Alert archive / Nebraska / Mesoscale Discussions in 2004
Mesoscale Discussion 2102
The Storm Prediction Center issued this mesoscale discussion at Aug 25, 2004, 1:44 AM CDT for 29 counties in Nebraska. It was in force for 91 min.
The area
The outline as issued.
The facts
- Issued
- Aug 25, 2004, 1:44 AM CDT (06:44 UTC)
- Expired
- Aug 25, 2004, 3:15 AM CDT
- In force
- 91 min
- Issued by
- the Storm Prediction Center
All 29 counties
Adams County, NE, Antelope County, NE, Boone County, NE, Buffalo County, NE, Butler County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Custer County, NE, Dodge County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Howard County, NE, Kearney County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Platte County, NE, Polk County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Stanton County, NE, Thurston County, NE, Valley County, NE, Wayne County, NE, Wheeler County, NE, York County, NE
The radar
The Grand Island radar (KUEX), 83 km from the middle of the area, began a volume at 06:47 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 00:00Z, 6.7 hours before the alert went out and 171 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
- 1861 J/kg
- Mixed-layer CIN
- -51 J/kg
- Mixed-layer LCL
- 1282 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 7 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
907 ACUS11 KWNS 250646 SWOMCD SPC MCD 250644 IAZ000-NEZ000-250815- MESOSCALE DISCUSSION 2102 NWS STORM PREDICTION CENTER NORMAN OK 0144 AM CDT WED AUG 25 2004 AREAS AFFECTED...ERN NEB CONCERNING...SEVERE THUNDERSTORM POTENTIAL VALID 250644Z - 250815Z ISOLATED SEVERE THUNDERSTORMS POSSIBLE ACROSS ERN NEB...THOUGH ATTM...THREAT EXPECTED TO BE TOO ISOLATED FOR WW. A STRONG/SEVERE STORM WAS LOCATED 35 W EAR EWD AT 30-35 KT THROUGH S CENTRAL NEB. THIS STORM WAS LOCATED AT THE LEADING EDGE OF SCATTERED CONVECTION THAT EXTENDED WWD INTO NERN CO. MECHANISM FOR LIFT IS NOT TOTALLY CLEAR...THOUGH THERMAL TROUGH ALOFT SPREADING EWD INTO THE PLAINS STATES APPEARS TO BE PROVIDING THE MAIN LIFT FOR CONVECTION. EVEN THOUGH FORECAST SOUNDINGS SUGGEST THAT STORMS ARE ROOTED AROUND 800 MB...STEEP LAPSE RATES ARE RESULTING IN AROUND 2500 J/KG OF MUCAPE. STORMS ARE LIKELY NOT REALIZING SHEAR IN THE LOWEST 1-2 KM...THOUGH DEEP LAYER SHEAR ABOVE THE CAP APPEARS SUFFICIENT FOR SEVERE STORMS. HOWEVER...STRONG LOW LEVEL FORCING ASSOCIATED WITH THE LOW LEVEL JET IS LOCATED FURTHER EAST FROM NRN MO NEWD INTO THE GREAT LAKES AREA. THEREFORE...EXPECT STRONG STORMS TO REMAIN VERY ISOLATED AND UNLESS COVERAGE INCREASES MORE THAN CURRENTLY EXPECTED...WW NOT ANTICIPATED. ..IMY.. 08/25/2004 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...FSD...OAX...GID...LBF... 40259897 40849975 41489979 42159838 42369635 40919668 40299821
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 8:20 PM CDT | Severe Thunderstorm Watch | SPC | Gage, Jefferson, Johnson, Nemaha, Pawnee, Richardson and 1 more | 7 hr |
| Aug 24, 10:41 PM CDT | Mesoscale Discussion | SPC | Boone, Buffalo, Custer, Dawson, Frontier, Garfield and 11 more | 2 hr |
| Aug 24, 11:47 PM CDT | Mesoscale Discussion | SPC | Gage, Johnson, Nemaha, Pawnee, Richardson | 118 min |
| Aug 25, 8:50 AM CDT | Severe Thunderstorm Watch | SPC | Cass, Fillmore, Gage, Jefferson, Johnson, Lancaster and 6 more | 5 hr |
Nearby
Mesoscale Discussions in Nebraska, 2004Every mesoscale discussion in 2004
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.