Alert archive / Minnesota / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 45, NWS Duluth, MN
NWS Duluth, MN issued this severe thunderstorm warning at Sep 11, 1990, 8:28 PM CDT for Cass County, Itasca County, Minnesota. It was in force for 62 min.
The area
The counties it named.
The facts
- Issued
- Sep 11, 1990, 8:28 PM CDT (01:28 UTC)
- Expired
- Sep 11, 1990, 9:30 PM CDT
- In force
- 62 min
- Issued by
- NWS Duluth, MN
- Area
- Whole counties
Counties Cass County, MN, Itasca County, MN
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Minneapolis, MN (KSTC), launched 00:00Z, 1.5 hours before the alert went out and 266 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
- 2675 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 1580 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 159 m²/s²
- 0-3 km storm-relative helicity
- 278 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 18.1
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.
In the hours before
Special weather statement, Sep 11, 5:48 PM CDT, 2 hours 40 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE INTERNATIONAL FALLS MN 545 PM CDT TUE SEP 11 1990 AT 530 PM CDT...RADAR INDICATED SEVERAL HEAVY THUNDERSTORMS ALONG THE MINNESOTA/CANADIAN BORDER NEAR INTERNATIONAL FALLS AND EXTENDING SOUTHWEST TOWARD FARGO. THESE STORMS ARE MOVING TO THE EAST AT 30 MPH AND WILL MOVE OVER RAINY LAKE AREA...CLEAR WATER AND SOUTHWEST BELTRAMI COUNTIES BY 630 PM CDT. THESE STORMS MAY CONTAIN HEAVY RAIN...STRONG GUSTY WINDS...SMALL HAIL... AND DANGEROUS LIGHTENING. BOATERS AND OTHER OUTDOOR ENTHUSIASTS...SHOULD SEEK SHELTER IF THUNDERSTORMS APPROACH. KEEP TUNED TO NOAA WEATHER RADIO...YOUR FAVORITE AM/FM RADIO OR TV STATION IN THE EVENT FURTHER STAT9EMENTS ARE REQUIRED. CARROLL
Special weather statement, Sep 11, 5:50 PM CDT, 2 hours 38 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE INTERNATIONAL FALLS MN 545 PM CDT TUE SEP 11 1990 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR A LARGE PORTION OF CENTRAL AND NORTHERN MINNESOTA UNTIL 1100 PM CDT... AT 530 PM CDT...RADAR INDICATED SEVERAL HEAVY THUNDERSTORMS ALONG THE MINNESOTA/CANADIAN BORDER NEAR INTERNATIONAL FALLS AND EXTENDING SOUTHWEST TOWARD FARGO. THESE STORMS ARE MOVING TO THE EAST AT 30 MPH AND WILL MOVE OVER RAINY LAKE AREA...CLEAR WATER AND SOUTHWEST BELTRAMI COUNTIES BY 630 PM CDT. THESE STORMS MAY CONTAIN HEAVY RAIN...STRONG GUSTY WINDS...SMALL HAIL... AND DANGEROUS LIGHTENING. BOATERS AND OTHER OUTDOOR ENTHUSIASTS...SHOULD SEEK SHELTER IF THUNDERSTO<RMS APPROACH. KEEP TUNED TO NOAA WEATHER RADIO...YOUR FAVORITE AM/FM RADIO OR TV STATION IN THE EVENT FURTHER STATEMENTS ARE REQUIRED. CARROLL
Special weather statement, Sep 11, 7:13 PM CDT, 1 hour 15 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DULUTH, MN 705 PM CDT TUE SEP 11 1990 ...A SEVERE THUNDERSTORM WATCH FOR PARTS OF NORTH AND CENTRAL WISCONSIN UNTIL 11 PM CDT... AT 7 OCLOCK THIS EVENING THUNDERSTORMS WITH HEAVY RAIN AND SMALL HAIL WERE OCURRING IN EAST CENTRAL WASHBURN COUNTY AND WEST CENTRAL SAWYER COUNTY OF NORTHWEST WISCONSIN. NO MOVEMENT WAS EVIDENT AS THESE STORMS HAD DEVELOPED SINCE 640 PM THIS EVENING. THESE STORMS WERE 10 MILES SOUTHWEST AND 15 MILES SOUTHEAST OF HAYWARD. THE SEVERE THUNDERSTORMS PRODUCING LARGE HAIL AND DAMAGING TORNADO WINDS WERE 20 TO 30 MILES SOUTH OF THIS AREA FROM CUMBERLAND TO EAST OF RICE LAKE IN NORTHEAST BARRON AND NORTHWEST RUSK COUNTIES. THUNDERSTORMS IN THIS AREA OF WISCONSIN HAVE THE POTENTIAL TO PRODUCE SEVERE WEATHER. CHRISTENSON
Special weather statement, Sep 11, 7:28 PM CDT, 1 hour before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE INTERNATIONAL FALLS MN 725 PM CDT TUE SEP 11 1990 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR A LARGE PORTION OF CENTRAL AND NORTHERN MINNESOTA UNTIL 1100 PM CDT... AT 720 PM CDT...RADAR INDICATED A LINE OF HEAVY THUNDERSTORMS JUST EAST OF INTERNATIONAL FALLS TO BEMIDJI. THESE STORMS ARE MOVING TO THE EAST AT 25 MPH AND WILL CONTINUE THROUGH KOOCHICING COUNTY OVER THE NEXT FEW HOURS. THESE STORMS MAY CONTAIN HEAVY RAIN...STRONG GUSTY WINDS...SMALL HAIL... AND DANGEROUS LIGHTENING. BOATERS AND OTHER OUTDOOR ENTHUSIASTS...SHOULD SEEK SHELTER IF THUNDERSTORMS APPROACH. KEEP TUNED TO NOAA WEATHER RADIO...YOUR FAVORITE AM/FM RADIO OR TV STATION IN THE EVENT FURTHER STATEMENTS ARE REQUIRED. SCW
Special weather statement, Sep 11, 7:38 PM CDT, 50 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DULUTH, MN 735 PM CDT TUE SEP 11 1990 ...A SEVERE THUNDERSTORM WATCH FOR PARTS OF NORTH AND CENTRAL WISCONSIN UNTIL 11 PM CDT... ...A SEVERE THUNDERSTORM WATCH FOR PART OF NORTH AND NORTHEAST MINNESOTA UNTIL 11 PM CDT THIS EVENING... AT 730 PM CDT SHOWERS AND THUNDERSTORMS WERE DEVELOPING IN A TRIANGLE BETWEEN BEMIDJI..BLACKDUCK AND WINNIBIGOSHISH IN NORTHCENTRAL MINNESOTA. THESE STORMS ARE CAPABLE OF PRODUCING WIND GUSTS TO 40 MILES AN HOUR ALONG WITH SMALL HAIL AND LIGHTNING AS THEY MOVE EAST INTO ITASCA COUNTY AND EXTREME NORTH CASS COUNTY...CROSSING LAKE WINNIBIGOSHISH. OTHER THUNDERSTORMS PRODUCING SMALL HAIL AND HEAVY RAIN WERE FROM THE NORTHERN EDGE OF CRANE LAKE NEAR THE CANADIAN BORDER BACK WEST NORTHWEST INTO INTERNATIONAL FALLS. THESE STORMS WERE SAGGING SOUTHEAST AS THEY CONTINUED TO DIE OFF AND REDEVELOP...WITH INDIVIDUAL STORMS MOVING EAST AT 30 MILES AN HOUR. ..J.CHRISTENSON..
Local storm report, Sep 11, 7:54 PM CDT, 34 minutes before
LOCAL STORM REPORT SUMMARY
NATIONAL WEATHER SERVICE INTERNATIONAL FALLS MN
755 PM CDT TUE SEP 11 1990
608 PM CDT...3/4 INCH HAIL REPORTED AT INTERNATIONAL FALLS, MN
...DOWNTOWN.
CARROLLThe office that day
Everything else NWS Duluth, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 8:18 PM CDT | Severe Thunderstorm Warning | DLH | Koochiching, Saint Louis | 57 min |
| Sep 11, 9:25 PM CDT | Severe Thunderstorm Warning | DLH | Itasca | 65 min |
| Sep 11, 7:59 PM CDT | Tornado Warning | DLH | Sawyer, Washburn | 61 min |
| Sep 11, 8:50 PM CDT | Severe Thunderstorm Warning | DLH | Sawyer, Washburn | 55 min |
| Sep 11, 9:50 PM CDT | Severe Thunderstorm Warning | DLH | Bayfield, Douglas, Sawyer, Washburn | 55 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 1990Every severe thunderstorm warning in 1990
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.