Alert archive / Minnesota / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 69, NWS Duluth, MN
NWS Duluth, MN issued this severe thunderstorm warning at Jul 18, 2001, 10:41 PM CDT for Itasca County, Koochiching County, Minnesota. It was in force for 64 min. 1 report 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
- Jul 18, 2001, 10:41 PM CDT (03:41 UTC)
- Expired
- Jul 18, 2001, 11:45 PM CDT
- In force
- 64 min
- Issued by
- NWS Duluth, MN
- Area
- Whole counties
Counties Itasca County, MN, Koochiching County, MN
The radar
The Duluth radar (KDLH), 162 km from the middle of the area, began a volume at 03:45 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 18, 11:41 PM CDT | Thunderstorm Wind 50 E | Grand Rapids, MN | A tree and many branches were blown down. The wind speed is estimated. |
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 |
|---|---|---|---|
| Jul 18, 10:00 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 3.7 hours before the alert went out and 83 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
- 2275 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 1506 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 202 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 9.1
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.
NWS Duluth, MN wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 18, 9:00 PM CDT, 1 hour 41 minutes earlier.
Area forecast discussion, Jul 18, 9:00 PM CDT, 1 hour 41 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DULUTH MN 900 PM CDT WED JUL 18 2001 WILL HOLD OFF A LITTLE ON EVENING UPDATE DUE TO POTENTIAL WATCH REPLACEMENT OVER NORTHERN MINNESOTA BY 10 PM. THE STORMS HAVE BEEN SLOW TO MOVE IN DURING THE EVENING...BUT HAVE BEGUN TO PUSH EASTWARD INTO FAR NORTHERN KOOCHICHING COUNTY. SHOULD BE A LOT OF ACTION UP THERE FOR THE REMAINDER OF THE EVENING...WITH THE THUNDERSTORM ACTIVITY PUSHING INTO THE REST OF NE MN VERY SLOWLY. MAY PUSH BACK THE TIMING OF SOME OF THE STORMS IN THE EVENING UPDATE. LOOKS LIKE THE MAIN ACTION WILL MOVE INTO NC/NE MN AND MAY ARC INTO NW WI LATER IN THE NIGHT AS A SEVERE MCS DEVELOPS. WIND DAMAGE AND LARGE HAIL APPEAR TO BE THE MAIN THREAT OVERNIGHT. .DLH...NONE. DAP
The office that day
Everything else NWS Duluth, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 8:47 PM CDT | Severe Thunderstorm Warning | DLH | Koochiching | 58 min |
| Jul 18, 9:23 PM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 67 min |
| Jul 18, 9:44 PM CDT | Severe Thunderstorm Warning | DLH | Koochiching | 61 min |
| Jul 18, 11:23 PM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 67 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2001Every severe thunderstorm warning in 2001
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; radar from the NEXRAD Level II archive.