Alert archive / Illinois / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 98, NWS Quad Cities, IA

April 13, 2006Henry County, Illinois

NWS Quad Cities, IA issued this severe thunderstorm warning at Apr 13, 2006, 10:18 PM CDT for Henry County, Illinois. It was in force for 39 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: Apr 13, 2006, 10:18 PM CDT (03:18 UTC)
Expired: Apr 13, 2006, 10:57 PM CDT
In force: 39 min
Issued by: NWS Quad Cities, IA
Area: Counties, with a storm outline in the text

County Henry County, IL

The radar

The Quad Cities radar (KDVN), 47 km from the middle of the area, began a volume at 03:19 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
Apr 13, 8:24 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 3.3 hours before the alert went out and 43 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 774 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 2028 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 122 m²/s²
0-3 km storm-relative helicity: 250 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.6

Open this sounding in Storm Lab

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 Apr 13, 5:42 PM CDT, 4 hours 36 minutes earlier.

Area forecast discussion, Apr 13, 5:42 PM CDT, 4 hours 36 minutes before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
542 PM CDT THU APR 13 2006

.UPDATE...
THUNDERSTORMS HAVE INITIATED OVER CENTRAL IOWA IN THE LAST 30
MINUTES...AND THIS IS A FAVORABLE LOCATION FOR STRONG TO SEVERE
THUNDERSTORMS TO MOVE INTO OUR CWA.  A SEVERE THUNDERSTORM WATCH AS
BEEN ISSUED TIL MIDNIGHT...AREAS NORTH OF HIGHWAY 78 IN IOWA...AND
FOR MERCER AND ROCK ISLAND IN ILLINOIS. THE MAIN THREAT SHOULD BE
LARGE HAIL AND VERY STRONG WINDS UP TO 80 MPH. SOME SUPERCELLS WILL
BE POSSIBLE AS WELL...MAINLY IN EASTERN IOWA EARLY THIS EVENING.
ERVIN

&&

.SYNOPSIS...
A COLD FRONT WILL SLOWLY SAG SOUTH TONIGHT AND STALL ACROSS THE
REGION FOR THE NEXT THREE DAYS. A SERIES OF LOW PRESSURE SYSTEMS ARE
FORECAST TO TRACK ALONG THE FRONT BRINGING SEVERAL ROUNDS OF RAIN TO
THE AREA.

&&

.DISCUSSION...
MOISTURE IS SLOWLY MOVING INTO THE REGION ALBEIT SLOWER THAN WHAT
THE MODELS HAVE BEEN INDICATING. NEW 18Z SOUNDING STILL HAS A
MINIMAL CAP ON IT. THIS CAP ALONG WITH VERY LIMITED MOISTURE HAS
PRECLUDED CONVECTION FROM DEVELOPING. CONVECTION SHOULD DEVELOP
FAIRLY QUICKLY THIS EVENING WITH IT TRANSFORMING INTO AN MCS THAT
EXITS THE AREA AROUND DAWN FRIDAY. MCS IN TURN WILL HELP PUSH THE
COLD FRONT SOUTH TO THE IA/MO BORDER WITH THE NEXT WAVE ARRIVING
FRIDAY AFTERNOON.

THE WAVE ON FRIDAY SHOULD INITIATE CONVECTION DURING THE
AFTERNOON/EVENING WITH DRY EASTERLY FLOW SETTING UP BY SATURDAY
MORNING. STALLED FRONT TO RETURN SATURDAY NIGHT/SUNDAY AND THIS
COULD GET INTERESTING IF THE MODELS ARE CORRECT. POTENTIAL IS THERE
FOR A MODERATE TO POSSIBLY HEAVY RAIN EVENT OVER ABOUT THE NORTH
HALF OF THE CWFA.

AFTER A QUIET MONDAY THROUGH TUESDAY MORNING...THE NEXT WAVE ARRIVES
TUESDAY AFTERNOON INTO WEDNESDAY BRINGING ANOTHER ROUND OF PRECIP TO
THE AREA. WEDNESDAY NIGHT AND THURSDAY LOOK DRY ATTM.

&&

.DVN WATCHES/WARNINGS/ADVISORIES...
IA...SEVERE THUNDERSTORM WATCH TIL MIDNIGHT NORTH OF HIGHWAY 78.
IL...SEVERE THUNDERSTORM WATCH TIL MIDNIGHT ROCK ISLAND AND MERCER.
MO...NONE.

ERVIN/08

Hazardous weather outlook, Apr 13, 1:55 PM CDT, 8 hours 23 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
155 PM CDT THU APR 13 2006

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-141015-
BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON-
CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-LOUISA-JEFFERSON-
HENRY IA-DES MOINES-VAN BUREN-LEE-JO DAVIESS-STEPHENSON-CARROLL-
WHITESIDE-ROCK ISLAND-HENRY IL-BUREAU-PUTNAM-MERCER-HENDERSON-
WARREN-HANCOCK-MCDONOUGH-SCOTLAND-CLARK-
155 PM CDT THU APR 13 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

THE ENTIRE OUTLOOK AREA REMAINS IN A SLIGHT RISK OF SEVERE
THUNDERSTORMS...FOR MAINLY THIS EVENING.

SCATTERED THUNDERSTORMS ARE LIKELY TO DEVELOP TOWARD EVENING
OVER SOUTHERN MINNESOTA AND PORTIONS OF NORTH CENTRAL AND
NORTHEAST IOWA. THESE STORMS MAY THEN DEVELOP INTO A COMPLEX AND
MOVE QUICKLY SOUTHEAST ACROSS EASTERN IOWA AND NORTHWEST ILLINOIS
TONIGHT BETWEEN 7 PM AND 1 AM. THE MAIN THREAT FROM THESE STORMS
WILL BE DAMAGING STRAIGHT LINE WINDS OF 60 TO 80 MPH. SECONDARY
THREATS WILL BE LARGE HAIL AND HEAVY RAIN. THE PORTION OF THE
OUTLOOK AREA MOST AT RISK IS GENERALLY NORTHEAST OF A LINE FROM
WASHINGTON IOWA...TO MONMOUTH ILLINOIS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THERE IS A CONTINUED RISK FOR SEVERE WEATHER ACROSS PORTIONS OF
THE OUTLOOK AREA FRIDAY THROUGH SATURDAY NIGHT AS A STRONG FRONT
LINGERS IN THE REGION. ON FRIDAY...THERE IS A SLIGHT RISK FOR
SEVERE STORMS FOR AREAS SOUTH OF INTERSTATE 80 IN THE AFTERNOON
AND EVENING. THE AREA OF MAIN CONCERN WILL BE NEAR A STALLED FRONTAL
WEST TO EAST BOUNDARY IN THE VICINITY OF SOUTHEAST IOWA...NORTHEAST
MISSOURI INTO WEST CENTRAL ILLINOIS. CONDITIONS IN THIS AREA MAY
BE FAVORABLE FOR SUPERCELL THUNDERSTORMS CAPABLE OF PRODUCING
LARGE HAIL AND DAMAGING WIND.

A MORE WIDESPREAD SEVERE WEATHER EVENT IS POSSIBLE SATURDAY INTO
SATURDAY NIGHT ACROSS THE ENTIRE OUTLOOK AREA AS A STRONG UPPER
LEVEL SYSTEM MOVES THROUGH THE REGION. SUPERCELL THUNDERSTORMS
WILL BE POSSIBLE AS A WARM FRONT LIFTS NORTHEAST IN THE AFTERNOON.
THESE MAY BE CAPABLE OF PRODUCING LARGE HAIL...DAMAGING WIND...AND
ISOLATED TORNADOES. HEAVY RAINFALL WILL ALSO BE POSSIBLE...WHICH
MAY CAUSE MINOR FLOODING AND RISING RIVER LEVELS.

.SPOTTER INFORMATION STATEMENT...

STORM SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING.

MCCLURE

In the hours before

Local storm report, Apr 13, 9:52 PM CDT, 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
952 PM CDT THU APR 13 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0945 PM     HAIL             INDEPENDENCE            42.47N 91.89W
04/13/2006  E1.00 INCH       BUCHANAN           IA   LAW ENFORCEMENT

&&

RAYW

Local storm report, Apr 13, 9:54 PM CDT, 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
954 PM CDT THU APR 13 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0951 PM     HAIL             PRINCETON               41.38N 89.47W
04/13/2006  M0.50 INCH       BUREAU             IL   TRAINED SPOTTER

&&

DLF

Local storm report, Apr 13, 10:00 PM CDT, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1000 PM CDT THU APR 13 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0956 PM     HAIL             MUSCATINE               41.42N 91.07W
04/13/2006  E0.50 INCH       MUSCATINE          IA   TRAINED SPOTTER

            SPOTTER ALSO RELAYED REPORTS OF GOLF BALL SIZE HAIL IN
            ILLINOIS CITY AT ABOUT 0946 P.M.

&&

MIKEZ

Local storm report, Apr 13, 10:06 PM CDT, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1006 PM CDT THU APR 13 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1003 PM     HAIL             PUTNAM                  41.18N 89.40W
04/13/2006  E0.88 INCH       PUTNAM             IL   TRAINED SPOTTER

            SPOTTER REPORTED DIME TO NICKEL SIZE HAIL WITH HEAVY
            RAIN.

&&

MIKEZ

Local storm report, Apr 13, 10:11 PM CDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1011 PM CDT THU APR 13 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1008 PM     HAIL             NEW WINDSOR             41.20N 90.45W
04/13/2006  M1.00 INCH       MERCER             IL   TRAINED SPOTTER

&&

DLF

Local storm report, Apr 13, 10:14 PM CDT, 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1014 PM CDT THU APR 13 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1009 PM     HAIL             4 WNW ALEXIS            41.09N 90.64W
04/13/2006  E0.88 INCH       MERCER             IL   TRAINED SPOTTER

&&

MIKEZ

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 13, 7:16 PM CDT	Severe Thunderstorm Warning	DVN	Iowa	44 min
Apr 13, 7:20 PM CDT	Severe Thunderstorm Warning	DVN	Linn	55 min
Apr 13, 7:28 PM CDT	Severe Thunderstorm Warning	DVN	Buchanan, Delaware	62 min
Apr 13, 7:32 PM CDT	Severe Thunderstorm Warning	DVN	Johnson	58 min
Apr 13, 7:37 PM CDT	Severe Thunderstorm Warning	DVN	Jones	53 min
Apr 13, 7:39 PM CDT	Tornado Warning	DVN	Linn	51 min
Apr 13, 7:45 PM CDT	Tornado Warning	DVN	Benton	45 min
Apr 13, 7:55 PM CDT	Tornado Warning	DVN	Jones	65 min
Apr 13, 7:57 PM CDT	Severe Thunderstorm Warning	DVN	Dubuque	63 min
Apr 13, 7:58 PM CDT	Tornado Warning	DVN	Johnson	62 min
Apr 13, 8:07 PM CDT	Severe Thunderstorm Warning	DVN	Benton	53 min
Apr 13, 8:12 PM CDT	Severe Thunderstorm Warning	DVN	Jackson	63 min
Apr 13, 8:18 PM CDT	Tornado Warning	DVN	Cedar	57 min
Apr 13, 8:23 PM CDT	Severe Thunderstorm Warning	DVN	Delaware	52 min
Apr 13, 8:23 PM CDT	Tornado Warning	DVN	Muscatine	67 min
Apr 13, 8:28 PM CDT	Severe Thunderstorm Warning	DVN	Linn	62 min
Apr 13, 8:46 PM CDT	Severe Thunderstorm Warning	DVN	Clinton	59 min
Apr 13, 8:47 PM CDT	Tornado Warning	DVN	Johnson	58 min
Apr 13, 8:53 PM CDT	Severe Thunderstorm Warning	DVN	Benton	52 min
Apr 13, 8:56 PM CDT	Tornado Warning	DVN	Scott	64 min
Apr 13, 8:59 PM CDT	Severe Thunderstorm Warning	DVN	Dubuque	43 min
Apr 13, 9:07 PM CDT	Severe Thunderstorm Warning	DVN	Buchanan	53 min
Apr 13, 9:10 PM CDT	Tornado Warning	DVN	Cedar	49 min
Apr 13, 9:14 PM CDT	Severe Thunderstorm Warning	DVN	Linn	48 min
Apr 13, 9:23 PM CDT	Severe Thunderstorm Warning	DVN	Jones	67 min
Apr 13, 9:26 PM CDT	Severe Thunderstorm Warning	DVN	Scott	37 min
Apr 13, 9:26 PM CDT	Tornado Warning	DVN	Muscatine	39 min
Apr 13, 9:34 PM CDT	Severe Thunderstorm Warning	DVN	Delaware	56 min
Apr 13, 9:36 PM CDT	Severe Thunderstorm Warning	DVN	Jackson	54 min
Apr 13, 10:04 PM CDT	Severe Thunderstorm Warning	DVN	Jackson	56 min
Apr 13, 10:28 PM CDT	Severe Thunderstorm Warning	DVN	Delaware, Dubuque	50 min
Apr 13, 10:32 PM CDT	Severe Thunderstorm Warning	DVN	Clinton	49 min
Apr 13, 10:53 PM CDT	Severe Thunderstorm Warning	DVN	Jackson	34 min
Apr 13, 8:33 PM CDT	Severe Thunderstorm Warning	DVN	Jo Daviess	57 min
Apr 13, 8:39 PM CDT	Severe Thunderstorm Warning	DVN	Whiteside	66 min
Apr 13, 9:12 PM CDT	Severe Thunderstorm Warning	DVN	Stephenson	49 min
Apr 13, 9:37 PM CDT	Severe Thunderstorm Warning	DVN	Henry	53 min
Apr 13, 9:54 PM CDT	Tornado Warning	DVN	Mercer	53 min
Apr 13, 9:55 PM CDT	Severe Thunderstorm Warning	DVN	Bureau	65 min
Apr 13, 9:59 PM CDT	Severe Thunderstorm Warning	DVN	Henderson, Warren	61 min
Apr 13, 10:17 PM CDT	Severe Thunderstorm Warning	DVN	Putnam	58 min
Apr 13, 11:37 PM CDT	Severe Thunderstorm Warning	DVN	Henry	19 min
Apr 14, 12:28 AM CDT	Severe Thunderstorm Warning	DVN	Bureau, Putnam	47 min
Apr 14, 8:48 AM CDT	Severe Thunderstorm Warning	DVN	McDonough	16 min
Apr 14, 6:01 PM CDT	Severe Thunderstorm Warning	DVN	Henry	44 min
Apr 14, 6:01 PM CDT	Severe Thunderstorm Warning	DVN	Henry	27 min
Apr 14, 6:40 PM CDT	Severe Thunderstorm Warning	DVN	Bureau, Putnam	22 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2006 Every 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.