Alert archive / Iowa / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 188, NWS Des Moines, IA

June 21, 2006Grundy County, Hardin County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 21, 2006, 9:50 AM CDT for Grundy County, Hardin County, Iowa. It was in force for 40 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: Jun 21, 2006, 9:50 AM CDT (14:50 UTC)
Expired: Jun 21, 2006, 10:30 AM CDT
In force: 40 min
Issued by: NWS Des Moines, IA
Area: Counties, with a storm outline in the text

Counties Grundy County, IA, Hardin County, IA

The radar

The Des Moines radar (KDMX), 94 km from the middle of the area, began a volume at 14:50 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
Jun 21, 8:42 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 2.8 hours before the alert went out and 225 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: 1472 J/kg
Mixed-layer CIN: -118 J/kg
Mixed-layer LCL: 939 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 186 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.1

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 Des Moines, IA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 21, 3:45 AM CDT, 6 hours 5 minutes earlier.

Area forecast discussion, Jun 21, 3:45 AM CDT, 6 hours 5 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DES MOINES IA
345 AM CDT WED JUN 21 2006

.DISCUSSION...
FNTL BNDRY ACRS IA IN COMBO WITH 50+ KT LLJ CONT TO SET OF TSRA ALNG
EDGE OF UPR CAP.  STRMS XPCTD TO REMAIN BLO SVR LVLS, BUT HAIL NOT
OUT OF QUES IN SPIT OF VRY WRM CONDS ALV.  WND PSBL CONCERN SIM TO
WHAT HAPPENED YDA.  ALSO MAY SEE SOME MOVE OUT OF SD WITH DVLPG MCS,
HWVR SUPPORT NOT AS SIG FOR THIS AND DONT XPCT IT TO BE THE MAJOR
PLAYER.  FURTHER DVLPMT XCPCT IN THE S THIS AFTN INTO TNGT WITH MAIN
ACTION SHIFTING S WITH TIME.  NEXT SYS ON SKED TO ARRIVE IN THE FRI
NGT THRU SAT NGT TIMEFRAME.  AS FOR TEMPS, GUID LKS RSBL WITH
EXTENSIVE CLOUD CVR KEEPING A LID ON THINGS TDA AND CAA DOMINATING
THROUGH THE NXT SVRL DAYS.

&&

.DMX WATCHES/WARNINGS/ADVISORIES...NONE.

&&

Hazardous weather outlook, Jun 21, 5:49 AM CDT, 4 hours 1 minute before

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In the hours before

Local storm report, Jun 21, 5:58 AM CDT, 3 hours 52 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
558 AM CDT WED JUN 21 2006

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

0512 AM     HAIL             REASNOR                 41.58N 93.02W
06/21/2006  E1.75 INCH       JASPER             IA   FIRE DEPT/RESCUE

&&

STEACHOU

Local storm report, Jun 21, 9:02 AM CDT, 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
902 AM CDT WED JUN 21 2006

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

0830 AM     TSTM WND DMG     JEFFERSON               42.02N 94.38W
06/21/2006                   GREENE             IA   LAW ENFORCEMENT

            TREES AND A STOP SIGN REPORTED DOWN BY MEDIA AND ROAD
            CREWS.

&&

KJ

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 21, 2:13 AM CDT	Severe Thunderstorm Warning	DMX	Lucas, Marion, Warren	47 min
Jun 21, 4:47 AM CDT	Severe Thunderstorm Warning	DMX	Marion, Warren	43 min
Jun 21, 4:56 AM CDT	Severe Thunderstorm Warning	DMX	Jasper, Polk	53 min
Jun 21, 5:11 AM CDT	Severe Thunderstorm Warning	DMX	Poweshiek	49 min
Jun 21, 7:52 AM CDT	Severe Thunderstorm Warning	DMX	Greene	23 min
Jun 21, 10:21 AM CDT	Severe Thunderstorm Warning	DMX	Butler, Franklin	39 min
Jun 21, 11:16 AM CDT	Severe Thunderstorm Warning	DMX	Guthrie	44 min
Jun 21, 11:50 AM CDT	Severe Thunderstorm Warning	DMX	Dallas, Madison	55 min
Jun 21, 12:41 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Madison	49 min
Jun 21, 1:21 PM CDT	Severe Thunderstorm Warning	DMX	Lucas	54 min

Nearby

Severe Thunderstorm Warnings in Iowa, 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.