Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 172, NWS Twin Cities, MN

July 23, 2011Douglas County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 23, 2011, 4:48 AM CDT for Douglas County, Minnesota. It was in force for 42 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 23, 2011, 4:48 AM CDT (09:48 UTC)
Expired: Jul 23, 2011, 5:30 AM CDT
In force: 42 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Douglas County, MN

The radar

The Minneapolis radar (KMPX), 195 km from the middle of the area, began a volume at 09:51 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 23, 1:41 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 9.8 hours before the alert went out and 193 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: 2607 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 1019 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 58 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.6

Open this sounding in Storm Lab

The text

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

924 
WUUS53 KMPX 230948
SVRMPX
MNC041-231030-
/O.NEW.KMPX.SV.W.0172.110723T0948Z-110723T1030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
448 AM CDT SAT JUL 23 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

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

* UNTIL 530 AM CDT

* AT 447 AM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
  CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS
  OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 8
  MILES NORTHWEST OF MILLERVILLE TO KENSINGTON...AND MOVING EAST AT
  40 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  ALEXANDRIA...
  EVANSVILLE...
  KENSINGTON...
  BRANDON...
  MILLERVILLE...
  GARFIELD...
  FORADA...
  CARLOS...
  MILTONA...
  OSAKIS...
  ROSE CITY...

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.

&&

LAT...LON 4612 9519 4611 9514 4576 9514 4576 9556
      4577 9577 4597 9578 4610 9578 4612 9576
TIME...MOT...LOC 0948Z 272DEG 36KT 4616 9565 4579 9563
WIND...HAIL 60MPH 1.00IN

$$

1 follow-up statement

118 
WWUS53 KMPX 231014
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
514 AM CDT SAT JUL 23 2011

MNC041-231030-
/O.CON.KMPX.SV.W.0172.000000T0000Z-110723T1030Z/
DOUGLAS MN-
514 AM CDT SAT JUL 23 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR DOUGLAS COUNTY
UNTIL 530 AM CDT...

AT 510 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG
A LINE EXTENDING FROM PARKERS PRAIRIE TO LOWRY...MOVING EAST AT 45
MPH.

LOCATIONS IMPACTED INCLUDE...
  FORADA...ROSE CITY...OSAKIS...BELLE RIVER AND NELSON.

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 4612 9519 4611 9514 4576 9514 4576 9556
      4577 9577 4597 9578 4610 9578 4612 9576
TIME...MOT...LOC 1014Z 272DEG 37KT 4613 9519 4569 9548
WIND...HAIL 60MPH 1.00IN

$$

JPC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 7:11 PM CDT	Severe Thunderstorm Warning	MPX	Stevens	30 min
Jul 22, 7:55 PM CDT	Special Weather Statement	MPX	Lac qui Parle	50 min
Jul 22, 8:47 PM CDT	Special Weather Statement	MPX	Lac qui Parle	73 min
Jul 23, 3:56 AM CDT	Heat Advisory	MPX	Blue Earth, Brown, Faribault, Freeborn, Goodhue, Le Sueur and 7 more	11 hr
Jul 23, 4:38 AM CDT	Special Weather Statement	MPX	Douglas, Pope, Stevens	67 min
Jul 23, 5:21 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Morrison, Pope, Stearns, Todd	54 min
Jul 23, 6:21 AM CDT	Special Weather Statement	MPX	Benton, Kandiyohi, Meeker, Mille Lacs, Morrison, Sherburne and 1 more	69 min
Jul 23, 7:39 AM CDT	Special Weather Statement	MPX	Anoka, Chisago, Isanti, Kanabec, McLeod, Meeker and 5 more	51 min
Jul 23, 8:27 AM CDT	Special Weather Statement	MPX	Carver, Scott	48 min
Jul 23, 8:46 AM CDT	Severe Thunderstorm Warning	MPX	Carver, Le Sueur, Rice, Scott	44 min
Jul 23, 9:17 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue, Rice, Scott, Steele	58 min
Jul 23, 10:09 AM CDT	Severe Thunderstorm Warning	MPX	Goodhue	51 min
Jul 23, 1:04 PM CDT	Special Weather Statement	MPX	Pope	56 min
Jul 23, 1:53 PM CDT	Special Weather Statement	MPX	Stearns	52 min
Jul 23, 1:55 PM CDT	Special Weather Statement	MPX	Benton	35 min
Jul 23, 2:34 PM CDT	Special Weather Statement	MPX	Sherburne	41 min
Jul 23, 3:08 PM CDT	Special Weather Statement	MPX	Sherburne	37 min
Jul 23, 4:03 PM CDT	Special Weather Statement	MPX	Ramsey, Washington	57 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.