Alert archive / Colorado / Mesoscale Discussions in 2012
Mesoscale Discussion 600
The Storm Prediction Center issued this mesoscale discussion at Apr 27, 2012, 1:24 AM MDT for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 27, 2012, 1:24 AM MDT (07:24 UTC)
- Expired
- Apr 27, 2012, 3:30 AM MDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 30 counties
Baca County, CO, Bent County, CO, Cheyenne County, CO, Crowley County, CO, Kiowa County, CO, Kit Carson County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Prowers County, CO, Washington County, CO, Yuma County, CO, Cheyenne County, KS, Grant County, KS, Greeley County, KS, Hamilton County, KS, Kearny County, KS, Morton County, KS, Sherman County, KS, Stanton County, KS, Stevens County, KS, Wallace County, KS, Wichita County, KS, Cimarron County, OK, Texas County, OK, Dallam County, TX, Hansford County, TX, Moore County, TX, Sherman County, TX
The radar
The Pueblo radar (KPUX), 147 km from the middle of the area, began a volume at 07:27 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, 7.4 hours before the alert went out and 196 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
- 95 J/kg
- Mixed-layer CIN
- -85 J/kg
- Mixed-layer LCL
- 2538 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 175 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
804
ACUS11 KWNS 270724
SWOMCD
SPC MCD 270724
KSZ000-TXZ000-OKZ000-NEZ000-COZ000-NMZ000-270930-
MESOSCALE DISCUSSION 0600
NWS STORM PREDICTION CENTER NORMAN OK
0224 AM CDT FRI APR 27 2012
AREAS AFFECTED...ERN CO/WRN KS/PARTS OF THE TX AND OK PANHANDLES
CONCERNING...SEVERE THUNDERSTORM WATCH 193...
VALID 270724Z - 270930Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 193
CONTINUES.
LATEST RADAR LOOP SHOWS THE STRONGEST ONGOING CONVECTION ACROSS SERN
CO ATTM...WITHIN A NARROW INSTABILITY AXIS INDICATED BY OBJECTIVE
ANALYSES. WITHIN THIS AXIS...SELY LOW-LEVEL FLOW CONTINUES TO
ADVECT LOW-LEVEL MOISTURE NWWD INTO THE HIGH PLAINS...BENEATH
STEEPENING MID-LEVEL LAPSE RATES ASSOCIATED WITH THE
EJECTING/NEGATIVELY-TILTED SHORT-WAVE TROUGH.
WHILE THE AXIS OF GREATEST INSTABILITY REMAINS MODEST AND
NARROW...CONTINUED MOISTENING DOWN LOW AND COOLING ALOFT COMBINED
WITH IMPRESSIVE FLOW FIELD WITH HEIGHT SUGGESTS POTENTIAL FOR
SEVERE/SUPERCELL STORMS WILL CONTINUE -- PARTICULARLY ACROSS SERN CO
AND A SMALL PORTION OF ADJACENT SWRN KS. ALONG WITH POTENTIAL FOR
DAMAGING WINDS AND HAIL...AN ISOLATED TORNADO ALSO CANNOT BE RULED
OUT ACROSS A SMALL PORTION OF SERN CO...GIVEN THE FAVORABLY STRONG
LOW-LEVEL SHEAR JUXTAPOSED WITH THE MORE MOIST/UNSTABLE AIRMASS
EXISTING IN THIS PORTION OF THE REGION.
STORMS REMAIN WELL-CONTAINED WITHIN THE WW GIVEN THE NNEWD CELL
MOTIONS. THIS COMBINED WITH A MUCH LESS FAVORABLE THERMODYNAMIC
ENVIRONMENT DOWNSTREAM ACROSS NWRN KS SUGGESTS THAT ANY AREAL WATCH
EXTENSION OR NEW WW ISSUANCE APPEARS UNNECESSARY ATTM.
..GOSS.. 04/27/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LBF...DDC...GLD...AMA...PUB...BOU...ABQ...
LAT...LON 35650219 36590319 37730346 38680401 40670411 40870329
40800207 39590136 37630097 36260102 35650219SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 8:41 PM MDT | Mesoscale Discussion | SPC | Adams, Arapahoe, Baca, Bent, Broomfield, Cheyenne and 21 more | 2 hr |
| Apr 26, 9:00 PM MDT | Severe Thunderstorm Watch | SPC | Baca, Bent, Cheyenne, Crowley, Elbert, Kiowa and 11 more | 7 hr |
| Apr 27, 3:43 AM MDT | Mesoscale Discussion | SPC | Cheyenne, Kit Carson, Yuma | 32 min |
| Apr 27, 5:16 AM MDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Butler, Chase, Coffey and 22 more | 59 min |
| Apr 27, 9:15 AM MDT | Mesoscale Discussion | SPC | Barber, Barton, Butler, Cowley, Dickinson, Ellis and 21 more | 2 hr |
| Apr 27, 12:29 PM MDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Butler, Chase, Chautauqua and 34 more | 91 min |
| Apr 27, 1:11 PM MDT | Tornado Watch | SPC | Allen, Anderson, Bourbon, Butler, Chase, Chautauqua and 46 more | 7 hr |
| Apr 27, 2:44 PM MDT | Mesoscale Discussion | SPC | Allen, Anderson, Butler, Chase, Chautauqua, Clay and 22 more | 61 min |
| Apr 27, 5:07 PM MDT | Mesoscale Discussion | SPC | Allen, Anderson, Atchison, Bourbon, Brown, Cherokee and 32 more | 113 min |
Nearby
Mesoscale Discussions in Colorado, 2012Mesoscale Discussions in Kansas, 2012Mesoscale Discussions in Texas, 2012Every mesoscale discussion in 2012
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.