Alert archive / Kansas / Mesoscale Discussions in 2011
Mesoscale Discussion 70
The Storm Prediction Center issued this mesoscale discussion at Feb 1, 2011, 1:11 PM CST for 4 states. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 1, 2011, 1:11 PM CST (19:11 UTC)
- Expired
- Feb 1, 2011, 5:15 PM CST
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 40 counties
Benton County, AR, Allen County, KS, Anderson County, KS, Bourbon County, KS, Chase County, KS, Chautauqua County, KS, Cherokee County, KS, Coffey County, KS, Crawford County, KS, Douglas County, KS, Elk County, KS, Franklin County, KS, Greenwood County, KS, Jefferson County, KS, Johnson County, KS, Labette County, KS, Linn County, KS, Lyon County, KS, Miami County, KS, Montgomery County, KS, Neosho County, KS, Osage County, KS, Shawnee County, KS, Wilson County, KS, Woodson County, KS, Barry County, MO, Barton County, MO, Dade County, MO, Jasper County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Craig County, OK, Delaware County, OK, Mayes County, OK, Nowata County, OK, Osage County, OK, Ottawa County, OK, Rogers County, OK, Washington County, OK
The radar
The Springfield radar (KSGF), 147 km from the middle of the area, began a volume at 19:12 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
Springfield, MO (KSGF), launched 12:00Z, 7.2 hours before the alert went out and 132 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
- 535 m above ground
- 0-6 km bulk shear
- 74 kt
- 0-1 km storm-relative helicity
- 231 m²/s²
- 0-3 km storm-relative helicity
- 308 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
035
ACUS11 KWNS 011912
SWOMCD
SPC MCD 011911
MOZ000-ARZ000-OKZ000-KSZ000-012315-
MESOSCALE DISCUSSION 0070
NWS STORM PREDICTION CENTER NORMAN OK
0111 PM CST TUE FEB 01 2011
AREAS AFFECTED...SERN/E-CNTRL KS...NERN OK...SWRN MO
CONCERNING...BLIZZARD
VALID 011911Z - 012315Z
BLIZZARD CONDITIONS WILL CONTINUE THROUGH THE AFTERNOON ACROSS
SERN/ERN KS...SWRN MO...AND NERN OK...WITH MDT TO HEAVY SNOW /RATES
OF 1 TO 2 INCHES PER HOUR/ AND WIND GUSTS OVER 40 MPH EXPECTED.
BANDS OF MODERATE TO HEAVY SNOW WILL CONTINUE SHIFTING N/NEWD WITHIN
THE DEFORMATION ZONE OF AN INTENSE EXTRATROPICAL CYCLONE OVER THE
CNTRL CONUS. THIS ACTIVITY IS BEING SUPPORTED BY ASCENT ASSOCIATED
WITH THE WRN BRANCH OF THE WARM CONVEYOR BELT WRAPPING CYCLONICALLY
THROUGH THE NWRN SEMICIRCLE OF THE CYCLONE. AS THE 700-MB LOW IS
PULLED NEWD...THE HEAVY SNOW IS EXPECTED TO MOVE INTO PORTIONS OF
E-CNTRL KS BY 20Z AND TAPER OFF ACROSS NERN OK AND SWRN MO BY 00Z.
MESOSCALE BANDING...WITH SNOWFALL RATES OF 1 TO 2 INCHES PER HOUR
WILL BE SUPPORTED BY
1. THE ASCENDING BRANCH OF THE FRONTOGENETIC CIRCULATION
ACCOMPANYING THE LOW/MID-LEVEL BAROCLINIC ZONE AND
2. A ZONE OF SLANTWISE INSTABILITY TRACKING EWD E-NEWD ACROSS THE
REGION PER 12Z RUN OF THE NAM MODEL.
WHILE THE NARROW DRY-SLOT EXTENDING NWD THROUGH WRN AR AND SWRN MO
COULD CAUSE SNOWFALL RATES TO TEMPORARILY DECREASE THROUGH
1930Z...RATES SHOULD INCREASE THEREAFTER AS ADDITIONAL WRAP-AROUND
PRECIPITATION UPSTREAM MOVES INTO THE REGION. THE TIGHT SFC PRESSURE
GRADIENT WILL CONTINUE TO SUPPORT STRONG NWLY SFC WINDS GUSTING IN
EXCESS OF 40 MPH...AS EVIDENCED BY RECENT OK MESONET OBSERVATIONS.
THIS WILL RESULT IN BLIZZARD CONDITIONS ACROSS THE DISCUSSION AREA
THROUGH THE AFTERNOON.
..COHEN/ROGERS.. 02/01/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...SGF...EAX...TSA...TOP...ICT...
LAT...LON 39069467 37989466 37709422 37479370 37089343 36649350
36009426 35999539 36259629 37169672 38199667 38829627
39289537 39069467SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 31, 10:36 PM CST | Mesoscale Discussion | SPC | Benton, Washington | 5 hr |
| Feb 1, 6:46 AM CST | Mesoscale Discussion | SPC | Ashley, Bradley, Calhoun, Chicot, Clark, Cleveland and 13 more | 119 min |
| Feb 1, 6:54 AM CST | Mesoscale Discussion | SPC | Boone, Carroll, Madison, Marion, Washington | 5 hr |
| Jan 31, 7:55 PM CST | Mesoscale Discussion | SPC | Morton, Stevens | 5 hr |
| Feb 1, 3:11 AM CST | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Chautauqua, Cherokee, Cowley and 9 more | 6 hr |
| Feb 1, 10:36 AM CST | Mesoscale Discussion | SPC | Adair, Audrain, Bates, Benton, Boone, Caldwell and 56 more | 6 hr |
| Feb 1, 11:42 AM CST | Mesoscale Discussion | SPC | Crawford, Dent, Franklin, Gasconade, Howell, Iron and 14 more | 5 hr |
| Feb 1, 3:36 PM CST | Mesoscale Discussion | SPC | Adair, Audrain, Boone, Callaway, Carroll, Chariton and 25 more | 6 hr |
| Jan 31, 9:04 PM CST | Mesoscale Discussion | SPC | Carter, Cleveland, Comanche, Cotton, Creek, Garvin and 14 more | 6 hr |
| Jan 31, 11:29 PM CST | Mesoscale Discussion | SPC | Bryan, Marshall | 5 hr |
Nearby
Mesoscale Discussions in Kansas, 2011Mesoscale Discussions in Oklahoma, 2011Mesoscale Discussions in Missouri, 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.