Alert archive / Minnesota / Special Weather Statements in 2012

Special Weather Statement, NWS Duluth, MN

July 25, 2012Cass County, Minnesota

NWS Duluth, MN issued this special weather statement at Jul 25, 2012, 1:07 AM CDT for Cass County, Minnesota. It was in force for 23 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 25, 2012, 1:07 AM CDT (06:07 UTC)
Expired
Jul 25, 2012, 1:30 AM CDT
In force
23 min
Issued by
NWS Duluth, MN

County Cass County, MN

The radar

The Duluth radar (KDLH), 178 km from the middle of the area, began a volume at 06:06 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.

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 6.1 hours before the alert went out and 169 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-pSkew-T log-p diagram, International Fa, MN at 00:00Z on 2012-07-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, International Fa, MN at 00:00Z on 2012-07-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -37 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
2070 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
-37 m²/s²
0-3 km storm-relative helicity
76 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.

625 
WWUS83 KDLH 250607
SPSDLH

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DULUTH MN
107 AM CDT WED JUL 25 2012

MNZ018-025-026-250630-
NORTH CASS-NORTH ITASCA-SOUTH ITASCA-
107 AM CDT WED JUL 25 2012

...STRONG THUNDERSTORMS WITH NEARLY CONTINUOUS LIGHTNING CONTINUE TO 
AFFECT AREAS FROM LEECH LAKE TO LAKE WINNIBIGOSHISH...

AT 105 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
CLUSTER OF STRONG THUNDERSTORMS BETWEEN LEECH LAKE AND CASS LAKE...
MOVING EAST AT 35 MPH.

THESE STORMS WILL PRODUCE NEARLY CONTINUOUS CLOUD TO GROUND LIGHTING 
AND TORRENTIAL DOWNPOURS... AS WELL AS PEA SIZE HAIL...AND WIND 
GUSTS UP TO 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  PORTAGE LAKE...       SUGAR LAKE...         FEDERAL DAM...
  BOY LAKE...           LAKE WINNIBIGOSHISH...
  BOY RIVER...          BENA...               SIX MILE LAKE...
  LAKE WINNIBIGOSHISH...                      BOY RIVER...
  MUD LAKE...           BALL CLUB...          TOBIQUE...

STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES. SEEK SHELTER IN 
A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED.

LAT...LON 4711 9467 4740 9468 4741 9467 4742 9444
      4749 9442 4759 9396 4706 9386 4700 9467
      4710 9468

$$
 MILLER

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 25, 12:45 AM CDTSpecial Weather StatementDLHCrow Wing15 min
Jul 25, 12:49 AM CDTSpecial Weather StatementDLHCass11 min
Jul 25, 1:32 AM CDTSevere Thunderstorm WarningDLHCass, Crow Wing43 min
Jul 25, 1:40 AM CDTSpecial Weather StatementDLHCass20 min
Jul 25, 2:04 AM CDTSpecial Weather StatementDLHItasca11 min
Jul 25, 2:07 AM CDTSevere Thunderstorm WarningDLHCass, Crow Wing38 min
Jul 25, 2:20 AM CDTSpecial Weather StatementDLHItasca25 min
Jul 25, 2:43 AM CDTSevere Thunderstorm WarningDLHAitkin, Cass, Crow Wing, Itasca32 min
Jul 25, 2:47 AM CDTSpecial Weather StatementDLHKoochiching13 min
Jul 25, 3:15 AM CDTSevere Thunderstorm WarningDLHAitkin, Carlton, Saint Louis30 min
Jul 25, 3:30 AM CDTSpecial Weather StatementDLHSaint Louis15 min
Jul 25, 3:51 AM CDTSpecial Weather StatementDLHCarlton24 min
Jul 25, 4:16 AM CDTSpecial Weather StatementDLHLake14 min
Jul 25, 6:43 PM CDTSpecial Weather StatementDLHKoochiching17 min
Jul 25, 12:39 AM CDTSpecial Weather StatementDLHBurnett51 min
Jul 25, 1:43 AM CDTSpecial Weather StatementDLHSawyer17 min
Jul 25, 2:28 AM CDTSpecial Weather StatementDLHDouglas17 min
Jul 25, 2:34 AM CDTSpecial Weather StatementDLHSawyer26 min
Jul 25, 2:51 AM CDTSpecial Weather StatementDLHBayfield, Douglas, Price, Sawyer24 min
Jul 25, 3:18 AM CDTSpecial Weather StatementDLHBayfield, Douglas, Price12 min
Jul 25, 3:33 AM CDTSpecial Weather StatementDLHAshland, Bayfield, Price27 min
Jul 25, 4:13 AM CDTSpecial Weather StatementDLHAshland, Bayfield, Iron17 min
Jul 25, 4:41 AM CDTSpecial Weather StatementDLHAshland, Bayfield, Iron19 min
Jul 25, 5:53 AM CDTSpecial Weather StatementDLHSawyer, Washburn37 min
Jul 25, 7:08 AM CDTSpecial Weather StatementDLHIron, Price67 min

Nearby

Special Weather Statements in Minnesota, 2012Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.