Alert archive / Oklahoma / Mesoscale Discussions in 2013
Mesoscale Discussion 1663
The Storm Prediction Center issued this mesoscale discussion at Aug 7, 2013, 9:02 PM CDT for 10 counties in Kansas; 12 counties in Oklahoma. It was in force for 88 min.
The area
The outline as issued.
The facts
- Issued
- Aug 7, 2013, 9:02 PM CDT (02:02 UTC)
- Expired
- Aug 7, 2013, 10:30 PM CDT
- In force
- 88 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 22 counties
Barber County, KS, Clark County, KS, Comanche County, KS, Edwards County, KS, Harper County, KS, Kingman County, KS, Kiowa County, KS, Pratt County, KS, Reno County, KS, Stafford County, KS, Alfalfa County, OK, Blaine County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grant County, OK, Harper County, OK, Kingfisher County, OK, Major County, OK, Woods County, OK, Woodward County, OK
The radar
The Vance AFB radar (KVNX), 78 km from the middle of the area, began a volume at 02:05 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Dodge City, (KDDC), launched 00:00Z, 2.0 hours before the alert went out and 147 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
- 1037 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 1270 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.2
The text
As transmitted, in the capitals the NWS used until 2016.
355
ACUS11 KWNS 080203
SWOMCD
SPC MCD 080202
OKZ000-KSZ000-080330-
MESOSCALE DISCUSSION 1663
NWS STORM PREDICTION CENTER NORMAN OK
0902 PM CDT WED AUG 07 2013
AREAS AFFECTED...NWRN OK...SWRN/S-CNTRL KS
CONCERNING...SEVERE POTENTIAL...WATCH LIKELY
VALID 080202Z - 080330Z
PROBABILITY OF WATCH ISSUANCE...80 PERCENT
SUMMARY...SMALL LINE SEGMENT OVER THE OK PANHANDLE HAS BEGUN TO
ACCELERATE EWD...AND MAY EXIT WW 483 DURING THE NEXT 1-2 HOURS. IF
THIS OCCURS...THEN THREAT FOR DAMAGING WINDS WILL INCREASE OVER NWRN
OK INTO SWRN/S-CNTRL KS. CONVECTIVE TRENDS ARE BEING MONITORED FOR
LIKELY WW.
DISCUSSION...AS DISCUSSED IN MCD 1662...THE COMBINATION OF ELY WINDS
IN THE 1-2 KM AGL LAYER AND A VERY MOIST AND MODERATELY/STRONGLY
UNSTABLE ENVIRONMENT WILL SUPPORT UPSCALE GROWTH INTO A FORWARD
PROPAGATING MCS TONIGHT. LATEST COMPOSITE RADAR IMAGERY SHOWS SIGNS
OF THIS TAKING PLACE OVER THE OK PANHANDLE...WHERE A SMALL LINE
SEGMENT HAS INCREASED ITS EWD MOTION TO 30 KT. GIVEN THIS
TREND...ISSUANCE OF A NEW WW IS LIKELY FOR PORTIONS OF NWRN OK AND
SWRN/S-CNTRL KS DURING THE NEXT 1-2 HOURS.
..GARNER/GOSS.. 08/08/2013
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...ICT...OUN...DDC...AMA...
LAT...LON 36520001 37839982 38259862 37699753 36139762 35609837
35579922 35839980 36520001SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 8:16 PM CDT | Mesoscale Discussion | SPC | Clark, Finney, Ford, Grant, Gray, Greeley and 9 more | 89 min |
| Aug 7, 10:24 PM CDT | Severe Thunderstorm Watch | SPC | Barber, Butler, Comanche, Cowley, Edwards, Harper and 8 more | 7 hr |
| Aug 7, 11:30 PM CDT | Mesoscale Discussion | SPC | Clark, Finney, Ford, Gray, Greeley, Haskell and 4 more | 60 min |
| Aug 8, 3:18 AM CDT | Mesoscale Discussion | SPC | Allen, Butler, Chase, Chautauqua, Coffey, Cowley and 15 more | 87 min |
| Aug 8, 3:57 AM CDT | Severe Thunderstorm Watch | SPC | Allen, Anderson, Bourbon, Chase, Chautauqua, Cherokee and 12 more | 3 hr |
| Aug 8, 3:00 PM CDT | Mesoscale Discussion | SPC | Beaver, Beckham, Cimarron, Ellis, Greer, Harmon and 2 more | 60 min |
| Aug 8, 3:21 PM CDT | Severe Thunderstorm Watch | SPC | Beaver, Beckham, Cimarron, Custer, Dewey, Greer and 7 more | 9 hr |
| Aug 8, 5:02 PM CDT | Mesoscale Discussion | SPC | Blaine, Caddo, Canadian, Carter, Cleveland, Coal and 30 more | 88 min |
| Aug 8, 5:24 PM CDT | Mesoscale Discussion | SPC | Adair, Cherokee, Delaware, Haskell, Latimer, LeFlore and 1 more | 66 min |
| Aug 8, 5:32 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Cherokee, Creek, Delaware, Haskell, Latimer and 11 more | 6 hr |
| Aug 8, 6:23 PM CDT | Severe Thunderstorm Watch | SPC | Atoka, Blaine, Bryan, Caddo, Canadian, Carter and 22 more | 8 hr |
| Aug 8, 6:47 PM CDT | Mesoscale Discussion | SPC | Beaver, Beckham, Cimarron, Custer, Dewey, Greer and 7 more | 88 min |
Nearby
Mesoscale Discussions in Oklahoma, 2013Mesoscale Discussions in Kansas, 2013Every mesoscale discussion in 2013
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.