Alert archive / Nebraska / Mesoscale Discussions in 2011
Mesoscale Discussion 2185
The Storm Prediction Center issued this mesoscale discussion at Sep 17, 2011, 3:49 PM MDT for 6 counties in Colorado; Sherman County, Kansas; 7 counties in Nebraska. It was in force for 56 min.
The area
The outline as issued.
The facts
- Issued
- Sep 17, 2011, 3:49 PM MDT (21:49 UTC)
- Expired
- Sep 17, 2011, 4:45 PM MDT
- In force
- 56 min
- Issued by
- the Storm Prediction Center
Counties Kit Carson County, CO, Logan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Yuma County, CO, Sherman County, KS, Banner County, NE, Cheyenne County, NE, Deuel County, NE, Garden County, NE, Keith County, NE, Kimball County, NE, Morrill County, NE
The radar
The Goodland radar (KGLD), 133 km from the middle of the area, began a volume at 21:49 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 12:00Z, 9.8 hours before the alert went out and 81 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
- 2169 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 53 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
122
ACUS11 KWNS 172149
SWOMCD
SPC MCD 172149
NEZ000-KSZ000-COZ000-172245-
MESOSCALE DISCUSSION 2185
NWS STORM PREDICTION CENTER NORMAN OK
0449 PM CDT SAT SEP 17 2011
AREAS AFFECTED...NERN CO...NEB PANHANDLE...FAR NWRN KS
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 172149Z - 172245Z
A MARGINAL THREAT FOR HAIL/STRONG WINDS IS EXPECTED ACROSS PORTIONS
OF NERN CO...NEB PANHANDLE...AND INTO FAR NWRN KS. A WW IS NOT
ANTICIPATED.
LATEST WATER VAPOR IMAGERY SHOWS AN UPPER LEVEL IMPULSE TRAVERSING
EWD ACROSS N-CNTRL CO AND S-CNTRL WY. INCREASING ASCENT AHEAD OF
THIS FEATURE IS BEGINNING TO OVERSPREAD THE CNTRL HIGH
PLAINS...WHERE A PLUME OF MID-50S DEWPOINTS IS IN PLACE TO THE E OF
A STATIONARY BAROCLINIC ZONE /ANALYZED FROM 30 W ITR TO 25 SE BFF AS
OF 21Z/. ALTHOUGH SCT CLOUD COVER HAS BEEN PERSISTENT FOR MUCH OF
THE DAY /PARTICULARLY ACROSS THE NEB PANHANDLE/...TEMPERATURES HAVE
WARMED INTO THE 70S AND HAS ALLOWED THE AIR MASS TO DESTABILIZE
SUFFICIENTLY /MLCAPE VALUES RANGING FROM 500-1000 J/KG/ TO SUPPORT
INCREASING TSTM COVERAGE. MODEST MIDLEVEL FLOW/DEEP-LAYER SHEAR
COMBINED WITH A MARGINALLY UNSTABLE ENVIRONMENT WILL LIKELY ONLY
YIELD A LOW-END/ISOLATED THREAT FOR HAIL/STRONG WINDS...WHICH WILL
PROBABLY PRECLUDE THE NEED FOR A WW.
..ROGERS.. 09/17/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LBF...GLD...BOU...CYS...
LAT...LON 39760182 39230159 38890198 38880283 39160312 40190376
41320392 41980350 42130305 41880219 41420157 40260183
39760182SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 17, 1:02 PM MDT | Mesoscale Discussion | SPC | Barber, Clark, Comanche, Ford, Harper, Kingman and 3 more | 88 min |
| Sep 17, 1:30 PM MDT | Tornado Watch | SPC | Barber, Chautauqua, Clark, Comanche, Cowley, Edwards and 14 more | 9 hr |
| Sep 17, 4:49 PM MDT | Mesoscale Discussion | SPC | Barber, Harper | 116 min |
Nearby
Mesoscale Discussions in Nebraska, 2011Mesoscale Discussions in Colorado, 2011Mesoscale Discussions in Kansas, 2011Every mesoscale discussion in 2011
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.