Alert archive / Nebraska / Mesoscale Discussions in 2016
Mesoscale Discussion 1815
The Storm Prediction Center issued this mesoscale discussion at Nov 17, 2016, 5:02 PM MST for Phillips County, Sedgwick County, Yuma County, Colorado; Cheyenne County, Kansas; 9 counties in Nebraska. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Nov 17, 2016, 5:02 PM MST (00:02 UTC)
- Expired
- Nov 17, 2016, 9:00 PM MST
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
Counties Phillips County, CO, Sedgwick County, CO, Yuma County, CO, Cheyenne County, KS, Arthur County, NE, Chase County, NE, Deuel County, NE, Dundy County, NE, Hayes County, NE, Hitchcock County, NE, Keith County, NE, Lincoln County, NE, Perkins County, NE
The radar
The Goodland radar (KGLD), 124 km from the middle of the area, began a volume at 00:06 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 (KDEN), launched 00:00Z, 0.0 hours before the alert went out and 117 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
- 589 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
908
ACUS11 KWNS 180002
SWOMCD
SPC MCD 180002
NEZ000-KSZ000-COZ000-180400-
MESOSCALE DISCUSSION 1815
NWS STORM PREDICTION CENTER NORMAN OK
0602 PM CST THU NOV 17 2016
AREAS AFFECTED...FAR NORTHEASTERN CO...EXTREME NORTHWESTERN
KS...SOUTHWEST NEB
CONCERNING...HEAVY SNOW
VALID 180002Z - 180400Z
SUMMARY...SNOWFALL RATES AROUND 1 INCH PER HOUR ARE POSSIBLE ACROSS
THE REGION FOR THE NEXT SEVERAL HOURS.
DISCUSSION...SURFACE OBSERVATION AT HEQ /IN FAR NORTHEAST CO/
RECENTLY STARTED REPORTING HEAVY SNOW AND SYF /IN FAR NORTHWEST KS/
RECENTLY REPORTED MODERATE SNOW...WITH BOTH STATIONS EXPERIENCING A 3
DEGREE DROP IN THE SURFACE TEMPERATURE OVER THE PAST HOUR. THESE
OBSERVATIONS CONFIRM THE WET-BULBING SUGGESTED BY RECENT RAP
SOUNDINGS. FRONTOGENETIC FORCING IS EXPECTED TO PERSIST ACROSS THIS
REGION FOR THE NEXT FEW HOURS AS THE SHORTWAVE TROUGH PIVOTS
NORTHEASTWARD INTO THE PLAINS AND THE RESULTING LIFT AND COLUMN
COOLING ARE EXPECTED TO SUPPORT A CONTINUED TRANSITION FROM RAIN TO
MODERATE/HEAVY SNOW. GIVEN THE STRENGTH AND LOCATION OF THE
STRONGEST FORCING FOR ASCENT...SNOWFALL RATES AROUND 1 INCH PER HOUR
ARE POSSIBLE FOR THE NEXT FEW HOURS.
..MOSIER/NONE.. 11/18/2016
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LBF...GLD...BOU...CYS...
LAT...LON 40300346 41770193 41370012 40370078 39250201 39730274
40300346SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 18, 1:42 AM MST | Mesoscale Discussion | SPC | Boyd, Holt, Knox, Rock | 4 hr |
Nearby
Mesoscale Discussions in Nebraska, 2016Mesoscale Discussions in Colorado, 2016Mesoscale Discussions in Kansas, 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.