Alert archive / Iowa / Mesoscale Discussions in 2014
Mesoscale Discussion 1213
The Storm Prediction Center issued this mesoscale discussion at Jun 30, 2014, 10:48 AM CDT for 13 counties in Iowa; 4 counties in Nebraska. It was in force for 87 min.
The area
The outline as issued.
The facts
- Issued
- Jun 30, 2014, 10:48 AM CDT (15:48 UTC)
- Expired
- Jun 30, 2014, 12:15 PM CDT
- In force
- 87 min
- Issued by
- the Storm Prediction Center
Counties Audubon County, IA, Calhoun County, IA, Carroll County, IA, Crawford County, IA, Greene County, IA, Guthrie County, IA, Harrison County, IA, Ida County, IA, Monona County, IA, Sac County, IA, Shelby County, IA, Webster County, IA, Woodbury County, IA, Burt County, NE, Cuming County, NE, Dakota County, NE, Thurston County, NE
The radar
The Omaha radar (KOAX), 93 km from the middle of the area, began a volume at 15:50 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, 3.8 hours before the alert went out and 94 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
- 4563 J/kg
- Mixed-layer CIN
- -72 J/kg
- Mixed-layer LCL
- 903 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 162 m²/s²
- Significant tornado parameter
- 2.8
- Supercell composite
- 12.1
The text
As transmitted, in the capitals the NWS used until 2016.
212
ACUS11 KWNS 301548
SWOMCD
SPC MCD 301548
IAZ000-NEZ000-SDZ000-301715-
MESOSCALE DISCUSSION 1213
NWS STORM PREDICTION CENTER NORMAN OK
1048 AM CDT MON JUN 30 2014
AREAS AFFECTED...NERN NEB INTO WEST CENTRAL AND CENTRAL IA
CONCERNING...TORNADO WATCH 373...
VALID 301548Z - 301715Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 373 CONTINUES.
SUMMARY...THROUGH AT LEAST 16-17Z...AN INCREASING THREAT FOR
DAMAGING WINDS EXISTS FROM FAR NERN NEBRASKA INTO WEST CENTRAL AND
CENTRAL IOWA ATTENDANT TO A FAST-MOVING BOWING LINE OF STORMS.
DISCUSSION...TRENDS IN MORNING RADAR IMAGERY SHOWED CLUSTERS OF
STORMS HAD GROWN UPSCALE INTO A FAST-MOVING BOWING LINE OF
STORMS...NOW LOCATED IN FAR NERN NEB. THIS BOW...MOVING EAST AT 50
KT...PRODUCED AN OBSERVED WIND GUST TO 51 KT AT 1450Z AT NORFOLK,
NEBRASKA AND WILL BEGIN TO AFFECT ADJACENT WEST CENTRAL IA /SRN
PLYMOUTH COUNTY TO HARRISON COUNTY/ BY 16Z. AT THAT FAST FORWARD
SPEED...SIGNIFICANT WIND DAMAGE IS POSSIBLE. THE EWD TRACK IS
EXPECTED TO BE MAINTAINED...AT LEAST IN THE SHORT TERM /THROUGH
17-18Z/...WITH THIS BOW MOVING ALONG A STRONG INSTABILITY GRADIENT.
..PETERS.. 06/30/2014
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...DMX...FSD...OAX...
LAT...LON 41769722 42029689 42389678 42559676 42519554 42489406
42219394 41619426 41549471 41619627 41769722SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 7:50 PM CDT | Mesoscale Discussion | SPC | Buchanan, Clayton, Delaware, Dubuque, Fayette, Jackson and 2 more | 85 min |
| Jun 29, 8:15 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Benton, Buchanan, Cedar, Chickasaw, Clayton and 14 more | 7 hr |
| Jun 29, 9:43 PM CDT | Mesoscale Discussion | SPC | Allamakee, Buchanan, Cedar, Clayton, Clinton, Delaware and 6 more | 92 min |
| Jun 29, 10:10 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Clarke, Dallas, Decatur and 16 more | 65 min |
| Jun 29, 10:54 PM CDT | Tornado Watch | SPC | Clinton, Jackson | 5 hr |
| Jun 30, 3:32 AM CDT | Mesoscale Discussion | SPC | Audubon, Boone, Calhoun, Carroll, Cherokee, Crawford and 15 more | 58 min |
| Jun 30, 4:06 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Calhoun and 42 more | 10 hr |
| Jun 30, 7:16 AM CDT | Mesoscale Discussion | SPC | Audubon, Benton, Black Hawk, Boone, Bremer, Buchanan and 36 more | 89 min |
| Jun 30, 9:08 AM CDT | Mesoscale Discussion | SPC | Adair, Adams, Cass, Harrison, Mills, Montgomery and 2 more | 67 min |
| Jun 30, 9:38 AM CDT | Tornado Watch | SPC | Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 46 more | 10 hr |
| Jun 30, 1:27 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Audubon, Benton, Black Hawk and 60 more | 93 min |
| Jun 30, 2:03 PM CDT | Tornado Watch | SPC | Benton, Buchanan, Cedar, Clayton, Clinton, Delaware and 17 more | 5 hr |
| Jun 30, 3:17 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Audubon, Boone, Carroll and 28 more | 58 min |
| Jun 30, 3:25 PM CDT | Mesoscale Discussion | SPC | Allamakee, Benton, Buchanan, Cedar, Clayton, Clinton and 18 more | 35 min |
| Jun 30, 6:28 PM CDT | Mesoscale Discussion | SPC | Benton, Cedar, Clinton, Dubuque, Iowa, Jackson and 10 more | 92 min |
| Jun 29, 11:53 PM CDT | Mesoscale Discussion | SPC | Adams, Buffalo, Clay, Custer, Dawson, Franklin and 13 more | 97 min |
| Jun 30, 1:02 AM CDT | Severe Thunderstorm Watch | SPC | Adams, Antelope, Blaine, Boone, Brown, Buffalo and 31 more | 10 hr |
| Jun 30, 12:06 PM CDT | Mesoscale Discussion | SPC | Pawnee, Richardson | 54 min |
| Jun 30, 3:52 PM CDT | Mesoscale Discussion | SPC | Gage, Johnson, Nemaha, Pawnee, Richardson | 113 min |
Nearby
Mesoscale Discussions in Iowa, 2014Mesoscale Discussions in Nebraska, 2014Every mesoscale discussion in 2014
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.