE 
         TREE DAMAGE. WIND DAMAGE IS ALSO LIKELY TO MOBILE HOMES...
         ROOFS...AND OUTBUILDINGS. 

THIS SEVERE STORM WILL BE NEAR...
  FOSTORIA AROUND 935 PM CDT. 
  SPENCER IN CLAY COUNTY AROUND 950 PM CDT. 
  ROYAL AROUND 955 PM CDT. 

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE DICKENS
AND MONETA.

AS THE STORM WEAKENS ALOFT...WIND REPORTS HAVE BEEN FILTERING IN.
FOR INSTANCE AT 914 PM...THE SPENCER AIRPORT WIND ANEMOMETER GUSTED
TO 67 MPH. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4303 9546 4329 9550 4332 9492 4302 9492
TIME...MOT...LOC 0229Z 315DEG 11KT 4319 9527 

HAIL...1.00IN
WIND...70MPH
 
$$

MJF

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 7:24 PM CDT	Severe Thunderstorm Warning	FSD	Osceola	36 min
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, 9:59 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.