Alert archive / North Dakota / Mesoscale Discussions in 2021

Mesoscale Discussion 892

June 8, 202110 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 8, 2021, 7:35 PM MDT for 10 counties in North Dakota. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued
Jun 8, 2021, 7:35 PM MDT (01:35 UTC)
Expired
Jun 8, 2021, 9:00 PM MDT
In force
85 min
Issued by
the Storm Prediction Center
Concerning
Severe thunderstorm watch 248

Counties Billings County, ND, Bowman County, ND, Burke County, ND, Divide County, ND, Dunn County, ND, Golden Valley County, ND, McKenzie County, ND, Slope County, ND, Stark County, ND, Williams County, ND

The radar

The Bismarck radar (KBIS), 203 km from the middle of the area, began a volume at 01:38 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

Bismarck Municip, ND (KBIS), launched 00:00Z, 1.6 hours before the alert went out and 207 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, Bismarck Municip, ND at 00:00Z on 2021-06-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 113 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, Bismarck Municip, ND at 00:00Z on 2021-06-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 94 square meters per square second.1939Sfc1 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
113 J/kg
Mixed-layer CIN
-181 J/kg
Mixed-layer LCL
2317 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
94 m²/s²
0-3 km storm-relative helicity
176 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

187 
ACUS11 KWNS 090136
SWOMCD
SPC MCD 090135 
NDZ000-SDZ000-090300-

Mesoscale Discussion 0892
NWS Storm Prediction Center Norman OK
0835 PM CDT Tue Jun 08 2021

Areas affected...Western North Dakota

Concerning...Severe Thunderstorm Watch 248...

Valid 090135Z - 090300Z

The severe weather threat for Severe Thunderstorm Watch 248
continues.

SUMMARY...Gusty winds and hail remain likely with the strongest
storms.

DISCUSSION...Long-lived MCS cluster that has propagated west across
ND has forced an outflow boundary across ww248 into eastern MT.
Substantial cold pool from this MCS has contributed to quite gusty
southeast winds, at times speeds in excess of 50kt, well west of the
original precip shield. This may continue for a few more hours
before convection spreads from west to east across the watch. Hail
may accompany this eastward-moving activity before it weakens as it
encounters cooler, less buoyant air mass downstream.

..Darrow.. 06/09/2021

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...BIS...UNR...

LAT...LON   45920403 48970388 48980235 45930258 45920403

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 8, 10:41 PM MDTMesoscale DiscussionSPCAdams, Grant94 min

Nearby

Mesoscale Discussions in North Dakota, 2021Every mesoscale discussion in 2021

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.