Alert archive / Illinois / Tornado Warnings in 2017
Tornado Warning 52, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Jul 21, 2017, 7:23 PM CDT for Whiteside County, Illinois. It was in force for 22 min. 1 report 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
- Jul 21, 2017, 7:23 PM CDT (00:23 UTC)
- Expired
- Jul 21, 2017, 7:45 PM CDT
- In force
- 22 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
County Whiteside County, IL
The radar
The Quad Cities radar (KDVN), 49 km from the middle of the area, began a volume at 00:27 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 |
|---|---|---|---|
| Jul 21, 7:24 PM CDT | TSTM WND DMG | 2 Ne Fulton, IL | BARN BLOWN DOWN. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 21, 4:52 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 0.4 hours before the alert went out and 228 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
- 2094 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 1572 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 6.5
The text
As transmitted.
269
WFUS53 KDVN 220023
TORDVN
ILC195-220045-
/O.NEW.KDVN.TO.W.0052.170722T0023Z-170722T0045Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
723 PM CDT FRI JUL 21 2017
The National Weather Service in the Quad Cities has issued a
* Tornado Warning for...
Northwestern Whiteside County in northwestern Illinois...
* Until 745 PM CDT
* At 723 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Fulton, or near Clinton, moving east at 40 mph.
HAZARD...Tornado.
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...
Morrison around 735 PM CDT.
Other locations impacted by this tornadic thunderstorm include
Unionville, Morrison-Rockwood State Park and Union Grove.
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.
&&
LAT...LON 4180 8984 4183 9018 4185 9018 4185 9017
4188 9017 4190 9015 4193 9015 4193 9013
TIME...MOT...LOC 0023Z 255DEG 34KT 4189 9012
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
GibbsThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 7:18 PM CDT | Tornado Warning | DVN | Carroll, Whiteside | 42 min |
| Jul 21, 7:33 PM CDT | Severe Thunderstorm Warning | DVN | Carroll, Rock Island, Whiteside | 57 min |
| Jul 21, 7:33 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Henry, Mercer, Rock Island | 57 min |
| Jul 21, 7:51 PM CDT | Flash Flood Warning | DVN | Jo Daviess, Stephenson | 6 hr |
| Jul 21, 8:30 PM CDT | Special Weather Statement | DVN | Bureau, Putnam | 45 min |
| Jul 21, 9:06 PM CDT | Flash Flood Warning | DVN | Carroll, Whiteside | 4 hr |
| Jul 21, 11:10 PM CDT | Severe Thunderstorm Warning | DVN | Carroll, Jo Daviess, Stephenson | 65 min |
| Jul 22, 12:37 AM CDT | Flash Flood Warning | DVN | Carroll | 6 hr |
| Jul 22, 1:45 AM CDT | Flash Flood Warning | DVN | Jo Daviess | 6 hr |
| Jul 22, 6:05 AM CDT | Areal Flood Warning | DVN | Carroll, Jo Daviess, Stephenson | 18 hr |
| Jul 22, 12:10 PM CDT | River Flood Warning | DVN | Rock Island | 7 days |
| Jul 22, 12:20 PM CDT | Areal Flood Warning | DVN | Bureau, Henry, Putnam, Rock Island, Whiteside | 12 hr |
| Jul 22, 12:23 PM CDT | River Flood Watch | DVN | Rock Island, Whiteside | 5 days |
| Jul 22, 12:23 PM CDT | River Flood Watch | DVN | Rock Island | 7 days |
| Jul 22, 12:23 PM CDT | River Flood Watch | DVN | Mercer, Rock Island | 8 days |
| Jul 22, 12:23 PM CDT | River Flood Watch | DVN | Mercer | 24 hr |
| Jul 22, 12:23 PM CDT | River Flood Watch | DVN | Henderson, Mercer | 24 hr |
| Jul 22, 12:23 PM CDT | River Flood Watch | DVN | Henderson | 24 hr |
| Jul 22, 12:23 PM CDT | River Flood Watch | DVN | Hancock, Henderson | 24 hr |
| Jul 22, 12:23 PM CDT | River Flood Watch | DVN | Hancock | 3 days |
Nearby
Tornado Warnings in Illinois, 2017Every tornado warning in 2017Tornadoes in 2017
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.