Alert archive / Illinois / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 22, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at May 16, 2019, 9:57 PM CDT for Lee County, Illinois. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 16, 2019, 9:57 PM CDT (02:57 UTC)
- Expired
- May 16, 2019, 10:30 PM CDT
- In force
- 33 min
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 50.0 mph
County Lee County, IL
The radar
The Chicago radar (KLOT), 102 km from the middle of the area, began a volume at 03:00 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 16, 7:57 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 3.0 hours before the alert went out and 101 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
- 2335 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 1972 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 64 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.8
What forecasters said that day
The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at May 16, 6:57 PM CDT, 3 hours earlier.
Area forecast discussion, May 16, 6:57 PM CDT, 3 hours before
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</html>Hazardous weather outlook, May 16, 3:40 PM CDT, 6 hours 17 minutes before
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
340 PM CDT Thu May 16 2019
ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
172045-
Winnebago-Boone-McHenry-Lake-Ogle-Lee-De Kalb-Kane-DuPage-Cook-
La Salle-Kendall-Grundy-Will-Kankakee-Livingston-Iroquois-Ford-
Porter-Newton-Jasper-Benton-
340 PM CDT Thu May 16 2019 /440 PM EDT Thu May 16 2019/
This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Elevated hail risk...up to quarter size.
Elevated damaging wind risk...up to 60 mph.
Limited Flooding Risk.
Limited Fog Risk.
DISCUSSION...
A conditional severe thunderstorm threat remains for mid to late evening
and into the early overnight hours. The atmosphere is stable in wake
of earlier storms, but should quickly recover again tonight. Initial storms
would be capable of strong winds and large hail. The threat may shift
to very heavy rainfall and localized flooding potential overnight.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday and Saturday...
Limited Severe Thunderstorm Risk.
Limited Flooding Risk.
Sunday...
Limited Severe Thunderstorm Risk.
Monday...
Limited Thunderstorm Risk.
Tuesday...
Elevated Thunderstorm Risk.
Wednesday...
Limited Thunderstorm Risk.
DISCUSSION:
Thunderstorms should be ongoing Friday morning, with the axis of
the strongest, and potentially severe, storms should be roughly
along and north of the I-80 corridor. The area of thunderstorms should
lift north through the day and into southern Wisconsin Friday evening.
Training thunderstorms may produce areas of heavy rainfall, with
flooding possible. Some storms may be strong to severe, producing
large hail and damaging winds.
Periods of thunderstorms are expected through the weekend and into
next week. There may be additional periodic chances for severe
thunderstorms, with the greatest chances on Sunday and then Tuesday
into Tuesday night.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed late this evening.
GENERAL STORM MOTION OF THE DAY:
Moving toward the southeast at 40 mph.
LMZ740>745-172045-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
340 PM CDT Thu May 16 2019
This Hazardous Weather Outlook is for portions of the Illinois
nearshore waters of Lake Michigan and the Indiana nearshore
waters of Lake Michigan.
.DAY ONE...Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Elevated hail risk...up to quarter size.
Elevated thunderstorm wind gust risk...up to 40 knots.
Elevated Fog Risk.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday...
Limited Severe Thunderstorm Risk.
Saturday...
Limited Thunderstorm Risk.
Sunday...
Hazardous conditions for small craft are likely.
Elevated Thunderstorm Risk.
Tuesday and Wednesday...
Hazardous conditions for small craft are likely.
Limited Thunderstorm Risk.
KMD
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Local storm report, May 16, 4:20 PM CDT, 5 hours 37 minutes before
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</html>Local storm report, May 16, 7:24 PM CDT, 2 hours 33 minutes before
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</html>Local storm report, May 16, 8:08 PM CDT, 1 hour 49 minutes before
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</html>Local storm report, May 16, 9:35 PM CDT, 22 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
935 PM CDT THU MAY 16 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0923 PM HAIL FRANKLIN GROVE 41.84N 89.30W
05/16/2019 M1.50 INCH LEE IL PUBLIC
&&Local storm report, May 16, 9:46 PM CDT, 11 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
946 PM CDT THU MAY 16 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0929 PM HAIL 1 SSE ASHTON 41.86N 89.22W
05/16/2019 M1.75 INCH LEE IL PUBLIC
I-88 NEAR ASHTON.
&&
MBLocal storm report, May 16, 9:49 PM CDT, 8 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
949 PM CDT THU MAY 16 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0948 PM HAIL 1 S STEWARD 41.83N 89.02W
05/16/2019 M1.00 INCH LEE IL TRAINED SPOTTER
&&The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 8:13 PM CDT | River Flood Advisory | LOT | Kankakee | 3 days |
| May 16, 8:59 PM CDT | Severe Thunderstorm Warning | LOT | Lee | 46 min |
| May 16, 9:35 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Lee | 40 min |
| May 16, 9:39 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Kane, Kendall | 36 min |
| May 16, 10:04 PM CDT | Special Weather Statement | LOT | Kendall | 26 min |
| May 16, 10:15 PM CDT | Special Weather Statement | LOT | Kendall | 15 min |
| May 16, 10:33 PM CDT | Flash Flood Warning | LOT | Lee | 3 hr |
| May 16, 10:35 PM CDT | Special Weather Statement | LOT | Cook | 25 min |
| May 16, 10:54 PM CDT | Severe Thunderstorm Warning | LOT | Cook | 36 min |
| May 16, 11:02 PM CDT | Severe Thunderstorm Warning | LOT | Lee | 43 min |
| May 16, 11:14 PM CDT | Flash Flood Warning | LOT | Lee | 4 hr |
| May 16, 11:17 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Lee | 43 min |
| May 16, 11:31 PM CDT | Special Weather Statement | LOT | DuPage | 14 min |
| May 16, 11:44 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, DuPage, Kane, Kendall, Will | 61 min |
| May 16, 11:51 PM CDT | Severe Thunderstorm Warning | LOT | Cook | 23 min |
| May 16, 11:53 PM CDT | Special Marine Warning | LOT | 97 min | |
| May 17, 12:27 AM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage | 50 min |
| May 17, 12:42 AM CDT | Severe Thunderstorm Warning | LOT | Lee | 36 min |
| May 17, 12:45 AM CDT | Special Marine Warning | LOT | 2 hr | |
| May 17, 3:51 AM CDT | Small Craft Advisory | LOT | 18 hr | |
| May 17, 9:22 AM CDT | River Flood Advisory | LOT | Kane, Kendall | 31 hr |
| May 16, 8:13 PM CDT | River Flood Advisory | LOT | Newton | 5 days |
| May 16, 11:20 PM CDT | Severe Thunderstorm Warning | LOT | Lake, Porter | 40 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2019Every severe thunderstorm warning in 2019
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.