Alert archive / Minnesota / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 235, NWS Twin Cities, MN

September 20, 2016Blue Earth County, Waseca County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 20, 2016, 10:49 PM CDT for Blue Earth County, Waseca County, Minnesota. It was in force for 41 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, 10:49 PM CDT (03:49 UTC)
Expired: Sep 20, 2016, 11:30 PM CDT
In force: 41 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Blue Earth County, MN, Waseca County, MN

The radar

The Minneapolis radar (KMPX), 94 km from the middle of the area, began a volume at 03:53 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, 3.8 hours before the alert went out and 94 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.

886 
WUUS53 KMPX 210349
SVRMPX
MNC013-161-210430-
/O.NEW.KMPX.SV.W.0235.160921T0349Z-160921T0430Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1049 PM CDT TUE SEP 20 2016

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL BLUE EARTH COUNTY IN SOUTH CENTRAL MINNESOTA...
  SOUTHWESTERN WASECA COUNTY IN SOUTH CENTRAL MINNESOTA...

* UNTIL 1130 PM CDT

* AT 1049 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER ALMA
  CITY... OR 14 MILES SOUTHEAST OF MANKATO...MOVING EAST AT 20 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 BE NEAR...
  WALDORF AROUND 1105 PM CDT. 
  WASECA AROUND 1120 PM CDT. 

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE ALMA
CITY.

THIS INCLUDES U.S. HIGHWAY 14 BETWEEN MILE MARKERS 157 AND 159.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4400 9390 4409 9387 4407 9351 4391 9361
TIME...MOT...LOC 0349Z 287DEG 18KT 4404 9377 

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

SPD

2 follow-up statements

529 
WWUS53 KMPX 210412
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1112 PM CDT TUE SEP 20 2016

MNC013-210421-
/O.CAN.KMPX.SV.W.0235.000000T0000Z-160921T0430Z/
BLUE EARTH MN-
1112 PM CDT TUE SEP 20 2016

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL BLUE EARTH COUNTY
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 4396 9376 4408 9376 4407 9351 4391 9361
TIME...MOT...LOC 0411Z 287DEG 18KT 4401 9362 

$$

MNC161-210430-
/O.CON.KMPX.SV.W.0235.000000T0000Z-160921T0430Z/
WASECA MN-
1112 PM CDT TUE SEP 20 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR SOUTHWESTERN WASECA COUNTY...

AT 1111 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR OTISCO...OR
20 MILES WEST OF OWATONNA...MOVING EAST AT 20 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. 

THIS SEVERE STORM WILL BE NEAR...
  WASECA AROUND 1120 PM CDT. 

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE ALMA
CITY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4396 9376 4408 9376 4407 9351 4391 9361
TIME...MOT...LOC 0411Z 287DEG 18KT 4401 9362 

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

SPD

455 
WWUS53 KMPX 210431
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1131 PM CDT TUE SEP 20 2016

MNC161-210440-
/O.EXP.KMPX.SV.W.0235.000000T0000Z-160921T0430Z/
WASECA MN-
1131 PM CDT TUE SEP 20 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN WASECA COUNTY HAS
EXPIRED...
        
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND HAVE EXITED THE WARNED AREA. THEREFORE THE WARNING HAS
BEEN ALLOWED TO EXPIRE.

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

LAT...LON 4396 9376 4408 9376 4407 9351 4391 9361
TIME...MOT...LOC 0429Z 287DEG 18KT 4401 9362 

$$

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, 10:32 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Brown, Le Sueur, Nicollet, Sibley	33 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.