Alert archive / Nebraska / Mesoscale Discussions in 2007
Mesoscale Discussion 697
The Storm Prediction Center issued this mesoscale discussion at May 5, 2007, 6:59 AM CDT for Republic County, Washington County, Kansas; 47 counties in Nebraska. It was in force for 61 min.
The area
The outline as issued.
The facts
- Issued
- May 5, 2007, 6:59 AM CDT (11:59 UTC)
- Expired
- May 5, 2007, 8:00 AM CDT
- In force
- 61 min
- Issued by
- the Storm Prediction Center
All 49 counties
Republic County, KS, Washington County, KS, Adams County, NE, Antelope County, NE, Boone County, NE, Buffalo County, NE, Butler County, NE, Cedar County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Custer County, NE, Dawson County, NE, Dodge County, NE, Fillmore County, NE, Franklin County, NE, Gage County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Howard County, NE, Jefferson County, NE, Johnson County, NE, Kearney County, NE, Knox County, NE, Lancaster County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Pawnee County, NE, Phelps County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Saline County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Stanton County, NE, Thayer County, NE, Valley County, NE, Wayne County, NE, Webster County, NE, Wheeler County, NE, York County, NE
The radar
The Omaha radar (KOAX), 107 km from the middle of the area, began a volume at 11:59 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
Omaha, NE (KOAX), launched 00:00Z, 12.0 hours before the alert went out and 107 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
- 753 J/kg
- Mixed-layer CIN
- -96 J/kg
- Mixed-layer LCL
- 1271 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 051159 SWOMCD SPC MCD 051159 NEZ000-KSZ000-SDZ000-051300- MESOSCALE DISCUSSION 0697 NWS STORM PREDICTION CENTER NORMAN OK 0659 AM CDT SAT MAY 05 2007 AREAS AFFECTED...KS...NEB CONCERNING...TORNADO WATCH 231... VALID 051159Z - 051300Z THE SEVERE WEATHER THREAT FOR TORNADO WATCH 231 CONTINUES. NUMEROUS STRONG STORMS PERSIST WITHIN TORNADO WATCH 231 EARLY THIS MORNING. THE BULK OF THIS CONVECTION NOW APPEARS TO BE OCCURRING NORTH OF A WARM FRONT LOCATED NEAR THE KS/NEB BORDER. CONTINUED STRONG LOW LEVEL MASS INFLOW ON 60KT LLJ...AND STRONGLY DIFFLUENT FLOW ALOFT...WILL MAINTAIN DEEP CONVECTION ACROSS ERN NEB THROUGH THE NEXT COUPLE OF HOURS. WHILE TORNADO POTENTIAL IN THE WATCH APPEARS TO HAVE DECREASED FOR NOW...A FEW STORMS COULD STILL POSE A RISK OF HAIL AND GUSTY WINDS THROUGH WATCH EXPIRATION AT 13Z. VERY UNSTABLE CONDITIONS PERSIST ACROSS THE WARM SECTOR...FROM SRN NEB ACROSS KS AND THE SRN PLAINS. THIS REGION WILL NEED TO BE MONITORED CLOSELY FOR NEW TSTM DEVELOPMENT AS THE MORNING PROGRESSES. ..CARBIN.. 05/05/2007 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...FSD...OAX...TOP...GID...LBF... 39589683 40350022 41680022 41789919 42289841 42869830 42889718 41849642 40579638 40529607 40009600 39959681
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 7:26 PM CDT | Tornado Watch | SPC | Decatur, Gove, Graham, Jewell, Mitchell, Norton and 5 more | 7 hr |
| May 4, 8:06 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Clark, Comanche, Edwards, Ford and 6 more | 84 min |
| May 4, 8:29 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Sherman | 91 min |
| May 4, 9:41 PM CDT | Mesoscale Discussion | SPC | Decatur, Graham, Norton, Osborne, Phillips, Rooks and 2 more | 94 min |
| May 4, 10:34 PM CDT | Mesoscale Discussion | SPC | Clay, Dickinson, Geary, Marion, Marshall, Morris and 2 more | 56 min |
| May 4, 11:10 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Clark, Comanche, Edwards, Ellsworth and 12 more | 95 min |
| May 4, 11:28 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Sherman, Wallace | 92 min |
| May 5, 1:23 AM CDT | Mesoscale Discussion | SPC | Barton, Clay, Cloud, Decatur, Ellis, Ellsworth and 15 more | 67 min |
| May 5, 1:30 AM CDT | Tornado Watch | SPC | Clay, Cloud, Dickinson, Ellsworth, Jewell, Lincoln and 10 more | 7 hr |
| May 5, 3:00 AM CDT | Mesoscale Discussion | SPC | Barton, Clay, Cloud, Dickinson, Ellsworth, Jewell and 12 more | 90 min |
| May 5, 8:52 AM CDT | Mesoscale Discussion | SPC | Barber, Barton, Clark, Cloud, Comanche, Decatur and 40 more | 53 min |
| May 5, 9:51 AM CDT | Tornado Watch | SPC | Barton, Cheyenne, Decatur, Ellis, Ellsworth, Gove and 21 more | 12 hr |
| May 5, 11:32 AM CDT | Mesoscale Discussion | SPC | Norton, Phillips, Smith | 88 min |
| May 5, 11:57 AM CDT | Mesoscale Discussion | SPC | Barber, Clark, Comanche, Edwards, Harper, Kingman and 3 more | 93 min |
| May 5, 12:15 PM CDT | Tornado Watch | SPC | Barber, Clark, Comanche, Edwards, Finney, Ford and 16 more | 10 hr |
| May 5, 2:32 PM CDT | Mesoscale Discussion | SPC | Clay, Cloud, Dickinson, Geary, Marshall, Morris and 5 more | 28 min |
| May 5, 2:42 PM CDT | Tornado Watch | SPC | Brown, Chase, Clay, Cloud, Dickinson, Geary and 15 more | 7 hr |
| May 5, 3:26 PM CDT | Mesoscale Discussion | SPC | Barton, Clark, Comanche, Edwards, Ellis, Ford and 14 more | 94 min |
| May 5, 6:16 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Clark, Cloud, Comanche, Edwards and 14 more | 59 min |
| May 4, 8:49 PM CDT | Mesoscale Discussion | SPC | Antelope, Cedar, Dixon, Knox, Madison, Pierce and 1 more | 56 min |
| May 4, 9:22 PM CDT | Tornado Watch | SPC | Antelope, Boone, Cedar, Knox, Pierce | 11 hr |
| May 5, 10:35 AM CDT | Mesoscale Discussion | SPC | Antelope, Boyd, Brown, Burt, Cedar, Cherry and 13 more | 85 min |
| May 5, 10:55 AM CDT | Tornado Watch | SPC | Antelope, Boyd, Brown, Cedar, Dakota, Dixon and 7 more | 6 hr |
| May 5, 1:01 PM CDT | Mesoscale Discussion | SPC | Boyd, Cedar, Dakota, Dixon, Holt, Knox and 2 more | 89 min |
| May 5, 1:45 PM CDT | Mesoscale Discussion | SPC | Arthur, Box Butte, Cherry, Dawes, Deuel, Garden and 8 more | 2 hr |
| May 5, 4:09 PM CDT | Mesoscale Discussion | SPC | Boyd, Cedar, Dakota, Dixon, Holt, Keya Paha and 4 more | 96 min |
| May 5, 4:33 PM CDT | Tornado Watch | SPC | Antelope, Boyd, Brown, Cedar, Cherry, Dakota and 8 more | 6 hr |
Nearby
Mesoscale Discussions in Nebraska, 2007Mesoscale Discussions in Kansas, 2007Every mesoscale discussion in 2007
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.