Alert archive / Illinois / Tornado Warnings in 2017
Tornado Warning 35, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at May 17, 2017, 7:00 PM CDT for Des Moines County, Iowa; Henderson County, Mercer County, Warren County, Illinois. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 17, 2017, 7:00 PM CDT (00:00 UTC)
- Expired
- May 17, 2017, 7:45 PM CDT
- In force
- 45 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.5 in
Counties Des Moines County, IA, Henderson County, IL, Mercer County, IL, Warren County, IL
The radar
The Quad Cities radar (KDVN), 98 km from the middle of the area, began a volume at 00:01 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 17, 3:44 PM CDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 0.0 hours before the alert went out and 102 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
- 1161 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 1502 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 211 m²/s²
- 0-3 km storm-relative helicity
- 306 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 7.2
The text
As transmitted.
167
WFUS53 KDVN 180000
TORDVN
ILC071-131-187-IAC057-180045-
/O.NEW.KDVN.TO.W.0035.170518T0000Z-170518T0045Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
700 PM CDT WED MAY 17 2017
The National Weather Service in the Quad Cities has issued a
* Tornado Warning for...
Henderson County in west central Illinois...
Northern Warren County in west central Illinois...
Southwestern Mercer County in northwestern Illinois...
Eastern Des Moines County in southeastern Iowa...
* Until 745 PM CDT
* At 659 PM CDT, a severe thunderstorm capable of producing a
tornado was located near Carman, or near Burlington, moving
northeast at 50 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...
Gulf Port around 705 PM CDT.
Biggsville and Gladstone around 715 PM CDT.
Oquawka and Rozetta around 720 PM CDT.
Keithsburg and Little York around 730 PM CDT.
Seaton around 735 PM CDT.
Other locations impacted by this tornadic thunderstorm include Lomax,
Gerlaw, Welter Recreation Area, Shokokon, Spring Grove, Kingston,
Monmouth Municipal Airport, Ogle, Eleanor and Decorra.
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 4064 9107 4066 9113 4068 9112 4070 9112
4070 9114 4072 9116 4072 9118 4071 9118
4072 9120 4071 9121 4075 9125 4075 9128
4107 9103 4107 9095 4110 9095 4114 9098
4117 9096 4100 9046 4063 9102
TIME...MOT...LOC 2359Z 212DEG 48KT 4074 9112
TORNADO...RADAR INDICATED
HAIL...1.50IN
$$
123 follow-up statements
968
WWUS53 KDVN 180020
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
720 PM CDT WED MAY 17 2017
ILC071-131-187-IAC057-180045-
/O.CON.KDVN.TO.W.0035.000000T0000Z-170518T0045Z/
Henderson IL-Warren IL-Mercer IL-Des Moines IA-
720 PM CDT WED MAY 17 2017
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR
HENDERSON...NORTHERN WARREN...SOUTHWESTERN MERCER AND EASTERN DES
MOINES COUNTIES...
At 718 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Rozetta, or over Oquawka, moving northeast at 45
mph. Another strong storm was located just west of Lone Tree.
HAZARD...Tornado and ping pong ball size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Little York around 725 PM CDT.
Seaton around 730 PM CDT.
Other locations impacted by this tornadic thunderstorm include Lone
Tree, Carthage Lake, Gerlaw, 4th Pumping Station Campground,
Shokokon, Media, Spring Grove, Heapsville, Kingston and Monmouth
Municipal Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4067 9103 4070 9110 4074 9117 4079 9123
4107 9103 4107 9095 4110 9095 4114 9098
4117 9096 4100 9046 4065 9099
TIME...MOT...LOC 0018Z 213DEG 48KT 4095 9090
TORNADO...RADAR INDICATED
HAIL...1.50IN
$$
12199
WWUS53 KDVN 180033
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
733 PM CDT WED MAY 17 2017
ILC071-131-187-IAC057-180045-
/O.CON.KDVN.TO.W.0035.000000T0000Z-170518T0045Z/
Henderson IL-Warren IL-Mercer IL-Des Moines IA-
733 PM CDT WED MAY 17 2017
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR
NORTHEASTERN HENDERSON...NORTHERN WARREN...SOUTHWESTERN MERCER AND
NORTHEASTERN DES MOINES COUNTIES...
At 732 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Seaton, or near Aledo, moving northeast at 50 mph.
HAZARD...Tornado and half dollar 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 Henderson...northern Warren...southwestern Mercer and
northeastern Des Moines Counties, including the following locations:
Gerlaw, 4th Pumping Station Campground, Ogle, Delabar State Park,
Eleanor, Bald Bluff, Kingston, Monmouth Municipal Airport and Big
River State Forest.
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 4088 9096 4098 9108 4107 9103 4107 9095
4110 9095 4114 9098 4117 9096 4100 9046
4080 9078
TIME...MOT...LOC 0032Z 212DEG 48KT 4112 9076
TORNADO...RADAR INDICATED
HAIL...1.25IN
$$
12321
WWUS53 KDVN 180044
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
744 PM CDT WED MAY 17 2017
IAC057-ILC071-131-187-180054-
/O.EXP.KDVN.TO.W.0035.000000T0000Z-170518T0045Z/
Henderson IL-Warren IL-Mercer IL-Des Moines IA-
744 PM CDT WED MAY 17 2017
...THE TORNADO WARNING FOR NORTHEASTERN HENDERSON...NORTHERN
WARREN...SOUTHWESTERN MERCER AND NORTHEASTERN DES MOINES COUNTIES
WILL EXPIRE AT 745 PM CDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
A tornado watch remains in effect until 1100 PM CDT for northwestern
and west central Illinois...and southeastern Iowa.
LAT...LON 4088 9096 4098 9108 4107 9103 4107 9095
4110 9095 4114 9098 4117 9096 4100 9046
4080 9078
TIME...MOT...LOC 0044Z 212DEG 48KT 4123 9067
$$
12The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 17, 7:14 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Dubuque, Jackson, Jones, Muscatine and 1 more | 61 min |
| May 17, 7:30 PM CDT | Severe Thunderstorm Warning | DVN | Louisa, Muscatine, Scott | 45 min |
| May 17, 7:37 PM CDT | Severe Thunderstorm Warning | DVN | Scott | 38 min |
| May 17, 7:44 PM CDT | Tornado Warning | DVN | Clinton, Scott | 46 min |
| May 17, 8:05 PM CDT | Severe Thunderstorm Warning | DVN | Clinton, Jackson | 55 min |
| May 17, 8:08 PM CDT | Severe Thunderstorm Warning | DVN | Muscatine, Scott | 67 min |
| May 17, 8:05 PM CDT | Tornado Warning | DVN | Henry, Mercer, Rock Island | 40 min |
| May 17, 8:46 PM CDT | Tornado Warning | DVN | Bureau, Henry, Whiteside | 23 min |
| May 17, 9:00 PM CDT | Severe Thunderstorm Warning | DVN | Carroll, Jo Daviess, Rock Island, Stephenson, Whiteside | 60 min |
| May 17, 9:38 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Henry | 52 min |
Nearby
Tornado Warnings in Illinois, 2017Tornado Warnings in Iowa, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.