Alert archive / Oregon / Mesoscale Discussions in 2004
Mesoscale Discussion 1736
The Storm Prediction Center issued this mesoscale discussion at Jul 19, 2004, 2:49 PM PDT for 6 counties in Idaho; 9 counties in Oregon; 9 counties in Washington. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 19, 2004, 2:49 PM PDT (21:49 UTC)
- Expired
- Jul 19, 2004, 5:15 PM PDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 24 counties
Benewah County, ID, Clearwater County, ID, Latah County, ID, Lewis County, ID, Nez Perce County, ID, Shoshone County, ID, Baker County, OR, Crook County, OR, Gilliam County, OR, Grant County, OR, Morrow County, OR, Umatilla County, OR, Union County, OR, Wallowa County, OR, Wheeler County, OR, Adams County, WA, Asotin County, WA, Benton County, WA, Columbia County, WA, Franklin County, WA, Garfield County, WA, Spokane County, WA, Walla Walla County, WA, Whitman County, WA
The radar
The Pendleton radar (KPDT), 60 km from the middle of the area, began a volume at 21:49 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Spokane, WA (KOTX), launched 12:00Z, 9.8 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
- 291 J/kg
- Mixed-layer CIN
- -134 J/kg
- Mixed-layer LCL
- 1292 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 83 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 11:16 AM PDT | Mesoscale Discussion | SPC | Bonner, Clearwater, Idaho, Shoshone | 2 hr |
| Jul 19, 3:15 PM PDT | Severe Thunderstorm Watch | SPC | Adams, Benewah, Clearwater, Gem, Idaho, Latah and 6 more | 7 hr |
Nearby
Mesoscale Discussions in Oregon, 2004Mesoscale Discussions in Washington, 2004Mesoscale Discussions in Idaho, 2004Every mesoscale discussion in 2004
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.