Alert archive / Minnesota / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 9, NWS Duluth, MN

May 23, 2010Lake County, Saint Louis County, Minnesota

NWS Duluth, MN issued this severe thunderstorm warning at May 23, 2010, 7:57 PM CDT for Lake County, Saint Louis County, Minnesota. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 23, 2010, 7:57 PM CDT (00:57 UTC)
Expired: May 23, 2010, 8:45 PM CDT
In force: 48 min
Issued by: NWS Duluth, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Lake County, MN, Saint Louis County, MN

The radar

The Duluth radar (KDLH), 83 km from the middle of the area, began a volume at 01:00 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 23, 3:06 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 1.0 hours before the alert went out and 152 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: 2491 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 151 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at May 23, 6:59 PM CDT, 58 minutes earlier.

Area forecast discussion, May 23, 6:59 PM CDT, 58 minutes before

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Hazardous weather outlook, May 23, 3:32 PM CDT, 4 hours 25 minutes before

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In the hours before

Special weather statement, May 23, 4:04 PM CDT, 3 hours 53 minutes before

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Special weather statement, May 23, 4:31 PM CDT, 3 hours 26 minutes before

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Special weather statement, May 23, 4:45 PM CDT, 3 hours 12 minutes before

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Special weather statement, May 23, 4:50 PM CDT, 3 hours 7 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DULUTH MN
450 PM CDT SUN MAY 23 2010

MNZ034>038-232230-
CARLTON/SOUTH ST. LOUIS-CROW WING-NORTHERN AITKIN-PINE-SOUTH AITKIN-
450 PM CDT SUN MAY 23 2010

...THUNDERSTORMS MOVING THROUGH MILLE LACS LAKE...BRAINERD
LAKES...AITKIN AREAS...

AT 446 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS OVER NORTHERN MILLE LACS LAKE...WITH OTHER
DOTTED ACROSS THE AITKIN...MCGREGOR...LAWLER...AND IRONTON AREAS.
THE STORMS WERE MOVING NORTHEAST AT 30 MPH.

THIS STORM IS CAPABLE OF PRODUCING

* THE THUNDERSTORM WILL AFFECT THE
  IRONTON...AITKIN...MCGREGOR...MCGRATH...MALMO...MILLE LACS
  LAKE...AND WALDECK AREAS OVER THE NEXT HOUR.

GUSTY WINDS TO 40 MPH...PEA SIZE HAIL AND LIGHTNING WILL BE POSSIBLE
WITH THE STORMS.

SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED.

LAT...LON 4701 9351 4664 9271 4614 9326 4615 9343
      4624 9345 4623 9379 4614 9382 4628 9429

MELDE

Special weather statement, May 23, 5:40 PM CDT, 2 hours 17 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DULUTH MN
540 PM CDT SUN MAY 23 2010

MNZ011-012-019-232300-
CENTRAL ST. LOUIS-NORTH ST. LOUIS-NORTHERN COOK/NORTHERN LAKE-
540 PM CDT SUN MAY 23 2010

...STRONG THUNDERSTORMS MOVING THROUGH FAR NORTHERN MINNESOTA THIS
EVENING...

AT 536 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORMS NEAR BEAR ISLAND LAKE...WITH OTHERS SCATTERED
ACROSS THE SNOWBANK AND SEA GULL LAKE AREAS. THE STORMS WERE MOVING
NORTHEAST AT 30 MPH.

THESE STORMS ARE CAPABLE OF PRODUCING PEA SIZE HAIL...WIND GUSTS UP
TO 35 MPH...AND OCCASIONAL CLOUD TO GROUND LIGHTNING.

LOCATIONS IMPACTED INCLUDE...
  JOHNSON LAKE...       BIRCH LAKE...         WHITE IRON LAKE...
  FALL LAKE...          WINTON...             SILVER RAPIDS...
  ELY...                SHAGAWA LAKE...

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 THIS STORM HAS PASSED.

LAT...LON 4825 9083 4810 9075 4813 9057 4812 9054
      4809 9053 4749 9200 4770 9229 4809 9156
      4806 9157 4808 9148 4806 9140 4809 9124
      4819 9110 4819 9105 4826 9091 4827 9086

MELDE

Special weather statement, May 23, 6:26 PM CDT, 1 hour 31 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DULUTH MN
626 PM CDT SUN MAY 23 2010

MNZ019-026-034>038-240000-
CARLTON/SOUTH ST. LOUIS-CENTRAL ST. LOUIS-CROW WING-NORTHERN
AITKIN-PINE-SOUTH AITKIN-SOUTH ITASCA-
626 PM CDT SUN MAY 23 2010

...SHOWERS AND THUNDERSTORMS MOVING THROUGH AITKIN...SOUTHWEST SAINT
LOUIS...AND WESTERN CARLTON COUNTIES...

AT 619 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SCATTERED SHOWERS AND THUNDERSTORMS MOVING NORTHEAST AT 20 MPH
THROUGH AITKIN...WESTERN CARLTON...AND SOUTHWEST SAINT LOUIS
COUNTIES.

THESE STORMS ARE CAPABLE OF PRODUCING WIND GUSTS UP TO 30 MPH AND
OCCASIONAL CLOUD TO GROUND LIGHTNING.

LOCATIONS THAT MAY BE IMPACTED INCLUDE...
  GARRISON...           MILLE LACS LAKE...    BAY LAKE...
  WEALTHWOOD...         MALMO...              CROMWELL...
  AITKIN...             FLOODWOOD...          JACOBSON...
  MILLE LACS LAKE...

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 THIS STORM HAS PASSED.

LAT...LON 4736 9288 4706 9232 4615 9317 4615 9343
      4624 9345 4623 9379 4614 9381 4614 9411
      4618 9424

MELDE

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 8:22 PM CDT	Special Weather Statement	DLH	Aitkin	13 min
May 23, 8:32 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin	28 min
May 23, 8:58 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Pine	32 min
May 23, 9:30 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Carlton, Pine	45 min
May 23, 9:47 PM CDT	Special Weather Statement	DLH	Carlton, Lake	13 min
May 23, 9:58 PM CDT	Severe Thunderstorm Warning	DLH	Lake	32 min
May 23, 10:02 PM CDT	Special Marine Warning	DLH		58 min
May 23, 10:15 PM CDT	Severe Thunderstorm Warning	DLH	Carlton, Pine	45 min
May 23, 10:40 PM CDT	Areal Flood Advisory	DLH	Aitkin, Carlton, Pine	4 hr
May 23, 10:45 PM CDT	Areal Flood Advisory	DLH	Lake, Saint Louis	4 hr
May 23, 11:25 PM CDT	Special Weather Statement	DLH	Aitkin, Carlton	35 min
May 23, 11:35 PM CDT	Flash Flood Warning	DLH	Carlton, Lake, Pine, Saint Louis	5 hr
May 23, 11:48 PM CDT	Special Weather Statement	DLH	Lake	12 min
May 24, 12:25 AM CDT	Special Weather Statement	DLH	Aitkin, Crow Wing, Pine	50 min
May 24, 12:28 AM CDT	Special Marine Warning	DLH		92 min
May 24, 12:56 AM CDT	Special Weather Statement	DLH	Aitkin	49 min
May 24, 1:10 AM CDT	Special Marine Warning	DLH		48 min
May 24, 1:18 AM CDT	Special Weather Statement	DLH	Cass	57 min
May 24, 1:49 AM CDT	Special Weather Statement	DLH	Cass	41 min
May 24, 2:01 AM CDT	Special Weather Statement	DLH	Itasca	44 min
May 24, 2:04 AM CDT	Severe Thunderstorm Warning	DLH	Itasca	41 min
May 24, 2:16 AM CDT	Severe Thunderstorm Warning	DLH	Cass, Itasca	29 min
May 24, 2:37 AM CDT	Severe Thunderstorm Warning	DLH	Itasca	38 min
May 24, 2:39 AM CDT	Severe Thunderstorm Warning	DLH	Itasca	36 min
May 24, 3:06 AM CDT	Severe Thunderstorm Warning	DLH	Itasca, Koochiching	42 min
May 24, 3:10 AM CDT	Severe Thunderstorm Warning	DLH	Itasca, Koochiching, Saint Louis	64 min
May 24, 3:22 AM CDT	Severe Thunderstorm Warning	DLH	Itasca, Saint Louis	38 min
May 24, 4:32 AM CDT	Special Weather Statement	DLH	Saint Louis	58 min
May 24, 4:44 AM CDT	Special Weather Statement	DLH	Itasca	61 min
May 24, 4:57 AM CDT	Severe Thunderstorm Warning	DLH	Saint Louis	48 min
May 24, 5:40 AM CDT	Severe Thunderstorm Warning	DLH	Lake, Saint Louis	35 min
May 24, 6:10 AM CDT	Severe Thunderstorm Warning	DLH	Saint Louis	20 min
May 24, 6:16 AM CDT	Severe Thunderstorm Warning	DLH	Itasca	44 min
May 24, 6:42 AM CDT	Special Weather Statement	DLH	Koochiching	48 min
May 24, 6:59 AM CDT	Special Weather Statement	DLH		46 min
May 24, 7:03 AM CDT	Special Weather Statement	DLH	Itasca	12 min
May 24, 7:20 AM CDT	Special Weather Statement	DLH		30 min
May 24, 9:44 AM CDT	Special Weather Statement	DLH	Koochiching	16 min
May 24, 10:10 AM CDT	Special Weather Statement	DLH	Koochiching	35 min
May 24, 10:50 AM CDT	Special Weather Statement	DLH	Koochiching	15 min
May 24, 11:09 AM CDT	Special Weather Statement	DLH	Koochiching	21 min
May 24, 11:25 AM CDT	Special Weather Statement	DLH		20 min
May 24, 11:44 AM CDT	Special Weather Statement	DLH		16 min
May 24, 1:44 PM CDT	Special Weather Statement	DLH	Lake of the Woods	31 min
May 24, 3:12 PM CDT	Marine Dense Fog Advisory	DLH		21 hr
May 24, 5:10 PM CDT	Special Weather Statement	DLH	Koochiching	20 min
May 24, 5:33 PM CDT	Special Weather Statement	DLH	Koochiching	12 min
May 23, 8:48 PM CDT	Special Weather Statement	DLH	Douglas	42 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2010 Every severe thunderstorm warning in 2010

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.