Alert archive / Iowa / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 18, NWS Sioux Falls, SD

May 23, 2016Nobles County, Minnesota; Lyon County, Osceola County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at May 23, 2016, 6:06 PM CDT for Nobles County, Minnesota; Lyon County, Osceola County, Iowa. It was in force for 39 min. 2 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: May 23, 2016, 6:06 PM CDT (23:06 UTC)
Expired: May 23, 2016, 6:45 PM CDT
In force: 39 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Lyon County, IA, Osceola County, IA, Nobles County, MN

The radar

The Sioux Falls radar (KFSD), 83 km from the middle of the area, began a volume at 23:10 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
May 23, 6:08 PM CDT	HAIL 1	5 S Little Rock, IA
May 23, 6:20 PM CDT	HAIL 1	6 Nne Sibley, IA	MOST OF THE HAIL WAS PEA TO DIME SIZE WITH A FEW QUARTER SIZE.

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

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.1 hours before the alert went out and 225 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: 1408 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 180 m²/s²
0-3 km storm-relative helicity: 153 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

887 
WUUS53 KFSD 232306
SVRFSD
IAC119-143-MNC105-232345-
/O.NEW.KFSD.SV.W.0018.160523T2306Z-160523T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
606 PM CDT MON MAY 23 2016

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN OSCEOLA COUNTY IN NORTHWESTERN IOWA...
  NORTHEASTERN LYON COUNTY IN NORTHWESTERN IOWA...
  SOUTHEASTERN NOBLES COUNTY IN SOUTHWESTERN MINNESOTA...

* UNTIL 645 PM CDT

* AT 606 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR ASHTON...OR 7
  MILES SOUTHWEST OF SIBLEY...MOVING NORTH AT 35 MPH.

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

  SOURCE...TRAINED WEATHER SPOTTERS. 

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

* THIS SEVERE THUNDERSTORM WILL BE NEAR...
  LITTLE ROCK AROUND 615 PM CDT. 
  SIBLEY AROUND 620 PM CDT. 
  RUSHMORE AROUND 640 PM CDT. 
  WORTHINGTON AROUND 645 PM CDT. 

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE BIGELOW.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE
OFFICE IN SIOUX FALLS.

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4331 9576 4336 9594 4373 9586 4367 9545
      4364 9546
TIME...MOT...LOC 2306Z 202DEG 30KT 4334 9588 

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

DUX

2 follow-up statements

126 
WWUS53 KFSD 232331
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
631 PM CDT MON MAY 23 2016

IAC119-232340-
/O.CAN.KFSD.SV.W.0018.000000T0000Z-160523T2345Z/
LYON IA-
631 PM CDT MON MAY 23 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN LYON COUNTY IS
CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF
THE WARNED AREA...THEREFORE THE WARNING HAS BEEN CANCELLED.

LAT...LON 4346 9563 4356 9589 4373 9586 4367 9545
      4364 9546
TIME...MOT...LOC 2330Z 188DEG 31KT 4355 9575 

$$

IAC143-MNC105-232345-
/O.CON.KFSD.SV.W.0018.000000T0000Z-160523T2345Z/
OSCEOLA IA-NOBLES MN-
631 PM CDT MON MAY 23 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR NORTH CENTRAL OSCEOLA AND SOUTHEASTERN NOBLES COUNTIES...

AT 630 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR RUSHMORE...OR 8
MILES SOUTHWEST OF WORTHINGTON...MOVING NORTH AT 35 MPH.

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

SOURCE...TRAINED WEATHER SPOTTERS. 

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

THIS SEVERE STORM WILL BE NEAR...
  RUSHMORE AROUND 640 PM CDT. 
  WORTHINGTON AROUND 645 PM CDT. 

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE BIGELOW.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE OFFICE IN
SIOUX FALLS.

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4346 9563 4356 9589 4373 9586 4367 9545
      4364 9546
TIME...MOT...LOC 2330Z 188DEG 31KT 4355 9575 

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

DUX

509 
WWUS53 KFSD 232342
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
642 PM CDT MON MAY 23 2016

IAC143-MNC105-232352-
/O.EXP.KFSD.SV.W.0018.000000T0000Z-160523T2345Z/
OSCEOLA IA-NOBLES MN-
642 PM CDT MON MAY 23 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL OSCEOLA AND
SOUTHEASTERN NOBLES COUNTIES WILL EXPIRE AT 645 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 GUSTY WINDS
AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
SIOUX FALLS.

LAT...LON 4346 9563 4356 9589 4373 9586 4367 9545
      4364 9546
TIME...MOT...LOC 2339Z 202DEG 30KT 4355 9575 

$$

DUX

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 4:27 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth, Woodbury	33 min
May 23, 5:22 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth	23 min
May 23, 5:25 PM CDT	Flash Flood Warning	FSD	O'Brien, Plymouth, Sioux	4 hr
May 23, 5:29 PM CDT	Severe Thunderstorm Warning	FSD	Lyon, O'Brien, Osceola, Sioux	46 min
May 23, 5:39 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth	36 min
May 23, 5:58 PM CDT	Flash Flood Warning	FSD	Plymouth, Sioux	4 hr
May 23, 6:09 PM CDT	Flash Flood Warning	FSD	Osceola	4 hr
May 23, 6:23 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee, Plymouth	37 min
May 23, 6:49 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee, Clay, O'Brien	23 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2016 Severe Thunderstorm Warnings in Minnesota, 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.