Alert archive / Minnesota / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 234, NWS Twin Cities, MN

September 20, 20165 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 20, 2016, 10:32 PM CDT for 5 counties in Minnesota. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Sep 20, 2016, 10:32 PM CDT (03:32 UTC)
Expired: Sep 20, 2016, 11:05 PM CDT
In force: 33 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Blue Earth County, MN, Brown County, MN, Le Sueur County, MN, Nicollet County, MN, Sibley County, MN

The radar

The Minneapolis radar (KMPX), 83 km from the middle of the area, began a volume at 03:32 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Sep 20, 9:34 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 3.5 hours before the alert went out and 81 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: 1882 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 230 m²/s²
0-3 km storm-relative helicity: 662 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

As transmitted.

820 
WUUS53 KMPX 210332
SVRMPX
MNC013-015-079-103-143-210415-
/O.NEW.KMPX.SV.W.0234.160921T0332Z-160921T0415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1032 PM CDT TUE SEP 20 2016

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL SIBLEY COUNTY IN CENTRAL MINNESOTA...
  EAST CENTRAL BROWN COUNTY IN SOUTH CENTRAL MINNESOTA...
  NORTHWESTERN BLUE EARTH COUNTY IN SOUTH CENTRAL MINNESOTA...
  NICOLLET COUNTY IN SOUTH CENTRAL MINNESOTA...
  WEST CENTRAL LE SUEUR COUNTY IN SOUTH CENTRAL MINNESOTA...

* UNTIL 1115 PM CDT

* AT 1032 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR
  KLOSSNER...OR NEAR NEW ULM...MOVING NORTHEAST AT 40 MPH.

  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 REMAIN OVER MAINLY RURAL AREAS OF
  SOUTH CENTRAL SIBLEY...EAST CENTRAL BROWN...NORTHWESTERN BLUE
  EARTH...NICOLLET AND WEST CENTRAL LE SUEUR COUNTIES...INCLUDING THE
  FOLLOWING LOCATIONS: NORSELAND...NEW ULM AIRPORT...RUSH RIVER...
  KLOSSNER...NEW ROME...SEARLES...OSHAWA...OTTAWA AND NEW SWEDEN.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 U.S. HIGHWAY 14 BETWEEN MILE MARKERS 100 AND 121.
 U.S. HIGHWAY 169 BETWEEN MILE MARKERS 61 AND 72.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4417 9444 4431 9456 4456 9408 4430 9388
TIME...MOT...LOC 0332Z 244DEG 33KT 4433 9439 

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

SPD

3 follow-up statements

390 
WWUS53 KMPX 210345
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1045 PM CDT TUE SEP 20 2016

MNC013-015-210355-
/O.CAN.KMPX.SV.W.0234.000000T0000Z-160921T0415Z/
BROWN MN-BLUE EARTH MN-
1045 PM CDT TUE SEP 20 2016

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL BROWN AND
NORTHWESTERN BLUE EARTH COUNTIES IS CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF
THE WARNED AREA THEREFORE THE WARNING HAS BEEN CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 AM CDT FOR
SOUTH CENTRAL MINNESOTA.

LAT...LON 4422 9423 4437 9442 4456 9408 4430 9388
TIME...MOT...LOC 0345Z 244DEG 33KT 4438 9424 

$$

MNC079-103-143-210415-
/O.CON.KMPX.SV.W.0234.000000T0000Z-160921T0415Z/
SIBLEY MN-NICOLLET MN-LE SUEUR MN-
1045 PM CDT TUE SEP 20 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT
FOR SOUTH CENTRAL SIBLEY...EASTERN NICOLLET AND WEST CENTRAL LE SUEUR
COUNTIES...

AT 1045 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR NEW
SWEDEN...OR 12 MILES NORTHEAST OF NEW ULM...MOVING NORTHEAST AT 40
MPH.

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. 

LOCATIONS IMPACTED INCLUDE...
ST. PETER...NICOLLET...KASOTA...OSHAWA...NEW SWEDEN...OTTAWA...
NORSELAND...RUSH RIVER AND NEW ROME.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4422 9423 4437 9442 4456 9408 4430 9388
TIME...MOT...LOC 0345Z 244DEG 33KT 4438 9424 

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

SPD

625 
WWUS53 KMPX 210358
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1058 PM CDT TUE SEP 20 2016

MNC079-103-143-210415-
/O.CON.KMPX.SV.W.0234.000000T0000Z-160921T0415Z/
SIBLEY MN-NICOLLET MN-LE SUEUR MN-
1058 PM CDT TUE SEP 20 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT
FOR SOUTH CENTRAL SIBLEY...NORTHEASTERN NICOLLET AND WEST CENTRAL LE
SUEUR COUNTIES...

AT 1058 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER
NORSELAND...OR 19 MILES NORTH OF MANKATO...MOVING NORTHEAST AT 40
MPH.

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. 

LOCATIONS IMPACTED INCLUDE...
ST. PETER...KASOTA...OSHAWA...NEW SWEDEN...OTTAWA...NORSELAND...
RUSH RIVER AND NEW ROME.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4425 9408 4447 9422 4456 9408 4430 9388
TIME...MOT...LOC 0358Z 244DEG 33KT 4443 9409 

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

SPD

554 
WWUS53 KMPX 210405
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1105 PM CDT TUE SEP 20 2016

MNC079-103-143-210414-
/O.CAN.KMPX.SV.W.0234.000000T0000Z-160921T0415Z/
SIBLEY MN-NICOLLET MN-LE SUEUR MN-
1105 PM CDT TUE SEP 20 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL SIBLEY...
NORTHEASTERN NICOLLET AND WEST CENTRAL LE SUEUR COUNTIES IS
CANCELLED...
        
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND HAVE EXITED THE WARNED AREA. THEREFORE THE WARNING HAS
BEEN CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 AM CDT FOR
SOUTH CENTRAL MINNESOTA.

LAT...LON 4425 9408 4447 9422 4456 9408 4430 9388
TIME...MOT...LOC 0403Z 244DEG 33KT 4446 9401 

$$

SPD

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 20, 9:49 PM CDT	Special Weather Statement	MPX	Nicollet	26 min
Sep 20, 10:23 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Waseca	37 min
Sep 20, 10:49 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Waseca	41 min
Sep 20, 11:20 PM CDT	Special Weather Statement	MPX	Dakota	25 min
Sep 20, 11:37 PM CDT	Special Weather Statement	MPX	Ramsey	23 min
Sep 20, 11:50 PM CDT	Special Weather Statement	MPX	Steele, Waseca	40 min
Sep 20, 11:59 PM CDT	Flash Flood Warning	MPX	Steele, Waseca	3 hr
Sep 21, 12:06 AM CDT	Severe Thunderstorm Warning	MPX	Steele, Waseca	24 min
Sep 21, 12:25 AM CDT	Severe Thunderstorm Warning	MPX	Freeborn, Steele, Waseca	35 min
Sep 21, 1:00 AM CDT	Severe Thunderstorm Warning	MPX	Steele	30 min
Sep 21, 1:58 AM CDT	Special Weather Statement	MPX	Goodhue	62 min
Sep 21, 10:54 AM CDT	Special Weather Statement	MPX	Freeborn	21 min
Sep 21, 2:32 PM CDT	Special Weather Statement	MPX	Dakota	43 min
Sep 21, 4:04 PM CDT	Special Weather Statement	MPX	Ramsey	26 min
Sep 21, 4:39 PM CDT	Special Weather Statement	MPX	Washington	36 min
Sep 21, 4:42 PM CDT	Severe Thunderstorm Warning	MPX	Washington	33 min
Sep 21, 5:48 PM CDT	Special Weather Statement	MPX	Freeborn	42 min
Sep 21, 6:15 PM CDT	Special Weather Statement	MPX	Wright	45 min
Sep 21, 6:20 PM CDT	Special Weather Statement	MPX	Hennepin	40 min
Sep 21, 6:33 PM CDT	Severe Thunderstorm Warning	MPX	Hennepin	42 min
Sep 21, 6:33 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker, Stearns	42 min
Sep 21, 6:50 PM CDT	Flash Flood Warning	MPX	Anoka, Hennepin, Ramsey, Washington	9 hr

Nearby

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.