Alert archive / Nebraska / Mesoscale Discussions in 2005
Mesoscale Discussion 751
The Storm Prediction Center issued this mesoscale discussion at May 6, 2005, 7:56 PM MDT for 20 counties in Nebraska; Bennett County, Todd County, South Dakota. It was in force for 94 min.
The area
The outline as issued.
The facts
- Issued
- May 6, 2005, 7:56 PM MDT (01:56 UTC)
- Expired
- May 6, 2005, 9:30 PM MDT
- In force
- 94 min
- Issued by
- the Storm Prediction Center
All 22 counties
Arthur County, NE, Blaine County, NE, Brown County, NE, Buffalo County, NE, Cherry County, NE, Custer County, NE, Dawson County, NE, Garfield County, NE, Grant County, NE, Greeley County, NE, Hooker County, NE, Keya Paha County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Rock County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE, Bennett County, SD, Todd County, SD
The radar
The North Platte radar (KLNX), 10 km from the middle of the area, began a volume at 02:00 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
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.9 hours before the alert went out and 102 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
- 1660 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 1882 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 124 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 2.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 070156 SWOMCD SPC MCD 070156 NEZ000-SDZ000-070330- MESOSCALE DISCUSSION 0751 NWS STORM PREDICTION CENTER NORMAN OK 0856 PM CDT FRI MAY 06 2005 AREAS AFFECTED...NEB...SD...ERN CO...WRN KS CONCERNING...SEVERE THUNDERSTORM WATCH 222... VALID 070156Z - 070330Z CURRENT INDICATIONS ARE WW MAY BE ALLOWED TO EXPIRE AS SCHEDULED AT 03Z. CONVECTION CONTINUES TO SLOWLY CONGEAL/CONSOLIDATE IN THE VICINITY OF LEE SURFACE TROUGH ACROSS THE NORTH CENTRAL HIGH PLAINS. BOUNDARY LAYER COOLING IS ONGOING...AND ACTIVITY MOST LIKELY IS ALREADY BASED ABOVE NEAR SURFACE INVERSION LAYER. FORCING FOR CONVECTIVE DEVELOPMENT INTO THE OVERNIGHT HOURS IS SOMEWHAT UNCERTAIN...BUT WARM ADVECTION/CONVERGENCE ON NOSE OF SOUTHERLY LOW-LEVEL JET MAY PROVIDE SUPPORT FOR PRIMARY NEW DEVELOPMENT THROUGH THE 03-06Z TIME FRAME. THIS APPEARS TO BE IN PROCESS OF BECOMING FOCUSED ACROSS NORTH CENTRAL NEBRASKA...BETWEEN BROKEN BOW AND VALENTINE...BEFORE LOW-LEVEL JET AXIS CONTINUES TO VEER TO A MORE SOUTHWESTERLY COMPONENT OVERNIGHT. WEAK FLOW WITHIN MID/UPPER RIDGE ACROSS THIS REGION WILL MINIMIZE SHEAR...BUT THERMODYNAMIC ENVIRONMENT MAY REMAIN FAVORABLE FOR OCCASIONAL LARGE HAIL IN STRONGER STORMS. ..KERR.. 05/07/2005 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...GID...LBF...UNR... 42990250 43440075 42649886 41329843 40599940 40870051 41560175
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 7, 11:23 AM MDT | Mesoscale Discussion | SPC | Blaine, Boyd, Brown, Cherry, Custer, Dawson and 13 more | 3 hr |
| May 7, 12:15 PM MDT | Mesoscale Discussion | SPC | Franklin, Frontier, Furnas, Gosper, Harlan, Kearney and 3 more | 3 hr |
| May 7, 12:50 PM MDT | Severe Thunderstorm Watch | SPC | Adams, Blaine, Boyd, Brown, Buffalo, Cherry and 29 more | 7 hr |
| May 7, 4:02 PM MDT | Mesoscale Discussion | SPC | Burt, Butler, Cass, Cedar, Colfax, Cuming and 19 more | 118 min |
| May 7, 4:32 PM MDT | Mesoscale Discussion | SPC | Adams, Antelope, Boone, Boyd, Buffalo, Butler and 36 more | 118 min |
| May 6, 10:36 PM MDT | Mesoscale Discussion | SPC | Lincoln, Minnehaha | 54 min |
| May 7, 2:25 PM MDT | Mesoscale Discussion | SPC | Brown, Campbell, Corson, Dewey, Edmunds, Faulk and 4 more | 2 hr |
| May 7, 3:40 PM MDT | Severe Thunderstorm Watch | SPC | Campbell, Corson, Dewey, Edmunds, Faulk, Hand and 5 more | 5 hr |
| May 7, 5:47 PM MDT | Mesoscale Discussion | SPC | Brown, Campbell, Edmunds, Faulk, McPherson, Walworth | 118 min |
Nearby
Mesoscale Discussions in Nebraska, 2005Mesoscale Discussions in South Dakota, 2005Every mesoscale discussion in 2005
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.