Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 115, NWS Twin Cities, MN

July 5, 2011Stevens County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 5, 2011, 12:35 AM CDT for Stevens County, Minnesota. It was in force for 55 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 5, 2011, 12:35 AM CDT (05:35 UTC)
Expired: Jul 5, 2011, 1:30 AM CDT
In force: 55 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Stevens County, MN

The radar

The Aberdeen radar (KABR), 186 km from the middle of the area, began a volume at 05:37 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 4, 7:14 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 5.6 hours before the alert went out and 202 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: 3256 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 1088 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 150 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 9.4

Open this sounding in Storm Lab

The text

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

937 
WUUS53 KMPX 050535
SVRMPX
MNC149-050630-
/O.NEW.KMPX.SV.W.0115.110705T0535Z-110705T0630Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1235 AM CDT TUE JUL 5 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  STEVENS COUNTY IN WEST CENTRAL MINNESOTA...

* UNTIL 130 AM CDT

* AT 1232 AM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.
  THIS STORM WAS LOCATED 11 MILES SOUTH OF CHARLESVILLE...OR ABOUT 11
  MILES EAST OF WHEATON...AND MOVING SOUTHEAST AT 20 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  MORRIS...
  DONNELLY...
  CHOKIO...
  ALBERTA...
  HANCOCK...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

REPORT ANY SIGNIFICANT WIND OR HAIL DAMAGE TO THE NEAREST LAW
ENFORCEMENT AGENCY...FOR RELAY TO THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 4577 9593 4576 9575 4551 9575 4544 9593
      4541 9621 4560 9624 4564 9627 4576 9627
TIME...MOT...LOC 0535Z 319DEG 19KT 4578 9626
WIND...HAIL 60MPH 1.00IN

$$

2 follow-up statements

247 
WWUS53 KMPX 050549
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1249 AM CDT TUE JUL 5 2011

MNC149-050630-
/O.CON.KMPX.SV.W.0115.000000T0000Z-110705T0630Z/
STEVENS MN-
1249 AM CDT TUE JUL 5 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR STEVENS COUNTY
UNTIL 130 AM CDT...

AT 1246 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING
WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 11 MILES WEST OF
DONNELLY...OR 14 MILES SOUTHEAST OF WHEATON...MOVING SOUTHEAST AT 20
MPH.

LOCATIONS IMPACTED INCLUDE...
  MORRIS...DONNELLY...CHOKIO...ALBERTA AND HANCOCK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN THE TWIN CITIES.

&&

LAT...LON 4577 9593 4576 9575 4551 9575 4544 9593
      4541 9621 4560 9624 4564 9627 4576 9627
TIME...MOT...LOC 0549Z 319DEG 19KT 4571 9622
WIND...HAIL 60MPH 1.00IN

$$

157 
WWUS53 KMPX 050623
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
123 AM CDT TUE JUL 5 2011

MNC149-050639-
/O.EXP.KMPX.SV.W.0115.000000T0000Z-110705T0630Z/
STEVENS MN-
123 AM CDT TUE JUL 5 2011

...THE SEVERE THUNDERSTORM WARNING FOR STEVENS COUNTY WILL EXPIRE AT
130 AM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY...HOWEVER SMALL HAIL AND GUSTY WINDS ARE STILL POSSIBLE WITH
THIS THUNDERSTORM.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN THE TWIN CITIES.

LAT...LON 4577 9593 4576 9575 4551 9575 4544 9593
      4541 9621 4560 9624 4564 9627 4576 9627
TIME...MOT...LOC 0624Z 319DEG 19KT 4557 9605

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 10:33 PM CDT	Special Weather Statement	MPX	Douglas	117 min
Jul 4, 11:54 PM CDT	Special Weather Statement	MPX	Douglas, Pope, Stevens, Todd	96 min
Jul 5, 1:20 AM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle	55 min
Jul 5, 2:14 AM CDT	Special Weather Statement	MPX	Chippewa, Kandiyohi, Lac qui Parle, Pope, Renville, Stearns and 2 more	76 min
Jul 5, 3:50 AM CDT	Areal Flood Advisory	MPX	Lac qui Parle, Yellow Medicine	3 hr
Jul 5, 4:56 AM CDT	Areal Flood Advisory	MPX	Stevens, Swift	4 hr
Jul 5, 5:05 AM CDT	Special Weather Statement	MPX	Pope, Stevens, Swift	55 min
Jul 5, 7:06 AM CDT	Areal Flood Advisory	MPX	Lac qui Parle, Yellow Medicine	3 hr
Jul 5, 6:26 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Ramsey, Washington	32 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.