Alert archive / Minnesota / Severe Thunderstorm Warnings in 2004
Severe Thunderstorm Warning 29, NWS Duluth, MN
NWS Duluth, MN issued this severe thunderstorm warning at Apr 18, 2004, 5:53 PM CDT for Lake County, Minnesota. It was in force for 52 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
- Apr 18, 2004, 5:53 PM CDT (22:53 UTC)
- Expired
- Apr 18, 2004, 6:45 PM CDT
- In force
- 52 min
- Issued by
- NWS Duluth, MN
- Area
- Counties, with a storm outline in the text
County Lake County, MN
The radar
The Duluth radar (KDLH), 97 km from the middle of the area, began a volume at 22:56 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 |
|---|---|---|---|
| Apr 18, 1:40 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
International Fa, MN (KINL), launched 12:00Z, 10.9 hours before the alert went out and 183 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1153 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 245 m²/s²
- 0-3 km storm-relative helicity
- 254 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Apr 18, 3:05 PM CDT, 2 hours 48 minutes earlier.
Area forecast discussion, Apr 18, 3:05 PM CDT, 2 hours 48 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DULUTH MN 305 PM CDT SUN APR 18 2004 .DISCUSSION...MAIN FOCUS IS ON SEVERE WEATHER POTENTIAL LATE THIS AFTERNOON AND THIS EVENING. SEVERE WEATHER HAS BEEN PROMINENT DURING THE DAY...WITH DAMAGING WINDS INITIALLY, AND UP TO 2 INCH HAIL WITH THE LATER STORMS. SUPERCELLS DEVELOPED IN THE LAST 3 HOURS OF THE EVENT, WITH ROTATION EVIDENT IN MANY OF THE STORMS. NOT A GOOD VORTICITY GENERATION POTENTIAL (VGP) SIGNAL, SO STORM RELATIVE HELICITY WAS NOT EFFICIENTLY INGESTED INTO THE STORMS FROM THE SURFACE. THIS MIGHT HAVE KEPT THE CIRCULATIONS FROM BECOMING SURFACE BASED. AS FOR THE NEXT STAGE OF THE EVENT, THE CONVECTIVE INITIATION HAS ALREADY BEGUN ACROSS CENTRAL AND SOUTHERN MN. SHEAR PROFILES, AND INSTABILITY PARAMETERS ARE INDICATING THE STRONG POTENTIAL FOR SUPERCELL THUNDERSTORMS THIS AFTERNOON AND EVENING, WITH TORNADOES A STRONG THREAT. A TORNADO WATCH HAS BEEN ISSUED THROUGH 8 PM FOR MOST OF THE CWA. THE STORM PREDICTION CENTER (SPC) DISCUSSED THE STRONG MARINE LAYER NORTH OF THE ADVANCING WARM FRONT, AND THAT IT MAY REDUCE THE CHANCES OF TORNADOES FARTHER INTO THE ARROWHEAD...BUT THE TORNADO THREAT REMAINS EVERYWHERE, NONE THE LESS. THIS IMPENDING SEVERE WEATHER EVENT IS BEING HIGHLIGHTED AS A PARTICULARLY DANGEROUS SITUATION (PDS), BY THE SPC. STORM WILL CONTINUE OVERNIGHT...AS THE LOW PRESSURE MOVES RAPIDLY NORTHEAST ALONG THE WARM FRONT INTO NORTHWEST WISCONSIN BY THIS EVENING...AND ALL THE WAY NORTH OF LAKE SUPERIOR BY MIDNIGHT. HEAVY RAINS ARE LIKELY WITH THE STRONGEST STORMS...ALONG WITH HAIL, DAMAGING WINDS, AND TORNADOES. RAINFALL TOTALS UP TO 2 INCHES ARE POSSIBLE. AREAS OF DENSE FOG ARE POSSIBLE MONDAY MORNING DUE TO THE ABUNDANT SURFACE MOISTURE FROM THIS SYSTEM. POST FRONTAL PRECIPITATION WILL CONTINUE INTO MONDAY MORNING BEFORE A STRONG SUBSIDENCE REGION AND HIGH PRESSURE SHUT THINGS DOWN. CLEARING SKIES ARE EXPECTED MONDAY AFTERNOON. THE NEXT SYSTEM TO BRING PRECIP WILL HOLD OFF UNTIL TUESDAY NIGHT...AS LOW PRESSURE LIFTS INTO SOUTHERN MINNESOTA. && .DLH...WATCHES/WARNINGS/ADVISORIES MN...TORNADO WATCH UNTIL 8 PM FOR AREAS SOUTH AND EAST OF A LINE FROM WALKER TO GRAND MARAIS. WI...TORNADO WATCH UNTIL 8 PM FOR ALL OF NW WIS. SHIMON
Hazardous weather outlook, Apr 18, 7:30 AM CDT, 10 hours 23 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DULUTH MN 730 AM CDT SUN APR 18 2004 MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-191230- ASHLAND-BAYFIELD-BURNETT-C. ST. LOUIS-CROW WING-DOUGLAS-IRON- KOOCHICHING-N. AITKIN-N. CASS-N. ITASCA-N. LAKE/N. COOK-N. ST. LOUIS- PINE-PRICE-S. AITKIN-S. CASS-S. COOK/LAKESHORE-S. ITASCA- S. LAKE/LAKESHORE-S. ST. LOUIS/CARLTON-SAWYER-WASHBURN- 730 AM CDT SUN APR 18 2004 ...MODERATE RISK OF SEVERE STORMS TODAY AND TONIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEASTERN MINNESOTA AND NORTHWESTERN WISCONSIN. .DAY ONE...TODAY AND TONIGHT A SIGNIFICANT SEVERE WEATHER OUTBREAK IS SHAPING UP FOR MUCH OF THE NORTHLAND TODAY AND TONIGHT. THE BEST CHANCE OF SEVERE WEATHER WILL BE ACROSS EAST CENTRAL MINNESOTA AND NORTHWESTERN WISCONSIN. GOLF BALL SIZE HAIL OR LARGER...DAMAGING WINDS IN EXCESS OF 60 MPH AND TORRENTIAL DOWNPOURS ARE EXPECTED WITH SOME OF THE STORMS. OF GREATEST CONCERN TODAY WILL BE THE THREAT OF TORNADOES. ALL THE FORECAST PARAMETERS INDICATE THAT THERE IS A GOOD POSSIBILITY OF TORNADOES...ESPECIALLY THIS AFTERNOON AND EVENING. BE SURE TO MONITOR FOR POSSIBLE WATCHES AND WARNINGS AS THIS SEVERE WEATHER EVENT UNFOLDS. ASIDE FROM THE SEVERE WEATHER...A SMALL CRAFT ADVISORY IS IN EFFECT FOR THE NEAR SHORE WATERS OF WESTERN LAKE SUPERIOR. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION IS POSSIBLE AT ANY POINT TODAY...BUT IT IS LIKELY THIS AFTERNOON AND EVENING. && MORE INFORMATION MAY BE OBTAINED AT THE FOLLOWING URL: HTTP://WWW.CRH.NOAA.GOV/DLH DAP
In the hours before
Local storm report, Apr 18, 5:03 PM CDT, 50 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
503 PM CDT SUN APR 18 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0411 PM HAIL 3 S DANBURY 45.96N 92.37W
04/18/2004 1.00 INCH BURNETT WI TRAINED SPOTTER
&&
EOMLocal storm report, Apr 18, 5:23 PM CDT, 30 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
523 PM CDT SUN APR 18 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0411 PM HAIL DULUTH 46.78N 92.12W
04/18/2004 0.75 INCH SOUTHEAST ST. LOUI MN NWS EMPLOYEE
&&
EOMLocal storm report, Apr 18, 5:35 PM CDT, 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
535 PM CDT SUN APR 18 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0411 PM TSTM WND DMG 3 SE GRANTSBURG 45.75N 92.64W
04/18/2004 BURNETT WI TRAINED SPOTTER
BARN BLOWN DOWN
&&
EOMLocal storm report, Apr 18, 5:36 PM CDT, 17 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
536 PM CDT SUN APR 18 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0411 PM HAIL HERTEL 45.81N 92.18W
04/18/2004 1.25 INCH BURNETT WI TRAINED SPOTTER
&&
EOMLocal storm report, Apr 18, 5:38 PM CDT, 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
538 PM CDT SUN APR 18 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0411 PM HAIL 1 E DANBURY 46.01N 92.35W
04/18/2004 2.75 INCH BURNETT WI AMATEUR RADIO
&&
EOMLocal storm report, Apr 18, 5:40 PM CDT, 13 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
540 PM CDT SUN APR 18 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0411 PM HAIL DULUTH 46.78N 92.12W
04/18/2004 0.75 INCH SOUTHEAST ST. LOUI MN NWS EMPLOYEE
&&
EOMThe office that day
Everything else NWS Duluth, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 18, 2:20 AM CDT | Severe Thunderstorm Warning | DLH | Pine | 55 min |
| Apr 18, 3:17 AM CDT | Severe Thunderstorm Warning | DLH | Pine | 58 min |
| Apr 18, 7:18 AM CDT | Severe Thunderstorm Warning | DLH | Pine | 27 min |
| Apr 18, 8:01 AM CDT | Severe Thunderstorm Warning | DLH | Cass | 44 min |
| Apr 18, 8:39 AM CDT | Severe Thunderstorm Warning | DLH | Cass, Crow Wing | 51 min |
| Apr 18, 8:42 AM CDT | Severe Thunderstorm Warning | DLH | Itasca | 33 min |
| Apr 18, 9:47 AM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 28 min |
| Apr 18, 10:07 AM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 38 min |
| Apr 18, 10:33 AM CDT | Severe Thunderstorm Warning | DLH | Lake | 42 min |
| Apr 18, 11:06 AM CDT | Special Marine Warning | DLH | 54 min | |
| Apr 18, 12:13 PM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 62 min |
| Apr 18, 12:58 PM CDT | Severe Thunderstorm Warning | DLH | Lake | 62 min |
| Apr 18, 1:35 PM CDT | Severe Thunderstorm Warning | DLH | Cook | 55 min |
| Apr 18, 3:36 PM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 39 min |
| Apr 18, 3:59 PM CDT | Tornado Warning | DLH | Pine | 61 min |
| Apr 18, 4:13 PM CDT | Severe Thunderstorm Warning | DLH | Lake, Saint Louis | 62 min |
| Apr 18, 4:30 PM CDT | Special Marine Warning | DLH | 60 min | |
| Apr 18, 5:13 PM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 32 min |
| Apr 18, 5:31 PM CDT | Special Marine Warning | DLH | 89 min | |
| Apr 18, 5:31 PM CDT | Special Marine Warning | DLH | 89 min | |
| Apr 18, 2:11 AM CDT | Severe Thunderstorm Warning | DLH | Sawyer | 64 min |
| Apr 18, 3:37 AM CDT | Severe Thunderstorm Warning | DLH | Burnett, Douglas, Washburn | 53 min |
| Apr 18, 4:00 AM CDT | Severe Thunderstorm Warning | DLH | Bayfield | 30 min |
| Apr 18, 4:43 AM CDT | Severe Thunderstorm Warning | DLH | Sawyer | 32 min |
| Apr 18, 4:56 AM CDT | Severe Thunderstorm Warning | DLH | Douglas, Washburn | 34 min |
| Apr 18, 5:20 AM CDT | Severe Thunderstorm Warning | DLH | Ashland, Sawyer | 55 min |
| Apr 18, 7:33 AM CDT | Severe Thunderstorm Warning | DLH | Washburn | 27 min |
| Apr 18, 7:56 AM CDT | Severe Thunderstorm Warning | DLH | Sawyer | 34 min |
| Apr 18, 8:27 AM CDT | Severe Thunderstorm Warning | DLH | Ashland, Sawyer | 48 min |
| Apr 18, 9:10 AM CDT | Severe Thunderstorm Warning | DLH | Price | 35 min |
| Apr 18, 4:41 PM CDT | Tornado Warning | DLH | Burnett | 64 min |
| Apr 18, 5:23 PM CDT | Tornado Warning | DLH | Washburn | 67 min |
| Apr 18, 5:54 PM CDT | Tornado Warning | DLH | Sawyer | 66 min |
| Apr 18, 6:32 PM CDT | Severe Thunderstorm Warning | DLH | Ashland | 43 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2004Every severe thunderstorm warning in 2004
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.