Alert archive / Iowa / Mesoscale Discussions in 2008
Mesoscale Discussion 101
The Storm Prediction Center issued this mesoscale discussion at Jan 29, 2008, 7:39 AM CST for 6 states. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jan 29, 2008, 7:39 AM CST (13:39 UTC)
- Expired
- Jan 29, 2008, 12:45 PM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 91 counties
Audubon County, IA, Buena Vista County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cerro Gordo County, IA, Cherokee County, IA, Chickasaw County, IA, Clay County, IA, Crawford County, IA, Dickinson County, IA, Emmet County, IA, Floyd County, IA, Franklin County, IA, Fremont County, IA, Greene County, IA, Hancock County, IA, Harrison County, IA, Howard County, IA, Humboldt County, IA, Ida County, IA, Kossuth County, IA, Lyon County, IA, Mills County, IA, Mitchell County, IA, Monona County, IA, Montgomery County, IA, O'Brien County, IA, Osceola County, IA, Page County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Pottawattamie County, IA, Sac County, IA, Shelby County, IA, Sioux County, IA, Webster County, IA, Winnebago County, IA, Winneshiek County, IA, Woodbury County, IA, Worth County, IA, Wright County, IA, Marshall County, KS, Nemaha County, KS, Washington County, KS, Blue Earth County, MN, Cottonwood County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Jackson County, MN, Martin County, MN, Mower County, MN, Nobles County, MN, Olmsted County, MN, Rice County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Watonwan County, MN, Atchison County, MO, Burt County, NE, Butler County, NE, Cass County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Gage County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Stanton County, NE, Thayer County, NE, Thurston County, NE, Washington County, NE, York County, NE, Union County, SD
The radar
The Des Moines radar (KDMX), 118 km from the middle of the area, began a volume at 13:39 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, 1.7 hours before the alert went out and 130 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
- 789 m above ground
- 0-6 km bulk shear
- 87 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 668 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 291340 SWOMCD SPC MCD 291339 IAZ000-MNZ000-MOZ000-NEZ000-KSZ000-SDZ000-291845- MESOSCALE DISCUSSION 0101 NWS STORM PREDICTION CENTER NORMAN OK 0739 AM CST TUE JAN 29 2008 AREAS AFFECTED...ERN NEB...EXTREME NERN KS AND NW MO...WRN AND NRN IA...SRN MN CONCERNING...BLIZZARD VALID 291339Z - 291845Z BANDS OF LOCALLY HEAVY SNOW WILL COMBINE WITH VERY STRONG WINDS TO PRODUCE BLIZZARD CONDITIONS AT TIMES. A NARROW NE/SW BAND OF MDT TO HVY SNOW HAS DEVELOPED WITHIN ZONE OF DEEP FRONTOGENETICAL FORCING FROM NWRN IA ACROSS E CNTRL NEB AND INTO NRN KS. RADAR TRENDS ALSO INDICATE NEW BANDS DEVELOPING ACROSS NRN IA INTO SRN MN MOST LIKELY RELATED TO FRONTOGENESIS IN THE 700-800 MB LAYER. AS UPPER TROUGH CONTINUES TO DEEPEN...ZONE OF THERMAL PACKING/FORCING WILL BE MAINTAINED AS IT SHIFTS EWD OUT OF NEB INTO WRN IA...WITH ADDITIONAL AREAS FILLING IN ACROSS NRN IA/SRN MN. BRIEF SNOWFALL RATES NEAR 1/HR ARE LIKELY...WHICH WILL COMBINE WITH VERY STRONG WIND GUSTS OF 30-40 MPH TO PRODUCE NEAR ZERO VISIBILITY AT TIMES. ..JEWELL.. 01/29/2008 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ...NOTICE... SPC WINTER WEATHER MESOSCALE DISCUSSIONS WILL BE ISSUED ON A SCHEDULED BASIS FROM DECEMBER 1 THROUGH FEBRUARY 28...FOUR TIMES A DAY...AROUND 00 UTC...06 UTC...12 UTC...AND 18 UTC FOR SIGNIFICANT SHORT RANGE WINTER WEATHER EVENTS. ATTN...WFO...ARX...MPX...DMX...EAX...FSD...OAX...TOP...GID... 40099799 42369702 43299638 43989551 44429307 44389213 43309159 42819257 42659364 41529474 40099535 39479622 39479718
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 29, 12:19 PM CST | Mesoscale Discussion | SPC | Appanoose, Benton, Cedar, Clinton, Davis, Delaware and 20 more | 4 hr |
| Jan 29, 10:34 AM CST | Mesoscale Discussion | SPC | Houston, Wabasha, Winona | 4 hr |
| Jan 29, 10:21 AM CST | Mesoscale Discussion | SPC | Bollinger, Butler, Cape Girardeau, Dunklin, Mississippi, New Madrid and 3 more | 54 min |
| Jan 29, 10:54 AM CST | Mesoscale Discussion | SPC | Bollinger, Butler, Cape Girardeau, Carter, Dunklin, Iron and 12 more | 66 min |
| Jan 29, 11:32 AM CST | Tornado Watch | SPC | Bollinger, Butler, Cape Girardeau, Carter, Crawford, Dent and 24 more | 7 hr |
| Jan 29, 3:56 PM CST | Mesoscale Discussion | SPC | Bollinger, Cape Girardeau, Mississippi, New Madrid, Perry, Scott and 1 more | 64 min |
Nearby
Mesoscale Discussions in Iowa, 2008Mesoscale Discussions in Nebraska, 2008Mesoscale Discussions in Minnesota, 2008Every mesoscale discussion in 2008
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.