Alert archive / North Dakota / Mesoscale Discussions in 2016

Mesoscale Discussion 1330

July 19, 20164 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 19, 2016, 3:27 PM CDT for 4 counties in North Dakota. It was in force for 33 min.

The area

The outline as issued.

The facts

Issued
Jul 19, 2016, 3:27 PM CDT (20:27 UTC)
Expired
Jul 19, 2016, 4:00 PM CDT
In force
33 min
Issued by
the Storm Prediction Center
Chance of a watch
40%

Counties Cavalier County, ND, Grand Forks County, ND, Pembina County, ND, Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 119 km from the middle of the area, began a volume at 20:30 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

Bismarck Municip, ND (KBIS), launched 12:00Z, 8.5 hours before the alert went out and 271 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 12:00Z on 2016-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2055 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 12:00Z on 2016-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 33 square meters per square second.1939587897Sfc1 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
2055 J/kg
Mixed-layer CIN
-205 J/kg
Mixed-layer LCL
978 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
33 m²/s²
0-3 km storm-relative helicity
37 m²/s²
Significant tornado parameter
0.0
Supercell composite
-1.3

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 19, 1:19 AM CDTMesoscale DiscussionSPCDivide116 min
Jul 19, 1:19 PM CDTMesoscale DiscussionSPCBenson, Cavalier, Eddy, Grand Forks, Nelson, Ramsey and 1 more116 min
Jul 19, 5:45 PM CDTSevere Thunderstorm WatchSPCBenson, Cavalier, Eddy, Grand Forks, Griggs, McHenry and 9 more5 hr

Nearby

Mesoscale Discussions in North Dakota, 2016Every mesoscale discussion in 2016

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.