Alert archive / North Dakota / Mesoscale Discussions in 2005

Mesoscale Discussion 949

May 21, 20059 counties in Minnesota; 13 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at May 21, 2005, 7:43 AM CDT for 9 counties in Minnesota; 13 counties in North Dakota. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued
May 21, 2005, 7:43 AM CDT (12:43 UTC)
Expired
May 21, 2005, 8:45 AM CDT
In force
62 min
Issued by
the Storm Prediction Center
All 22 counties

Becker County, MN, Clay County, MN, Mahnomen County, MN, Marshall County, MN, Norman County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Roseau County, MN, Barnes County, ND, Cass County, ND, Eddy County, ND, Foster County, ND, Grand Forks County, ND, Griggs County, ND, LaMoure County, ND, Nelson County, ND, Ramsey County, ND, Ransom County, ND, Steele County, ND, Traill County, ND, Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 23 km from the middle of the area, began a volume at 12:45 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 12:00Z, 0.7 hours before the alert went out and 337 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 2005-05-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2005-05-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 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
1002 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
39 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
May 20, 11:37 PM CDTMesoscale DiscussionSPCClay, Mahnomen, Norman, Pennington, Polk, Red Lake and 1 more83 min
May 21, 1:08 AM CDTMesoscale DiscussionSPCBig Stone, Clay, Grant, Lac qui Parle, Stevens, Traverse and 1 more97 min
May 21, 1:35 AM CDTSevere Thunderstorm WatchSPCBecker, Clay, Mahnomen, Marshall, Norman, Pennington and 3 more7 hr
May 21, 4:52 AM CDTMesoscale DiscussionSPCBecker, Clay, Mahnomen, Marshall, Norman, Pennington and 3 more83 min
May 21, 1:24 PM CDTMesoscale DiscussionSPCBecker, Clay, Clearwater, Kittson, Mahnomen, Marshall and 7 more66 min
May 21, 3:15 PM CDTSevere Thunderstorm WatchSPCBecker, Beltrami, Cass, Clay, Clearwater, Crow Wing and 13 more6 hr
May 20, 9:30 PM CDTSevere Thunderstorm WatchSPCMcKenzie, Williams5 hr
May 20, 10:45 PM CDTMesoscale DiscussionSPCMcKenzie, Williams2 hr
May 21, 3:50 PM CDTMesoscale DiscussionSPCBottineau, Cavalier, McHenry, Pierce, Ramsey, Renville and 2 more115 min

Nearby

Mesoscale Discussions in North Dakota, 2005Mesoscale Discussions in Minnesota, 2005Every mesoscale discussion in 2005

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.