Alert archive / Michigan / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 124, NWS Northern Indiana
NWS Northern Indiana issued this severe thunderstorm warning at Jul 29, 1999, 9:47 PM EDT for Branch County, Michigan. It was in force for 33 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
- Jul 29, 1999, 9:47 PM EDT (01:47 UTC)
- Expired
- Jul 29, 1999, 10:20 PM EDT
- In force
- 33 min
- Issued by
- NWS Northern Indiana
- Area
- Whole counties
County Branch County, MI
The radar
The Northern Indiana radar (KIWX), 82 km from the middle of the area, began a volume at 01:47 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 nearest sounding before it
Detroit, MI (KDTX), launched 00:00Z, 1.8 hours before the alert went out and 161 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
- 113 J/kg
- Mixed-layer CIN
- -159 J/kg
- Mixed-layer LCL
- 2353 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 182 m²/s²
- 0-3 km storm-relative helicity
- 312 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
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 Northern Indiana wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 29, 3:32 PM EDT, 6 hours 15 minutes earlier.
Area forecast discussion, Jul 29, 3:32 PM EDT, 6 hours 15 minutes before
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</html>The office that day
Everything else NWS Northern Indiana issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 4:12 PM EDT | Severe Thunderstorm Warning | IWX | LaPorte | 48 min |
| Jul 30, 5:19 PM EDT | Severe Thunderstorm Warning | IWX | Kosciusko | 41 min |
| Jul 30, 5:28 PM EDT | Severe Thunderstorm Warning | IWX | Marshall | 32 min |
| Jul 29, 10:01 PM EDT | Severe Thunderstorm Warning | IWX | Williams | 44 min |
| Jul 29, 10:37 PM EDT | Severe Thunderstorm Warning | IWX | Fulton | 48 min |
| Jul 29, 10:47 PM EDT | Severe Thunderstorm Warning | IWX | Williams | 48 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 1999Every severe thunderstorm warning in 1999
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.