Alert archive / Minnesota / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 233, 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, 10:23 PM CDT for Blue Earth County, Waseca County, Minnesota. It was in force for 37 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: Sep 20, 2016, 10:23 PM CDT (03:23 UTC)
Expired: Sep 20, 2016, 11:00 PM CDT
In force: 37 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Blue Earth County, MN, Waseca County, MN

The radar

The Minneapolis radar (KMPX), 81 km from the middle of the area, began a volume at 03:26 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
Sep 20, 10:28 PM CDT	HAIL 1.75	1 S Mankato, 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.

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, 3.4 hours before the alert went out and 80 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.

811 
WUUS53 KMPX 210323
SVRMPX
MNC013-161-210400-
/O.NEW.KMPX.SV.W.0233.160921T0323Z-160921T0400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1023 PM CDT TUE SEP 20 2016

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN BLUE EARTH COUNTY IN SOUTH CENTRAL MINNESOTA...
  NORTHWESTERN WASECA COUNTY IN SOUTH CENTRAL MINNESOTA...

* UNTIL 1100 PM CDT

* AT 1022 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER MANKATO...
  MOVING EAST AT 25 MPH.

  HAZARD...PING PONG BALL SIZE HAIL AND 60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT HAIL 
           DAMAGE TO ROOFS...SIDING...WINDOWS...AND VEHICLES. EXPECT 
           WIND DAMAGE TO ROOFS...SIDING...AND TREES. 

* THIS SEVERE THUNDERSTORM WILL BE NEAR...
  EAGLE LAKE AROUND 1035 PM CDT. 
  ST. CLAIR AROUND 1040 PM CDT. 
  MADISON LAKE AROUND 1045 PM CDT. 
  JANESVILLE AROUND 1055 PM CDT. 

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE SMITHS
MILL AND SKYLINE.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 U.S. HIGHWAY 14 BETWEEN MILE MARKERS 133 AND 147.
 U.S. HIGHWAY 169 BETWEEN MILE MARKERS 52 AND 53.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4406 9406 4415 9406 4424 9378 4423 9377
      4420 9377 4420 9374 4419 9373 4405 9369
TIME...MOT...LOC 0322Z 262DEG 19KT 4413 9397 

HAIL...1.50IN
WIND...60MPH
 
$$

SPD

2 follow-up statements

284 
WWUS53 KMPX 210351
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1051 PM CDT TUE SEP 20 2016

MNC013-161-210400-
/O.CON.KMPX.SV.W.0233.000000T0000Z-160921T0400Z/
BLUE EARTH MN-WASECA MN-
1051 PM CDT TUE SEP 20 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM CDT
FOR NORTHEASTERN BLUE EARTH AND NORTHWESTERN WASECA COUNTIES...

AT 1051 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER SMITHS
MILL... OR 11 MILES EAST OF MANKATO...MOVING EAST AT 30 MPH.

HAZARD...PING PONG BALL SIZE HAIL AND 60 MPH WIND GUSTS. 

SOURCE...RADAR INDICATED. 

IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT HAIL
         DAMAGE TO ROOFS...SIDING...WINDOWS...AND VEHICLES. EXPECT
         WIND DAMAGE TO ROOFS...SIDING...AND TREES. 

THIS SEVERE STORM WILL BE NEAR...
  JANESVILLE AROUND 1055 PM CDT. 

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE SMITHS
MILL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4406 9392 4418 9396 4424 9378 4423 9377
      4420 9377 4420 9374 4419 9373 4405 9369
TIME...MOT...LOC 0351Z 262DEG 19KT 4415 9376 

HAIL...1.50IN
WIND...60MPH
 
$$

SPD

692 
WWUS53 KMPX 210405 RRA
SVSMPX

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

MNC013-161-210415-
/O.EXP.KMPX.SV.W.0233.000000T0000Z-160921T0400Z/
BLUE EARTH MN-WASECA MN-
1105 PM CDT TUE SEP 20 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BLUE EARTH AND
NORTHWESTERN WASECA COUNTIES 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 4406 9392 4418 9396 4424 9378 4423 9377
      4420 9377 4420 9374 4419 9373 4405 9369
TIME...MOT...LOC 0403Z 262DEG 19KT 4415 9376 

$$

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, 10:32 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Brown, Le Sueur, Nicollet, Sibley	33 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.