Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 62, NWS Twin Cities, MN

May 18, 2012Kanabec County, Mille Lacs County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 18, 2012, 5:24 PM CDT for Kanabec County, Mille Lacs County, Minnesota. It was in force for 35 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: May 18, 2012, 5:24 PM CDT (22:24 UTC)
Expired: May 18, 2012, 5:59 PM CDT
In force: 35 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 65.0 mph

Counties Kanabec County, MN, Mille Lacs County, MN

The radar

The Duluth radar (KDLH), 123 km from the middle of the area, began a volume at 22:41 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
May 18, 5:30 PM CDT	TSTM WND DMG	8 Nnw Milaca, MN	ONE ENERGY POLE DOWN AND TEN SPRUCE TREES...LATE REPORT.

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, 10.4 hours before the alert went out and 143 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1992 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 154 m²/s²
0-3 km storm-relative helicity: 274 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

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

995 
WUUS53 KMPX 182224
SVRMPX
MNC065-095-182315-
/O.NEW.KMPX.SV.W.0062.120518T2224Z-120518T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
524 PM CDT FRI MAY 18 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN KANABEC COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHERN MILLE LACS COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 615 PM CDT

* AT 519 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING DAMAGING WINDS OF 65 MPH. THIS STORM WAS LOCATED 10 MILES
  SOUTH OF ONAMIA...OR ABOUT 12 MILES NORTH OF MILACA...AND MOVING
  NORTHEAST AT 40 MPH.  PENNY SIZE HAIL MAY ALSO ACCOMPANY THESE
  DAMAGING WINDS.

LOCATIONS IN THE WARNING INCLUDE...
  MILLE LAC LAKE...
  BAYVIEW...
  WAHKON...
  WARMAN...
  ISLE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4625 9342 4616 9342 4616 9321 4615 9320
      4582 9354 4586 9371 4626 9358 4626 9355
TIME...MOT...LOC 2224Z 210DEG 36KT 4597 9357
WIND...HAIL 65MPH 0.75IN

$$

CLF

3 follow-up statements

448 
WWUS53 KMPX 182232
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
532 PM CDT FRI MAY 18 2012

MNC065-095-182315-
/O.CON.KMPX.SV.W.0062.000000T0000Z-120518T2315Z/
KANABEC MN-MILLE LACS MN-
532 PM CDT FRI MAY 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EAST CENTRAL
MILLE LACS AND NORTHWESTERN KANABEC COUNTIES UNTIL 615 PM CDT...

AT 528 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS OF 65 MPH.  THIS
STORM WAS LOCATED 9 MILES SOUTHEAST OF ONAMIA...OR 14 MILES NORTHWEST
OF MORA...MOVING NORTHEAST AT 40 MPH. PENNY SIZE HAIL MAY ALSO
ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  WARMAN AND ISLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4590 9347 4594 9368 4617 9347 4617 9342
      4616 9342 4616 9321 4615 9320
TIME...MOT...LOC 2232Z 210DEG 36KT 4601 9351
WIND...HAIL 60MPH 0.75IN

$$

CLF

680 
WWUS53 KMPX 182246
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
546 PM CDT FRI MAY 18 2012

MNC065-095-182315-
/O.CON.KMPX.SV.W.0062.000000T0000Z-120518T2315Z/
KANABEC MN-MILLE LACS MN-
546 PM CDT FRI MAY 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
MILLE LACS AND NORTH CENTRAL KANABEC COUNTIES UNTIL 615 PM CDT...

AT 542 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS OF 60 MPH.  THIS
STORM WAS LOCATED 5 MILES WEST OF WARMAN...OR 14 MILES NORTHWEST OF
MORA...MOVING NORTHEAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  ISLE.

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 4601 9335 4603 9353 4617 9347 4617 9342
      4616 9342 4616 9321 4615 9320
TIME...MOT...LOC 2246Z 210DEG 36KT 4610 9339
WIND...HAIL 60MPH <.75IN

$$

CLF

200 
WWUS53 KMPX 182259
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
559 PM CDT FRI MAY 18 2012

MNC065-095-182314-
/O.CAN.KMPX.SV.W.0062.000000T0000Z-120518T2315Z/
KANABEC MN-MILLE LACS MN-
559 PM CDT FRI MAY 18 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MILLE LACS AND
NORTH CENTRAL KANABEC COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA.

LAT...LON 4601 9335 4603 9353 4617 9347 4617 9342
      4616 9342 4616 9321 4615 9320
TIME...MOT...LOC 2259Z 210DEG 36KT 4621 9329

$$

CLF

The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 3:52 AM CDT	Wind Advisory	MPX	Blue Earth, Brown, Chippewa, Faribault, Kandiyohi, Lac qui Parle and 10 more	15 hr
May 18, 5:12 PM CDT	Special Weather Statement	MPX	Mille Lacs	48 min
May 18, 5:28 PM CDT	Severe Thunderstorm Warning	MPX	McLeod, Meeker, Renville, Sibley	23 min
May 18, 5:37 PM CDT	Special Weather Statement	MPX	Benton	38 min
May 18, 5:50 PM CDT	Special Weather Statement	MPX	Wright	40 min
May 18, 5:57 PM CDT	Special Weather Statement	MPX	Morrison	48 min
May 18, 6:22 PM CDT	Special Weather Statement	MPX	Sherburne, Wright	53 min
May 18, 6:30 PM CDT	Special Weather Statement	MPX	Mille Lacs	45 min
May 18, 6:57 PM CDT	Special Weather Statement	MPX	Brown	48 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.