Alert archive / South Dakota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 119, NWS Sioux Falls, SD

May 26, 20125 counties in South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at May 26, 2012, 5:44 AM CDT for 5 counties in South Dakota. It was in force for 46 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
May 26, 2012, 5:44 AM CDT (10:44 UTC)
Expired
May 26, 2012, 6:30 AM CDT
In force
46 min
Issued by
NWS Sioux Falls, SD
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

Counties Davison County, SD, Hanson County, SD, McCook County, SD, Miner County, SD, Sanborn County, SD

The radar

The Sioux Falls radar (KFSD), 81 km from the middle of the area, began a volume at 10:44 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

TimeReportWhereRemark
May 26, 6:08 AM CDTHAIL 1Howard, SDPEA TO QUARTER SIZED HAIL

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

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 10.7 hours before the alert went out and 124 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-pSkew-T log-p diagram, Aberdeen, SD at 00:00Z on 2012-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 00:00Z on 2012-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 23 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
1774 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
23 m²/s²
0-3 km storm-relative helicity
54 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

666 
WUUS53 KFSD 261044
SVRFSD
SDC035-061-087-097-111-261130-
/O.NEW.KFSD.SV.W.0119.120526T1044Z-120526T1130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
544 AM CDT SAT MAY 26 2012

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN DAVISON COUNTY IN SOUTHEAST SOUTH DAKOTA...
  NORTHERN HANSON COUNTY IN SOUTHEAST SOUTH DAKOTA...
  NORTHWESTERN MCCOOK COUNTY IN SOUTHEAST SOUTH DAKOTA...
  MINER COUNTY IN EAST CENTRAL SOUTH DAKOTA...
  SOUTHEASTERN SANBORN COUNTY IN EAST CENTRAL SOUTH DAKOTA...

* UNTIL 630 AM CDT

* AT 544 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING HALF
  DOLLAR SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE
  STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 9 MILES SOUTHWEST
  OF FEDORA TO MITCHELL...AND MOVING EAST AT 30 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  FEDORA AROUND 550 AM CDT...
  ROSWELL AROUND 555 AM CDT...
  VILAS...FULTON AND ALEXANDRIA AROUND 605 AM CDT...
  HOWARD AND FARMER AROUND 615 AM CDT...
  CANOVA AROUND 620 AM CDT...
  SPENCER AROUND 625 AM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4411 9737 4401 9737 4365 9742 4364 9823
      4412 9792
TIME...MOT...LOC 1044Z 262DEG 27KT 4390 9781 4371 9802
WIND...HAIL 60MPH 1.25IN

$$

CHENARD
2 follow-up statements
054 
WWUS53 KFSD 261110
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
610 AM CDT SAT MAY 26 2012

SDC035-261120-
/O.CAN.KFSD.SV.W.0119.000000T0000Z-120526T1130Z/
DAVISON SD-
610 AM CDT SAT MAY 26 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN DAVISON COUNTY IS
CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA.

LAT...LON 4366 9795 4412 9792 4411 9737 4401 9737
      4365 9742
TIME...MOT...LOC 1110Z 264DEG 21KT 4405 9743 4369 9780

$$

SDC061-087-097-111-261130-
/O.CON.KFSD.SV.W.0119.000000T0000Z-120526T1130Z/
SANBORN SD-MINER SD-MCCOOK SD-HANSON SD-
610 AM CDT SAT MAY 26 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
HANSON...NORTHWESTERN MCCOOK...MINER AND SOUTHEASTERN SANBORN
COUNTIES UNTIL 630 AM CDT...

AT 610 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING HALF DOLLAR SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM HOWARD TO FULTON...MOVING EAST AT
25 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  FARMER AROUND 620 AM CDT...
  CANOVA AROUND 625 AM CDT...
  SPENCER AROUND 630 AM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4366 9795 4412 9792 4411 9737 4401 9737
      4365 9742
TIME...MOT...LOC 1110Z 264DEG 21KT 4405 9743 4369 9780
WIND...HAIL 60MPH 1.25IN

$$

MJF
122 
WWUS53 KFSD 261131
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
631 AM CDT SAT MAY 26 2012

SDC061-087-097-111-261140-
/O.EXP.KFSD.SV.W.0119.000000T0000Z-120526T1130Z/
SANBORN SD-MINER SD-MCCOOK SD-HANSON SD-
631 AM CDT SAT MAY 26 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN HANSON...NORTHWESTERN
MCCOOK...MINER AND SOUTHEASTERN SANBORN COUNTIES HAS EXPIRED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR 
PROPERTY. NEAR WINFRED...A REPORT OF PEA SIZED HAIL AND 40 TO 50 MPH 
WINDS WERE OBSERVED. THEREFORE LAKE COUNTY CAN EXPECT THIS KIND OF 
ACTIVITY FOR THE NEXT HOUR OR SO. THE STORM WILL BE MONITORED FOR 
RESTRENGTHENING.  

LAT...LON 4366 9795 4412 9792 4411 9737 4401 9737
      4365 9742
TIME...MOT...LOC 1110Z 264DEG 21KT 4405 9743 4369 9780

$$

MJF

The office that day

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

IssuedProductOfficeCountiesLasted
May 26, 4:20 AM CDTSevere Thunderstorm WarningFSDBrule, Charles Mix, Gregory40 min
May 26, 4:35 AM CDTSevere Thunderstorm WarningFSDAurora, Brule, Davison40 min
May 26, 6:40 AM CDTSevere Thunderstorm WarningFSDBrookings, Kingsbury, Lake, Moody35 min
May 26, 10:41 AM CDTRiver Flood WarningFSDMoody20 hr

Nearby

Severe Thunderstorm Warnings in South Dakota, 2012Every severe thunderstorm warning in 2012

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.