Alert archive / Kansas / Mesoscale Discussions in 2012
Mesoscale Discussion 1907
The Storm Prediction Center issued this mesoscale discussion at Sep 6, 2012, 7:17 PM CDT for 4 states. It was in force for 88 min.
The area
The outline as issued.
The facts
- Issued
- Sep 6, 2012, 7:17 PM CDT (00:17 UTC)
- Expired
- Sep 6, 2012, 8:45 PM CDT
- In force
- 88 min
- Issued by
- the Storm Prediction Center
All 40 counties
Barton County, KS, Clark County, KS, Cloud County, KS, Comanche County, KS, Edwards County, KS, Ellis County, KS, Ellsworth County, KS, Ford County, KS, Gray County, KS, Haskell County, KS, Hodgeman County, KS, Jewell County, KS, Kiowa County, KS, Lincoln County, KS, McPherson County, KS, Meade County, KS, Mitchell County, KS, Ness County, KS, Osborne County, KS, Ottawa County, KS, Pawnee County, KS, Pratt County, KS, Reno County, KS, Republic County, KS, Rice County, KS, Rooks County, KS, Rush County, KS, Russell County, KS, Saline County, KS, Seward County, KS, Smith County, KS, Stafford County, KS, Trego County, KS, Franklin County, NE, Nuckolls County, NE, Thayer County, NE, Webster County, NE, Beaver County, OK, Harper County, OK, Lipscomb County, TX
The radar
The Dodge City radar (KDDC), 127 km from the middle of the area, began a volume at 00:21 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
Dodge City, (KDDC), launched 00:00Z, 0.3 hours before the alert went out and 123 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
- 708 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 2439 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 266 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.4
The text
As transmitted, in the capitals the NWS used until 2016.
463
ACUS11 KWNS 070018
SWOMCD
SPC MCD 070017
KSZ000-NEZ000-OKZ000-TXZ000-070145-
MESOSCALE DISCUSSION 1907
NWS STORM PREDICTION CENTER NORMAN OK
0717 PM CDT THU SEP 06 2012
AREAS AFFECTED...SOUTH-CENTRAL NEB AND NORTH-CENTRAL/WEST-CENTRAL KS
TO NORTHWEST OK/NORTHERN TX PANHANDLE
CONCERNING...SEVERE THUNDERSTORM WATCH 627...
VALID 070017Z - 070145Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 627
CONTINUES.
SUMMARY...SEVERE TSTM WATCH 627 CONTINUES UNTIL 04Z...WITH DAMAGING
WIND/SEVERE HAIL REMAINING POSSIBLE THROUGH EARLY EVENING WITHIN A
CORRIDOR ACROSS FAR SOUTH-CENTRAL NEB AND NORTH-CENTRAL/WEST-CENTRAL
KS AS WELL AS THE EASTERN OK PANHANDLE/NORTHERN TX PANHANDLE AND
NORTHWEST OK.
DISCUSSION...NEAR/EAST OF A SURFACE TROUGH...WIDELY SCATTERED
STRONG/SEVERE TSTMS INCLUDING SUSTAINED MULTICELLS AND AT LEAST A
FEW/MARGINAL SUPERCELL STRUCTURES CONTINUE FROM NEAR THE
NEB/NORTH-CENTRAL KS BORDER SOUTHWESTWARD TO NEAR DODGE CITY...AND
FARTHER SOUTHWEST INTO THE EASTERN OK PANHANDLE/NORTHERN TX
PANHANDLE AS OF 00Z. THE AMBIENT AIRMASS REMAINS WARM/MODESTLY
MOIST...WITH MLCAPE ESTIMATED TO BE ON THE ORDER OF 750-1250 J/KG
BASED ON 00Z OBSERVED SOUNDINGS FROM DODGE CITY/TOPEKA. IN THE SHORT
TERM...AFOREMENTIONED WARM/WELL-MIXED BOUNDARY LAYER IN THE PRESENCE
OF 35-45 KT EFFECTIVE SHEAR WILL REMAIN CONDUCIVE FOR
SUSTAINED/ORGANIZED STORMS CAPABLE OF SEVERE WIND/HAIL THROUGH
01Z-02Z. WITH TIME...A GRADUALLY DECOUPLING BOUNDARY
LAYER/INCREASING CINH SHOULD ACCOUNT FOR A WEAKENING INTENSITY TREND
BY MID-EVENING.
..GUYER.. 09/07/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...TOP...ICT...OUN...GID...DDC...GLD...AMA...
LAT...LON 40429878 40499765 38459727 36159997 36450162 38670016
40429878SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 2:35 PM CDT | Severe Thunderstorm Watch | SPC | Allen, Bourbon, Cherokee, Crawford, Labette, Linn and 4 more | 6 hr |
| Sep 7, 2:44 PM CDT | Mesoscale Discussion | SPC | Beckham, Blaine, Caddo, Canadian, Cleveland, Comanche and 24 more | 2 hr |
| Sep 7, 6:06 PM CDT | Mesoscale Discussion | SPC | Haskell, Latimer, LeFlore, Sequoyah | 84 min |
Nearby
Mesoscale Discussions in Kansas, 2012Mesoscale Discussions in Nebraska, 2012Mesoscale Discussions in Oklahoma, 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.