Alert archive / Colorado / Mesoscale Discussions in 2003
Mesoscale Discussion 39
The Storm Prediction Center issued this mesoscale discussion at Feb 2, 2003, 5:41 PM MST for 16 counties in Colorado; Cheyenne County, Kansas; 8 counties in Nebraska. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 2, 2003, 5:41 PM MST (00:41 UTC)
- Expired
- Feb 3, 2003, 12:45 AM MST
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
All 25 counties
Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Denver County, CO, Douglas County, CO, Elbert County, CO, Jefferson County, CO, Kit Carson County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Cheyenne County, KS, Chase County, NE, Cheyenne County, NE, Deuel County, NE, Dundy County, NE, Hayes County, NE, Hitchcock County, NE, Keith County, NE, Perkins County, NE
The radar
The Denver radar (KFTG), 82 km from the middle of the area, began a volume at 00:41 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
Denver, CO (KDNR), launched 00:00Z, 0.7 hours before the alert went out and 50 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
- 569 m above ground
- 0-6 km bulk shear
- 72 kt
- 0-1 km storm-relative helicity
- -111 m²/s²
- 0-3 km storm-relative helicity
- 157 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
256 ACUS11 KWNS 030041 SWOMCD SPC MCD 030041 COZ000-NEZ000-KSZ000-030745- MESOSCALE DISCUSSION 0039 NWS STORM PREDICTION CENTER NORMAN OK 0641 PM CST SUN FEB 02 2003 AREAS AFFECTED...E CNTRL THROUGH NERN CO...SWRN NEB AND EXTREME NWRN KS CONCERNING...HEAVY SNOW VALID 030041Z - 030745Z SNOWFALL RATES LOCALLY UP TO 1 INCH PER HOUR ARE EXPECTED FROM E CNTRL THROUGH NERN CO...SPREADING INTO SWRN NEB LATER THIS EVENING AND NWRN KS AFTER 06Z. SURFACE ANALYSIS SHOWS A COLD FRONT EXTENDING FROM A SURFACE LOW IN SERN NEB...SWWD THROUGH KS TO ANOTHER LOW IN SERN CO. NLY LOW LEVEL FLOW HAS BECOME WELL ESTABLISHED IN POST FRONTAL REGION. WELL DEFINED VORT MAX OVER WRN CO WILL CONTINUE EWD THIS EVENING AND IN THE PROCESS ENHANCE LIFT ALONG MID LEVEL BAROCLINIC ZONE ACROSS NERN CO. VERTICAL MOTION WILL BE FURTHER ENHANCED IN UPSLOPE ZONE ALONG THE PALMER DIVIDE ACROSS ERN CO. THE 00Z SOUNDINGS FROM DENVER AND GRAND JUNCTION SHOW STEEP MID LEVEL LAPSES ASSOCIATED WITH COLD AIR ALOFT ACCOMPANYING THE VORT MAX. MARGINAL ELEVATED INSTABILITY WILL LIKELY PERSIST ABOVE THE STABLE SURFACE LAYER AS THIS ZONE OF ASCENT AND STEEP LAPSE RATES SPREAD EWD THROUGH CO. THIS SUGGESTS THE SNOWFALL RATES WILL ALSO LIKELY BE CONVECTIVELY ENHANCED. ..DIAL.. 02/03/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... 40220524 41310334 41460144 40540060 39270187 38840458 39260562 40160540
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 3, 2:34 AM MST | Mesoscale Discussion | SPC | Ellis, Graham, Jewell, Mitchell, Norton, Osborne and 6 more | 5 hr |
| Feb 3, 8:38 AM MST | Mesoscale Discussion | SPC | Atchison, Brown, Clay, Cloud, Doniphan, Jackson and 8 more | 5 hr |
Nearby
Mesoscale Discussions in Colorado, 2003Mesoscale Discussions in Nebraska, 2003Mesoscale Discussions in Kansas, 2003Every mesoscale discussion in 2003
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.