Alert archive / Kansas / Mesoscale Discussions in 2009
Mesoscale Discussion 1421
The Storm Prediction Center issued this mesoscale discussion at Jul 3, 2009, 8:18 PM CDT for 14 counties in Kansas. It was in force for 57 min.
The area
The outline as issued.
The facts
- Issued
- Jul 3, 2009, 8:18 PM CDT (01:18 UTC)
- Expired
- Jul 3, 2009, 9:15 PM CDT
- In force
- 57 min
- Issued by
- the Storm Prediction Center
Counties Brown County, KS, Clay County, KS, Cloud County, KS, Dickinson County, KS, Geary County, KS, Jackson County, KS, Marshall County, KS, Morris County, KS, Nemaha County, KS, Ottawa County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Washington County, KS
The radar
The Topeka radar (KTWX), 32 km from the middle of the area, began a volume at 01:21 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 00:00Z, 1.3 hours before the alert went out and 84 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
- 969 J/kg
- Mixed-layer CIN
- -177 J/kg
- Mixed-layer LCL
- 933 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 252 m²/s²
- 0-3 km storm-relative helicity
- 458 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 3.8
The text
As transmitted, in the capitals the NWS used until 2016.
000
ACUS11 KWNS 040118
SWOMCD
SPC MCD 040118
KSZ000-040215-
MESOSCALE DISCUSSION 1421
NWS STORM PREDICTION CENTER NORMAN OK
0818 PM CDT FRI JUL 03 2009
AREAS AFFECTED...NERN KS
CONCERNING...TORNADO WATCH 543...
VALID 040118Z - 040215Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 543 CONTINUES.
EARLY EVENING SURFACE ANALYSIS INDICATED A BOUNDARY EXTENDING ESEWD
FROM THE STORM IN OTTAWA COUNTY KS TO WEST CENTRAL MO...WHILE
ANOTHER BOUNDARY/OUTFLOW BOUNDARY EXTENDS EWD FROM FAR SRN NEB INTO
FAR NRN MO. A VERY MOIST AND UNSTABLE AIR MASS ALONG AND S OF THE
FORMER BOUNDARY IN NERN KS COMBINED WITH EFFECTIVE BULK SHEAR AROUND
50 KT WILL MAINTAIN POTENTIAL FOR STRONG TO SEVERE STORMS THIS
EVENING. ALTHOUGH OBJECTIVE ANALYSES SUGGEST SURFACE BASED
INHIBITION IS INCREASING ACROSS THIS REGION...BUT PROXIMITY OF
OTTAWA STORM TO THE SURFACE BOUNDARY AND 30 KT SLY LLJ INTO THIS
REGION SUGGESTS STORM MAY STILL BE SURFACE BASED WITH AN ATTENDANT
THREAT FOR ISOLATED TORNADOES.
..PETERS.. 07/04/2009
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...EAX...TOP...ICT...GID...
LAT...LON 38549641 38669734 38939790 39989793 39979533 39189562
39009619 38519632 38549641SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 3, 9:20 PM CDT | Mesoscale Discussion | SPC | Jewell, Mitchell, Osborne, Phillips, Rooks, Smith | 55 min |
| Jul 3, 9:43 PM CDT | Mesoscale Discussion | SPC | Barton, Cheyenne, Decatur, Ellis, Ellsworth, Gove and 17 more | 32 min |
| Jul 3, 11:35 PM CDT | Mesoscale Discussion | SPC | Barton, Chase, Dickinson, Douglas, Ellsworth, Franklin and 21 more | 55 min |
Nearby
Mesoscale Discussions in Kansas, 2009Every mesoscale discussion in 2009
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.