Alert archive / Minnesota / Mesoscale Discussions in 2019

Mesoscale Discussion 1504

July 17, 201930 counties in Minnesota; 10 counties in North Dakota; 4 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 17, 2019, 3:29 PM CDT for 30 counties in Minnesota; 10 counties in North Dakota; 4 counties in South Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 17, 2019, 3:29 PM CDT (20:29 UTC)
Expired
Jul 17, 2019, 5:30 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
60%
All 44 counties

Becker County, MN, Beltrami County, MN, Big Stone County, MN, Cass County, MN, Clay County, MN, Clearwater County, MN, Crow Wing County, MN, Douglas County, MN, Grant County, MN, Hubbard County, MN, Itasca County, MN, Kittson County, MN, Koochiching County, MN, Lac qui Parle County, MN, Lake of the Woods County, MN, Mahnomen County, MN, Marshall County, MN, Norman County, MN, Otter Tail County, MN, Pennington County, MN, Polk County, MN, Pope County, MN, Red Lake County, MN, Roseau County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Traverse County, MN, Wadena County, MN, Wilkin County, MN, Barnes County, ND, Cass County, ND, Grand Forks County, ND, Pembina County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Steele County, ND, Traill County, ND, Walsh County, ND, Day County, SD, Grant County, SD, Marshall County, SD, Roberts County, SD

The radar

The Fargo/Grand Forks radar (KMVX), 110 km from the middle of the area, began a volume at 20:29 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

International Fa, MN (KINL), launched 12:00Z, 8.5 hours before the alert went out and 225 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.

Skew-T log-pSkew-T log-p diagram, International Fa, MN at 12:00Z on 2019-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, International Fa, MN at 12:00Z on 2019-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1444 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
85 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 17, 4:14 AM CDTMesoscale DiscussionSPCRock91 min
Jul 17, 9:09 AM CDTMesoscale DiscussionSPCJackson, Martin, Nobles, Rock96 min
Jul 17, 5:06 PM CDTTornado WatchSPCBeltrami, Itasca, Koochiching, Lake of the Woods, Saint Louis5 hr
Jul 17, 6:24 PM CDTMesoscale DiscussionSPCItasca, Koochiching, Saint Louis96 min
Jul 16, 7:37 PM CDTMesoscale DiscussionSPCAdams, Bowman, Grant, Hettinger, Sioux, Slope83 min
Jul 16, 8:28 PM CDTMesoscale DiscussionSPCDickey, Emmons, LaMoure, Logan, McIntosh, Sargent62 min
Jul 16, 10:08 PM CDTMesoscale DiscussionSPCAdams, Grant, Sioux97 min
Jul 17, 3:41 PM CDTMesoscale DiscussionSPCAdams, Billings, Bowman, Dunn, Golden Valley, Hettinger and 6 more3 hr
Jul 17, 5:38 PM CDTSevere Thunderstorm WatchSPCAdams, Bowman, Emmons, Grant, Hettinger, Sioux6 hr
Jul 16, 7:00 PM CDTMesoscale DiscussionSPCCuster, Fall River, Lawrence, Oglala Lakota, Pennington90 min
Jul 16, 11:34 PM CDTMesoscale DiscussionSPCAurora, Beadle, Brookings, Brule, Buffalo, Charles Mix and 42 more86 min
Jul 17, 4:48 AM CDTSevere Thunderstorm WatchSPCBon Homme, Charles Mix, Clay, Douglas, Hutchinson, Lincoln and 3 more5 hr
Jul 17, 4:04 PM CDTMesoscale DiscussionSPCCuster, Fall River, Lawrence2 hr

Nearby

Mesoscale Discussions in Minnesota, 2019Mesoscale Discussions in North Dakota, 2019Mesoscale Discussions in South Dakota, 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.