Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 70, NWS Twin Cities, MN

May 19, 2012Carver County, Hennepin County, Wright County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 19, 2012, 5:53 PM CDT for Carver County, Hennepin County, Wright County, Minnesota. It was in force for 52 min. 4 reports 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: May 19, 2012, 5:53 PM CDT (22:53 UTC)
Expired: May 19, 2012, 6:45 PM CDT
In force: 52 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Carver County, MN, Hennepin County, MN, Wright County, MN

The radar

The Minneapolis radar (KMPX), 36 km from the middle of the area, began a volume at 22:54 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
May 19, 5:55 PM CDT	HAIL 0.75	New Germany, MN
May 19, 6:19 PM CDT	HAIL 0.88	Watertown, MN
May 19, 6:26 PM CDT	HAIL 0.75	Rockford, MN
May 19, 6:35 PM CDT	HAIL 0.75	Independence, MN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.9 hours before the alert went out and 34 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: 23 J/kg
Mixed-layer CIN: -352 J/kg
Mixed-layer LCL: 1615 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 192 m²/s²
0-3 km storm-relative helicity: 147 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.

880 
WUUS53 KMPX 192253
SVRMPX
MNC019-053-171-192345-
/O.NEW.KMPX.SV.W.0070.120519T2253Z-120519T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
553 PM CDT SAT MAY 19 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN CARVER COUNTY IN EAST CENTRAL MINNESOTA...
  WESTERN HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...
  WRIGHT COUNTY IN CENTRAL MINNESOTA...

* UNTIL 645 PM CDT

* AT 549 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS OF 60 MPH. THIS
  STORM WAS LOCATED NEAR WINSTED...OR ABOUT 14 MILES SOUTHWEST OF
  BUFFALO...AND MOVING NORTHEAST AT 35 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  BUFFALO...
  HOWARD LAKE...
  NEW GERMANY...
  MAYER...
  NORWOOD/YOUNG AMERICA...
  WATERTOWN...
  WAVERLY...
  MONTROSE...
  DELANO...
  INDEPENDENCE...
  ROCKFORD...
  MAPLE LAKE...
  LORETTO...
  CORCORAN...

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 4527 9372 4522 9348 4473 9391 4482 9400
      4497 9400 4498 9423 4538 9397
TIME...MOT...LOC 2253Z 215DEG 31KT 4503 9398
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
May 18, 8:21 PM CDT	Special Weather Statement	MPX	Redwood	39 min
May 18, 9:34 PM CDT	Special Weather Statement	MPX	Kandiyohi	41 min
May 18, 9:45 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi	45 min
May 18, 10:48 PM CDT	Severe Thunderstorm Warning	MPX	Stearns	27 min
May 18, 11:13 PM CDT	Severe Thunderstorm Warning	MPX	Stearns, Todd	47 min
May 18, 11:46 PM CDT	Severe Thunderstorm Warning	MPX	Todd	23 min
May 19, 4:38 PM CDT	Severe Thunderstorm Warning	MPX	Renville	32 min
May 19, 5:17 PM CDT	Severe Thunderstorm Warning	MPX	McLeod, Renville, Sibley	58 min
May 19, 6:17 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin	43 min
May 19, 6:33 PM CDT	Severe Thunderstorm Warning	MPX	Hennepin, Sherburne	27 min
May 19, 6:36 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Chisago, Dakota, Hennepin, Ramsey, Washington	54 min
May 19, 6:54 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin, Isanti	38 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2012 Every severe thunderstorm warning in 2012

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.