Alert archive / Minnesota / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 171, NWS Twin Cities, MN

July 21, 2016Douglas County, Morrison County, Todd County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 21, 2016, 5:15 AM CDT for Douglas County, Morrison County, Todd County, Minnesota. It was in force for 30 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: Jul 21, 2016, 5:15 AM CDT (10:15 UTC)
Expired: Jul 21, 2016, 5:45 AM CDT
In force: 30 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Douglas County, MN, Morrison County, MN, Todd County, MN

The radar

The Minneapolis radar (KMPX), 172 km from the middle of the area, began a volume at 10:19 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
Jul 21, 12:32 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 10.3 hours before the alert went out and 170 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: 3666 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 1087 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 143 m²/s²
0-3 km storm-relative helicity: 373 m²/s²
Significant tornado parameter: 2.8
Supercell composite: 22.0

Open this sounding in Storm Lab

The text

As transmitted.

937 
WUUS53 KMPX 211015
SVRMPX
MNC041-097-153-211045-
/O.NEW.KMPX.SV.W.0171.160721T1015Z-160721T1045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
515 AM CDT THU JUL 21 2016

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL TODD COUNTY IN CENTRAL MINNESOTA...
  NORTHEASTERN DOUGLAS COUNTY IN WEST CENTRAL MINNESOTA...
  WEST CENTRAL MORRISON COUNTY IN CENTRAL MINNESOTA...

* UNTIL 545 AM CDT

* AT 515 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR
  BROWERVILLE... OR 24 MILES EAST OF ALEXANDRIA...MOVING EAST AT 45
  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 THUNDERSTORM WILL BE NEAR...
  RANDALL AROUND 540 AM CDT. 

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE ROSE
CITY AND CLOTHO.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 U.S. HIGHWAY 10 IN MINNESOTA BETWEEN MILE MARKERS 130 AND 135.
 U.S. HIGHWAY 71 BETWEEN MILE MARKERS 185 AND 205.

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 4613 9448 4593 9458 4596 9501 4603 9522
      4611 9519 4611 9514 4618 9514
TIME...MOT...LOC 1015Z 280DEG 39KT 4603 9489 

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

SPD

1 follow-up statement

977 
WWUS53 KMPX 211043
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
543 AM CDT THU JUL 21 2016

MNC041-097-153-211053-
/O.EXP.KMPX.SV.W.0171.000000T0000Z-160721T1045Z/
TODD MN-DOUGLAS MN-MORRISON MN-
543 AM CDT THU JUL 21 2016

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL TODD...NORTHEASTERN
DOUGLAS AND WEST CENTRAL MORRISON COUNTIES WILL EXPIRE AT 545 AM
CDT...
        
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE AREA.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 AM CDT FOR
CENTRAL MINNESOTA.

LAT...LON 4613 9448 4593 9458 4596 9501 4603 9522
      4611 9519 4611 9514 4618 9514
TIME...MOT...LOC 1042Z 280DEG 39KT 4603 9489 

$$

SPD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 1:40 AM CDT	Special Weather Statement	MPX	Douglas, Todd	65 min
Jul 21, 1:51 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Morrison, Todd	39 min
Jul 21, 2:19 AM CDT	Special Weather Statement	MPX	Mille Lacs, Morrison, Pope, Stearns, Stevens	41 min
Jul 21, 2:45 AM CDT	Special Weather Statement	MPX	Benton, Kanabec, Kandiyohi, Mille Lacs, Sherburne, Stearns and 2 more	45 min
Jul 21, 3:16 AM CDT	Special Weather Statement	MPX	Anoka, Chisago, Hennepin, Isanti, Kandiyohi, Meeker and 2 more	44 min
Jul 21, 3:39 AM CDT	Special Weather Statement	MPX	Anoka, Carver, Chisago, Hennepin, McLeod, Ramsey and 4 more	66 min
Jul 21, 3:47 AM CDT	Special Weather Statement	MPX	Douglas	43 min
Jul 21, 3:51 AM CDT	Special Weather Statement	MPX	Todd	39 min
Jul 21, 4:23 AM CDT	Severe Thunderstorm Warning	MPX	Douglas	37 min
Jul 21, 4:27 AM CDT	Severe Thunderstorm Warning	MPX	Todd	33 min
Jul 21, 4:34 AM CDT	Special Weather Statement	MPX	Dakota, Le Sueur, Nicollet, Rice, Scott	56 min
Jul 21, 5:00 AM CDT	Special Weather Statement	MPX	Todd	45 min
Jul 21, 5:25 AM CDT	Special Weather Statement	MPX	Goodhue	65 min
Jul 21, 5:42 AM CDT	Severe Thunderstorm Warning	MPX	Morrison, Todd	35 min
Jul 21, 6:26 AM CDT	Special Weather Statement	MPX	Benton	34 min

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.