Alert archive / Michigan / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 30, NWS Marquette, MI

July 12, 2008Iron County, Michigan

NWS Marquette, MI issued this severe thunderstorm warning at Jul 12, 2008, 12:30 AM CDT for Iron County, Michigan. It was in force for 30 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
Jul 12, 2008, 12:30 AM CDT (05:30 UTC)
Expired
Jul 12, 2008, 1:00 AM CDT
In force
30 min
Issued by
NWS Marquette, MI
Area
Storm-based polygon

County Iron County, MI

The radar

The Marquette radar (KMQT), 83 km from the middle of the area, began a volume at 05:30 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.

IssuedProductOfficeLasted
Jul 11, 9:15 PM CDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 5.5 hours before the alert went out and 195 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, Green Bay/Straub, WI at 00:00Z on 2008-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4 joules per kilogram.LCLLFCEL10008507005003002001001 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, Green Bay/Straub, WI at 00:00Z on 2008-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 166 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
4 J/kg
Mixed-layer CIN
-395 J/kg
Mixed-layer LCL
1352 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
166 m²/s²
0-3 km storm-relative helicity
281 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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 Marquette, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 12, 12:25 AM CDT, 5 minutes earlier.

Area forecast discussion, Jul 12, 12:25 AM CDT, 5 minutes before
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Hazardous weather outlook, Jul 11, 3:09 PM CDT, 9 hours 21 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MARQUETTE MI
409 PM EDT FRI JUL 11 2008

MIZ001>007-009>014-084-085-122015-
KEWEENAW-ONTONAGON-NORTHERN HOUGHTON-BARAGA-MARQUETTE-ALGER-LUCE-
GOGEBIC-IRON-DICKINSON-MENOMINEE-DELTA-SOUTHERN SCHOOLCRAFT-
SOUTHERN HOUGHTON-NORTHERN SCHOOLCRAFT-
409 PM EDT FRI JUL 11 2008 /309 PM CDT FRI JUL 11 2008/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN UPPER
MICHIGAN AND CENTRAL UPPER MICHIGAN.

.DAY ONE...TONIGHT

A LINE OF THUNDERSTORMS WILL MOVE INTO FAR WESTERN UPPER MICHIGAN
LATE THIS EVENING...THEN MOVE INTO CENTRAL UPPER MICHIGAN AFTER
MIDNIGHT. THE STORMS MAY BE SEVERE AS THEY ENTER WESTERN UPPER
MICHIGAN...CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WINDS.
HOWEVER...THE STORMS SHOULD DIMINISH IN INTENSITY AS THEY MOVE
EAST INTO CENTRAL UPPER MICHIGAN.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH FRIDAY

SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS EASTERN UPPER
MICHIGAN BEFORE DIMINISHING BY LATE MORNING ACROSS CENTRAL UPPER
MICHIGAN.

ADDITIONAL THUNDERSTORMS ARE POSSIBLE OVER WESTERN UPPER MICHIGAN
ON TUESDAY...AND THEN ACROSS ALL OF WEST AND CENTRAL UPPER
MICHIGAN TUESDAY NIGHT THROUGH WEDNESDAY NIGHT AND THEN AGAIN ON
FRIDAY.

.SPOTTER INFORMATION STATEMENT...

STORM SPOTTER ACTIVATION MAY BE REQUIRED TONIGHT...ESPECIALLY
ACROSS THE WEST HALF OF UPPER MICHIGAN.

LSZ162-240>251-263>267-122015-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-SAXON HARBOR WI TO BLACK RIVER MI-
BLACK RIVER TO ONTONAGON MI-
ONTONAGON TO UPPER ENTRANCE OF PORTAGE CANAL MI-
UPPER ENTRANCE OF PORTAGE CANAL TO EAGLE RIVER MI-
EAGLE RIVER TO MANITOU ISLAND MI-
MANITOU ISLAND TO POINT ISABELLE MI-
POINT ISABELLE TO LOWER ENTRANCE OF PORTAGE CANAL MI-
LOWER ENTRANCE OF PORTAGE CANAL TO HURON ISLANDS MI INCLUDING
KEWEENAW AND HURON BAYS-HURON ISLANDS TO MARQUETTE MI-
MARQUETTE TO MUNISING MI-MUNISING TO GRAND MARAIS MI-
GRAND MARAIS TO WHITEFISH POINT MI-
LAKE SUPERIOR FROM SAXON HARBOR WI TO UPPER ENTRANCE TO PORTAGE
CANAL MI 5NM OFF SHORE TO THE US/CANADIAN BORDER INCLUDING ISLE
ROYALE NATIONAL PARK-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
LAKE SUPERIOR EAST OF A LINE FROM MANITOU ISLAND TO MARQUETTE MI
AND WEST OF A LINE FROM GRAND MARAIS MI TO THE US/CANADIAN BORDER
BEYOND 5NM FROM SHORE-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
409 PM EDT FRI JUL 11 2008 /309 PM CDT FRI JUL 11 2008/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN LAKE
SUPERIOR...CENTRAL LAKE SUPERIOR AND WESTERN LAKE SUPERIOR.

.DAY ONE...TONIGHT

A LINE OF THUNDERSTORMS WILL MOVE INTO FAR WESTERN LAKE SUPERIOR
LATE THIS EVENING...THEN MOVE INTO CENTRAL LAKE SUPERIOR AFTER
MIDNIGHT. THE STORMS MAY BE SEVERE AS THEY ENTER THE WESTERN PARTS
OF THE LAKE AND ARE CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING
WINDS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH FRIDAY

SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS EASTERN LAKE
SUPERIOR BEFORE DIMINISHING BY LATE MORNING.

ADDITIONAL THUNDERSTORMS ARE POSSIBLE OVER WESTERN LAKE SUPERIOR
ON TUESDAY...AND THEN ACROSS ALL OF THE LAKE ON TUESDAY NIGHT
THROUGH WEDNESDAY NIGHT AND THEN AGAIN ON FRIDAY.

.SPOTTER INFORMATION STATEMENT...

STORMS SPOTTER ACTIVATION MAY BE NEEDED TONIGHT.

LMZ221-248-250-122015-
GREEN BAY NORTH OF LINE FROM CEDAR RIVER MI TO ROCK ISLAND
PASSAGE-SEUL CHOIX POINT TO POINT DETOUR MI-
5NM EAST OF A LINE FROM FAIRPORT MI TO ROCK ISLAND PASSAGE-
409 PM EDT FRI JUL 11 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN LAKE
LAKE MICHIGAN.

.DAY ONE...TONIGHT

A LINE OF THUNDERSTORMS IS EXPECTED TO FORM LATE THIS AFTERNOON
OVER MINNESOTA AND NORTHWEST WISCONSIN. LOOK FOR THESE STORMS TO
MOVE ACROSS NORTHERN LAKE MICHIGAN AFTER MIDNIGHT TONIGHT. SOME
OF THE STORMS COULD PRODUCE SMALL HAIL AND WIND GUSTS TO 45 MPH.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH FRIDAY

ANY LINGERING STORMS FROM TONIGHT WILL END BY NOON ON SATURDAY AS
THEY CONTINUE MOVING EAST.

ADDITIONAL THUNDERSTORMS ARE POSSIBLE TUESDAY NIGHT THROUGH
WEDNESDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

STORM SPOTTER ACTIVATION MAY BE NEEDED TONIGHT.

PEARSON

In the hours before

Local storm report, Jul 11, 11:02 PM CDT, 1 hour 28 minutes before
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Special weather statement, Jul 11, 11:06 PM CDT, 1 hour 24 minutes before
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Local storm report, Jul 11, 11:16 PM CDT, 1 hour 14 minutes before
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The office that day

Everything else NWS Marquette, MI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 11, 7:09 PM CDTSpecial Marine WarningMQT96 min
Jul 11, 8:00 PM CDTSpecial Marine WarningMQT90 min
Jul 11, 9:00 PM CDTSpecial Marine WarningMQT2 hr
Jul 11, 9:25 PM CDTSevere Thunderstorm WarningMQTGogebic, Ontonagon65 min
Jul 11, 10:28 PM CDTSevere Thunderstorm WarningMQTGogebic, Ontonagon62 min
Jul 11, 10:36 PM CDTSpecial Marine WarningMQT54 min
Jul 11, 11:00 PM CDTSpecial Marine WarningMQT60 min
Jul 11, 11:29 PM CDTSevere Thunderstorm WarningMQTGogebic, Houghton, Iron, Ontonagon61 min
Jul 11, 11:54 PM CDTSpecial Marine WarningMQT66 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2008Every severe thunderstorm warning in 2008

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.