Alert archive / North Dakota / Mesoscale Discussions in 2004
Mesoscale Discussion 975
The Storm Prediction Center issued this mesoscale discussion at May 29, 2004, 3:12 PM CDT for 18 counties in North Dakota. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 29, 2004, 3:12 PM CDT (20:12 UTC)
- Expired
- May 29, 2004, 5:15 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
Counties Barnes County, ND, Benson County, ND, Cass County, ND, Cavalier County, ND, Eddy County, ND, Foster County, ND, Grand Forks County, ND, Griggs County, ND, LaMoure County, ND, Nelson County, ND, Pembina County, ND, Ramsey County, ND, Ransom County, ND, Steele County, ND, Stutsman County, ND, Towner County, ND, Traill County, ND, Walsh County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 105 km from the middle of the area, began a volume at 20:15 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, 8.2 hours before the alert went out and 169 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 739 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 256 m²/s²
- 0-3 km storm-relative helicity
- 266 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
207 ACUS11 KWNS 292013 SWOMCD SPC MCD 292012 MNZ000-NDZ000-292215- MESOSCALE DISCUSSION 0975 NWS STORM PREDICTION CENTER NORMAN OK 0312 PM CDT SAT MAY 29 2004 AREAS AFFECTED...ERN ND CONCERNING...SEVERE THUNDERSTORM POTENTIAL VALID 292012Z - 292215Z NEW WW WILL LIKELY BE NEEDED WITHIN NEXT HOUR OR TWO. SHORT WAVE TROUGH...EMBEDDED WITHIN BROADER CYCLONIC MID/UPPER FLOW EAST OF MAIN UPPER TROUGH AXIS...CONTINUES TO LIFT NORTH NORTHEASTWARD INTO THE EASTERN DAKOTAS. ASSOCIATED WITH THIS SYSTEM ...MID-LEVEL CYCLONIC VORTICITY CENTER IS READILY APPARENT IN RADAR REFLECTIVITY LOOPS TO THE WEST OF JAMESTOWN ND. STRONGER FORCING WITH THIS FEATURE IS SUPPORTING PERSISTENT CLUSTER OF STORMS...WHICH MAY INTENSIFY NEXT COUPLE OF HOURS AS IT LIFTS INTO THE DEVILS LAKE AREA. ADDITIONAL ACTIVITY WILL CONTINUE TO DEVELOP SOUTHWARD AHEAD OF SHEAR AXIS ALONG/WEST OF INTERSTATE 29. WHILE CLOUD COVER HAS IMPEDED SURFACE HEATING/DESTABILIZATION ACROSS MUCH OF EASTERN NORTH DAKOTA...NARROW TONGUE OF MOISTURE ADVECTING NORTHWARD ALONG/WEST OF SOUTHERLY LOW-LEVEL JET AXIS ACROSS THIS REGION IS POTENTIALLY BUOYANT WITH CAPE UP TO 1000 J/KG. GIVEN SHEAR PROFILES FAVORABLE FOR UPDRAFT ROTATION...A FEW SEVERE STORMS WITH LARGE HAIL WILL BE POSSIBLE INTO THE EVENING HOURS. ..KERR.. 05/29/2004 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...FGF...BIS... 46649958 47239956 47969967 48729941 48919848 48789701 46409699 45979821
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 9:03 PM CDT | Mesoscale Discussion | SPC | Dickey, Ransom, Richland, Sargent | 57 min |
| May 29, 3:25 PM CDT | Severe Thunderstorm Watch | SPC | Barnes, Benson, Cass, Cavalier, Dickey, Eddy and 18 more | 6 hr |
Nearby
Mesoscale Discussions in North Dakota, 2004Every mesoscale discussion in 2004
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.