Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 9, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Apr 1, 2012, 12:26 AM CDT for Henry County, Mercer County, Rock Island County, Illinois. It was in force for 64 min. 3 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 1, 2012, 12:26 AM CDT (05:26 UTC)
- Expired
- Apr 1, 2012, 1:30 AM CDT
- In force
- 64 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 58.0 mph
Counties Henry County, IL, Mercer County, IL, Rock Island County, IL
The radar
The Quad Cities radar (KDVN), 45 km from the middle of the area, began a volume at 05:26 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 1, 12:40 AM CDT | HAIL 1.5 | 7 N Aledo, IL | TIME ESTIMATED FROM RADAR |
| Apr 1, 12:49 AM CDT | HAIL 0.25 | E Matherville, IL | LOTS OF PEA SIZE HAIL. |
| Apr 1, 1:23 AM CDT | HAIL 0.5 | 1 Sw New Windsor, IL |
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 |
|---|---|---|---|
| Mar 31, 9:24 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 5.4 hours before the alert went out and 46 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1520 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 196 m²/s²
- 0-3 km storm-relative helicity
- 306 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
024
WUUS53 KDVN 010526
SVRDVN
ILC073-131-161-010630-
/O.NEW.KDVN.SV.W.0009.120401T0526Z-120401T0630Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1226 AM CDT SUN APR 1 2012
THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHWESTERN HENRY COUNTY IN NORTHWEST ILLINOIS...
MERCER COUNTY IN NORTHWEST ILLINOIS...
SOUTH CENTRAL ROCK ISLAND COUNTY IN NORTHWEST ILLINOIS...
* UNTIL 130 AM CDT.
* AT 1222 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS
STORM WAS LOCATED APPROXIMATELY NEAR HAMLET...OR 10 MILES NORTH OF
ALEDO...AND MOVING EAST AT 25 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
REYNOLDS...SHALE CITY...MATHERVILLE...BODEN...VIOLA...SHERRARD...
CABLE...NEW WINDSOR AND NORTH HENDERSON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PLEASE REPORT ANY SEVERE WEATHER OR DAMAGE TO YOUR LOCAL LAW
ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE.
&&
LAT...LON 4133 9098 4141 9081 4129 9033 4115 9042
4114 9043 4112 9043 4106 9047 4106 9054
TIME...MOT...LOC 0526Z 288DEG 23KT 4132 9077
WIND...HAIL <58MPH 1.00IN
$$
ERVIN6 follow-up statements
125
WWUS53 KDVN 010532
SVSDVN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1232 AM CDT SUN APR 1 2012
ILC073-131-161-010630-
/O.CON.KDVN.SV.W.0009.000000T0000Z-120401T0630Z/
HENRY IL-MERCER IL-ROCK ISLAND IL-
1232 AM CDT SUN APR 1 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 AM CDT
FOR SOUTH CENTRAL ROCK ISLAND...EASTERN MERCER AND SOUTHWESTERN HENRY
COUNTIES...
AT 1231 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL
SIZE HAIL. THIS STORM WAS LOCATED APPROXIMATELY NEAR HAMLET...OR 8
MILES NORTH OF ALEDO...MOVING EAST AT 25 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ALEDO
MERCER COUNTY AIRPORT...REYNOLDS...SHALE CITY...OLD GILCHRIST...
PREEMPTION...WANLOCK...MATHERVILLE...GILCHRIST...BODEN...BURGESS...
VIOLA...SHERRARD...CABLE...GRIFFIN...SWEDONA...NEW WINDSOR...NORTH
HENDERSON...OPHIEM AND LYNN CENTER.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PLEASE REPORT ANY SEVERE WEATHER OR DAMAGE TO YOUR LOCAL LAW
ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM CDT SUNDAY
MORNING FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS.
&&
LAT...LON 4133 9098 4141 9081 4129 9033 4115 9042
4114 9043 4112 9043 4106 9047 4106 9054
TIME...MOT...LOC 0532Z 288DEG 23KT 4131 9072
WIND...HAIL <58MPH 1.50IN
$$
ERVIN403
WWUS53 KDVN 010543
SVSDVN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1243 AM CDT SUN APR 1 2012
ILC073-131-161-010630-
/O.CON.KDVN.SV.W.0009.000000T0000Z-120401T0630Z/
HENRY IL-MERCER IL-ROCK ISLAND IL-
1243 AM CDT SUN APR 1 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 AM CDT
FOR SOUTH CENTRAL ROCK ISLAND...EASTERN MERCER AND SOUTHWESTERN HENRY
COUNTIES...
AT 1240 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL
SIZE HAIL. THIS STORM WAS LOCATED APPROXIMATELY NEAR GINGLE
CORNERS...OR 7 MILES NORTHEAST OF ALEDO...MOVING SOUTHEAST AT 20 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
PREEMPTION...SHALE CITY...MATHERVILLE...OLD GILCHRIST...WANLOCK...
BODEN...GILCHRIST...SHERRARD...VIOLA...CABLE...BURGESS...GRIFFIN...
SWEDONA...LYNN CENTER...NEW WINDSOR...OPHIEM AND NORTH HENDERSON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PLEASE REPORT ANY SEVERE WEATHER OR DAMAGE TO YOUR LOCAL LAW
ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM CDT SUNDAY
MORNING FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS.
&&
LAT...LON 4133 9098 4141 9081 4129 9033 4115 9042
4114 9043 4112 9043 4106 9047 4106 9054
TIME...MOT...LOC 0543Z 304DEG 19KT 4128 9067
WIND...HAIL <58MPH 1.50IN
$$
ERVIN965
WWUS53 KDVN 010557
SVSDVN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1257 AM CDT SUN APR 1 2012
ILC161-010607-
/O.CAN.KDVN.SV.W.0009.000000T0000Z-120401T0630Z/
ROCK ISLAND IL-
1257 AM CDT SUN APR 1 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL ROCK ISLAND
COUNTY IS CANCELLED...
THE THUNDERSTORM THAT WAS CAPABLE OF PRODUCING LARGE HAIL...HAS
MOVED OUT OF THE WARNED AREA. THEREFORE THE SEVERE THUNDERSTORM
WARNING HAS BEEN CANCELLED.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM CDT SUNDAY
MORNING FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS.
LAT...LON 4129 9078 4133 9062 4129 9033 4115 9042
4114 9043 4112 9043 4106 9047 4106 9054
TIME...MOT...LOC 0557Z 304DEG 19KT 4123 9059
$$
ILC073-131-010630-
/O.CON.KDVN.SV.W.0009.000000T0000Z-120401T0630Z/
HENRY IL-MERCER IL-
1257 AM CDT SUN APR 1 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 AM CDT
FOR EASTERN MERCER AND SOUTHWESTERN HENRY COUNTIES...
AT 1253 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL. THIS STORM WAS LOCATED APPROXIMATELY NEAR MATHERVILLE...OR 8
MILES NORTHEAST OF ALEDO...MOVING SOUTHEAST AT 20 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
VIOLA...CABLE...GRIFFIN...SWEDONA...NEW WINDSOR...OPHIEM AND NORTH
HENDERSON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PLEASE REPORT ANY SEVERE WEATHER OR DAMAGE TO YOUR LOCAL LAW
ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM CDT SUNDAY
MORNING FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS.
&&
LAT...LON 4129 9078 4133 9062 4129 9033 4115 9042
4114 9043 4112 9043 4106 9047 4106 9054
TIME...MOT...LOC 0557Z 304DEG 19KT 4123 9059
WIND...HAIL <58MPH 1.00IN
$$
ERVIN046
WWUS53 KDVN 010606
SVSDVN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
106 AM CDT SUN APR 1 2012
ILC073-131-010630-
/O.CON.KDVN.SV.W.0009.000000T0000Z-120401T0630Z/
HENRY IL-MERCER IL-
106 AM CDT SUN APR 1 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 AM CDT
FOR EASTERN MERCER AND SOUTHWESTERN HENRY COUNTIES...
AT 1240 AM CDT...LAW ENFORCEMENT REPORTED A SEVERE THUNDERSTORM
PRODUCING PING PONG BALL SIZE HAIL. THIS STORM WAS LOCATED
APPROXIMATELY NEAR OLD GILCHRIST...OR 8 MILES EAST OF ALEDO...MOVING
SOUTHEAST AT 20 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
GRIFFIN...SWEDONA...NEW WINDSOR...OPHIEM AND NORTH HENDERSON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PLEASE REPORT ANY SEVERE WEATHER OR DAMAGE TO YOUR LOCAL LAW
ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM CDT SUNDAY
MORNING FOR NORTHEASTERN IOWA AND NORTHWESTERN ILLINOIS.
&&
LAT...LON 4129 9078 4133 9062 4129 9033 4115 9042
4114 9043 4112 9043 4106 9047 4106 9054
TIME...MOT...LOC 0606Z 304DEG 19KT 4122 9057
WIND...HAIL <58MPH 1.50IN
$$
ERVIN649
WWUS53 KDVN 010621
SVSDVN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
121 AM CDT SUN APR 1 2012
ILC073-131-010630-
/O.CON.KDVN.SV.W.0009.000000T0000Z-120401T0630Z/
HENRY IL-MERCER IL-
121 AM CDT SUN APR 1 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 AM CDT
FOR SOUTHEASTERN MERCER AND SOUTHWESTERN HENRY COUNTIES...
AT 119 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL. THIS STORM WAS LOCATED APPROXIMATELY NEAR NEW WINDSOR...OR 13
MILES EAST OF ALEDO...MOVING SOUTHEAST AT 20 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO OPHIEM
AND NORTH HENDERSON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PLEASE REPORT ANY SEVERE WEATHER OR DAMAGE TO YOUR LOCAL LAW
ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM CDT SUNDAY
MORNING FOR NORTHEASTERN IOWA AND NORTHWESTERN ILLINOIS.
&&
LAT...LON 4118 9062 4127 9054 4129 9033 4115 9042
4114 9043 4111 9043 4107 9047 4106 9047
4106 9054
TIME...MOT...LOC 0621Z 304DEG 19KT 4117 9048
WIND...HAIL <58MPH 1.00IN
$$
ERVIN009
WWUS53 KDVN 010628
SVSDVN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
128 AM CDT SUN APR 1 2012
ILC073-131-010638-
/O.EXP.KDVN.SV.W.0009.000000T0000Z-120401T0630Z/
HENRY IL-MERCER IL-
128 AM CDT SUN APR 1 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MERCER AND
SOUTHWESTERN HENRY COUNTIES WILL EXPIRE AT 130 AM CDT...
THE THUNDERSTORM THAT WAS CAPABLE OF PRODUCING SEVERE WEATHER HAS
MOVED OUT OF THE WARNED AREA. THEREFORE THE SEVERE THUNDERSTORM
WARNING HAS BEEN ALLOWED TO EXPIRE.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM CDT SUNDAY
MORNING FOR NORTHEASTERN IOWA AND NORTHWESTERN ILLINOIS.
LAT...LON 4118 9062 4127 9054 4129 9033 4115 9042
4114 9043 4111 9043 4107 9047 4106 9047
4106 9054
TIME...MOT...LOC 0628Z 304DEG 19KT 4115 9044
$$
ERVINThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 31, 10:17 PM CDT | Severe Thunderstorm Warning | DVN | Rock Island | 58 min |
| Mar 31, 11:51 PM CDT | Severe Thunderstorm Warning | DVN | Jo Daviess | 54 min |
| Apr 1, 1:19 AM CDT | Severe Thunderstorm Warning | DVN | Stephenson | 27 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2012Every severe thunderstorm warning in 2012
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.