Alert archive / Illinois / Flash Flood Watches in 2015
Flash Flood Watch 2, NWS Chicago, IL
NWS Chicago, IL issued this flash flood watch at Jun 15, 2015, 4:10 AM CDT for 16 counties in Illinois; 5 counties in Indiana. It took effect at Jun 15, 2015, 7:00 AM CDT. It was in force for 21 hr.
The area
The counties it named.
The facts
- Issued
- Jun 15, 2015, 4:10 AM CDT (09:10 UTC)
- In effect from
- Jun 15, 2015, 7:00 AM CDT
- Expired
- Jun 16, 2015, 3:46 AM CDT
- In force
- 21 hr
- Issued by
- NWS Chicago, IL
- Flood severity
- None
All 21 counties
Boone County, IL, DeKalb County, IL, DuPage County, IL, Ford County, IL, Grundy County, IL, Iroquois County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, McHenry County, IL, Ogle County, IL, Winnebago County, IL, Benton County, IN, Jasper County, IN, Lake County, IN, Newton County, IN, Porter County, IN
The radar
The Chicago radar (KLOT), 15 km from the middle of the area, began a volume at 09:10 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
Davenport, (KDVN), launched 00:00Z, 9.2 hours before the alert went out and 190 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
- 180 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 1271 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 74 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Chicago, IL wrote its last area forecast discussion before this flash flood watch went out at Jun 15, 4:08 AM CDT, 2 minutes earlier.
Area forecast discussion, Jun 15, 4:08 AM CDT, 2 minutes before
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</html>Hazardous weather outlook, Jun 14, 3:26 PM CDT, 12 hours 44 minutes before
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Local storm report, Jun 15, 2:29 AM CDT, 1 hour 41 minutes before
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</html>Local storm report, Jun 15, 2:32 AM CDT, 1 hour 38 minutes before
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</html>Local storm report, Jun 15, 2:33 AM CDT, 1 hour 37 minutes before
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</html>The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 14, 7:29 PM CDT | Areal Flood Advisory | LOT | Ford, Livingston | 4 hr |
| Jun 14, 8:40 PM CDT | River Flood Advisory | LOT | Iroquois | 3 days |
| Jun 15, 9:23 AM CDT | River Flood Advisory | LOT | Boone | 58 hr |
| Jun 15, 10:13 AM CDT | River Flood Advisory | LOT | Kane, McHenry | 45 hr |
| Jun 15, 10:13 AM CDT | River Flood Advisory | LOT | Kane, Kendall | 4 days |
| Jun 15, 10:13 AM CDT | River Flood Advisory | LOT | LaSalle | 62 hr |
| Jun 15, 10:32 AM CDT | Flash Flood Warning | LOT | Grundy, LaSalle | 6 hr |
| Jun 15, 10:47 AM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Lee | 26 min |
| Jun 15, 11:00 AM CDT | Flash Flood Warning | LOT | Kankakee, Will | 6 hr |
| Jun 15, 11:51 AM CDT | Special Weather Statement | LOT | DuPage | 24 min |
| Jun 15, 2:29 PM CDT | Areal Flood Advisory | LOT | Ford, Iroquois, Kankakee, Livingston | 2 hr |
| Jun 15, 3:08 PM CDT | Flash Flood Warning | LOT | Iroquois, Kankakee | 6 hr |
| Jun 15, 4:24 PM CDT | Flash Flood Warning | LOT | Cook, DeKalb, DuPage, Kane, Lee, Ogle | 6 hr |
| Jun 15, 4:41 PM CDT | Areal Flood Warning | LOT | Grundy, Kankakee, LaSalle, Will | 18 hr |
| Jun 15, 4:50 PM CDT | Tornado Warning | LOT | Cook | 25 min |
| Jun 15, 5:03 PM CDT | Special Marine Warning | LOT | 57 min | |
| Jun 15, 5:39 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, LaSalle | 21 min |
| Jun 15, 6:09 PM CDT | Flash Flood Warning | LOT | Cook, DeKalb, DuPage, Grundy, Kendall, LaSalle and 2 more | 4 hr |
| Jun 15, 6:28 PM CDT | River Flood Advisory | LOT | Cook | 25 hr |
| Jun 15, 6:32 PM CDT | Special Marine Warning | LOT | 118 min | |
| Jun 15, 11:19 AM CDT | Special Weather Statement | LOT | Lake | 26 min |
| Jun 15, 11:42 AM CDT | Areal Flood Advisory | LOT | Lake, Porter | 2 hr |
| Jun 15, 2:49 PM CDT | Special Weather Statement | LOT | Jasper | 26 min |
Nearby
Flash Flood Watches in Illinois, 2015Flash Flood Watches in Indiana, 2015Every flash flood watch in 2015
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.