Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 112, NWS Sioux Falls, SD

May 23, 2012Jackson County, Nobles County, Minnesota; Osceola County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at May 23, 2012, 8:28 PM CDT for Jackson County, Nobles County, Minnesota; Osceola County, Iowa. It was in force for 32 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, 2012, 8:28 PM CDT (01:28 UTC)
Expired
May 23, 2012, 9:00 PM CDT
In force
32 min
Issued by
NWS Sioux Falls, SD
Area
Storm-based polygon
Hail
1.0 in
Wind
58.0 mph

Counties Osceola County, IA, Jackson County, MN, Nobles County, MN

The radar

The Sioux Falls radar (KFSD), 106 km from the middle of the area, began a volume at 01:28 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 23, 8:35 PM CDTHAIL 12 W Round Lake, MN
May 23, 8:40 PM CDTHAIL 0.755 Ne Round Lake, MN

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.

IssuedProductOfficeLasted
May 23, 4:07 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 1.5 hours before the alert went out and 263 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, Omaha, NE at 00:00Z on 2012-05-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1035 joules per kilogram.LCLLFCEL10008507005003002001001 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, Omaha, NE at 00:00Z on 2012-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 195 square meters per square second.19395878Sfc1 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
1035 J/kg
Mixed-layer CIN
-46 J/kg
Mixed-layer LCL
2387 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
195 m²/s²
0-3 km storm-relative helicity
291 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.7

Open this sounding in Storm Lab

The text

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

200 
WUUS53 KFSD 240128
SVRFSD
IAC143-MNC063-105-240200-
/O.NEW.KFSD.SV.W.0112.120524T0128Z-120524T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
828 PM CDT WED MAY 23 2012

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN OSCEOLA COUNTY IN NORTHWEST IOWA...
  SOUTHWESTERN JACKSON COUNTY IN SOUTHWEST MINNESOTA...
  SOUTHEASTERN NOBLES COUNTY IN SOUTHWEST MINNESOTA...

* UNTIL 900 PM CDT

* AT 828 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
  HAIL.  THIS STORM WAS LOCATED NEAR OCHEYEDAN...OR 11 MILES SOUTH OF
  WORTHINGTON...AND MOVING NORTHEAST AT 50 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ROUND LAKE AROUND 835 PM CDT...
  BREWSTER AROUND 845 PM 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 4364 9521 4350 9539 4340 9554 4349 9571
      4377 9542
TIME...MOT...LOC 0128Z 219DEG 42KT 4350 9557
WIND...HAIL <58MPH 1.00IN

$$

CHENARD
2 follow-up statements
575 
WWUS53 KFSD 240147
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
847 PM CDT WED MAY 23 2012

IAC143-240156-
/O.CAN.KFSD.SV.W.0112.000000T0000Z-120524T0200Z/
OSCEOLA IA-
847 PM CDT WED MAY 23 2012

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

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA. ADDITIONAL THUNDERSTORMS ARE LIKELY THIS EVENING.

LAT...LON 4364 9554 4377 9542 4364 9521 4364 9522
      4351 9538
TIME...MOT...LOC 0146Z 219DEG 42KT 4367 9538

$$

MNC063-105-240200-
/O.CON.KFSD.SV.W.0112.000000T0000Z-120524T0200Z/
JACKSON MN-NOBLES MN-
847 PM CDT WED MAY 23 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EAST CENTRAL
NOBLES AND SOUTHWESTERN JACKSON COUNTIES UNTIL 900 PM CDT...

AT 846 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
THUNDERSTORM PRODUCING QUARTER SIZE HAIL.  THIS STORM WAS LOCATED 5
MILES SOUTH OF BREWSTER...OR 8 MILES EAST OF WORTHINGTON...MOVING
NORTHEAST AT 50 MPH.

QUARTER SIZE HAIL WAS REPORTED WITH THIS STORM NEAR ROUND LAKE.

THIS SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF EAST
CENTRAL NOBLES AND SOUTHWESTERN JACKSON COUNTIES.

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 4364 9554 4377 9542 4364 9521 4364 9522
      4351 9538
TIME...MOT...LOC 0146Z 219DEG 42KT 4367 9538
WIND...HAIL <58MPH 1.00IN

$$

CHENARD
276 
WWUS53 KFSD 240156
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
856 PM CDT WED MAY 23 2012

MNC063-105-240206-
/O.EXP.KFSD.SV.W.0112.000000T0000Z-120524T0200Z/
JACKSON MN-NOBLES MN-
856 PM CDT WED MAY 23 2012

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL NOBLES AND
SOUTHWESTERN JACKSON COUNTIES WILL EXPIRE AT 900 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA. ADDITIONAL THUNDERSTORMS ARE LIKELY THIS EVENING.

LAT...LON 4364 9554 4377 9542 4364 9521 4364 9522
      4351 9538
TIME...MOT...LOC 0156Z 219DEG 42KT 4376 9528

$$

CHENARD

The office that day

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

IssuedProductOfficeCountiesLasted
May 23, 7:10 PM CDTSevere Thunderstorm WarningFSDNobles35 min
May 23, 7:35 PM CDTSevere Thunderstorm WarningFSDCottonwood, Jackson, Nobles30 min
May 23, 7:16 PM CDTSevere Thunderstorm WarningFSDIda27 min
May 23, 9:11 PM CDTSevere Thunderstorm WarningFSDO'Brien, Osceola, Sioux34 min
May 24, 9:14 AM CDTRiver Flood WarningFSDSioux24 hr
May 24, 9:14 AM CDTRiver Flood WarningFSDPlymouth24 hr
May 24, 9:14 AM CDTRiver Flood WarningFSDLyon12 hr
May 24, 9:14 AM CDTRiver Flood WarningFSDClay24 hr
May 24, 9:14 AM CDTRiver Flood WarningFSDClay24 hr
May 24, 9:14 AM CDTRiver Flood WarningFSDBuena Vista, Clay69 hr

Nearby

Severe Thunderstorm Warnings in Minnesota, 2012Severe Thunderstorm Warnings in Iowa, 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.