Alert archive / Kansas / Mesoscale Discussions in 2007
Mesoscale Discussion 539
The Storm Prediction Center issued this mesoscale discussion at Apr 22, 2007, 3:07 PM CDT for 19 counties in Kansas; 10 counties in Missouri. It was in force for 113 min.
The area
The outline as issued.
The facts
- Issued
- Apr 22, 2007, 3:07 PM CDT (20:07 UTC)
- Expired
- Apr 22, 2007, 5:00 PM CDT
- In force
- 113 min
- Issued by
- the Storm Prediction Center
All 29 counties
Allen County, KS, Anderson County, KS, Bourbon County, KS, Cherokee County, KS, Coffey County, KS, Crawford County, KS, Douglas County, KS, Franklin County, KS, Johnson County, KS, Labette County, KS, Leavenworth County, KS, Linn County, KS, Miami County, KS, Montgomery County, KS, Neosho County, KS, Osage County, KS, Wilson County, KS, Woodson County, KS, Wyandotte County, KS, Barton County, MO, Bates County, MO, Cass County, MO, Clay County, MO, Jackson County, MO, Johnson County, MO, Lafayette County, MO, Platte County, MO, Ray County, MO, Vernon County, MO
The radar
The Pleasant Hill radar (KEAX), 90 km from the middle of the area, began a volume at 20:08 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
Topeka, KS (KTOP), launched 12:00Z, 8.1 hours before the alert went out and 115 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
- 1369 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 331 m²/s²
- 0-3 km storm-relative helicity
- 341 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 222007 SWOMCD SPC MCD 222007 MOZ000-KSZ000-222200- MESOSCALE DISCUSSION 0539 NWS STORM PREDICTION CENTER NORMAN OK 0307 PM CDT SUN APR 22 2007 AREAS AFFECTED...ERN KS AND WRN MO CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY VALID 222007Z - 222200Z AN ISOLATED SVR STORM MAY DEVELOP OVER THE AREA IN THE NEXT FEW HOURS...BUT GIVEN THE MARGINAL/LIMITED NATURE OF THE SVR THREAT...A WW IS NOT EXPECTED ATTM. LATEST VISIBLE IMAGERY INDICATES MODERATE CU DEVELOPING ALONG A DRYLINE EXTENDING FROM NEAR TOP SWD TO 30 W OF CNU. RECENT RUC/NAM FORECAST SOUNDINGS INDICATE THAT MID LEVEL INVERSION SHOULD REMAIN STOUT ACROSS THE AREA /SOUTH OF THE NEWD EJECTING UPPER LOW OVER ERN NEB/ AS EVIDENT BY THE STRONG DRYING NOTED ON WV IMAGERY. THUS DESPITE INCREASING LOW LEVEL INSTABILITY...WITH MLCAPES AROUND 750-1000 J/KG...WEAK 700-500 MB LAPSE RATES SHOULD TEND TO LIMIT THE UPDRAFT STRENGTH AND MAGNITUDE OF THE SVR TSTM THREAT ENOUGH THAT A WW IS NOT ANTICIPATED. ..CROSBIE.. 04/22/2007 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...SGF...EAX...TOP...ICT... 37119445 37619411 38679371 39359379 39409406 39399477 39049536 38689587 38089594 37419592 37119586 37089506
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 21, 10:45 PM CDT | Mesoscale Discussion | SPC | Barber, Comanche | 60 min |
| Apr 22, 10:57 AM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Clay, Cloud, Dickinson, Doniphan and 20 more | 93 min |
| Apr 22, 11:30 AM CDT | Tornado Watch | SPC | Atchison, Brown, Clay, Cloud, Doniphan, Geary and 10 more | 6 hr |
| Apr 22, 1:17 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Clark, Knox, Lewis, Macon, Marion and 4 more | 8 hr |
| Apr 22, 1:25 PM CDT | Mesoscale Discussion | SPC | Andrew, Atchison, Buchanan, Caldwell, Clay, Clinton and 12 more | 95 min |
| Apr 22, 1:56 PM CDT | Tornado Watch | SPC | Andrew, Buchanan, Caldwell, Clinton, Daviess, DeKalb and 7 more | 7 hr |
| Apr 22, 5:59 PM CDT | Mesoscale Discussion | SPC | Caldwell, Clinton, Daviess, DeKalb, Gentry, Grundy and 4 more | 2 hr |
Nearby
Mesoscale Discussions in Kansas, 2007Mesoscale Discussions in Missouri, 2007Every mesoscale discussion in 2007
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.