Alert archive / Iowa / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 182, NWS Des Moines, IA

June 19, 2006Union County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 19, 2006, 1:30 AM CDT for Union County, Iowa. It was in force for 15 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 19, 2006, 1:30 AM CDT (06:30 UTC)
Expired: Jun 19, 2006, 1:45 AM CDT
In force: 15 min
Issued by: NWS Des Moines, IA
Area: Counties, with a storm outline in the text

County Union County, IA

The radar

The Des Moines radar (KDMX), 89 km from the middle of the area, began a volume at 06:32 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 6.5 hours before the alert went out and 189 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: 4 J/kg
Mixed-layer CIN: -112 J/kg
Mixed-layer LCL: 2335 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 511 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS53 KDMX 190630
SVRDMX
IAC175-190645-
/O.NEW.KDMX.SV.W.0182.060619T0630Z-060619T0645Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
130 AM CDT MON JUN 19 2006

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN UNION COUNTY IN SOUTH CENTRAL IOWA.

* UNTIL 145 AM CDT.

* AT 127 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED 10 MILES SOUTHEAST OF CRESTON...OR 50 MILES NORTH
  OF BETHANY...AND MOVING SOUTHEAST AT 50 MPH.

* THE SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
  SOUTHEASTERN UNION COUNTY...INCLUDING THE LOCATION OF ARISPE.

LARGE HAIL CAN CAUSE INJURY AND PROPERTY DAMAGE. SEEK SAFETY INDOORS
UNTIL THE STORM PASSES.

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS

LAT...LON 4108 9422 4091 9430 4090 9402 4102 9403

$$

COGIL

1 follow-up statement

000 
WWUS53 KDMX 190645
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
146 AM CDT MON JUN 19 2006

IAC175-190656-
/O.EXP.KDMX.SV.W.0182.000000T0000Z-060619T0645Z/
UNION IA-
146 AM CDT MON JUN 19 2006

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN UNION COUNTY HAS
BEEN ALLOWED TO EXPIRE...

AT 144 AM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE
THUNDERSTORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE AREA.
THEREFORE...THE SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED TO
EXPIRE.

LAT...LON 4108 9422 4091 9430 4090 9402 4102 9403

$$

COGIL

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 18, 9:52 PM CDT, 3 hours 38 minutes earlier.

Area forecast discussion, Jun 18, 9:52 PM CDT, 3 hours 38 minutes before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE DES MOINES IA
952 PM CDT SUN JUN 18 2006

.SHORT TERM /REST OF TONIGHT/...
LATEST REGIONAL RADAR INDICATING AN INCREASE IN SHRA/TSRA COVERAGE
ACROSS THE MID MO VALLEY - INTO WCENT IA AS THE UPR LVL
TROUGH/ASSOD VORTICITY MAXIMUM ACROSS THE NRN PLAINS/UPR MIDWEST
CONTINUES TO SAG SWD INTO THE MID MO VALLEY. INC IN MID/UPR LVL
CLOUD COVER ACROSS THE AFOREMENTIONED AREAS COINCIDENT WITH EXIT
REGION OF AN 85KT JET MAX FOCUSED INTO MID MO VALLEY...AIDING IN
DIV ALOFT. WITH RELATIVELY DRY AIR IN PLACE NEAR THE SFC...SHORT
RANGE MODELS DEPICTING STRONG WARM AIR/THETA-E ADV ON THE NOSE OF
SSW LLVL JET...COMBINED WITH MODEST MID LVL LAPSE RATES AND
LOCALIZED CONVERGENCE IN VCNTY OF THE STNRY FRONT SHOULD BE
SUFFICIENT TO CONT/INC ELV SHRA/TSRA DVPMNT OVR MUCH OF CENT IA
/MAINLY S OF HWY 20/ OVRNGHT. HAVE TIGHTENED GRIDDED FIELDS TO
REFLECT CURRENT 88-D COVERAGE AND HOURLY TRENDS. GFS/RUC/NAM-P ALL
IN AGREEMENT IN REGARDS TO ONGOING AND EVENTUAL EVOLUTION OF PCPN
THRU EARLY MON.

&&

.PREV DISCUSSION... (ISSUED 400 PM CDT SUN JUN 18 2006)

DISCUSSION...
THE MAIN FORECAST CONCERNS IN THE NEAR TERM ARE CONVECTIVE TRENDS
AND SVR WX POTENTIAL TONIGHT...AND AGAIN LATE MON INTO TUES. LATEST
INDICATIONS ARE THAT STORMS WILL FIRE NEAR SFC LOW/BOUNDARY IN
CNTRL/ERN NEBRASKA LATE THIS AFTERNOON THEN PROGRESS ESE INTO
SOUTHERN IA THIS EVENING. UNIDIRECTIONAL SHEAR AND STEEP LOWER LEVEL
LAPSE RATES INDICATE SOME WIND THREAT WITH POTENTIAL FOR A FORWARD
PROPAGATING COMPLEX. CORFIDI VECTORS INDICATE STORM MOTION AOA 40
KTS. THE PARALLEL NAM SUGGESTS STORM COVERAGE WILL BE MORE LIMITED
THAN THE 12KM NAM...AND HAVE KEPT POPS RATHER LOW FOR TONIGHT.
COOLER AIR WILL MOVE INTO NRN IA TEMPORARILY MONDAY BUT THE ACTIVE
WEATHER PATTERN WILL RESUME LATE MONDAY NIGHT INTO TUESDAY. FORECAST
CONFIDENCE IS INCREASING AS SHORT RANGE MODELS HAVE MAINTAINED
DECENT CONTINUITY FOR THE PAST COUPLE OF DAYS. A WARM FRONT WILL
PUSH INTO SW IA LATE MONDAY WITH THE MOST LIKELY SCENARIO A FEW
ELEVATED HAILERS. TUESDAY COULD BE QUITE ACTIVE WITH THE TRIPLE
POINT ACRS CENTRAL IA. THE MAIN CHANGES TO PREVIOUS FORECAST WERE TO
BUMP POPS UP A CATEGORY OR TWO. TUESDAY NIGHT INTO WEDNESDAY...THE
MAIN THREAT AREA WILL SHIFT ALONG THE BOUNDARY INTO SOUTHERN IOWA.
IN THE EXTENDED PERIOD...PRECIP CHCS WILL CONTINUE THURS INTO
FRIDAY. OTHERWISE...NEAR ZONAL FLOW WILL BUCKLE LATER IN THE PERIOD
ALLOW FOR A MODEST COOL DOWN.

&&

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

.SHORT TERM...STEINBUGL

Hazardous weather outlook, Jun 18, 3:52 PM CDT, 9 hours 38 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
352 PM CDT SUN JUN 18 2006

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>086-092>097-190800-
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO-
POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN-
WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-CRAWFORD-CARROLL-GREENE-
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-
352 PM CDT SUN JUN 18 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...TONIGHT

SCATTERED THUNDERSTORMS ARE POSSIBLE THIS EVENING THROUGH THE
OVERNIGHT HOURS...MAINLY OVER CENTRAL AND SOUTHERN SECTIONS OF THE
OUTLOOK AREA. A FEW OF THE STORMS THIS EVENING SOUTH OF HIGHWAY 30 MAY
BE SEVERE WITH DAMAGING THUNDERSTORM WINDS OF 60 TO 70 MPH THE
MAIN THREAT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

SCATTERED THUNDERSTORMS ARE EXPECTED LATE MONDAY THROUGH TUESDAY
ACROSS THE OUTLOOK AREA...A FEW OF WHICH COULD BE SEVERE. PERIODS
OF THUNDERSTORMS WILL CONTINUE ACROSS THE STATE WEDNESDAY THROUGH
FRIDAY...AND THE PROSPECTS FOR SEVERE WEATHER WILL BECOME CLEARER
IN THE COMING DAYS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING...MAINLY SOUTH OF
STATE HIGHWAY 30. SPOTTER ACTIVATION MAY AGAIN BE NEEDED LATE MONDAY
EVENING AND AGAIN TUESDAY INTO TUESDAY EVENING.

REV/KINNEY

In the hours before

Local storm report, Jun 19, 12:52 AM CDT, 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1252 AM CDT MON JUN 19 2006

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

1240 AM     HAIL             4 W CRESTON             41.06N 94.44W
06/19/2006  E1.00 INCH       UNION              IA   COUNTY OFFICIAL

            REPORTED BY LAW ENFORCEMENT.

&&

MRUSSELL

Local storm report, Jun 19, 12:54 AM CDT, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1254 AM CDT MON JUN 19 2006

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

1252 AM     HAIL             CRESTON                 41.06N 94.36W
06/19/2006  E1.50 INCH       UNION              IA   FIRE DEPT/RESCUE

            REPORTED BY CRESTON FIRE DEPARTMENT. NICKEL TO 1.5 INCH
            DIAMETER HAIL.

&&

MRUSSELL

Local storm report, Jun 19, 12:57 AM CDT, 33 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE DES MOINES IA
1257 AM CDT MON JUN 19 2006

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

1247 AM     HAIL             CRESTON                 41.06N 94.36W
06/19/2006  E1.50 INCH       UNION              IA   FIRE DEPT/RESCUE

            CORRECTED REPORT TIME. REPORTED BY CRESTON FIRE
            DEPARTMENT. NICKEL TO 1.5 INCH DIAMETER HAIL.

&&

MRUSSELL

Local storm report, Jun 19, 1:21 AM CDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
121 AM CDT MON JUN 19 2006

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

0119 AM     HAIL             CRESTON                 41.06N 94.36W
06/19/2006  E0.88 INCH       UNION              IA   LAW ENFORCEMENT

            NICKEL HAIL IN CRESTON AT SHERRIFF OFFICE.

&&

MRUSSELL

Local storm report, Jun 19, 1:25 AM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
125 AM CDT MON JUN 19 2006

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

0120 AM     HAIL             CRESTON                 41.06N 94.36W
06/19/2006  E1.00 INCH       UNION              IA   LAW ENFORCEMENT

            QUARTER SIZED HAIL COVERING THE ROAD. REPORTED BY LAW
            ENFORCEMENT.

&&

MRUSSELL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 12:00 AM CDT	Severe Thunderstorm Warning	DMX	Cass	30 min
Jun 19, 12:13 AM CDT	Severe Thunderstorm Warning	DMX	Adair	47 min
Jun 19, 12:27 AM CDT	Severe Thunderstorm Warning	DMX	Adams, Union	63 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.