Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 213, NWS Twin Cities, MN

August 1, 20115 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 1, 2011, 12:03 PM CDT for 5 counties in Minnesota. It was in force for 57 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: Aug 1, 2011, 12:03 PM CDT (17:03 UTC)
Expired: Aug 1, 2011, 1:00 PM CDT
In force: 57 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Carver County, MN, McLeod County, MN, Meeker County, MN, Renville County, MN, Sibley County, MN

The radar

The Minneapolis radar (KMPX), 58 km from the middle of the area, began a volume at 17:06 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
Aug 1, 12:40 PM CDT	TSTM WND DMG	Glencoe, MN	TREES DOWN BLOCKING A ROAD

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
Aug 1, 11:52 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 5.1 hours before the alert went out and 55 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: 2974 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 898 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 59 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

423 
WUUS53 KMPX 011703
SVRMPX
MNC019-085-093-129-143-011800-
/O.NEW.KMPX.SV.W.0213.110801T1703Z-110801T1800Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1203 PM CDT MON AUG 1 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN CARVER COUNTY IN EAST CENTRAL MINNESOTA...
  MCLEOD COUNTY IN CENTRAL MINNESOTA...
  SOUTH CENTRAL MEEKER COUNTY IN CENTRAL MINNESOTA...
  NORTHEASTERN RENVILLE COUNTY IN CENTRAL MINNESOTA...
  NORTHERN SIBLEY COUNTY IN CENTRAL MINNESOTA...

* UNTIL 100 PM CDT

* AT 1201 PM 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
  DASSEL TO LAKESIDE...AND MOVING SOUTHEAST AT 35 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  HUTCHINSON...
  LAKESIDE...
  STEWART...
  SILVER LAKE...
  WINSTED...
  BISCAY...
  BROWNTON...
  LESTER PRAIRIE...
  NEW GERMANY...
  GLENCOE...
  WATERTOWN...
  MAYER...
  NEW AUBURN...
  PLATO...

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 4489 9473 4498 9425 4497 9378 4468 9395
      4453 9436
TIME...MOT...LOC 1703Z 308DEG 29KT 4506 9423 4484 9461
WIND...HAIL 60MPH 1.00IN

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 1, 6:25 AM CDT	Areal Flood Advisory	MPX	Douglas, Pope, Stevens	6 hr
Aug 1, 6:45 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope, Stevens, Todd	45 min
Aug 1, 7:13 AM CDT	Tornado Warning	MPX	Douglas, Pope	47 min
Aug 1, 7:27 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Kandiyohi, Morrison, Pope, Stearns, Todd	63 min
Aug 1, 8:13 AM CDT	Areal Flood Advisory	MPX	Kandiyohi, Meeker, Pope, Stearns	3 hr
Aug 1, 9:00 AM CDT	Special Weather Statement	MPX	Benton, Sherburne, Stearns, Wright	60 min
Aug 1, 9:39 AM CDT	Flash Flood Warning	MPX	Douglas, Pope	3 hr
Aug 1, 9:44 AM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker	46 min
Aug 1, 10:53 AM CDT	Severe Thunderstorm Warning	MPX	Benton, Kandiyohi, Stearns	67 min
Aug 1, 11:09 AM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker, Stearns	66 min
Aug 1, 11:53 AM CDT	Severe Thunderstorm Warning	MPX	Sherburne, Stearns, Wright	67 min
Aug 1, 12:45 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Hennepin	45 min
Aug 1, 1:01 PM CDT	Areal Flood Advisory	MPX	Carver, Dakota, Hennepin, Ramsey, Scott	3 hr
Aug 1, 1:18 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Le Sueur, Rice, Scott, Sibley	57 min
Aug 1, 1:25 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Hennepin, Ramsey, Washington	65 min
Aug 1, 2:02 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue, Le Sueur, Rice, Steele, Waseca	58 min
Aug 1, 3:04 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	37 min
Aug 1, 3:54 PM CDT	Special Weather Statement	MPX	Anoka, Chisago, Isanti, Mille Lacs	51 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.