Alert archive / Iowa / Mesoscale Discussions in 2014
Mesoscale Discussion 1113
The Storm Prediction Center issued this mesoscale discussion at Jun 22, 2014, 11:19 AM CDT for 4 states. It was in force for 101 min.
The area
The outline as issued.
The facts
- Issued
- Jun 22, 2014, 11:19 AM CDT (16:19 UTC)
- Expired
- Jun 22, 2014, 1:00 PM CDT
- In force
- 101 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 61 counties
Allamakee County, IA, Appanoose County, IA, Benton County, IA, Black Hawk County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Cedar County, IA, Chickasaw County, IA, Clayton County, IA, Clinton County, IA, Davis County, IA, Delaware County, IA, Des Moines County, IA, Dubuque County, IA, Fayette County, IA, Floyd County, IA, Grundy County, IA, Henry County, IA, Howard County, IA, Iowa County, IA, Jackson County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Lee County, IA, Linn County, IA, Louisa County, IA, Lucas County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Monroe County, IA, Muscatine County, IA, Poweshiek County, IA, Scott County, IA, Tama County, IA, Van Buren County, IA, Wapello County, IA, Washington County, IA, Wayne County, IA, Winneshiek County, IA, Hancock County, IL, Henderson County, IL, Jo Daviess County, IL, Mercer County, IL, Rock Island County, IL, Warren County, IL, Adair County, MO, Clark County, MO, Knox County, MO, Lewis County, MO, Mercer County, MO, Putnam County, MO, Schuyler County, MO, Scotland County, MO, Sullivan County, MO, Crawford County, WI, Grant County, WI
The radar
The Quad Cities radar (KDVN), 107 km from the middle of the area, began a volume at 16:21 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
Davenport, (KDVN), launched 12:00Z, 4.3 hours before the alert went out and 114 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
- 210 J/kg
- Mixed-layer CIN
- -154 J/kg
- Mixed-layer LCL
- 1176 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
150
ACUS11 KWNS 221620
SWOMCD
SPC MCD 221619 COR
ILZ000-WIZ000-IAZ000-MNZ000-MOZ000-221800-
MESOSCALE DISCUSSION 1113
NWS STORM PREDICTION CENTER NORMAN OK
1119 AM CDT SUN JUN 22 2014
AREAS AFFECTED...PORTIONS OF CENTRAL/ERN IA...SWRN WI...NWRN
IL...NERN MO
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 221619Z - 221800Z
CORRECTED FOR RACINE MN
PROBABILITY OF WATCH ISSUANCE...60 PERCENT
SUMMARY...THUNDERSTORMS ARE EXPECTED TO INCREASE IN COVERAGE AND
INTENSITY INTO THE EARLY AFTERNOON WITH A RISK FOR DAMAGING WINDS
AND ISOLATED LARGE HAIL. TRENDS ARE BEING MONITORED AND A WW MAY BE
NEEDED IN THE 17-18Z TIME FRAME.
DISCUSSION...TSTMS CONTINUE TO BECOME SOMEWHAT BETTER ORGANIZED
ALONG A LINE FROM JUST SOUTH OF RACINE MN TO GRINNELL IA WITH A MORE
LINEAR STRUCTURE...TIGHTENING LEADING EDGE REFLECTIVITY GRADIENT AND
OCCASIONALLY SMALL BOWING SEGMENTS. THESE STORMS MAY CURRENTLY BE
SLIGHTLY ELEVATED...HOWEVER CONTINUED DESTABILIZATION IN ADVANCE OF
THE LINE AND TRAILING COLD POOL WILL RESULT IN STRONG/SEVERE
SURFACE-BASED TSTMS OVER THE NEXT FEW HOURS. WITH TIME...THE LINE
MAY DEVELOP TO THE SOUTH ALONG A CONVECTIVELY INDUCED OUTFLOW
BOUNDARY ACROSS NERN MO. RECENT VWP DATA FROM KDMX SAMPLED 30 TO 40
KT MID-LEVEL FLOW...LIKELY ENHANCED BY CONVECTIVELY INDUCED MCV OVER
NRN IA. MLCAPE SHOULD AVERAGE 2000 TO 2500 J/KG BY EARLY AFTERNOON
AND BE SUPPORTIVE OF SVR TSTMS WITH PRIMARILY A THREAT FOR DAMAGING
WINDS. ISOLATED LARGE HAIL WILL ALSO BE POSSIBLE.
CONVECTIVE TRENDS WILL CONTINUE TO BE MONITORED FOR A WW IN THE
17-18Z TIME FRAME. IN ADDITION...THE UPCOMING 1630Z DAY 1 CONVECTIVE
OUTLOOK WILL EXTEND THE CATEGORICAL SLIGHT RISK EWD INTO FAR SERN
MN...SWRN WI AND NWRN IL.
..BUNTING/WEISS.. 06/22/2014
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...ILX...MKX...LSX...DVN...ARX...DMX...EAX...
LAT...LON 41019336 42299303 42729304 43539257 43689163 43379049
42079003 41609011 41129039 40639065 40369077 39989138
39949210 39989310 40219369 41019336SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 22, 11:54 AM CDT | Severe Thunderstorm Watch | SPC | Carroll, Hancock, Henderson, Henry, Jo Daviess, McDonough and 4 more | 7 hr |
| Jun 22, 2:30 PM CDT | Mesoscale Discussion | SPC | Carroll, Hancock, Henderson, Henry, Jo Daviess, Knox and 5 more | 60 min |
| Jun 22, 5:58 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Bureau, Cass, Fulton, Hancock and 22 more | 92 min |
| Jun 21, 8:34 PM CDT | Severe Thunderstorm Watch | SPC | Cherokee, Ida, Lyon, O'Brien, Osceola, Plymouth and 2 more | 6 hr |
| Jun 21, 11:57 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Cherokee, Clay, Dickinson, Emmet, Kossuth and 7 more | 93 min |
| Jun 22, 12:24 PM CDT | Mesoscale Discussion | SPC | Decatur, Ringgold, Wayne | 66 min |
Nearby
Mesoscale Discussions in Iowa, 2014Mesoscale Discussions in Missouri, 2014Mesoscale Discussions in Illinois, 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.