Alert archive / Minnesota / Special Weather Statements in 2013

Special Weather Statement, NWS Duluth, MN

July 18, 2013Saint Louis County, Minnesota

NWS Duluth, MN issued this special weather statement at Jul 18, 2013, 10:21 PM CDT for Saint Louis County, Minnesota. It was in force for 24 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 18, 2013, 10:21 PM CDT (03:21 UTC)
Expired: Jul 18, 2013, 10:45 PM CDT
In force: 24 min
Issued by: NWS Duluth, MN

County Saint Louis County, MN

The radar

The Duluth radar (KDLH), 90 km from the middle of the area, began a volume at 03:23 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, 3.4 hours before the alert went out and 133 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: 1309 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 632 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 228 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 10.6

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Duluth, MN wrote its last area forecast discussion before this special weather statement went out at Jul 18, 6:30 PM CDT, 3 hours 51 minutes earlier.

Area forecast discussion, Jul 18, 6:30 PM CDT, 3 hours 51 minutes before

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Hazardous weather outlook, Jul 18, 7:14 PM CDT, 3 hours 7 minutes before

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In the hours before

Special weather statement, Jul 18, 9:23 PM CDT, 58 minutes before

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Local storm report, Jul 18, 9:25 PM CDT, 56 minutes before

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Local storm report, Jul 18, 9:28 PM CDT, 53 minutes before

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Special weather statement, Jul 18, 9:40 PM CDT, 41 minutes before

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Special weather statement, Jul 18, 10:12 PM CDT, 9 minutes before

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Special weather statement, Jul 18, 10:21 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DULUTH MN
1021 PM CDT THU JUL 18 2013

MNZ018-019-025-026-190345-
CENTRAL ST. LOUIS-NORTH CASS-NORTH ITASCA-SOUTH ITASCA-
1021 PM CDT THU JUL 18 2013

...THUNDERSTORMS HEADING INTO CENTRAL ST LOUIS COUNTY...

AT 1018 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 4 MILES NORTHWEST OF
KINNEY TO COLERAINE TO SIX MILE LAKE...MOVING SOUTHEAST AT 35 MPH.

THESE STORMS ARE CAPABLE OF PRODUCING PEA SIZE HAIL...WIND GUSTS UP
TO 40 MPH...FREQUENT CLOUD TO GROUND LIGHTNING...

* THUNDERSTORMS WILL BE NEAR...
  HILL ANNEX MINE STATE PARK AND NASHWAUK BY 1025 PM...
  MOUNTAIN IRON AND PENGILLY BY 1030 PM...
  HIBBING AND DAYS HIGH LANDING BY 1035 PM...
  VIRGINIA AND FRANKLIN BY 1040 PM...
  SCHOOLCRAFT STATE PARK AND GRAND RAPIDS BY 1045 PM...

GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW
AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES. SEEK
SHELTER IN A STURDY STRUCTURE UNTIL THESE STORMS HAVE PASSED.

LAT...LON 4748 9216 4718 9293 4716 9385 4736 9429
      4736 9352 4766 9272

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 7:09 PM CDT	Special Weather Statement	DLH	Lake	21 min
Jul 18, 7:11 PM CDT	Special Marine Warning	DLH		64 min
Jul 18, 7:12 PM CDT	Special Weather Statement	DLH	Cook	18 min
Jul 18, 7:29 PM CDT	Special Weather Statement	DLH	Cook	31 min
Jul 18, 7:39 PM CDT	Special Weather Statement	DLH	Itasca	21 min
Jul 18, 7:46 PM CDT	Special Weather Statement	DLH	Saint Louis	14 min
Jul 18, 7:54 PM CDT	Flash Flood Watch	DLH	Cook, Lake, Saint Louis	8 hr
Jul 18, 8:02 PM CDT	Severe Thunderstorm Warning	DLH	Saint Louis	28 min
Jul 18, 8:28 PM CDT	Severe Thunderstorm Warning	DLH	Lake, Saint Louis	32 min
Jul 18, 9:01 PM CDT	Special Weather Statement	DLH	Itasca	44 min
Jul 18, 9:03 PM CDT	Special Weather Statement	DLH	Lake	12 min
Jul 18, 9:23 PM CDT	Special Weather Statement	DLH	Lake	27 min
Jul 18, 9:32 PM CDT	Areal Flood Advisory	DLH	Cook, Lake	12 hr
Jul 18, 9:40 PM CDT	Special Weather Statement	DLH	Itasca	35 min
Jul 18, 9:46 PM CDT	Special Marine Warning	DLH		59 min
Jul 18, 10:12 PM CDT	Special Weather Statement	DLH	Saint Louis	18 min
Jul 18, 10:44 PM CDT	Special Weather Statement	DLH	Saint Louis	31 min
Jul 18, 11:01 PM CDT	Severe Thunderstorm Warning	DLH	Itasca, Saint Louis	29 min
Jul 18, 11:22 PM CDT	Severe Thunderstorm Warning	DLH	Itasca, Saint Louis	38 min
Jul 18, 11:36 PM CDT	Severe Thunderstorm Warning	DLH	Lake, Saint Louis	24 min
Jul 18, 11:53 PM CDT	Severe Thunderstorm Warning	DLH	Lake, Saint Louis	22 min
Jul 19, 12:15 AM CDT	Special Weather Statement	DLH	Koochiching	60 min
Jul 19, 12:24 AM CDT	Areal Flood Advisory	DLH	Cook, Lake	12 hr
Jul 19, 1:26 AM CDT	Flash Flood Warning	DLH	Cook	8 hr
Jul 19, 1:07 AM CDT	Special Weather Statement	DLH	Ashland, Bayfield, Burnett, Douglas, Washburn	38 min
Jul 19, 1:42 AM CDT	Special Weather Statement	DLH	Iron, Price, Sawyer	48 min
Jul 19, 3:03 AM CDT	Special Weather Statement	DLH	Sawyer	42 min

Nearby

Special Weather Statements in Minnesota, 2013 Every special weather statement in 2013

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.