Alert archive / Iowa / Mesoscale Discussions in 2014
Mesoscale Discussion 625
The Storm Prediction Center issued this mesoscale discussion at May 20, 2014, 5:49 PM CDT for 5 states. It was in force for 86 min.
The area
The outline as issued.
The facts
- Issued
- May 20, 2014, 5:49 PM CDT (22:49 UTC)
- Expired
- May 20, 2014, 7:15 PM CDT
- In force
- 86 min
- Issued by
- the Storm Prediction Center
All 51 counties
Audubon County, IA, Benton County, IA, Black Hawk County, IA, Boone County, IA, Buchanan County, IA, Cedar County, IA, Clinton County, IA, Dallas County, IA, Delaware County, IA, Dubuque County, IA, Guthrie County, IA, Iowa County, IA, Jackson County, IA, Jasper County, IA, Johnson County, IA, Jones County, IA, Linn County, IA, Marshall County, IA, Polk County, IA, Poweshiek County, IA, Shelby County, IA, Story County, IA, Tama County, IA, Warren County, IA, Boone County, IL, Carroll County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Jo Daviess County, IL, Kane County, IL, Kendall County, IL, Lake County, IL, Lee County, IL, McHenry County, IL, Ogle County, IL, Stephenson County, IL, Whiteside County, IL, Will County, IL, Winnebago County, IL, Lake County, IN, LaPorte County, IN, Porter County, IN, Saint Joseph County, IN, Berrien County, MI, Green County, WI, Kenosha County, WI, Lafayette County, WI, Racine County, WI, Rock County, WI, Walworth County, WI
The radar
The Quad Cities radar (KDVN), 50 km from the middle of the area, began a volume at 22:49 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, 10.8 hours before the alert went out and 55 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
- 203 J/kg
- Mixed-layer CIN
- -354 J/kg
- Mixed-layer LCL
- 1127 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 176 m²/s²
- 0-3 km storm-relative helicity
- 190 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 2:55 PM CDT | Mesoscale Discussion | SPC | Boone, Carroll, Jo Daviess, McHenry, Stephenson, Winnebago | 2 hr |
| May 20, 3:55 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 17 more | 7 hr |
Nearby
Mesoscale Discussions in Iowa, 2014Mesoscale Discussions in Illinois, 2014Mesoscale Discussions in Wisconsin, 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.