Alert archive / Illinois / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 12, NWS Quad Cities, IA

March 11, 2006Henry County, Illinois

NWS Quad Cities, IA issued this severe thunderstorm warning at Mar 11, 2006, 6:34 PM CST for Henry County, Illinois. It was in force for 21 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: Mar 11, 2006, 6:34 PM CST (00:34 UTC)
Expired: Mar 11, 2006, 6:55 PM CST
In force: 21 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 00:36 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
Mar 11, 2:22 PM CST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 0.6 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: 529 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1583 m above ground
0-6 km bulk shear: 93 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: -15 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Mar 11, 3:31 PM CST, 3 hours 3 minutes earlier.

Area forecast discussion, Mar 11, 3:31 PM CST, 3 hours 3 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
330 PM CST SAT MAR 10

Hazardous weather outlook, Mar 11, 12:16 PM CST, 6 hours 18 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1216 PM CST SAT MAR 11 2006

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-121730-
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-
1216 PM CST SAT MAR 11 2006

...SLIGHT RISK OF SEVERE WEATHER TODAY...

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

FLOW FROM THE GULF OF MEXICO HAS ALLOWED WARM AND MOIST AIR TO
WORK ITS WAY TOWARD THE MID-MISSISSIPPI RIVER VALLEY THIS MORNING.
THE WARM AND MOIST AIR SHOULD AID INSTABILITY THIS AFTERNOON...
ALLOWING THUNDERSTORMS TO DEVELOP IN THE AREA. THE PRIMARY THREAT
FOR SEVERE WEATHER EXISTS SOUTH OF HIGHWAY 92 IN IOWA... IN ALL OF
NORTHEASTERN MISSOURI... AND ALONG AND EAST OF THE MISSISSIPPI
RIVER. ENOUGH WIND SHEAR IS PRESENT TO ALLOW DEVELOPMENT OF
SUPERCELL THUNDERSTORMS THAT WILL EVOLVE INTO A LINE OF STORMS
LATER IN THE EVENING. THE MAIN THREAT FROM THESE THUNDERSTORMS
WILL BE LARGE HAIL... ALTHOUGH DAMAGING WIND GUSTS ARE POSSIBLE AS
THE STORMS EVOLVE INTO A LINE IN THE EVENING. AN ISOLATED TORNADO
CANNOT BE RULED OUT... ALTHOUGH THE GREATER THREAT FOR TORNADOES
EXISTS IN EAST CENTRAL MISSOURI INTO SOUTHERN ILLINOIS. BRIEF HEAVY
RAINS MAY ALSO ACCOMPANY THUNDERSTORMS TODAY.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

ON SUNDAY... A MODERATE RISK OF SEVERE WEATHER EXISTS FOR THE AREA
SOUTH OF HIGHWAY 34 AND A SLIGHT RISK FOR SEVERE WEATHER EXISTS
FOR THE REST OF THE AREA. A STORM SYSTEM MOVING THROUGH THE AREA
ON SUNDAY AFTERNOON WILL AGAIN ALLOW SUPERCELL STORMS TO DEVELOP
IN THE AREA. WITH MORE MOISTURE TOMORROW THAN TODAY AS WELL AS
STRONGER WIND SHEAR... THESE STORMS WILL BE CAPABLE OF PRODUCING
LARGE HAIL... DAMAGING WINDS... AND ISOLATED TORNADOES. PLEASE
STAY TUNED TO KEEP ABREAST OF FORECAST UPDATES AS THIS SCENARIO
EVOLVES.

ON WEDNESDAY AND THURSDAY... A DISTURBANCE FROM THE PACIFIC WILL
BRING RAIN AND SNOW TO THE AREA. IT IS TOO EARLY TO ASSESS THE
POTENTIAL FOR RAIN AND SNOW AMOUNTS WITH THIS SYSTEM.

THE LOCALLY HEAVY RAINS POSSIBLE WITH STORMS THIS WEEK MAY CAUSE
LOCAL RIVERS TO EXPERIENCE MODERATE RISES. CURRENT RIVER LEVELS
ARE RUNNING NEAR TO BELOW NORMAL DUE TO THE ONGOING DROUGHT ACROSS
THE REGION.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS LIKELY THIS AFTERNOON AND EVENING AS WELL AS
TOMORROW. PLEASE REPORT ANY SEVERE WEATHER TO THE NATIONAL WEATHER
SERVICE OFFICE IN THE QUAD CITIES.

MAYES

In the hours before

Local storm report, Mar 11, 5:25 PM CST, 1 hour 9 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Local storm report, Mar 11, 5:43 PM CST, 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
543 PM CST SAT MAR 11 2006

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

0542 PM     HAIL             W GENESEO               41.45N 90.15W
03/11/2006  E0.88 INCH       HENRY              IL   TRAINED SPOTTER

            WEST OF GENESEO ON INTERSTATE 80.

&&

DANF

Local storm report, Mar 11, 5:51 PM CST, 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
551 PM CST SAT MAR 11 2006

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

0542 PM     HAIL             S GREENBUSH             40.72N 90.53W
03/11/2006  E0.75 INCH       WARREN             IL   PUBLIC

&&

DANF

Local storm report, Mar 11, 5:52 PM CST, 42 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
552 PM CST SAT MAR 11 2006

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

0535 PM     HAIL             S GREENBUSH             40.72N 90.53W
03/11/2006  E0.75 INCH       WARREN             IL   PUBLIC

&&

DANF

Local storm report, Mar 11, 5:54 PM CST, 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
554 PM CST SAT MAR 11 2006

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

0549 PM     HAIL             3 W ATKINSON            41.42N 90.07W
03/11/2006  E0.75 INCH       HENRY              IL   TRAINED SPOTTER

            SPOTTER REPORTED THE GROUND WAS COVERED WITH DIME SIZE
            HAIL AT MILE MARKER 25 ALONG INTERSTATE 80.

&&

MIKEZ

Local storm report, Mar 11, 5:58 PM CST, 36 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
558 PM CST SAT MAR 11 2006

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

0547 PM     HEAVY RAIN       MACOMB                  40.47N 90.68W
03/11/2006  E1.00 INCH       MCDONOUGH          IL   TRAINED SPOTTER

            SPOTTER ESTIMATED 1.00 RAIN FALL IN PAST 30 MINUTES.
            MINOR STREET FLOODING.

&&

MIKEZ

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 12, 1:43 PM CST	Severe Thunderstorm Warning	DVN	Van Buren	47 min
Mar 12, 2:03 PM CST	Severe Thunderstorm Warning	DVN	Jefferson	22 min
Mar 12, 2:45 PM CST	Severe Thunderstorm Warning	DVN	Des Moines, Henry, Louisa	28 min
Mar 12, 5:42 PM CST	Severe Thunderstorm Warning	DVN	Van Buren	30 min
Mar 12, 5:48 PM CST	Severe Thunderstorm Warning	DVN	Henry	42 min
Mar 11, 6:44 PM CST	Severe Thunderstorm Warning	DVN	Bureau	44 min
Mar 12, 2:41 PM CST	Severe Thunderstorm Warning	DVN	Warren	26 min
Mar 12, 4:08 PM CST	Severe Thunderstorm Warning	DVN	Putnam	17 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.