Alert archive / Nebraska / Mesoscale Discussions in 2003
Mesoscale Discussion 41
The Storm Prediction Center issued this mesoscale discussion at Feb 3, 2003, 3:34 AM CST for 12 counties in Kansas; 20 counties in Nebraska. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 3, 2003, 3:34 AM CST (09:34 UTC)
- Expired
- Feb 3, 2003, 8:30 AM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 32 counties
Ellis County, KS, Graham County, KS, Jewell County, KS, Mitchell County, KS, Norton County, KS, Osborne County, KS, Phillips County, KS, Rooks County, KS, Russell County, KS, Sheridan County, KS, Smith County, KS, Trego County, KS, Adams County, NE, Boone County, NE, Buffalo County, NE, Clay County, NE, Franklin County, NE, Furnas County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Howard County, NE, Kearney County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Phelps County, NE, Sherman County, NE, Webster County, NE, York County, NE
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 9.6 hours before the alert went out and 187 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
- 1 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 521 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 314 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
337 ACUS11 KWNS 030935 SWOMCD SPC MCD 030934 KSZ000-NEZ000-031430- MESOSCALE DISCUSSION 0041 NWS STORM PREDICTION CENTER NORMAN OK 0334 AM CST MON FEB 03 2003 AREAS AFFECTED...N-CENTRAL KS AND CENTRAL/S-CENTRAL NEB CONCERNING...HEAVY SNOW AND NEAR BLIZZARD CONDITIONS VALID 030934Z - 031430Z BRIEFLY HEAVY SNOW AND SIGNIFICANT BLOWING SNOW IS EXPECTED ACROSS N-CENTRAL KS AND CENTRAL/S-CENTRAL SECTIONS OF NEB THROUGH THE REMAINDER OF THIS MORNING. SNOWFALL RATES OF 1/HR ARE POSSIBLE LOCALLY FOR A PERIOD OF 1-2 HOURS AS REGION OF ASCENT/ PRECIPITATION SHIFTS EWD ACROSS THE DISCUSSION AREA. REGION OF MID-UPPER LEVEL DIFFLUENT FLOW CONTINUES E/NE OF VORTICITY MAX OVER ERN CO AND 300MB JET STREAK EXTENDING SW-NE ACROSS KS AND FAR SERN NEB. LARGE-SCALE FLOW PATTERN SHOULD CONTINUE TO SUPPORT ASCENT AND AN EWD CONTINUATION OF PRECIPITATION REGION EXTENDING FROM 50 S GLD TO 45 SE LBF AT 0915Z. ADDITIONALLY...STRONG LOW-LEVEL PRESSURE GRADIENT AND 50KT NLY LOW-LEVEL JET WITHIN STEEP LOW-LEVEL LAPSE RATE REGIME WILL CONTINUE TO SUPPORT NLY SURFACE WINDS OF 25-35KT WITH POSSIBLE HIGHER GUSTS CAUSING CONSIDERABLE BLOWING OF SNOW THROUGHOUT THE MORNING. SNOW WILL TAPER OFF FROM WEST TO EAST ACROSS N-CENTRAL KS/S-CENTRAL NEB TOWARD 18Z AS 500MB TROUGH AXIS MOVES EAST OF THE REGION FAVORING SUBSIDENCE WITH ANTICYCLONIC VORTICITY ADVECTION. ..BANACOS.. 02/03/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... 38729926 38720032 39100062 39720050 40649975 41689864 41739796 40979757 39799786 39069833
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 2, 6:41 PM CST | Mesoscale Discussion | SPC | Cheyenne | 7 hr |
| Feb 3, 9:38 AM CST | Mesoscale Discussion | SPC | Atchison, Brown, Clay, Cloud, Doniphan, Jackson and 8 more | 5 hr |
Nearby
Mesoscale Discussions in Nebraska, 2003Mesoscale Discussions in Kansas, 2003Every mesoscale discussion in 2003
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.