Alert archive / Michigan / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 18, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at Jun 21, 1997, 6:50 PM EDT for Macomb County, Michigan. It was in force for 65 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
- Jun 21, 1997, 6:50 PM EDT (22:50 UTC)
- Expired
- Jun 21, 1997, 7:55 PM EDT
- In force
- 65 min
- Issued by
- NWS Detroit, MI
- Area
- Whole counties
County Macomb County, MI
The radar
The Detroit radar (KDTX), 46 km from the middle of the area, began a volume at 22:51 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 |
|---|---|---|---|
| Jun 21, 7:40 PM EDT | Thunderstorm Wind 55 | Macomb, MI |
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 |
|---|---|---|---|
| Jun 21, 4:00 PM EDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 10.8 hours before the alert went out and 43 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
- 801 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 11 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.
In the hours before
Special weather statement, Jun 21, 4:18 PM EDT, 2 hours 32 minutes before
MIZ047>049-053>055-060>063-068>070-075-076-082-083-220100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 420 PM EDT SAT JUN 21 1997 ...TORNADO WATCH NUMBER 498 HAS BEEN ISSUED FOR ALL OF SOUTHEAST MICHIGAN UNTIL 9 PM... TORNADO WATCH 498 HAS BEEN ISSUED FOR ALL OF SOUTHEAST MICHIGAN UNTIL 9 PM. COMMUNITIES IN THE WATCH INCLUDE MIDLAND... BAD AXE... SAGINAW... FLINT... PORT HURON... HOWELL... PONTIAC... MT CLEMENS... ANN ARBOR... DETROIT... AND MONROE. AT 4 PM... A LINE OF STRONG THUNDERSTORMS EXTENDED FROM SAGINAW BAY SOUTHWEST TO JUST WEST OF KALAMAZOO. THESE STORMS WERE MOVING TO THE EAST NORTHEAST AT 35 MILES AN HOUR. SOME OF THESE THUNDERSTORMS COULD PRODUCE TORNADOES... LARGE HAIL... AND WIND GUSTS OVER 60 MILES AN HOUR. IF YOU ARE IN SOUTHEAST MICHIGAN THIS AFTERNOON AND EVENING... BE ALERT FOR SEVERE WEATHER. IF YOU SEE THEATENING WEATHER APPROACH... MOVE QUICKLY TO SHELTER. KEYES
Special weather statement, Jun 21, 4:20 PM EDT, 2 hours 30 minutes before
MIZ047>049-053>055-060>063-068>070-075-076-082-083-220100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 420 PM EDT SAT JUN 21 1997 ...TORNADO WATCH NUMBER 498 HAS BEEN ISSUED FOR ALL OF SOUTHEAST MICHIGAN UNTIL 9 PM... TORNADO WATCH 498 HAS BEEN ISSUED FOR ALL OF SOUTHEAST MICHIGAN UNTIL 9 PM. COMMUNITIES IN THE WATCH INCLUDE MIDLAND... BAD AXE... SAGINAW... FLINT... PORT HURON... HOWELL... PONTIAC... MT CLEMENS... ANN ARBOR... DETROIT... AND MONROE. AT 4 PM... A LINE OF STRONG THUNDERSTORMS EXTENDED FROM SAGINAW BAY SOUTHWEST TO JUST WEST OF KALAMAZOO. THESE STORMS WERE MOVING TO THE EAST NORTHEAST AT 35 MILES AN HOUR. SOME OF THESE THUNDERSTORMS COULD PRODUCE TORNADOES... LARGE HAIL... AND WIND GUSTS OVER 60 MILES AN HOUR. IF YOU ARE IN SOUTHEAST MICHIGAN THIS AFTERNOON AND EVENING... BE ALERT FOR SEVERE WEATHER. IF YOU SEE THEATENING WEATHER APPROACH... MOVE QUICKLY TO SHELTER. KEYES
The office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 10:59 PM EDT | Severe Thunderstorm Warning | DTX | Lenawee | 46 min |
| Jun 21, 4:31 PM EDT | Severe Thunderstorm Warning | DTX | Shiawassee | 59 min |
| Jun 21, 4:47 PM EDT | Tornado Warning | DTX | Genesee | 43 min |
| Jun 21, 5:31 PM EDT | Tornado Warning | DTX | Lapeer | 44 min |
| Jun 21, 5:48 PM EDT | Tornado Warning | DTX | Genesee | 27 min |
| Jun 21, 6:04 PM EDT | Flash Flood Warning | DTX | Genesee, Lapeer | 2 hr |
| Jun 21, 6:18 PM EDT | Severe Thunderstorm Warning | DTX | Saint Clair, Sanilac | 57 min |
| Jun 21, 6:40 PM EDT | Severe Thunderstorm Warning | DTX | Oakland | 35 min |
| Jun 21, 7:15 PM EDT | Severe Thunderstorm Warning | DTX | Saint Clair | 45 min |
| Jun 21, 7:24 PM EDT | Severe Thunderstorm Warning | DTX | Wayne | 31 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 1997Every severe thunderstorm warning in 1997
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.