Alert archive / Illinois / Severe Thunderstorm Warnings in 2006
Severe Thunderstorm Warning 222, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Sep 22, 2006, 3:34 PM CDT for Bureau County, Whiteside County, Illinois. It was in force for 56 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 22, 2006, 3:34 PM CDT (20:34 UTC)
- Expired
- Sep 22, 2006, 4:30 PM CDT
- In force
- 56 min
- Issued by
- NWS Quad Cities, IA
- Area
- Counties, with a storm outline in the text
Counties Bureau County, IL, Whiteside County, IL
The radar
The Quad Cities radar (KDVN), 72 km from the middle of the area, began a volume at 20:34 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 |
|---|---|---|---|
| Sep 22, 3:32 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 8.6 hours before the alert went out and 65 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
- 840 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 439 m²/s²
- 0-3 km storm-relative helicity
- 440 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Sep 22, 3:00 PM CDT, 34 minutes earlier.
Area forecast discussion, Sep 22, 3:00 PM CDT, 34 minutes before
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</html>Hazardous weather outlook, Sep 22, 11:35 AM CDT, 3 hours 59 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE QUAD CITIES IA IL 1135 AM CDT FRI SEP 22 2006 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-231000- BENTON IA-BUCHANAN IA-BUREAU IL-CARROLL IL-CEDAR IA-CLARK MO- CLINTON IA-DELAWARE IA-DES MOINES IA-DUBUQUE IA-HANCOCK IL- HENDERSON IL-HENRY IA-HENRY IL-IOWA IA-JACKSON IA-JEFFERSON IA- JO DAVIESS IL-JOHNSON IA-JONES IA-KEOKUK IA-LEE IA-LINN IA-LOUISA IA- MCDONOUGH IL-MERCER IL-MUSCATINE IA-PUTNAM IL-ROCK ISLAND IL- SCOTLAND MO-SCOTT IA-STEPHENSON IL-VAN BUREN IA-WARREN IL- WASHINGTON IA-WHITESIDE IL- 1135 AM CDT FRI SEP 22 2006 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...THIS AFTERNOON AND TONIGHT A SLIGHT RISK FOR SEVERE THUNDERSTORMS CONTINUES OVER SOUTHEAST IOWA...ILLINOIS...AND NORTHEAST MISSOURI THIS AFTERNOON AND TONIGHT. A STRONG STORM SYSTEM IN THE PLAINS WILL BRING THE THREAT FOR ISOLATED TO SCATTERED THUNDERSTORMS TO THE AREA MAINLY AFTER 1 PM THIS AFTERNOON...AND CONTINUE THROUGH THIS EVENING. THE COMBINATION OF WIND SHEAR AND UNSTABLE AIR WILL ALLOW FOR THE STRONGEST STORMS TO DEVELOP INTO ISOLATED SUPERCELLS THIS AFTERNOON AND EARLY THIS EVENING. THIS WILL BE ESPECIALLY TRUE IF CLOUD COVER CAN DECREASE AND SOUTHERLY WINDS BRING DEWPOINTS UP INTO THE 60S. LATEST THINKING SUGGESTS THAT THESE PARAMETERS AND THUS THE THREAT FOR SEVERE THUNDERSTORMS APPEAR HIGHEST SOUTHEAST OF A LINE FROM KEOKUK IN EXTREME SOUTHEAST IOWA...TO STERLING IN NORTHWEST ILLINOIS. EVEN IN THIS AREA...STORMS ARE EXPECTED TO BE ISOLATED. THE MAIN THREAT WITH THE SUPERCELL THUNDERSTORMS WILL BE QUICKLY DEVELOPING SPIN UP TORNADOES...AND HAIL THE SIZE OF PENNIES. ONCE THEY FORM...THE STORMS ARE ALSO EXPECTED TO BE VERY QUICK MOVING AT SPEEDS OF 40 TO 50 MPH. A MODERATE RISK FOR SEVERE STORMS EXISTS FARTHER SOUTHEAST... FROM EAST CENTRAL MISSOURI ACROSS CENTRAL ILLINOIS. STAY TUNED FOR POSSIBLE WATCHES AND WARNINGS THIS AFTERNOON AND EVENING. LATER TONIGHT...ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS IS EXPECTED TO SPREAD NORTHEAST OUT OF MISSOURI. A THIS TIME...THESE THUNDERSTORMS ARE NOT EXPECTED TO BE SEVERE. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS THE OUTLOOK AREA SATURDAY AND EARLY SATURDAY EVENING. THE STORM PREDICTION CENTER HAS MUCH OF THE AREA IN A SLIGHT RISK FOR SEVERE THUNDERSTORMS SATURDAY. THE MAIN THREAT WITH THESE STORMS APPEARS TO BE FROM HAIL AND GUSTY WINDS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND THIS EVENING... ESPECIALLY FOR LOCATIONS SOUTHEAST OF KEOKUK IOWA TO STERLING ILLINOIS. ERVIN/12
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 22, 4:29 PM CDT | Severe Thunderstorm Warning | DVN | Whiteside | 15 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2006Every severe thunderstorm warning in 2006
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.