Alert archive / Iowa / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 3, NWS Sioux Falls, SD

April 24, 20164 counties in Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Apr 24, 2016, 5:27 PM CDT for 4 counties in Iowa. It was in force for 33 min. 1 report 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: Apr 24, 2016, 5:27 PM CDT (22:27 UTC)
Expired: Apr 24, 2016, 6:00 PM CDT
In force: 33 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Buena Vista County, IA, Cherokee County, IA, Clay County, IA, O'Brien County, IA

The radar

The Sioux Falls radar (KFSD), 140 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
Apr 24, 5:55 PM CDT	TSTM WND GST 65	3 E Sioux Rapids, IA

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
Apr 24, 2:28 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.5 hours before the alert went out and 182 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1281 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 440 m²/s²
0-3 km storm-relative helicity: 498 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

696 
WUUS53 KFSD 242227
SVRFSD
IAC021-035-041-141-242300-
/O.NEW.KFSD.SV.W.0003.160424T2227Z-160424T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
527 PM CDT SUN APR 24 2016

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN CHEROKEE COUNTY IN NORTHWESTERN IOWA...
  SOUTHEASTERN O'BRIEN COUNTY IN NORTHWESTERN IOWA...
  NORTHWESTERN BUENA VISTA COUNTY IN NORTHWESTERN IOWA...
  SOUTHERN CLAY COUNTY IN NORTHWESTERN IOWA...

* UNTIL 600 PM CDT

* AT 527 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER CHEROKEE...
  MOVING NORTHEAST AT 45 MPH. AT 523 PM...QUARTER SIZED HAIL WAS
  REPORTED BY LAW ENFORCEMENT, 2 MILES SOUTH OF CHEROKEE.

  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 BE NEAR...
  AURELIA AROUND 530 PM CDT. 
  LARRABEE AROUND 535 PM CDT. 
  PETERSON AND LINN GROVE AROUND 550 PM CDT. 
  ROYAL AND GREENVILLE AROUND 600 PM CDT. 

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE ROSSIE...
MERIDEN...REMBRANDT...MONETA AND CALUMET.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4256 9540 4270 9575 4315 9539 4297 9500
TIME...MOT...LOC 2227Z 213DEG 39KT 4273 9554 

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

MJF

2 follow-up statements

846 
WWUS53 KFSD 242250
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
550 PM CDT SUN APR 24 2016

IAC021-035-041-141-242300-
/O.CON.KFSD.SV.W.0003.000000T0000Z-160424T2300Z/
CHEROKEE IA-O'BRIEN IA-BUENA VISTA IA-CLAY IA-
550 PM CDT SUN APR 24 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR EASTERN CHEROKEE...SOUTHEASTERN O'BRIEN...NORTHWESTERN BUENA
VISTA AND SOUTHERN CLAY COUNTIES...

AT 547 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR PETERSON...OR
12 MILES NORTHEAST OF CHEROKEE...AND IS NEARLY STATIONARY. A STRONG
CIRCULATION CENTER EXIST ON THIS AREA...WHICH IS CAPABLE OF
PRODUCING 70 TO 80 MPH WIND SPEEDS AS IT TRACKS TOWARD LINN GROVE.
BE VERY VIGILANT SOUTHWEST OF LINN GROVE FOR VERY STRONG WIND
POTENTIAL.

THIS IS A VERY DANGEROUS STORM.

HAZARD...70 TO 80 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
         SHELTER. MOBILE HOMES WILL BE DAMAGED. EXPECT DAMAGE TO
         ROOFS...WINDOWS...AND VEHICLES. EXTENSIVE TREE DAMAGE AND
         POWER OUTAGES COULD OCCUR.  

THIS SEVERE STORM WILL BE NEAR...
  ROYAL AND GREENVILLE AROUND 600 PM CDT. 

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE ROSSIE...
MERIDEN...REMBRANDT...MONETA AND CALUMET.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4256 9540 4270 9575 4315 9539 4297 9500
TIME...MOT...LOC 2247Z 213DEG 39KT 4290 9539 

HAIL...1.00IN
WIND...80MPH
 
$$

MJF

767 
WWUS53 KFSD 242259
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
559 PM CDT SUN APR 24 2016

IAC021-035-041-141-242308-
/O.EXP.KFSD.SV.W.0003.000000T0000Z-160424T2300Z/
CHEROKEE IA-O'BRIEN IA-BUENA VISTA IA-CLAY IA-
559 PM CDT SUN APR 24 2016

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN CHEROKEE...
SOUTHEASTERN O'BRIEN...NORTHWESTERN BUENA VISTA AND SOUTHERN CLAY
COUNTIES WILL EXPIRE AT 600 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.  

SMALL HAIL AND GUSTY WINDS ARE STILL POSSIBLE WITH THIS
THUNDERSTORM. HOWEVER THE STRONG CIRCULATION SUGGESTING HIGH WIND
SOUTHWEST OF LINN GROVE HAS WEAKENED DRAMATICALLY IN THE PAST TEN
MINUTES. 

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT FOR
NORTHWESTERN IOWA.

LAT...LON 4256 9540 4270 9575 4315 9539 4297 9500
TIME...MOT...LOC 2256Z 213DEG 39KT 4290 9539 

$$

MJF

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 24, 4:06 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee, Plymouth, Woodbury	39 min
Apr 24, 4:43 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista, Cherokee, Ida, Plymouth, Woodbury	47 min
Apr 24, 6:04 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee, Plymouth, Woodbury	24 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.