Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 157, NWS Twin Cities, MN

July 19, 2011Todd County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 19, 2011, 6:48 AM CDT for Todd County, Minnesota. It was in force for 57 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 19, 2011, 6:48 AM CDT (11:48 UTC)
Expired: Jul 19, 2011, 7:45 AM CDT
In force: 57 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Todd County, MN

The radar

The Minneapolis radar (KMPX), 190 km from the middle of the area, began a volume at 11:52 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 11.8 hours before the alert went out and 188 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: 3580 J/kg
Mixed-layer CIN: -157 J/kg
Mixed-layer LCL: 1388 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 25 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

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

397 
WUUS53 KMPX 191148
SVRMPX
MNC153-191245-
/O.NEW.KMPX.SV.W.0157.110719T1148Z-110719T1245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
648 AM CDT TUE JUL 19 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN TODD COUNTY IN CENTRAL MINNESOTA...

* UNTIL 745 AM CDT

* AT 643 AM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS   
  LOCATED 11 MILES NORTHWEST OF DEER CREEK AND MOVING EAST AT 35 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  STAPLES...
  HEWITT...
  BERTHA...
  PHILBROOK...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS IN EXCESS OF 60 MPH. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

THIS STORM HAS A HISTORY OF PRODUCING STRONG WINDS FROM FARGO TO THE 
DETROIT LAKES AREA. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS!

&&

LAT...LON 4636 9471 4636 9466 4635 9465 4617 9465
      4616 9466 4625 9516 4636 9516 4637 9515
      4638 9473
TIME...MOT...LOC 1146Z 292DEG 31KT 4648 9546
WIND...HAIL 60MPH <.75IN

$$

1 follow-up statement

446 
WWUS53 KMPX 191231
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
731 AM CDT TUE JUL 19 2011

MNC153-191245-
/O.CON.KMPX.SV.W.0157.000000T0000Z-110719T1245Z/
TODD MN-
731 AM CDT TUE JUL 19 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN TODD
COUNTY UNTIL 745 AM CDT...

AT 730 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 10
MILES NORTHEAST OF STAPLES AIRPORT TO STAPLES TO HEWITT...MOVING EAST
AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  BERTHA AND PHILBROOK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...LARGE HAIL...AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.

&&

LAT...LON 4636 9471 4636 9466 4635 9465 4617 9465
      4616 9466 4625 9516 4636 9516 4637 9515
      4638 9473
TIME...MOT...LOC 1231Z 292DEG 31KT 4651 9470 4636 9480
          4631 9515
WIND...HAIL 60MPH <.75IN

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 6:20 AM CDT	Special Weather Statement	MPX	Todd	40 min
Jul 19, 7:43 AM CDT	Special Weather Statement	MPX	Morrison	77 min
Jul 19, 7:46 AM CDT	Special Weather Statement	MPX	Todd	29 min
Jul 19, 8:19 AM CDT	Areal Flood Advisory	MPX	Morrison	3 hr
Jul 19, 8:26 AM CDT	Special Weather Statement	MPX	Kanabec, Mille Lacs	79 min
Jul 19, 8:35 AM CDT	Severe Thunderstorm Warning	MPX	Mille Lacs, Morrison	55 min
Jul 19, 8:53 AM CDT	Severe Thunderstorm Warning	MPX	Benton, Mille Lacs, Morrison	82 min
Jul 19, 9:01 AM CDT	Flash Flood Warning	MPX	Mille Lacs, Morrison	5 hr
Jul 19, 9:30 AM CDT	Severe Thunderstorm Warning	MPX	Kanabec, Mille Lacs, Morrison	42 min
Jul 19, 9:45 AM CDT	Severe Thunderstorm Warning	MPX	Benton, Isanti, Kanabec, Mille Lacs, Sherburne	60 min
Jul 19, 10:09 AM CDT	Severe Thunderstorm Warning	MPX	Anoka, Sherburne	36 min
Jul 19, 10:40 AM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin, Ramsey	80 min
Jul 19, 11:11 AM CDT	Areal Flood Advisory	MPX	Anoka, Dakota, Ramsey, Washington	3 hr
Jul 19, 11:25 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Hennepin, Ramsey, Washington	65 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2011 Every severe thunderstorm warning in 2011

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.