Alert archive / Nebraska / Mesoscale Discussions in 2016
Mesoscale Discussion 464
The Storm Prediction Center issued this mesoscale discussion at Apr 26, 2016, 6:14 PM CDT for 4 states. It was in force for 61 min.
The area
The outline as issued.
The facts
- Issued
- Apr 26, 2016, 6:14 PM CDT (23:14 UTC)
- Expired
- Apr 26, 2016, 7:15 PM CDT
- In force
- 61 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 26 counties
Fremont County, IA, Mills County, IA, Page County, IA, Atchison County, KS, Brown County, KS, Doniphan County, KS, Leavenworth County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Clay County, MO, Clinton County, MO, DeKalb County, MO, Holt County, MO, Nodaway County, MO, Platte County, MO, Butler County, NE, Cass County, NE, Dodge County, NE, Douglas County, NE, Lancaster County, NE, Nemaha County, NE, Otoe County, NE, Richardson County, NE, Sarpy County, NE, Saunders County, NE
The radar
The Omaha radar (KOAX), 129 km from the middle of the area, began a volume at 23:12 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
Omaha, NE (KOAX), launched 12:00Z, 11.2 hours before the alert went out and 129 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
- 1053 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 198 m²/s²
- 0-3 km storm-relative helicity
- 394 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.1
The text
As transmitted.
525
ACUS11 KWNS 262315
SWOMCD
SPC MCD 262314
MOZ000-KSZ000-IAZ000-NEZ000-270015-
MESOSCALE DISCUSSION 0464
NWS STORM PREDICTION CENTER NORMAN OK
0614 PM CDT TUE APR 26 2016
AREAS AFFECTED...ERN NEB / SWRN IA / NERN KS / NWRN MO
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 262314Z - 270015Z
PROBABILITY OF WATCH ISSUANCE...40 PERCENT
SUMMARY...A LARGE-HAIL THREAT MAY DEVELOP OVER THE NEXT FEW HOURS.
CONSIDERABLE CONVECTIVE OVERTURNING TO THE SW OVER NERN KS CASTS
UNCERTAINTY FOR THE NEED FOR A SEVERE THUNDERSTORM WATCH.
DISCUSSION...RADAR MOSAIC SHOWS A LARGE CLUSTER OF STRONG TO SEVERE
STORMS OVER NERN KS AND SERN NEB WITH THE PRIMARY THREAT WITH THIS
ACTIVITY BEING LARGE HAIL. AN OUTFLOW BOUNDARY FROM EARLIER-DAY MCS
--CURRENTLY OVER THE LOWER OH VALLEY-- ARCS NWWD INTO E-CNTRL KS.
STORMS HAVE DEVELOPED NEAR THE BOUNDARY AND ATOP THE RESIDUAL COLD
POOL WITH PROCESSED AIR STILL EMANATING FROM CNTRL MO INTO NWRN MO.
YET...STEEP MID-LEVEL LAPSE RATES OVER KS PRIOR TO THE DEVELOPMENT
OF THE LARGE STORM CLUSTER LIKELY RESIDE IN POCKETS OVER NERN KS
INTO SERN NEB. AS THE UPPER TROUGH PIVOTS FARTHER E TOWARDS THE
REGION DURING THE EVENING...THERE WILL BE A TENDENCY FOR STORMS TO
MOVE/DEVELOP DOWNSTREAM INTO PORTIONS OF NEB/IA/KS/MO LOCATED TO THE
NE OF THE ONGOING TORNADO WATCH. AS SUCH...IT REMAINS UNCLEAR HOW
MUCH AND WIDESPREAD OF A HAIL RISK MAY DEVELOP TO THE NE OF THE
EXISTING WATCH. WILL MONITOR CONVECTIVE TRENDS IN THE SHORT-TERM TO
ASSESS THE NEED FOR A NEW SEVERE THUNDERSTORM WATCH.
..SMITH/GOSS.. 04/26/2016
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...EAX...OAX...TOP...
LAT...LON 39089514 40409616 41199733 41639671 41149536 39419403
39089514SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 2:18 AM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Clay, Cloud, Dickinson, Doniphan and 21 more | 117 min |
| Apr 26, 3:02 AM CDT | Severe Thunderstorm Watch | SPC | Brown, Clay, Cloud, Douglas, Geary, Jackson and 14 more | 6 hr |
| Apr 26, 4:37 AM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Clay, Cloud, Doniphan, Douglas and 13 more | 83 min |
| Apr 26, 6:23 AM CDT | Severe Thunderstorm Watch | SPC | Atchison, Doniphan, Johnson, Leavenworth, Miami, Wyandotte | 7 hr |
| Apr 26, 7:18 AM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Doniphan, Jefferson, Leavenworth, Wyandotte | 87 min |
| Apr 26, 10:09 AM CDT | Mesoscale Discussion | SPC | Chautauqua, Labette, Montgomery | 96 min |
| Apr 26, 1:35 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Butler, Chase, Chautauqua, Clay and 37 more | 115 min |
| Apr 26, 2:12 PM CDT | Tornado Watch | SPC | Allen, Anderson, Butler, Chase, Chautauqua, Clay and 46 more | 7 hr |
| Apr 26, 6:32 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Butler, Chase, Chautauqua, Clay and 46 more | 58 min |
| Apr 26, 10:03 AM CDT | Mesoscale Discussion | SPC | Audrain, Benton, Boone, Callaway, Camden, Carroll and 40 more | 117 min |
| Apr 26, 11:52 AM CDT | Severe Thunderstorm Watch | SPC | Bollinger, Butler, Cape Girardeau, Carter, Crawford, Dallas and 35 more | 7 hr |
| Apr 26, 2:42 PM CDT | Mesoscale Discussion | SPC | Bollinger, Cape Girardeau, Iron, Jefferson, Madison, Mississippi and 11 more | 2 hr |
| Apr 26, 3:03 PM CDT | Severe Thunderstorm Watch | SPC | Mississippi, New Madrid, Scott | 6 hr |
| Apr 26, 2:35 AM CDT | Mesoscale Discussion | SPC | Chase, Deuel, Dundy, Keith, Perkins | 115 min |
Nearby
Mesoscale Discussions in Nebraska, 2016Mesoscale Discussions in Missouri, 2016Mesoscale Discussions in Kansas, 2016Every mesoscale discussion in 2016
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.