Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 39, NWS Duluth, MN
NWS Duluth, MN issued this severe thunderstorm warning at May 15, 1998, 7:00 PM CDT for Bayfield County, Douglas County, Sawyer County, Wisconsin. It was in force for 60 min. 6 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 15, 1998, 7:00 PM CDT (00:00 UTC)
- Expired
- May 15, 1998, 8:00 PM CDT
- In force
- 60 min
- Issued by
- NWS Duluth, MN
- Area
- Whole counties
Counties Bayfield County, WI, Douglas County, WI, Sawyer County, WI
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 15, 7:10 PM CDT | Thunderstorm Wind 55 | Solon Springs, WI | |
| May 15, 7:15 PM CDT | Thunderstorm Wind 55 | Hawthorne, WI | |
| May 15, 7:15 PM CDT | Thunderstorm Wind 65 | Bennett, WI | |
| May 15, 7:25 PM CDT | Thunderstorm Wind 65 | Maple, WI | |
| May 15, 7:35 PM CDT | Thunderstorm Wind 50 | Iron River, WI | |
| May 15, 8:00 PM CDT | Thunderstorm Wind 60 | Bayfield, WI |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
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 15, 4:30 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 0.0 hours before the alert went out and 237 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
- 1770 m above ground
- 0-6 km bulk shear
- 69 kt
- 0-1 km storm-relative helicity
- 128 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 15, 2:00 PM CDT, 5 hours earlier.
Area forecast discussion, May 15, 2:00 PM CDT, 5 hours before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DULUTH MN 200 PM CDT FRI MAY 15 1998 LOW PRESSURE IS SUPPOSED TO MOVE NORTHWARD THROUGH EASTERN MN TONIGHT. THE ETA IS THE WEAKEST...FURTHEST WEST...AND FASTEST. THE NGM MOVES THE LOW RIGHT OVER DLH...CENTERING IT HALFWAY UP THE U.S. NORTH SHORE SATURDAY MORNING. RAIN IS CERTAIN AND THUNDER IS CEERTAIN WITH A STRONG WEST WIND EXPECTED TO FOLLOW. ATTM...A COMPLEX OF MERGING CELLS IS MOVING NORTH INTO SOUTHERN MN. THE MOST GROWTH AND LIGHTNING IS IN WEST-CENTRAL IOWA...WITH THE LARGE CIRRUS SHIELD OVER THE SOUTHERN HALF OF MN WARMING. THE RUC HAS SURFACE 70F /21C/ DEW POINTS SWEEPING UP THROUGH IL AND WI... THEN SPREADING NORTHWESTWARD INTO THE DLH AREA THIS EVENING. THE LACK OF STORM DEVELOPMENT ALONG THAT PATH INDICATES THAT THE MOISTURE WILL ACTUALLY GET HERE AND FEED STORMS IN THIS AREA. EOM
In the hours before
Special weather statement, May 15, 5:04 PM CDT, 1 hour 56 minutes before
MNZ010>012-019>021-025-026-033>038-WIZ001>004-006>009-160000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DULUTH MN 504 PM CDT FRI MAY 15 1998 ...SEVERE LINE OF THUNDERSTORMS TO MOVE INTO THE NORTHLAND... AT 500 PM CDT...THE DULUTH DOPPLER RADAR HAD LOCATED A LINE OF SEVERE THUNDERSTORMS MOVING NORTHWARD THROUGH THE NORTHERN TWIN CITIES METRO AREA AT OVER 65 MILES AN HOUR. THESE THUNDERSTORMS HAVE HAD A HISTORY OF PRODUCING WINDS GUSTS TO 90 MILES AN HOUR AS THEY HAVE PASSED THROUGH. LARGE HAIL AND A POSSIBILITY OF TORNADOES ALSO EXISTS WITH THESE THUNDERSTORMS. EMERGENCY MANAGERS AND COUNTY LAW ENFORCEMENT OFFICIALS MAY EXPECT A NUMBER OF SEVERE WEATHER WARNINGS TO BE ISSUED FOR COUNTIES ACROSS THE NORTHLAND THROUGH THE EVENING HOURS. THE LINE OF THUNDERSTORMS IS EXPECTED TO ENTER THE DULUTH/SUPERIOR AREA BETWEEN 630 PM AND 700 PM. A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR NORTH CENTRAL MINNESOTA THROUGH 900 PM WHILE...A TORNADO WATCH IS IN EFFECT UNTIL 10 PM FOR A LARGE PORTION OF NORTHEASTERN MINNESOTA AND NORTHWESTERN WISCONSIN. PERSONS ACROSS THE NORTHLAND SHOULD REMAIN ON ALERT AND BE PREPARED TO MOVE TO SAFE SHELTER IF THREATENING WEATHER APPROACHES. BRAMER
Special weather statement, May 15, 5:04 PM CDT, 1 hour 56 minutes before
MNZ010>012-019>021-025-026-033>038-WIZ001>004-006>009-160000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DULUTH MN 504 PM CDT FRI MAY 15 1998 ...SEVERE LINE OF THUNDERSTORMS TO MOVE INTO THE NORTHLAND... AT 500 PM CDT...THE DULUTH DOPPLER RADAR HAD LOCATED A LINE OF SEVERE THUNDERSTORMS MOVING NORTHWARD THROUGH THE NORTHERN TWIN CITIES METRO AREA AT OVER 65 MILES AN HOUR. THESE THUNDERSTORMS HAVE HAD A HISTORY OF PRODUCING WINDS GUSTS TO 90 MILES AN HOUR AS THEY HAVE PASSED THROUGH. LARGE HAIL AND A POSSIBILITY OF TORNADOES ALSO EXISTS WITH THESE THUNDERSTORMS. EMERGENCY MANAGERS AND COUNTY LAW ENFORCEMENT OFFICIALS MAY EXPECT A NUMBER OF SEVERE WEATHER WARNINGS TO BE ISSUED FOR COUNTIES ACROSS THE NORTHLAND THROUGH THE EVENING HOURS. THE LINE OF THUNDERSTORMS IS EXPECTED TO ENTER THE DULUTH/SUPERIOR AREA BETWEEN 630 PM AND 700 PM. A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR NORTH CENTRAL MINNESOTA THROUGH 900 PM WHILE...A TORNADO WATCH IS IN EFFECT UNTIL 10 PM FOR A LARGE PORTION OF NORTHEASTERN MINNESOTA AND NORTHWESTERN WISCONSIN. PERSONS ACROSS THE NORTHLAND SHOULD REMAIN ON ALERT AND BE PREPARED TO MOVE TO SAFE SHELTER IF THREATENING WEATHER APPROACHES. BRAMER
The office that day
Everything else NWS Duluth, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 15, 7:00 PM CDT | Severe Thunderstorm Warning | DLH | Carlton, Saint Louis | 60 min |
| May 15, 7:28 PM CDT | Tornado Warning | DLH | Saint Louis | 32 min |
| May 15, 7:32 PM CDT | Severe Thunderstorm Warning | DLH | Koochiching | 63 min |
| May 15, 7:42 PM CDT | Tornado Warning | DLH | Saint Louis | 33 min |
| May 15, 7:55 PM CDT | Severe Thunderstorm Warning | DLH | Itasca, Saint Louis | 60 min |
| May 15, 8:32 PM CDT | Severe Thunderstorm Warning | DLH | Cook, Lake, Saint Louis | 63 min |
| May 15, 9:27 PM CDT | Severe Thunderstorm Warning | DLH | Cook | 63 min |
| May 15, 7:02 PM CDT | Severe Thunderstorm Warning | DLH | Washburn | 33 min |
| May 15, 7:54 PM CDT | Tornado Warning | DLH | Bayfield | 36 min |
| May 15, 7:56 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Iron, Price | 59 min |
| May 15, 8:11 PM CDT | Tornado Warning | DLH | Ashland | 34 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 1998Every severe thunderstorm warning in 1998
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.