Alert archive / Colorado / Mesoscale Discussions in 2011
Mesoscale Discussion 1997
The Storm Prediction Center issued this mesoscale discussion at Aug 17, 2011, 6:19 PM MDT for 6 counties in Colorado; Morton County, Stanton County, Kansas; Cimarron County, Oklahoma. It was in force for 56 min.
The area
The outline as issued.
The facts
- Issued
- Aug 17, 2011, 6:19 PM MDT (00:19 UTC)
- Expired
- Aug 17, 2011, 7:15 PM MDT
- In force
- 56 min
- Issued by
- the Storm Prediction Center
Counties Baca County, CO, Bent County, CO, Crowley County, CO, Kiowa County, CO, Otero County, CO, Prowers County, CO, Morton County, KS, Stanton County, KS, Cimarron County, OK
The radar
The Pueblo radar (KPUX), 142 km from the middle of the area, began a volume at 00:18 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
Denver, CO (KDNR), launched 00:00Z, 0.3 hours before the alert went out and 247 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
- 6 J/kg
- Mixed-layer CIN
- -104 J/kg
- Mixed-layer LCL
- 4056 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
149
ACUS11 KWNS 180019
SWOMCD
SPC MCD 180019
OKZ000-KSZ000-COZ000-NMZ000-180115-
MESOSCALE DISCUSSION 1997
NWS STORM PREDICTION CENTER NORMAN OK
0719 PM CDT WED AUG 17 2011
AREAS AFFECTED...SERN CO / FAR SWRN KS / OK PANHANDLE
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 180019Z - 180115Z
SEVERE WIND GUST THREAT MAY PERSIST WELL INTO THE EVENING HOURS
ACROSS SERN CO AND PERHAPS AS FAR SE AS THE OK PANHANDLE AND EXTREME
SWRN KS. IF SHORT TERM TRENDS CONTINUE TO INCREASE REGARDING
UPSCALE GROWTH...A SMALL WW MAY ADDRESS THIS THREAT. POSSIBILITY OF
A WW 50 PERCENT.
SELY UPSLOPE FLOW ON THE N SIDE OF A STALLED FRONT ACROSS THE SRN
PLAINS IS PROVIDING A MOIST/UNSTABLE FETCH OF HIGHER THETA-E INTO
THE REGION. STRONGLY VEERING SHEAR PROFILES /4 KM AGL WINDS 25 KTS
PER KPUX/ WILL SUPPORT STORM ORGANIZATION. UNCERTAINTY REMAINS
REGARDING THE DEGREE OF UPSCALE GROWTH THAT THE CURRENT LINEAR STORM
CLUSTER MAY ENACT OVER THE NEXT HOUR. IF THIS OCCURS...STEEP LOW
LEVEL LAPSE RATES...DESPITE SOME DIURNAL COOLING...MAY CONTINUE TO
PROMOTE SEVERE WIND GUSTS TO THE SURFACE.
..SMITH.. 08/18/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...DDC...GLD...AMA...PUB...BOU...ABQ...
LAT...LON 36710254 37060324 38150446 38470453 38750327 38460226
37780168 36870175 36710254SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 6:37 PM MDT | Severe Thunderstorm Watch | SPC | Baca, Bent, Kiowa, Las Animas, Otero, Prowers | 3 hr |
| Aug 17, 9:17 PM MDT | Mesoscale Discussion | SPC | Baca, Prowers | 58 min |
| Aug 17, 8:18 PM MDT | Mesoscale Discussion | SPC | Cheyenne | 57 min |
| Aug 18, 4:26 PM MDT | Mesoscale Discussion | SPC | Barton, Edwards, Ellis, Ellsworth, Lincoln, Ness and 6 more | 64 min |
| Aug 18, 5:00 PM MDT | Mesoscale Discussion | SPC | Atchison, Brown, Doniphan, Douglas, Jackson, Jefferson and 5 more | 60 min |
Nearby
Mesoscale Discussions in Colorado, 2011Mesoscale Discussions in Kansas, 2011Mesoscale Discussions in Oklahoma, 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.