Alert archive / Illinois / Tornado Warnings in 2026
Tornado Warning 36, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Apr 17, 2026, 4:09 PM CDT for Stephenson County, Illinois. It was in force for 39 min. 13 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Apr 17, 2026, 4:09 PM CDT (21:09 UTC)
- Expired
- Apr 17, 2026, 4:48 PM CDT
- In force
- 39 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.5 in
County Stephenson County, IL
The radar
The Milwaukee radar (KMKX), 102 km from the middle of the area, began a volume at 21:12 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 17, 4:18 PM CDT | HAIL 1.75 | 2 E Rock Grove, IL | Report from mPING: Golf Ball (1.75 in.). |
| Apr 17, 4:18 PM CDT | HAIL 1.75 | 2 E Rock Grove, IL | Report from mPING: Golf Ball (1.75 in.). |
| Apr 17, 4:24 PM CDT | HAIL 1.75 | 1 N Dakota, IL | |
| Apr 17, 4:24 PM CDT | HAIL 1.75 | 1 N Dakota, IL | |
| Apr 17, 4:24 PM CDT | HAIL 3 | 2 W Dakota, IL | Report from mPING: Tea Cup (3.00 in.). |
| Apr 17, 4:24 PM CDT | HAIL 3 | 2 W Dakota, IL | Report from mPING: Tea Cup (3.00 in.). |
| Apr 17, 4:25 PM CDT | HAIL 1 | 3 Sw Winneshiek, IL | Report from mPING: Quarter (1.00 in.). |
| Apr 17, 4:25 PM CDT | HAIL 1 | 3 Sw Winneshiek, IL | Report from mPING: Quarter (1.00 in.). |
| Apr 17, 4:26 PM CDT | HAIL 1 | Winneshiek, IL | Report from mPING: Quarter (1.00 in.). |
| Apr 17, 4:29 PM CDT | HAIL 1.75 | Winneshiek, IL | Report from mPING: Golf Ball (1.75 in.). |
| Apr 17, 4:29 PM CDT | HAIL 1.75 | Winneshiek, IL | Report from mPING: Golf Ball (1.75 in.). |
| Apr 17, 4:45 PM CDT | HAIL 2.75 | Dakota, IL | report from LOT on Dakota storm.. they received a photo of baseball size hail.. |
| Apr 17, 4:45 PM CDT | HAIL 2.75 | Dakota, IL | report from LOT on Dakota storm.. they received a photo of baseball size hail.. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this tornado warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 17, 12:40 PM CDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 9.2 hours before the alert went out and 263 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
- 84 J/kg
- Mixed-layer CIN
- -150 J/kg
- Mixed-layer LCL
- 1053 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 164 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
716
WFUS53 KDVN 172109
TORDVN
ILC177-172200-
/O.NEW.KDVN.TO.W.0036.260417T2109Z-260417T2200Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
409 PM CDT Fri Apr 17 2026
The National Weather Service in the Quad Cities has issued a
* Tornado Warning for...
Northeastern Stephenson County in northwestern Illinois...
* Until 500 PM CDT.
* At 409 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Cedarville, or near Freeport, moving east at 25
mph.
HAZARD...Tornado and ping pong ball size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This dangerous storm will be near...
Davis, Dakota, Rock City, Ridott, Rock Grove, Afolkey, Dakota
Dornink Airport, and Winneshiek around 415 PM CDT.
Lake Summerset around 420 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
This storm has a history of producing tornadoes. For your safety,
seek shelter now!
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4250 8940 4227 8940 4227 8975 4250 8978
TIME...MOT...LOC 2109Z 260DEG 24KT 4236 8961
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
$$
McClure6 follow-up statements
499
WWUS53 KDVN 172118
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
418 PM CDT Fri Apr 17 2026
ILC177-172200-
/O.CON.KDVN.TO.W.0036.000000T0000Z-260417T2200Z/
Stephenson IL-
418 PM CDT Fri Apr 17 2026
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM CDT FOR
NORTHEASTERN STEPHENSON COUNTY...
At 418 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Winneshiek, or near Freeport, moving east at 25 mph.
HAZARD...Tornado and ping pong ball size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Davis, Dakota, Rock City, Ridott, Afolkey, Dakota Dornink Airport,
and Winneshiek around 425 PM CDT.
Other locations in the path of this tornadic thunderstorm include
Lake Summerset.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
This storm has a history of producing tornadoes. Seek shelter now!
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4250 8940 4227 8940 4227 8975 4250 8977
TIME...MOT...LOC 2118Z 249DEG 21KT 4232 8958
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
$$
McClure254
WWUS53 KDVN 172124 RRA
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
424 PM CDT Fri Apr 17 2026
ILC177-172200-
/O.CON.KDVN.TO.W.0036.000000T0000Z-260417T2200Z/
Stephenson IL-
424 PM CDT Fri Apr 17 2026
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM CDT FOR
NORTHEASTERN STEPHENSON COUNTY...
At 424 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Winneshiek, or 7 miles northeast of Freeport, moving
east at 30 mph.
HAZARD...Tornado and ping pong ball size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Davis, Rock City, Rock Grove, and Lake Summerset around 430 PM
CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4250 8940 4227 8940 4227 8962 4250 8963
TIME...MOT...LOC 2124Z 249DEG 25KT 4235 8952
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
$$
McClure092
WWUS53 KDVN 172130 RRA
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
430 PM CDT Fri Apr 17 2026
ILC177-172200-
/O.CON.KDVN.TO.W.0036.000000T0000Z-260417T2200Z/
Stephenson IL-
430 PM CDT Fri Apr 17 2026
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM CDT FOR
NORTHEASTERN STEPHENSON COUNTY...
At 430 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Rock City, or 10 miles northeast of Freeport, moving
east at 30 mph.
HAZARD...Tornado and ping pong ball size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Davis and Lake Summerset around 435 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4250 8940 4227 8940 4227 8958 4250 8958
TIME...MOT...LOC 2130Z 255DEG 28KT 4235 8945
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
$$
McClure466
WWUS53 KDVN 172137 RRA
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
437 PM CDT Fri Apr 17 2026
ILC177-172200-
/O.CON.KDVN.TO.W.0036.000000T0000Z-260417T2200Z/
Stephenson IL-
437 PM CDT Fri Apr 17 2026
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM CDT FOR
NORTHEASTERN STEPHENSON COUNTY...
At 437 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Pecatonica, or 13 miles east of Freeport, moving
east at 30 mph.
HAZARD...Tornado and ping pong ball size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornadic thunderstorm will remain over mainly rural areas of
northeastern Stephenson County, including the following locations...
Lake Summerset.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4250 8940 4227 8940 4233 8947 4250 8952
TIME...MOT...LOC 2137Z 260DEG 24KT 4236 8938
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
$$
McClure436
WWUS53 KDVN 172141
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
441 PM CDT Fri Apr 17 2026
ILC177-172200-
/O.CON.KDVN.TO.W.0036.000000T0000Z-260417T2200Z/
Stephenson IL-
441 PM CDT Fri Apr 17 2026
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM CDT FOR
NORTHEASTERN STEPHENSON COUNTY...
At 440 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Lake Summerset, or 11 miles south of Brodhead,
moving northeast at 30 mph.
HAZARD...Tornado and ping pong ball size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Davis and Lake Summerset.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4234 8940 4236 8944 4250 8945 4250 8940
TIME...MOT...LOC 2140Z 226DEG 25KT 4245 8940
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
$$
McClure285 WWUS53 KDVN 172148 SVSDVN Severe Weather Statement National Weather Service Quad Cities IA/IL 448 PM CDT Fri Apr 17 2026 ILC177-172158- /O.CAN.KDVN.TO.W.0036.000000T0000Z-260417T2200Z/ Stephenson IL- 448 PM CDT Fri Apr 17 2026 ...THE TORNADO WARNING FOR NORTHEASTERN STEPHENSON COUNTY IS CANCELLED... The storm which prompted the warning has moved out of the area. Therefore, the warning has been cancelled. A Tornado Watch remains in effect until 800 PM CDT for northwestern Illinois. To report severe weather, contact your nearest law enforcement agency. They will relay your report to the National Weather Service the Quad Cities. && LAT...LON 4234 8940 4236 8944 4250 8945 4250 8940 TIME...MOT...LOC 2146Z 260DEG 24KT 4246 8933 $$ McClure
What forecasters said that day
The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Quad Cities, IA wrote its last area forecast discussion before this tornado warning went out at Apr 17, 1:11 PM CDT, 2 hours 58 minutes earlier. Its key messages:
- A strong storm system will bring the threat for severe storms once again to our area through this evening. SPC continues to highlight nearly our entire area in an Enhanced Risk (level 3 of 5) for severe weather.
- A flood watch has been issued for much of the area through tonight for the potential of excessive rainfall with the final round of storms this afternoon/tonight. Soils across the area are saturated north of I-80 and very moist south of I-80.
- Much cooler conditions are expected this weekend. Unseasonably cool temperatures in the 30s Saturday night and Sunday night will bring the potential for frost/freeze, especially in our north.
- Area rivers are on the rise from the recent rounds of heavy rain, and heavy rainfall later today may push them even higher. Refer to the hydro section below for more details.
Area forecast discussion, Apr 17, 1:11 PM CDT, 2 hours 58 minutes before
Area Forecast Discussion
National Weather Service Quad Cities IA IL
111 PM CDT Fri Apr 17 2026
.KEY MESSAGES...
- A strong storm system will bring the threat for severe storms
once again to our area through this evening. SPC continues to
highlight nearly our entire area in an Enhanced Risk (level 3
of 5) for severe weather.
- A flood watch has been issued for much of the area through
tonight for the potential of excessive rainfall with the final
round of storms this afternoon/tonight. Soils across the area
are saturated north of I-80 and very moist south of I-80.
- Much cooler conditions are expected this weekend. Unseasonably cool
temperatures in the 30s Saturday night and Sunday night will
bring the potential for frost/freeze, especially in our north.
- Area rivers are on the rise from the recent rounds of heavy
rain, and heavy rainfall later today may push them even
higher. Refer to the hydro section below for more details.
&&
.SHORT TERM /THROUGH TONIGHT/...
Issued at 1252 PM CDT Fri Apr 17 2026
Convective initiation has occurred across eastern Iowa. The
individual discrete cells will rapidly grow upscale into one or
more broken lines ahead of the cold front.
The atmosphere is becoming increasingly moist so the storms will
have plenty of fuel to produce heavy rainfall. The axis for the
heavier rain is somewhat narrow but rainfall amounts of an inch
in an hour will be possible with the stronger storms. Where
storms linger or repeat over the same areas, rainfall amounts
of 2 to 3 inches in a short time will be possible.
The pre-frontal line(s) of storms look to push east of the
Mississippi in the 6-8 PM time frame with the cold front
arriving during the mid to late evening hours. Very short range
models which had been pointing to a solid line of storms with
the front are now trending toward a scattered to broken line
with not much thunder associated with it. This 'may' be an
indication the convective allowing models are struggling with
the overall forcing from the upper level system.
The bulk of the rain looks to end across the area by midnight
but scattered rain showers along and immediately behind the
front will linger past midnight. However, the overall trend will
be decreasing areal coverage from west to east after midnight.
&&
.LONG TERM /SATURDAY THROUGH THURSDAY/...
Issued at 306 AM CDT Fri Apr 17 2026
Much colder air will continue to move into the area for the weekend
as a northwest flow pattern develops aloft. An area of high pressure
will build into the area Saturday night, which could set up our
first bout of frost/freeze conditions during the growing season.
There does appear to be a mid-level trough sweeping through the area
Saturday night, which could result in some cloud cover that could
keep our temperatures from falling too much, limiting our
frost/freeze potential. Despite this, the NBM probabilities of
freezing temperatures Saturday night are still around 50-80% along
and north of Interstate 80. Another night of frost/freeze conditions
are possible Sunday night as well, with similar exceedance
probabilities for freezing temperatures.
A quieter weather pattern will persist into early next week as a
broad upper ridge remains in place through the central US. A larger
trough begins to take shape across the western US into the latter
portion of the week. Therefore, some warming and a move toward some
smaller precipitation chances (20-40%) start to return to the area
by Thursday with a larger storm system potentially nearing the
region for Friday.
&&
.AVIATION /18Z TAFS THROUGH 18Z SATURDAY/...
Issued at 1225 PM CDT Fri Apr 17 2026
Convective initiation has begun over eastern Iowa with surface
winds gusting to 30 knots. Very short range models indicate
rapid upscale growth of TSRA through 00z/18. Discrete TSRA cells
will grow upscale into a line that congeals along the
Mississippi River by 00z/18. Based on forecast soundings,
probability is high for wind gusts over 50 knots with the
discrete cells and as the line forms. By 06z/18 the cold front
will have swept through the area with widespread MVFR conditions
and winds gusting up to 25 knots.
&&
.HYDROLOGY...
Issued at 1136 AM CDT Thu Apr 16 2026
Discussion...
Over the past five days, multiple rounds of heavy rain have
impacted eastern Iowa, northern Illinois and southern Wisconsin.
Rainfall amounts have run from 2 to 5 inches of rain; much of
this rain has been north of Highway 30.
Another round of heavy rain is forecast this afternoon and
evening with amounts running from a half inch to around 1.5
inches. With area soils running from moist to near saturation,
this additional rainfall will quickly run off into area
waterways resulting in new or increased river flooding along
with the potential for flash flooding.
Much of this rain is forecast to fall across southeast Iowa,
west central Illinois and into northern Illinois. River basins
impacted would be the Rock, lower Iowa, Skunk, Des Moines and La
Moine.
Rock River...
Based on overall river forecasts and another round of heavy rain
expected today, confidence is high (>80%) that the entire
length of the Rock River will reach flood stage by the weekend
and remain above flood stage into much of next week.
Mississippi River...
Routed flow coming down from the upper Mississippi, Wisconsin,
Rock, Iowa and other tributary rivers will cause general rises
along the length of the Mississippi. Based on the current routed
flow and another round of heavy rain, confidence is high (>80%)
that the Mississippi will reach flood stage from Muscatine down
through Keithsburg and at Gregory Landing. Gladstone and
Burlington are already above flood stage and will see additional
rises as the additional routed flow arrives over the weekend
and into next week.
Iowa Tributary Rivers...
Rivers in eastern Iowa are running high from the rounds of heavy
rain. Flood warnings continue for the lower Wapsipinicon River
near DeWitt and the Iowa River above Coralville near Marengo.
Based on routed flow, the lower Cedar River near Conesville will
go above flood stage over the weekend.
The North Skunk River near Sigourney is forecast to go above
flood stage tonight with general rises expected farther
downstream and on the Skunk River.
&&
.DVN WATCHES/WARNINGS/ADVISORIES...
IA...Flood Watch through late tonight for IAZ040>042-052>054-
064>068-077-078-088-089-099.
IL...Flood Watch through late tonight for ILZ001-002-007-009-
015>018-024>026-034-035.
MO...Flood Watch through late tonight for MOZ010.
&&
SHORT TERM...08
LONG TERM...Schultz
AVIATION...08
HYDROLOGY...08Hazardous weather outlook, Apr 17, 3:23 AM CDT, 12 hours 46 minutes before
Hazardous Weather Outlook National Weather Service Quad Cities IA IL 323 AM CDT Fri Apr 17 2026 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-180900- Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson- Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson- Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll- Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson- Warren-Hancock-McDonough-Scotland-Clark- 323 AM CDT Fri Apr 17 2026 This Hazardous Weather Outlook is for portions of north central Illinois...northwest Illinois...west central Illinois...east central Iowa...northeast Iowa...southeast Iowa and northeast Missouri. .DAY ONE...TODAY AND TONIGHT An Enhanced Risk (Level 3 of 5) for severe weather remains in place across the area for this afternoon and evening. Damaging winds and tornadoes, some possibly strong, are the primary threats. Localized flash flooding is also possible. Southerly winds will gust to around 40 mph this afternoon prior to the severe thunderstorm development. Area rivers are experiencing flooding. Please see the latest Flood Statements and Flood Warnings for details. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY Much colder air will bring the potential for frost and freeze conditions to parts of the area Saturday night and Sunday night. .SPOTTER INFORMATION STATEMENT... Spotter activation is likely for this afternoon and evening. JTS
In the hours before
Local storm report, Apr 17, 3:39 PM CDT, 30 minutes before
Preliminary Local Storm Report
National Weather Service Quad Cities IA IL
339 PM CDT Fri Apr 17 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0336 PM Hail 2 E Hiawatha 42.05N 91.65W
04/17/2026 M1.00 Inch Linn IA Public
Report from mPING: Quarter (1.00 in.).
&&Local storm report, Apr 17, 3:51 PM CDT, 18 minutes before
Preliminary Local Storm Report
National Weather Service Quad Cities IA IL
351 PM CDT Fri Apr 17 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0349 PM Tstm Wnd Dmg 4 NNE Stockton 42.40N 89.99W
04/17/2026 Jo Daviess IL Trained Spotter
3Ft tree down at the base.
&&
MJLLocal storm report, Apr 17, 3:58 PM CDT, 11 minutes before
Preliminary Local Storm Report
National Weather Service Quad Cities IA IL
358 PM CDT Fri Apr 17 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0350 PM Hail 1 S Nora 42.44N 89.94W
04/17/2026 M1.00 Inch Jo Daviess IL Trained Spotter
Time estimated by radar.
&&
CMDLocal storm report, Apr 17, 4:00 PM CDT, 9 minutes before
Preliminary Local Storm Report
National Weather Service Quad Cities IA IL
400 PM CDT Fri Apr 17 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0353 PM Hail Hiawatha 42.05N 91.68W
04/17/2026 M1.00 Inch Linn IA Fire Dept/Rescue
Relayed by county EM.
&&Local storm report, Apr 17, 4:01 PM CDT, 8 minutes before
Preliminary Local Storm Report
National Weather Service Quad Cities IA IL
401 PM CDT Fri Apr 17 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0353 PM Hail Robins 42.08N 91.67W
04/17/2026 E1.00 Inch Linn IA Fire Dept/Rescue
Relayed via county EM.
&&Local storm report, Apr 17, 4:07 PM CDT, 2 minutes before
Preliminary Local Storm Report
National Weather Service Quad Cities IA IL
407 PM CDT Fri Apr 17 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0403 PM Tstm Wnd Gst Walker 42.29N 91.78W
04/17/2026 E60 MPH Linn IA Fire Dept/Rescue
Relayed via county EM. Also pea sized hail.
&&The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 17, 10:15 AM CDT | River Flood Warning | DVN | Stephenson | 6 days |
| Apr 17, 11:21 AM CDT | River Flood Warning | DVN | Rock Island | 10 days |
| Apr 17, 11:21 AM CDT | River Flood Warning | DVN | Rock Island | 21 days |
| Apr 17, 12:46 PM CDT | Flood Watch | DVN | Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more | 12 hr |
| Apr 17, 1:10 PM CDT | Severe Thunderstorm Warning | DVN | Jo Daviess | 65 min |
| Apr 17, 2:11 PM CDT | Tornado Warning | DVN | Jo Daviess | 49 min |
| Apr 17, 2:23 PM CDT | Flash Flood Warning | DVN | Jo Daviess | 6 hr |
| Apr 17, 2:48 PM CDT | Tornado Warning | DVN | Jo Daviess, Stephenson | 42 min |
| Apr 17, 3:25 PM CDT | Severe Thunderstorm Warning | DVN | Jo Daviess | 35 min |
| Apr 17, 3:27 PM CDT | Tornado Warning | DVN | Carroll, Jo Daviess, Stephenson | 48 min |
| Apr 17, 4:23 PM CDT | Severe Thunderstorm Warning | DVN | Hancock | 54 min |
| Apr 17, 5:02 PM CDT | Severe Thunderstorm Warning | DVN | Stephenson | 8 min |
| Apr 17, 5:27 PM CDT | Severe Thunderstorm Warning | DVN | Henderson | 63 min |
| Apr 17, 5:30 PM CDT | Severe Thunderstorm Warning | DVN | Carroll, Jo Daviess, Stephenson | 75 min |
| Apr 17, 5:46 PM CDT | Tornado Warning | DVN | Henderson, Mercer, Warren | 24 min |
| Apr 17, 5:47 PM CDT | Tornado Warning | DVN | Hancock | 43 min |
| Apr 17, 5:51 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Mercer, Rock Island | 54 min |
| Apr 17, 6:00 PM CDT | Severe Thunderstorm Warning | DVN | Hancock, Henderson, McDonough, Mercer, Rock Island, Warren | 60 min |
| Apr 17, 6:06 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Rock Island, Whiteside | 42 min |
| Apr 17, 6:14 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Henry | 76 min |
| Apr 17, 6:25 PM CDT | Tornado Warning | DVN | Hancock | 65 min |
| Apr 17, 6:31 PM CDT | Severe Thunderstorm Warning | DVN | Hancock, McDonough | 59 min |
| Apr 17, 6:37 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Carroll, Henry, Rock Island, Whiteside | 68 min |
| Apr 17, 6:42 PM CDT | Severe Thunderstorm Warning | DVN | Carroll, Stephenson | 29 min |
| Apr 17, 6:43 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Henry, Mercer, Rock Island | 62 min |
| Apr 17, 6:57 PM CDT | Severe Thunderstorm Warning | DVN | Hancock, Henderson, McDonough, Warren | 63 min |
Nearby
Tornado Warnings in Illinois, 2026Every tornado warning in 2026Tornadoes in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.