Alert archive / Illinois / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 2, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Mar 22, 2011, 12:36 AM CDT for Whiteside County, Illinois. It was in force for 33 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
- Mar 22, 2011, 12:36 AM CDT (05:36 UTC)
- Expired
- Mar 22, 2011, 1:09 AM CDT
- In force
- 33 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 58.0 mph
County Whiteside County, IL
The radar
The Quad Cities radar (KDVN), 60 km from the middle of the area, began a volume at 05:38 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 |
|---|---|---|---|
| Mar 22, 12:45 AM CDT | HAIL 0.75 | Prophetstown, IL | HAIL FELL FOR UP TO 20 MINUTES. |
| Mar 22, 12:45 AM CDT | HAIL 1 | Prophetstown, IL | DIME TO QUARTER SIZE HAIL COVERED THE GROUND. TIME ESTIMATED. |
| Mar 22, 1:02 AM CDT | HAIL 0.25 | Deer Grove, IL |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 5.6 hours before the alert went out and 53 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
- 3088 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 92 m²/s²
- 0-3 km storm-relative helicity
- 300 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
757 WUUS53 KDVN 220536 SVRDVN ILC195-220630- /O.NEW.KDVN.SV.W.0002.110322T0536Z-110322T0630Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 1236 AM CDT TUE MAR 22 2011 THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN WHITESIDE COUNTY IN NORTHWEST ILLINOIS... * UNTIL 130 AM CDT. * AT 1233 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED APPROXIMATELY NEAR PROPHETSTOWN...OR 12 MILES SOUTH OF MORRISON...AND MOVING EAST AT 40 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... TAMPICO AROUND 1245 AM CDT... DEER GROVE AROUND 1250 AM CDT... 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 4159 9003 4171 8999 4175 8963 4159 8963 TIME...MOT...LOC 0536Z 268DEG 36KT 4164 8989 WIND...HAIL <58MPH 1.00IN $$
3 follow-up statements
131 WWUS53 KDVN 220549 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 1249 AM CDT TUE MAR 22 2011 ILC195-220630- /O.CON.KDVN.SV.W.0002.000000T0000Z-110322T0630Z/ WHITESIDE IL- 1249 AM CDT TUE MAR 22 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 AM CDT FOR SOUTHEASTERN WHITESIDE COUNTY... AT 1246 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED APPROXIMATELY NEAR TAMPICO...OR 10 MILES SOUTHWEST OF ROCK FALLS...MOVING EAST AT 40 MPH. THE SEVERE THUNDERSTORM WILL BE NEAR... DEER GROVE AROUND 1255 AM CDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... PLEASE REPORT ANY SEVERE WEATHER OR DAMAGE TO YOUR LOCAL LAW ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE. THIS STORM IS ALSO PRODUCING HEAVY RAIN AND URBAN AND SMALL STREAM FLOODING. && LAT...LON 4159 8990 4169 8986 4175 8963 4159 8963 TIME...MOT...LOC 0549Z 268DEG 36KT 4164 8975 WIND...HAIL <58MPH 1.00IN $$
908 WWUS53 KDVN 220558 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 1258 AM CDT TUE MAR 22 2011 ILC195-220630- /O.CON.KDVN.SV.W.0002.000000T0000Z-110322T0630Z/ WHITESIDE IL- 1258 AM CDT TUE MAR 22 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 AM CDT FOR SOUTHEASTERN WHITESIDE COUNTY... AT 1255 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 DEER GROVE...OR 9 MILES SOUTH OF ROCK FALLS...MOVING EAST AT 40 MPH. AT 1245 AM CDT... LAW ENFORCEMENT REPORTED DIME SIZE HAIL IN PROPHETSTOWN. PRECAUTIONARY/PREPAREDNESS ACTIONS... PLEASE REPORT ANY SEVERE WEATHER OR DAMAGE TO YOUR LOCAL LAW ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE. THIS STORM IS ALSO PRODUCING HEAVY RAIN AND URBAN AND SMALL STREAM FLOODING. && LAT...LON 4159 8979 4167 8979 4171 8963 4159 8963 TIME...MOT...LOC 0557Z 268DEG 36KT 4164 8967 WIND...HAIL <58MPH 1.00IN $$
998 WWUS53 KDVN 220609 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 109 AM CDT TUE MAR 22 2011 ILC195-220619- /O.CAN.KDVN.SV.W.0002.000000T0000Z-110322T0630Z/ WHITESIDE IL- 109 AM CDT TUE MAR 22 2011 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WHITESIDE COUNTY IS CANCELLED... THE THUNDERSTORM THAT WAS CAPABLE OF PRODUCING SEVERE WEATHER HAS WEAKENED AND MOVED OUT OF THE WARNED AREA. THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED. LAT...LON 4159 8979 4167 8979 4171 8963 4159 8963 TIME...MOT...LOC 0609Z 268DEG 36KT 4165 8948 $$
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 22, 12:30 AM CDT | Special Weather Statement | DVN | Whiteside | 60 min |
| Mar 22, 12:47 AM CDT | Special Weather Statement | DVN | Whiteside | 58 min |
| Mar 22, 2:23 PM CDT | Special Weather Statement | DVN | Carroll, Jo Daviess | 52 min |
| Mar 22, 6:19 PM CDT | Special Weather Statement | DVN | Mercer, Rock Island | 56 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2011Every severe thunderstorm warning in 2011
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.