Alert archive / Nebraska / Mesoscale Discussions in 2014
Mesoscale Discussion 792
The Storm Prediction Center issued this mesoscale discussion at Jun 3, 2014, 12:07 PM CDT for 21 counties in Nebraska; 8 counties in South Dakota. It was in force for 83 min.
The area
The outline as issued.
The facts
- Issued
- Jun 3, 2014, 12:07 PM CDT (17:07 UTC)
- Expired
- Jun 3, 2014, 1:30 PM CDT
- In force
- 83 min
- Issued by
- the Storm Prediction Center
All 29 counties
Antelope County, NE, Blaine County, NE, Boone County, NE, Boyd County, NE, Brown County, NE, Cedar County, NE, Dixon County, NE, Garfield County, NE, Greeley County, NE, Holt County, NE, Keya Paha County, NE, Knox County, NE, Loup County, NE, Madison County, NE, Pierce County, NE, Platte County, NE, Rock County, NE, Stanton County, NE, Valley County, NE, Wayne County, NE, Wheeler County, NE, Bon Homme County, SD, Charles Mix County, SD, Clay County, SD, Douglas County, SD, Gregory County, SD, Hutchinson County, SD, Tripp County, SD, Yankton County, SD
The radar
The North Platte radar (KLNX), 163 km from the middle of the area, began a volume at 17:08 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 5.1 hours before the alert went out and 222 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
- 1655 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 898 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 108 m²/s²
- 0-3 km storm-relative helicity
- 280 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 5.6
The text
As transmitted, in the capitals the NWS used until 2016.
188
ACUS11 KWNS 031707
SWOMCD
SPC MCD 031707
NEZ000-SDZ000-031830-
MESOSCALE DISCUSSION 0792
NWS STORM PREDICTION CENTER NORMAN OK
1207 PM CDT TUE JUN 03 2014
AREAS AFFECTED...PARTS OF SRN SOUTH DAKOTA INTO N CNTRL/NERN NEB
CONCERNING...SEVERE THUNDERSTORM WATCH 206...
VALID 031707Z - 031830Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 206
CONTINUES.
SUMMARY...SEVERE THREAT CONTINUES WITH ONE OR MORE GROWING AND
CONSOLIDATING CONVECTIVE CLUSTERS EXPECTED BY LATE AFTERNOON.
SUPERCELLS ARE POSSIBLE AS THIS OCCURS...WITH THE RISK FOR SEVERE
HAIL/STRONG WIND GUSTS AND TORNADOES INCREASING THROUGH 20-22Z. AT
LEAST PORTIONS OF THE WATCH AND AREAS TO THE SOUTH/EAST ARE BEING
MONITORED FOR A TORNADO WATCH.
DISCUSSION...INTENSE CONVECTION NOW EAST OF VALENTINE HAS TAKEN A
SOUTHEASTWARD TURN DURING THE PAST HOUR OR SO. THIS LIKELY IS
FOCUSED WITHIN A ZONE OF ENHANCED WARM ADVECTION /ROUGHLY DELINEATED
BY THE 700 MB THERMAL GRADIENT/ WHICH MAY SUPPORT SOUTHEASTWARD
DEVELOPMENT INTO AREA NORTH THROUGH WEST OF NORFOLK THROUGH 19-21Z.
AT THE SAME TIME...WITH CONTINUED BOUNDARY LAYER HEATING AND MIXING
ACROSS WEST CENTRAL NEBRASKA...STRENGTHENING LOWER LEVEL WARM
ADVECTION AND CONVERGENCE ON THE NOSE OF A 30 KT SOUTHERLY 850 MB
JET SEEMS LIKELY TO SUPPORT ADDITIONAL INTENSE STORM DEVELOPMENT
ACROSS NORTH CENTRAL NEBRASKA...NEAR/SOUTH THROUGH SOUTHEAST OF
VALENTINE.
IN THE PRESENCE OF STEEP MID-LEVEL LAPSE RATES...AND MODERATELY
LARGE BOUNDARY-LAYER BASED CAPE...SUPERCELLS ARE LIKELY WITH
ACTIVITY GRADUALLY CONGEALING/CONSOLIDATING WITH DOWNSTREAM ACTIVITY
INTO A GROWING CONVECTIVE CLUSTER. THE RISK FOR TORNADOES IS
EXPECTED TO INCREASE TOWARD 20-22Z...IN ADDITION TO A CONTINUING
RISK FOR SEVERE HAIL...AND POTENTIALLY DAMAGING WIND GUSTS.
..KERR.. 06/03/2014
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...FSD...OAX...ABR...GID...LBF...UNR...
LAT...LON 43699945 43389772 43059687 42159680 41599708 41399831
41569909 42190064 42750113 43450046 43699945SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 3, 3:02 AM CDT | Mesoscale Discussion | SPC | Blaine, Brown, Cherry, Grant, Hooker, Keya Paha and 6 more | 118 min |
| Jun 3, 7:00 AM CDT | Mesoscale Discussion | SPC | Blaine, Brown, Garfield, Greeley, Holt, Howard and 6 more | 2 hr |
| Jun 3, 9:36 AM CDT | Severe Thunderstorm Watch | SPC | Boyd, Brown, Cherry, Holt, Keya Paha, Rock and 2 more | 7 hr |
| Jun 3, 1:12 PM CDT | Tornado Watch | SPC | Adams, Antelope, Blaine, Boone, Brown, Buffalo and 55 more | 10 hr |
| Jun 3, 1:20 PM CDT | Mesoscale Discussion | SPC | Arthur, Banner, Box Butte, Cheyenne, Dawes, Deuel and 7 more | 85 min |
| Jun 3, 2:37 PM CDT | Severe Thunderstorm Watch | SPC | Dawes, Sioux | 6 hr |
| Jun 3, 3:11 PM CDT | Tornado Watch | SPC | Arthur, Box Butte, Cherry, Deuel, Garden, Grant and 10 more | 7 hr |
| Jun 3, 3:48 PM CDT | Mesoscale Discussion | SPC | Antelope, Boone, Burt, Butler, Colfax, Cuming and 18 more | 87 min |
| Jun 3, 4:37 PM CDT | Mesoscale Discussion | SPC | Cass, Douglas, Nemaha, Sarpy, Washington | 83 min |
| Jun 3, 4:54 PM CDT | Mesoscale Discussion | SPC | Adams, Blaine, Boone, Buffalo, Butler, Clay and 36 more | 96 min |
| Jun 3, 5:59 PM CDT | Tornado Watch | SPC | Adams, Blaine, Boone, Buffalo, Butler, Cass and 43 more | 7 hr |
| Jun 3, 6:40 PM CDT | Mesoscale Discussion | SPC | Dawes, Sioux | 65 min |
| Jun 3, 1:51 PM CDT | Mesoscale Discussion | SPC | Butte, Harding | 114 min |
Nearby
Mesoscale Discussions in Nebraska, 2014Mesoscale Discussions in South Dakota, 2014Every mesoscale discussion in 2014
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.