Alert archive / Iowa / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 169, NWS Des Moines, IA

May 30, 2006Adair County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at May 30, 2006, 4:47 PM CDT for Adair County, Iowa. It was in force for 43 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
May 30, 2006, 4:47 PM CDT (21:47 UTC)
Expired
May 30, 2006, 5:30 PM CDT
In force
43 min
Issued by
NWS Des Moines, IA
Area
Counties, with a storm outline in the text

County Adair County, IA

The radar

The Des Moines radar (KDMX), 77 km from the middle of the area, began a volume at 21:49 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 nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 9.8 hours before the alert went out and 278 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-pSkew-T log-p diagram, Topeka, KS at 12:00Z on 2006-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Topeka, KS at 12:00Z on 2006-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -69 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1209 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
-69 m²/s²
0-3 km storm-relative helicity
39 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 Des Moines, IA wrote its last area forecast discussion before this severe thunderstorm warning went out at May 30, 3:35 PM CDT, 1 hour 12 minutes earlier.

Area forecast discussion, May 30, 3:35 PM CDT, 1 hour 12 minutes before
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE DES MOINES IA
335 PM CDT TUE MAY 30 2006

.DISCUSSION...
CDFNT HOLD NRLY STNRY ACRS THE SRN THIRD OF THE STATE AND DONT SEE
IT PROGRESSING SOUTH TOO FAST TONIGHT.  CNVCTN BGNG TO GO NOW ALNG
AND S OF THE BNDRY.  WITH SVR PARAMETERS VERY WK, DONT LOOK FOR
MUCH IN THE WAY OF SVR WX.  ISOLD SIG RAFL AMTS ARE POSSIBLE WITH
DEEP MSTR.  FRONT WL CONT TO SAG SWD WED AND WED NGT AND SHAVED BACK
THE POPS FOR BOTH PDS.  A SIG DROP FM PREV FCST AND KEPT MOST OF THE
RAIN OVR THE SRN THIRD OF THE STATE.  TEMPS WL REMAIN ABV NORM BUT
QUITE A BIT COOLER THAN THIS WKND.  SHUD SEE SOME WRM UP LATER IN
THE WEEK INTO THE WKND, BUT NOT A SUPER PUSH OF HOT AIR.  WX FOR THE
WKND A LTL MORE TRICKY WITH GFS SHWS A DECENT FFOPA SUN INTO MON.
FEEL THE GFS IS OVERAGRESSIVE WITH THIS GIVEN THE STRENGTH OF THE
ERN TROF IT IS TRYING TO DVLP.  ECMWF AND CAN ARE SIGNIFICANTLY
WEAKER WITH THE TROF.  GIVEN STATE OF THE INTRASEASONAL INDICES AND
POSITIONING OF CNVCTN IN THE IO, SUGGESTION IS TO GO WITH THE SOFTER
SOLNS.  WL BRUSH THE NERN PART OF THE CWA WITH SOME TSRA IN THE SUN
NGT TIMEFRAME.

&&

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

&&
Hazardous weather outlook, May 30, 2:26 PM CDT, 2 hours 21 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE DES MOINES IA
226 PM CDT TUE MAY 30 2006

IAZ038-039-047>050-057>062-070>075-081>086-092>097-311100-
GRUNDY-BLACK HAWK-BOONE-STORY-MARSHALL-TAMA-AUDUBON-GUTHRIE-
DALLAS-POLK-JASPER-POWESHIEK-CASS-ADAIR-MADISON-WARREN-MARION-
MAHASKA-ADAMS-UNION-CLARKE-LUCAS-MONROE-WAPELLO-TAYLOR-RINGGOLD-
DECATUR-WAYNE-APPANOOSE-DAVIS-
226 PM CDT TUE MAY 30 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL AND
SOUTHERN IOWA...ALONG AND SOUTH OF A LINE FROM WATERLOO...TO
BOONE...TO AUDUBON.

.DAY ONE...THIS AFTERNOON AND TONIGHT

SCATTERED THUNDERSTORMS WILL OCCUR ACROSS THE OUTLOOK AREA TODAY
AND TONIGHT. AN ISOLATED SEVERE STORM IS POSSIBLE THIS AFTERNOON
THROUGH EARLY EVENING MAINLY SOUTHEAST OF A WATERLOO TO NEWTON TO
LAMONI LINE. THE PRIMARY THREAT IS HAIL UP TO NICKEL SIZE.

A PERIOD OF HEAVY RAIN IS ALSO POSSIBLE. A FEW LOCATIONS MAY
RECEIVE 1 TO 1.5 INCHES OF RAIN THROUGH DAYBREAK WEDNESDAY...WITH A
AN ISOLATED AMOUNT APPROACHING 2 INCHES NOT OUT OF THE QUESTION.
ISOLATED FLASH FLOODING IS A SMALL THREAT TODAY AND TONIGHT IF HEAVY
RAINFALL REPEATEDLY OCCURS OVER ANY ONE AREA.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

SCATTERED THUNDERSTORMS WILL CONTINUE WEDNESDAY AND WEDNESDAY
NIGHT...BUT ARE NOT EXPECTED TO BE SEVERE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EARLY THIS
EVENING. REPORTS OF ANY HEAVY RAIN...OR ANY URBAN AND RURAL
FLOODING ARE REQUESTED.

IAZ004>007-015>017-023>028-033>037-044>046-311100-
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO-
POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN-
WEBSTER-HAMILTON-HARDIN-CRAWFORD-CARROLL-GREENE-
226 PM CDT TUE MAY 30 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL AND
NORTHERN IOWA...NORTH OF A LINE FROM WATERLOO...TO BOONE...TO
AUDUBON.

.DAY ONE...TODAY AND TONIGHT

WIDELY SCATTERED NON SEVERE THUNDERSTORMS MAY OCCUR THIS AFTERNOON
AND EARLY EVENING. A ISOLATED STORM COULD PRODUCE HAIL UP TO DIME
SIZE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

SCATTERED THUNDERSTORMS ARE POSSIBLE WEDNESDAY AND WEDNESDAY
NIGHT...BUT ARE EXPECTED TO REMAIN BELOW SEVERE LIMITS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.

KINNEY/R

The office that day

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

IssuedProductOfficeCountiesLasted
May 29, 7:21 PM CDTSevere Thunderstorm WarningDMXWorth24 min
May 30, 5:27 PM CDTSevere Thunderstorm WarningDMXUnion48 min

Nearby

Severe Thunderstorm Warnings in Iowa, 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.