Alert archive / North Dakota / Mesoscale Discussions in 2015

Mesoscale Discussion 1545

July 26, 20157 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 26, 2015, 1:43 PM MDT for 7 counties in North Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 26, 2015, 1:43 PM MDT (19:43 UTC)
Expired
Jul 26, 2015, 3:45 PM MDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
40%

Counties Dunn County, ND, McHenry County, ND, McLean County, ND, Mercer County, ND, Mountrail County, ND, Stark County, ND, Ward County, ND

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, 7.7 hours before the alert went out and 153 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 2015-07-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 26 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 2015-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 square meters per square second.193958Sfc1 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
26 J/kg
Mixed-layer CIN
-422 J/kg
Mixed-layer LCL
2000 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
29 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 26, 2:42 PM MDTSevere Thunderstorm WatchSPCBillings, Bottineau, Burke, Dunn, Grant, Hettinger and 13 more6 hr
Jul 26, 5:23 PM MDTMesoscale DiscussionSPCAdams, Bottineau, Bowman, Burleigh, Dunn, Grant and 14 more97 min

Nearby

Mesoscale Discussions in North Dakota, 2015Every mesoscale discussion in 2015

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.