Alert archive / Iowa / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 183, NWS Des Moines, IA

June 22, 2007Warren County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 22, 2007, 5:29 PM CDT for Warren County, Iowa. It was in force for 31 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 22, 2007, 5:29 PM CDT (22:29 UTC)
Expired: Jun 22, 2007, 6:00 PM CDT
In force: 31 min
Issued by: NWS Des Moines, IA
Area: Counties, with a storm outline in the text

County Warren County, IA

The radar

The Des Moines radar (KDMX), 48 km from the middle of the area, began a volume at 22:31 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 22, 1:49 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.5 hours before the alert went out and 237 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: 236 J/kg
Mixed-layer CIN: -370 J/kg
Mixed-layer LCL: 1448 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 13 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 222229
SVRDMX
IAC181-222315-
/O.NEW.KDMX.SV.W.0183.070622T2229Z-070622T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
529 PM CDT FRI JUN 22 2007

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WARREN COUNTY IN SOUTH CENTRAL IOWA...

* UNTIL 615 PM CDT

* AT 526 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS
  IN EXCESS OF 70 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 7 MILES NORTHEAST OF INDIANOLA TO 15 MILES SOUTHWEST
  OF INDIANOLA...OR ALONG A LINE EXTENDING FROM 12 MILES SOUTHEAST OF
  DES MOINES TO 28 MILES SOUTH OF DES MOINES...AND MOVING EAST AT 25
  MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  SANDYVILLE AND MILO BY 540 PM CDT...
  LACONA BY 555 PM CDT...

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 44 AND 64.

MOVE TO AN INTERIOR ROOM AND STAY AWAY FROM WINDOWS. IF YOU LIVE IN A
MOBILE HOME...SEEK SHELTER IN A STURDY BUILDING.

GO TO A BASEMENT OR SMALL INTERIOR ROOM. EXTENSIVE DAMAGE IS LIKELY.
EVACUATE MOBILE HOMES...AND SEEK SHELTER IN A STURDY BUILDING. SEVERE
STRAIGHT LINE WINDS CAN SOUND LIKE A TORNADO...AND PRODUCE SIMILAR
DAMAGE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT FRIDAY
EVENING FOR IOWA.

THIS STORM HAS A HISTORY OF PRODUCING WIDESPREAD WIND DAMAGE ACROSS.

LAT...LON 4116 9380 4148 9380 4147 9334 4146 9334
      4140 9333 4116 9334

$$

DONAVON

1 follow-up statement

000 
WWUS53 KDMX 222300 RRA
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
601 PM CDT FRI JUN 22 2007

IAC181-222311-
/O.CAN.KDMX.SV.W.0183.000000T0000Z-070622T2315Z/
WARREN IA-
601 PM CDT FRI JUN 22 2007

...THE SEVERE THUNDERSTORM WARNING FOR WARREN COUNTY IS CANCELLED...

AT 556 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE
THUNDERSTORMS WHICH PROMPTED THE WARNING HAVE EITHER WEAKENED OR
MOVED OUT OF THE AREA...AND NO LONGER POSE AN IMMEDIATE THREAT TO
LIFE OR PROPERTY. THEREFORE...THE SEVERE THUNDERSTORM WARNING HAS
BEEN CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT FRIDAY
EVENING FOR IOWA.

LAT...LON 4116 9380 4148 9380 4147 9334 4146 9334
      4140 9333 4116 9334

$$

DONAVON

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, 11:45 PM CDT, 17 hours 44 minutes earlier.

Area forecast discussion, Jun 21, 11:45 PM CDT, 17 hours 44 minutes before

AREA FORECAST DISCUSSION...UPDATED AVIATION SECTION
NATIONAL WEATHER SERVICE DES MOINES IA
1145 PM CDT THU JUN 21 2007

.DISCUSSION...
MAIN FOCUS IS ON SEVERE WEATHER IN SHORT TERM HOWEVER FOR FRIDAY
AFTER TODAYS RAIN MAY BECOME NECESSARY TO ISSUE FFA ON FRIDAY.
ATTM MCS ROLLING DOWN NORTHWESTERLY FLOW AND WITH HELP OF VERY
UNSTABLE AIRMASS AND PLENTY OF CAPE AS WELL AS SEVERAL OUTFLOW
BOUNDARIES PRODUCING SEVERE WEATHER IN FORM OF LARGE HAIL.  TONIGHT
AS SHORTWAVE MOVES DOWN THE RIDGE WILL FURTHER ENHANCE DEVELOPMENT
WITH LIKELIHOOD OF HEAVY RAIN THOUGH AREA OF HEAVY RAIN MAY BE
SMALL.  GUIDANCE WOULD SUGGEST FIRST ROUND OF RAIN CAN BE TAKEN
EASILY WITHOUT LIMITED PROBLEMS IT WILL BE SECOND ROUND TOMORROW
THAT MAY BRING ABOUT FLASH FLOODING.  ON FRIDAY THINGS RELOAD AND
UPPER LOW WILL DRIFT ACROSS THE AREA TO TRIGGER DEVELOPMENT.  WONDER
ON FRIDAY HOW MUCH MODELS ARE GETTING CHOKED ON FEEDBACK THOUGH WITH
PWS IN 1.7-2.2 WILL FURTHER AID HEAVY RAIN PROCESSES.  LATEST MODEL
RUNS HAVE CONTINUED TO TREND MUCH SLOWER WITH RAIN NOW LINGERING FOR
DAY ON SATURDAY.  AFTER SATURDAY LONG TERM MODELS FORECAST UPPER
RIDGE TO AMPLIFY AND WESTERLIES HEAD NORTH WITH ONLY SMALL CHANCES
FOR ANY RAIN LATE IN THE PERIOD AS SEVERAL WEAK VORTS SLIP UNDER THE
RIDGE.  BELIEVE THIS FORECAST TO BE MOSTLY DRY THOUGH HAVE LEFT
SLIGHT CHANCES IN DAYS 6 AND 7.  EXPECT TEMPERATURES TO REMAIN VERY
SUMMER LIKE WITH HIGHS AROUND 90.

&&

.AVIATION 22/06Z...

DIFFICULT FORECASTING CEILING AND THUNDERSTORM TRENDS WITH SURFACE
BOUNDARY REMAINING NEARLY STATIONARY FROM SE IA INTO W CNTRL IA.
THUNDERSTORMS ARE MOST LIKELY TO THE NORTH OF THIS BOUNDARY. BETWEEN
CONVECTIVE COMPLEX EXITING IL AND THE NEXT ONE OVER NEBRASKA...COULD
BE ENOUGH CLEAR SKIES TO ALLOW VSBY TO DROP BRIEFLY IN FOG OR HAZE.
VFR SHOWERS ARE LIKELY TO PRECEDE A PERIOD OF EMBEDDED THUNDERSTORMS
AND MVFR CONDITIONS CENTERED IN THE 09-12Z TIME FRAME. SHOULD BE A
BREAK DURING THE MORNING WITH QUICK AND FAIRLY WIDESPREAD AFTERNOON
DEVELOPMENT CENTERED ON THE REMAINING BOUNDARY EXACT LOCATION OF
WHICH WILL BE PINNED DOWN IN LATER UPDATES.

&

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

&&

LONG TERM...FORSTER
AVIATION...JUNGBLUTH

Hazardous weather outlook, Jun 22, 1:40 PM CDT, 3 hours 49 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE DES MOINES IA
140 PM CDT FRI JUN 22 2007

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>086-092>097-231045-
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-
140 PM CDT FRI JUN 22 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ALL OF CENTRAL IOWA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

THUNDERSTORM DEVELOPMENT IS LIKELY THIS AFTERNOON. SOME SEVERE
STORMS WILL BE LIKELY WITH HAIL TO AN INCH IN DIAMETER AND WIND
GUSTS OF 60 MPH POSSIBLE. ALTHOUGH QUITE UNLIKELY...A BRIEF TORNADO
TOUCH DOWN IS A POSSIBILITY. THE CHANCE FOR SEVERE THUNDERSTORMS
WILL END BY AROUND MIDNIGHT...HOWEVER LOCALLY HEAVY RAINFALL WILL BE
POSSIBLE SOUTHEAST OF A WATERLOO TO BEDFORD LINE.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

SCATTERED THUNDERSTORMS...MAINLY SATURDAY MORNING...CAN BE
EXPECTED SOUTHEAST OF A MASON CITY TO ATLANTIC LINE. THE NEXT
CHANCE FOR THUNDERSTORMS WILL BE ON TUESDAY NIGHT ACROSS MUCH OF
THE STATE.  AT THIS TIME IT IS TOO EARLY TO DETERMINE SEVERITY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE POSSIBLE IN THE OUTLOOK AREA THROUGH
MIDNIGHT.

In the hours before

Local storm report, Jun 22, 5:06 PM CDT, 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
506 PM CDT FRI JUN 22 2007

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

0440 PM     TORNADO          NORWALK                 41.50N 93.68W
06/22/2007                   WARREN             IA   LAW ENFORCEMENT

            HOMES DAMAGED IN NORWALK.

&&

SEARCY

Local storm report, Jun 22, 5:07 PM CDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
507 PM CDT FRI JUN 22 2007

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

0459 PM     TSTM WND DMG     DES MOINES              41.58N 93.62W
06/22/2007                   POLK               IA   TRAINED SPOTTER

            LARGE TREE LIMBS BEING BLOWN DOWN AT THIS TIME IN THE
            VICINITY OF WATERWORKS.

&&

SEARCY

Local storm report, Jun 22, 5:09 PM CDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
509 PM CDT FRI JUN 22 2007

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

0454 PM     FLASH FLOOD      2 N HUBBARD             42.33N 93.30W
06/22/2007                   HARDIN             IA   LAW ENFORCEMENT

            TIPTON CREEK...2 MILES NORTH OF HUBBARD...OUT OF ITS
            BANKS AND RUNNING OVER HIGHWAY 65. ONE CAR WITH WATER UP
            TO BOTTOM OF CAR DOORS.

&&

PODRAZIK

Local storm report, Jun 22, 5:14 PM CDT, 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
514 PM CDT FRI JUN 22 2007

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

0459 PM     TSTM WND DMG     DES MOINES              41.58N 93.62W
06/22/2007                   POLK               IA   TRAINED SPOTTER

            LARGE TREE LIMB FELL ON GARAGE AND LIMBS BLOCKED ROAD ON
            22ND ST AND ASHWORTH.

&&

STEACHOU

Local storm report, Jun 22, 5:16 PM CDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
516 PM CDT FRI JUN 22 2007

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

0435 PM     TORNADO          CUMMING                 41.48N 93.76W
06/22/2007                   WARREN             IA   AMATEUR RADIO

            DAMAGE REPORTS FROM TORNADO..IN CUMMING ... METAL
            BUILDING SIDING TORN OFF ... GARAGE DESTROYED ... POWER
            LINES DOWNED ... I-35 EXIT TO CUMMING IS CLOSED DUE TO
            RESIDENCE PROPANE TANK PUNCTURED ... NUMEROUS TREES UP TO
            1 1/2 FT DIAMETER AND 30 FT TALL DOWNED

&&

SEARCY

Local storm report, Jun 22, 5:25 PM CDT, 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
525 PM CDT FRI JUN 22 2007

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

0447 PM     TORNADO          NORWALK                 41.50N 93.68W
06/22/2007                   WARREN             IA   AMATEUR RADIO

            TORNADO DAMAGE ... NUMEROUS HOUSES HAVE ROOF DAMAGE ...
            NUMEROUS TREE LIMBS UP 10 INCHES DIAMETER BROKEN ...
            CASEYS GENERAL STORE LOST CANOPY AND SIGN

&&

SEARCY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 7:37 PM CDT	Severe Thunderstorm Warning	DMX	Davis	39 min
Jun 22, 1:21 PM CDT	Severe Thunderstorm Warning	DMX	Carroll	39 min
Jun 22, 1:30 PM CDT	Severe Thunderstorm Warning	DMX	Boone	45 min
Jun 22, 1:43 PM CDT	Severe Thunderstorm Warning	DMX	Greene	47 min
Jun 22, 1:50 PM CDT	Tornado Warning	DMX	Boone	40 min
Jun 22, 1:57 PM CDT	Severe Thunderstorm Warning	DMX	Dallas	48 min
Jun 22, 2:07 PM CDT	Tornado Warning	DMX	Dallas	23 min
Jun 22, 2:19 PM CDT	Tornado Warning	DMX	Franklin, Wright	26 min
Jun 22, 2:25 PM CDT	Severe Thunderstorm Warning	DMX	Greene	50 min
Jun 22, 2:29 PM CDT	Tornado Warning	DMX	Dallas, Polk	31 min
Jun 22, 2:32 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Story	25 min
Jun 22, 2:40 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Polk	50 min
Jun 22, 3:12 PM CDT	Severe Thunderstorm Warning	DMX	Polk	28 min
Jun 22, 3:37 PM CDT	Flash Flood Warning	DMX	Dallas, Polk	6 hr
Jun 22, 3:37 PM CDT	Flash Flood Warning	DMX	Dallas, Guthrie, Polk	6 hr
Jun 22, 3:58 PM CDT	Severe Thunderstorm Warning	DMX	Guthrie	47 min
Jun 22, 4:03 PM CDT	Severe Thunderstorm Warning	DMX	Dallas	30 min
Jun 22, 4:11 PM CDT	Severe Thunderstorm Warning	DMX	Madison	49 min
Jun 22, 4:14 PM CDT	Severe Thunderstorm Warning	DMX	Polk, Warren	46 min
Jun 22, 4:20 PM CDT	Flash Flood Warning	DMX	Franklin, Hamilton, Hardin, Wright	6 hr
Jun 22, 4:24 PM CDT	Flash Flood Warning	DMX	Butler, Grundy	6 hr
Jun 22, 4:30 PM CDT	Tornado Warning	DMX	Warren	30 min
Jun 22, 4:42 PM CDT	Flash Flood Warning	DMX	Polk	6 hr
Jun 22, 4:59 PM CDT	Tornado Warning	DMX	Warren	31 min
Jun 22, 5:01 PM CDT	Severe Thunderstorm Warning	DMX	Polk	44 min
Jun 22, 5:08 PM CDT	Severe Thunderstorm Warning	DMX	Lucas, Marion, Monroe	52 min
Jun 22, 5:10 PM CDT	Flash Flood Warning	DMX	Marshall	6 hr
Jun 22, 5:15 PM CDT	Severe Thunderstorm Warning	DMX	Madison	30 min
Jun 22, 5:18 PM CDT	Severe Thunderstorm Warning	DMX	Adair	42 min
Jun 22, 5:25 PM CDT	Flash Flood Warning	DMX	Tama	6 hr
Jun 22, 5:36 PM CDT	Flash Flood Warning	DMX	Adair, Madison	6 hr

Nearby

Severe Thunderstorm Warnings in Iowa, 2007 Every severe thunderstorm warning in 2007

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.