Alert archive / Minnesota / Mesoscale Discussions in 2019
Mesoscale Discussion 1421
The Storm Prediction Center issued this mesoscale discussion at Jul 8, 2019, 10:13 PM CDT for 10 counties in Minnesota. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 8, 2019, 10:13 PM CDT (03:13 UTC)
- Expired
- Jul 9, 2019, 12:15 AM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
Counties Becker County, MN, Beltrami County, MN, Cass County, MN, Clearwater County, MN, Hubbard County, MN, Itasca County, MN, Koochiching County, MN, Lake of the Woods County, MN, Mahnomen County, MN, Wadena County, MN
The radar
The Fargo/Grand Forks radar (KMVX), 178 km from the middle of the area, began a volume at 03:12 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
International Fa, MN (KINL), launched 00:00Z, 3.2 hours before the alert went out and 165 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
- 719 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 1585 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 103 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.6
The text
As transmitted.
995 ACUS11 KWNS 090313 SWOMCD SPC MCD 090313 MNZ000-090515- Mesoscale Discussion 1421 NWS Storm Prediction Center Norman OK 1013 PM CDT Mon Jul 08 2019 Areas affected...Northern MN Concerning...Severe Thunderstorm Watch 501... Valid 090313Z - 090515Z The severe weather threat for Severe Thunderstorm Watch 501 continues. SUMMARY...Strong storms will spread southeast across ww501 over the next few hours. Gusty winds are the primary threat. DISCUSSION...Expanding cold pool across eastern ND/northwest MN should contribute to southeast movement of upper Red River Valley squall line. This cluster of storms has matured into a healthy MCS that should persist into the early-morning hours as it sags southeast across ww501. Veered LLJ should aid this movement and gusty winds are the primary threat. ..Darrow.. 07/09/2019 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...DLH...FGF... LAT...LON 46579637 49079562 49079276 46579362 46579637
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 7:41 PM CDT | Severe Thunderstorm Watch | SPC | Becker, Beltrami, Cass, Clearwater, Hubbard, Itasca and 6 more | 6 hr |
| Jul 8, 8:20 PM CDT | Mesoscale Discussion | SPC | Clay, Marshall, Norman, Pennington, Polk, Red Lake | 55 min |
| Jul 9, 3:01 PM CDT | Mesoscale Discussion | SPC | Clay, Wilkin | 119 min |
Nearby
Mesoscale Discussions in Minnesota, 2019Every mesoscale discussion in 2019
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.