Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 48, NWS Duluth, MN

May 28, 2011Koochiching County, Minnesota

NWS Duluth, MN issued this severe thunderstorm warning at May 28, 2011, 11:57 AM CDT for Koochiching 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 28, 2011, 11:57 AM CDT (16:57 UTC)
Expired
May 28, 2011, 12:45 PM CDT
In force
48 min
Issued by
NWS Duluth, MN
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

County Koochiching County, MN

The radar

The Duluth radar (KDLH), 196 km from the middle of the area, began a volume at 16:57 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 12:00Z, 5.0 hours before the alert went out and 51 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 12:00Z on 2011-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 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 12:00Z on 2011-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 153 square meters per square second.193958Sfc1 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
456 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
153 m²/s²
0-3 km storm-relative helicity
185 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 28, 10:43 AM CDT, 1 hour 14 minutes earlier.

Area forecast discussion, May 28, 10:43 AM CDT, 1 hour 14 minutes before
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Hazardous weather outlook, May 28, 4:22 AM CDT, 7 hours 35 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DULUTH MN
422 AM CDT SAT MAY 28 2011

MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-291030-
KOOCHICHING-NORTHERN ST. LOUIS-NORTHERN COOK/NORTHERN LAKE-
NORTHERN ITASCA-CENTRAL ST. LOUIS-SOUTHERN LAKE/LAKESHORE-
SOUTHERN COOK/LAKESHORE-NORTHERN CASS-SOUTHERN ITASCA-
SOUTHERN CASS-CROW WING-NORTHERN AITKIN-SOUTHERN AITKIN-
CARLTON/SOUTHERN ST. LOUIS-PINE-DOUGLAS-BAYFIELD-ASHLAND-IRON-
BURNETT-WASHBURN-SAWYER-PRICE-
422 AM CDT SAT MAY 28 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST MINNESOTA AND
NORTHWEST WISCONSIN.

.DAY ONE...TODAY AND TONIGHT

SCATTERED THUNDERSTORMS WILL DEVELOP THIS AFTERNOON AND CONTINUE
THIS EVENING. A FEW OF THESE STORMS MAY BECOME STRONG OR SEVERE
WITH HAIL AND GUSTY WINDS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

ISOLATED STORMS MAY DEVELOP OVER PRICE COUNTY LATE SUNDAY OR
SUNDAY EVENING. STORMS SHOULD INCREASE SOUTH OF A CASS LAKE TO
TWIN PORTS TO IRON RIVER LINE SUNDAY NIGHT. SOME STORMS MAY
PRODUCE HAIL AND GUSTY WINDS.

THUNDERSTORMS...WITH POSSIBLE HAIL...GUSTY WINDS...AND HEAVY RAIN
WILL MOVE ACROSS THE NORTHLAND MONDAY MORNING. STORMS WILL BE
POSSIBLE DURING THE AFTERNOON...MAINLY ACROSS THE ARROWHEAD OF
MINNESOTA. AREAS OF FOG MAY BECOME DENSE NEAR LAKE SUPERIOR.

ADDITIONAL THUNDERSTORMS WILL REDEVELOP MONDAY NIGHT AND EARLY
TUESDAY. SOME STORMS MAY BE SEVERE WITH LARGE HAIL...DAMAGING
WINDS...AND HEAVY RAIN.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON.

LSZ121-140>148-291030-
BAYFIELD TO OAK POINT WI-GRAND PORTAGE TO GRAND MARAIS MN-
GRAND MARAIS TO TACONITE HARBOR MN-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
SILVER BAY HARBOR TO TWO HARBORS MN-TWO HARBORS TO DULUTH MN-
DULUTH MN TO PORT WING WI-PORT WING TO SAND ISLAND WI-
SAND ISLAND TO BAYFIELD WI-OAK POINT TO SAXON HARBOR WI-
422 AM CDT SAT MAY 28 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE NEARSHORE WATERS OF
WESTERN LAKE SUPERIOR.

.DAY ONE...TODAY AND TONIGHT

SCATTERED THUNDERSTORMS MAY DEVELOP THIS AFTERNOON AND
CONTINUE THIS EVENING. A FEW OF THESE STORMS MAY BECOME
STRONG OR SEVERE WITH HAIL AND GUSTY WINDS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

THUNDERSTORMS...WITH POSSIBLE HAIL...GUSTY WINDS...AND HEAVY RAIN
WILL MOVE ACROSS LAKE SUPERIOR MONDAY MORNING. STORMS WILL BE
POSSIBLE DURING THE AFTERNOON...MAINLY ACROSS THE NORTH SHORE OF
LAKE SUPERIOR. AREAS OF FOG MAY BECOME DENSE OVER LAKE SUPERIOR.

ADDITIONAL THUNDERSTORMS WILL REDEVELOP MONDAY NIGHT AND EARLY
TUESDAY. SOME STORMS MAY BE SEVERE WITH LARGE HAIL...DAMAGING
WINDS...AND HEAVY RAIN.

CANNON

MORE INFORMATION MAY BE OBTAINED AT THE FOLLOWING WEB ADDRESS:
HTTP://WWW.WEATHER.GOV/DULUTH (ALL LOWER CASE)

In the hours before

Special weather statement, May 28, 11:30 AM CDT, 27 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DULUTH MN
1130 AM CDT SAT MAY 28 2011

MNZ010-281700-
KOOCHICHING-
1130 AM CDT SAT MAY 28 2011

...RAPIDLY DEVELOPING STRONG THUNDERSTORM IN SOUTHWEST KOOCHICHING
COUNTY...

AT 1125 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
RAPIDLY DEVELOPING THUNDERSTORM 4 MILES NORTHWEST OF MIZPAH...MOVING
NORTHEAST AT 30 MPH.

THIS STORM IS CAPABLE OF PRODUCING HALF INCH DIAMETER HAIL...WIND
GUSTS UP TO 30 MPH...BRIEF MODERATE DOWNPOURS...

* THE THUNDERSTORM WILL BE NEAR...
  GEMMELL BY 1135 AM...
  MARGIE BY NOON...

GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW
AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS
PASSED.

LAT...LON 4833 9397 4802 9356 4785 9432 4799 9443

BJT

The office that day

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

IssuedProductOfficeCountiesLasted
May 28, 11:30 AM CDTSpecial Weather StatementDLHKoochiching30 min
May 28, 12:36 PM CDTSevere Thunderstorm WarningDLHKoochiching39 min
May 28, 12:53 PM CDTSpecial Weather StatementDLHItasca32 min
May 28, 1:21 PM CDTSpecial Weather StatementDLHKoochiching24 min
May 28, 1:24 PM CDTSpecial Weather StatementDLHKoochiching36 min
May 28, 1:33 PM CDTSevere Thunderstorm WarningDLHKoochiching33 min
May 28, 1:46 PM CDTSpecial Weather StatementDLHKoochiching29 min
May 28, 1:58 PM CDTSpecial Weather StatementDLHSaint Louis32 min
May 28, 2:04 PM CDTSpecial Weather StatementDLHSaint Louis36 min
May 28, 2:19 PM CDTSpecial Weather StatementDLHKoochiching26 min
May 28, 2:25 PM CDTSevere Thunderstorm WarningDLHLake, Saint Louis50 min
May 28, 2:46 PM CDTSevere Thunderstorm WarningDLHLake, Saint Louis44 min
May 28, 2:55 PM CDTSpecial Weather StatementDLH20 min
May 28, 3:00 PM CDTTornado WarningDLHLake45 min
May 28, 3:05 PM CDTSpecial Marine WarningDLH55 min
May 28, 3:23 PM CDTSpecial Weather StatementDLHSaint Louis37 min
May 28, 3:33 PM CDTSevere Thunderstorm WarningDLHCook, Lake19 min
May 28, 3:37 PM CDTSpecial Weather StatementDLHSaint Louis23 min
May 28, 4:01 PM CDTSpecial Marine WarningDLH59 min
May 28, 4:13 PM CDTSpecial Weather StatementDLHLake47 min
May 28, 4:35 PM CDTSevere Thunderstorm WarningDLHCook, Lake25 min
May 28, 4:41 PM CDTSpecial Marine WarningDLH46 min
May 28, 5:08 PM CDTSevere Thunderstorm WarningDLHAitkin, Pine37 min
May 28, 5:36 PM CDTSevere Thunderstorm WarningDLHCarlton, Pine39 min
May 28, 5:39 PM CDTSevere Thunderstorm WarningDLHLake, Saint Louis51 min
May 28, 5:59 PM CDTSpecial Marine WarningDLH61 min
May 28, 6:03 PM CDTSevere Thunderstorm WarningDLHCarlton, Saint Louis42 min
May 28, 6:40 PM CDTSpecial Weather StatementDLHCarlton35 min
May 28, 5:22 PM CDTSpecial Weather StatementDLHSawyer23 min
May 28, 6:25 PM CDTSpecial Weather StatementDLHPrice20 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2011Every severe thunderstorm warning in 2011

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.