Alert archive / Idaho / Mesoscale Discussions in 2024
Mesoscale Discussion 1221
The Storm Prediction Center issued this mesoscale discussion at Jun 9, 2024, 5:28 PM MDT for Ada County, Canyon County, Owyhee County, Idaho; Harney County, Lake County, Malheur County, Oregon. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 9, 2024, 5:28 PM MDT (23:28 UTC)
- Expired
- Jun 9, 2024, 7:30 PM MDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch unlikely
- Chance of a watch
- 20%
Counties Ada County, ID, Canyon County, ID, Owyhee County, ID, Harney County, OR, Lake County, OR, Malheur County, OR
The radar
The Boise radar (KCBX), 203 km from the middle of the area, began a volume at 23:28 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
Boise Airport, ID (KBOI), launched 12:00Z, 11.5 hours before the alert went out and 210 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
- 2757 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- -137 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
839
ACUS11 KWNS 092328
SWOMCD
SPC MCD 092328
NVZ000-IDZ000-ORZ000-CAZ000-100130-
Mesoscale Discussion 1221
NWS Storm Prediction Center Norman OK
0628 PM CDT Sun Jun 09 2024
Areas affected...Southeast OR into southwest ID and extreme northern
NV
Concerning...Severe potential...Watch unlikely
Valid 092328Z - 100130Z
Probability of Watch Issuance...20 percent
SUMMARY...Isolated hail and severe gusts are possible into early
evening.
DISCUSSION...Scattered thunderstorms are ongoing across southeast OR
and vicinity, in advance of a shortwave trough moving across the
Pacific Northwest. MLCAPE of up to 500 J/kg and moderate deep-layer
shear are supporting occasionally organized storm structures, with a
couple of stronger cells noted across Malheur County, Oregon. Those
cells will eventually encounter stronger MLCINH to the northeast,
but isolated hail and severe gusts will remain possible in the short
term. Other less-organized convection is ongoing farther west into
south-central OR, and also moving out of far northern NV. A stronger
cell or two could develop across those areas as well, but even the
ongoing less-organized convection could pose a threat of isolated
strong to severe gusts, especially where the environment remains
rather warm and well mixed.
..Dean/Bunting.. 06/09/2024
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...BOI...LKN...REV...MFR...
LAT...LON 41641905 41901981 42172057 42612086 43252035 43541891
43971710 43851605 43151585 41951536 41731709 41631876
41641905SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 9, 2:32 PM MDT | Mesoscale Discussion | SPC | Bingham, Blaine, Butte, Camas, Cassia, Clark and 11 more | 118 min |
Nearby
Mesoscale Discussions in Idaho, 2024Mesoscale Discussions in Oregon, 2024Every mesoscale discussion in 2024
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.