Alert archive / Iowa / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 161, NWS Des Moines, IA

May 22, 2004Adams County, Taylor County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at May 22, 2004, 10:48 PM CDT for Adams County, Taylor County, Iowa. It was in force for 57 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 22, 2004, 10:48 PM CDT (03:48 UTC)
Expired: May 22, 2004, 11:45 PM CDT
In force: 57 min
Issued by: NWS Des Moines, IA
Area: Counties, with a storm outline in the text

Counties Adams County, IA, Taylor County, IA

The radar

The Des Moines radar (KDMX), 124 km from the middle of the area, began a volume at 03:51 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.

What was reported inside it

Time	Report	Where	Remark
May 22, 11:13 PM CDT	TSTM WND DMG	7 N Prescott, IA	TREES DOWN ON TRAILER HOUSE. GRAIN BINS DOWN.
May 22, 11:39 PM CDT	TSTM WND DMG	2 N Lenox, IA	POWER LINES DOWN. BUILDING AND BARN DAMAGE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this severe thunderstorm warning; the first came 25 minutes after it went out.

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
May 22, 6:15 PM CDT	Tornado Watch	SPC	6 hr
May 22, 10:40 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 3.8 hours before the alert went out and 144 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: 2882 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1091 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 260 m²/s²
Significant tornado parameter: 4.2
Supercell composite: 16.7

Open this sounding in Storm Lab

The text

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

230 
WUUS53 KDMX 230348
SVRDMX
IAC003-173-230445-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1048 PM CDT SAT MAY 22 2004

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ADAMS COUNTY IN SOUTHWEST IOWA
  TAYLOR COUNTY IN SOUTHWEST IOWA

* UNTIL 1145 PM CDT

* AT 1046 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 8 MILES NORTH OF CARBON TO 11
  MILES SOUTHWEST OF NEW MARKET...OR FROM 71 MILES SOUTHWEST OF DES
  MOINES TO 100 MILES SOUTHWEST OF DES MOINES...MOVING EAST AT 45
  MPH.

* SEVERE THUNDERSTORMS WILL BE...

  NEAR CORNING AROUND 1055 PM...
  NEAR PRESCOTT AROUND 1100 PM AND
  NEAR LENOX AROUND 1105 PM.

DAMAGING WINDS OF 60 TO 70 MILES AN HOUR ARE LIKELY IN THE WARNED
AREA.

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

A TORNADO WATCH REMAINS IN EFFECT FOR THE AREA. REMEMBER...SEVERE
THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO WARNING.

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT SUNDAY MORNING FOR
IOWA.

LAT...LON 4115 9493 4090 9493 4059 9490 4060 9450
          4089 9450 4115 9450

$$

KULA

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 22, 2:09 PM CDT, 8 hours 39 minutes earlier.

Area forecast discussion, May 22, 2:09 PM CDT, 8 hours 39 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DES MOINES IA
209 PM CDT SAT MAY 22 2004

.DISCUSSION...
MAIN CONCERNS FOR EARLY IN THE FORECAST PERIOD WILL BE CONVECTION
THROUGH MONDAY. TODAY OUTFLOW BOUNDARY FROM MORNING CONVECTION
BEGINNING TO ERODE OVER NORTHERN MISSOURI WITH A MORE SOUTHERLY PUSH
BECOMING APPARENT. NEXT IN ROUND OF SHORTWAVES NOW ENTERING MIDWEST.
STATIONARY BOUNDARY OVER NORTHERN IOWA BEGINNING TO SAG SOUTH WITH
BOUNDARIES PRIMED TO CONVERGE. EXPLOSIVE THUNDERSTORM DEVELOPMENT
APPEARS LIKELY AND FROM 18Z OAX SOUNDING...CAP IS ERODING.
SUPERCELLS ARE LIKELY WITHIN THE FIRST SEVERAL HOURS OF INITIATION
LATE THIS AFTERNOON AND EVENING. LARGE HAIL AND TORNADOES WILL BE
THE MAIN THREATS EARLY ON. HEAVY RAIN WILL BE A CONCERN WITH THE
POSSIBILITY OF TRAINING STORMS EARLY. 65-70KT 850MB JET CRANKS UP
TONIGHT WITH GOOD CONVERGENCE OVER IOWA AND PLENTY OF MOISTURE FEED.
CONVECTION SHOULD FORM INTO AN MCS AND TRAVEL ACROSS THE
NORTHWESTERN 2/3 OF THE FORECAST AREA. WIDESPREAD 1-2 INCH AMOUNTS
LIKELY WITH LOCALLY HEAVIER POSSIBLE.  LOW TRACKS ACROSS CNTRL IA
SUNDAY...POSSIBLE THUNDERSTORMS DEVELOPING ALONG COLD FRONT ACROSS
EAST. MORE THUNDERSTORMS EXPECTED MONDAY AS NEXT SYSTEM ARRIVES.

ACTIVITY FINALLY COMES TO AN END BY TUESDAY WITH COOLER AND DRY
CONDITIONS EXPECTED. KEPT NEXT CHANCE FOR PRECIPITATION FRIDAY.
ENSEMBLES NOT IN AGREEMENT ON SHORTWAVE TOWARDS THE END OF THE WEEK
AND REMAIN CONSISTENT FOR END OF EXTENDED PERIOD.

&&

.DMX WATCHES/WARNINGS/ADVISORIES...FLOOD WATCH TONIGHT NORTH OF
INTERSTATE 80.

&&

DONAVON

Hazardous weather outlook, May 22, 3:27 PM CDT, 7 hours 21 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
327 PM CDT SAT MAY 22 2004

IAZ004>007-015>017-024>028-036>039-048>050-060>062-231100-
BLACK HAWK-BREMER-BUTLER-CERRO GORDO-EMMET-FRANKLIN-GRUNDY-HAMILTON-
HANCOCK-HARDIN-HUMBOLDT-JASPER-KOSSUTH-MARSHALL-PALO ALTO-POLK-
POWESHIEK-STORY-TAMA-WINNEBAGO-WORTH-WRIGHT-
327 PM CDT SAT MAY 22 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MUCH OF CENTRAL AND NORTHERN
IOWA...NORTH AND EAST OF A LINE FROM EMMETSBURG...TO DES MOINES...TO
GRINNELL.

.DAY ONE...TONIGHT

THERE IS A MODERATE RISK OF SEVERE WEATHER FROM 6 PM TONIGHT
THROUGH THE REST OF THE NIGHT.  THREATS INCLUDE VERY LARGE HAIL AND
DAMAGING STRAIGHT LINE WINDS. ISOLATED TORNADOES ARE ALSO POSSIBLE
DURING THE EVENING HOURS. FLASH FLOODING IS ALSO POSSIBLE...
ESPECIALLY ACROSS AREAS ALONG AND NORTH OF HIGHWAY 20 THAT WERE HARD
HIT BY RECENT RAINS. ISOLATED 3 TO 5 INCH RAINFALL TOTALS ARE
POSSIBLE BY SUNDAY MORNING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

A THUNDERSTORM COMPLEX...WITH SOME EMBEDDED SEVERE
THUNDERSTORMS POSSIBLE...WILL LIKELY BE ONGOING EARLY SUNDAY
MORNING. SEVERE WEATHER IS POSSIBLE AGAIN SUNDAY AFTERNOON AND
MONDAY AFTERNOON AND NIGHT.

.SPOTTER ACTIVATION STATEMENT...

SPOTTER ACTIVATION WILL BE NEEDED TONIGHT FOR BOTH SEVERE WEATHER AND
FLOODING REPORTS. SPOTTER ACTIVATION MAY ALSO BE NEEDED AGAIN ON
SUNDAY AND MONDAY.

IAZ023-033>035-044>047-057>059-231100-
AUDUBON-BOONE-CALHOUN-CARROLL-CRAWFORD-DALLAS-GREENE-GUTHRIE-
POCAHONTAS-SAC-WEBSTER-
327 PM CDT SAT MAY 22 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR A PORTION OF WEST
CENTRAL INTO CENTRAL IOWA...ALONG AND WEST OF A LINE FROM AUDUBON...
TO PERRY...TO POCAHONTAS.

.DAY ONE...TONIGHT

THERE IS A MODERATE RISK OF SEVERE WEATHER FROM 600 PM THROUGH
THE NIGHT. THREATS INCLUDE VERY LARGE HAIL AND DAMAGING STRAIGHT LINE
WINDS. CONDITIONS ARE ALSO VERY FAVORABLE FOR TORNADOES DURING THE
EVENING. FLASH FLOODING IS ALSO POSSIBLE...ESPECIALLY ACROSS AREAS
ALONG AND NORTH OF HIGHWAY 20 THAT WERE HARD HIT BY RECENT RAINS.
ISOLATED 3 TO 5 INCH RAINFALL TOTALS ARE POSSIBLE BY SUNDAY MORNING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

SEVERE THUNDERSTORMS ARE POSSIBLE MONDAY AFTERNOON AND NIGHT.

.SPOTTER ACTIVATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED TONIGHT FOR BOTH SEVERE
WEATHER AND FLOODING REPORTS. SPOTTER ACTIVATION MAY ALSO BE NEEDED
MONDAY AFTERNOON AND NIGHT.

IAZ073>075-084>086-092>097-231100-
APPANOOSE-DAVIS-DECATUR-LUCAS-MAHASKA-MARION-MONROE-RINGGOLD-TAYLOR-
WAPELLO-WARREN-WAYNE-
327 PM CDT SAT MAY 22 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MUCH OF SOUTHERN IOWA.

.DAY ONE...TONIGHT

THERE IS A MODERATE RISK OF SEVERE WEATHER FROM 600 PM TONIGHT
THROUGH THE REST OF THE NIGHT.  THREATS INCLUDE VERY LARGE HAIL AND
DAMAGING STRAIGHT LINE WINDS.  CONDITIONS ARE ALSO FAVORABLE FOR
STRONG TORNADOES.  EVENING HOURS. ISOLATED FLASH FLOODING CANNOT BE
RULED OUT...BUT IS NOT LIKELY.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

SEVERE THUNDERSTORMS ARE POSSIBLE SUNDAY AFTERNOON AND AGAIN
MONDAY AFTERNOON AND NIGHT.

.SPOTTER ACTIVATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TONIGHT. SPOTTER ACTIVATION MAY ALSO
BE NEEDED AGAIN ON SUNDAY AFTERNOON AND MONDAY.

IAZ070>072-081>083-231100-
ADAIR-ADAMS-CASS-CLARKE-MADISON-UNION-
327 PM CDT SAT MAY 22 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR A PORTION OF SOUTHERN IOWA.

.DAY ONE...TONIGHT

THERE IS A MODERATE RISK OF SEVERE WEATHER FROM 600 PM THIS
EVENING THROUGH THE REST OF THE NIGHT.  THREATS INCLUDE VERY LARGE
HAIL AND DAMAGING STRAIGHT LINE WINDS. CONDITIONS ARE ALSO VERY
FAVORABLE FOR STRONG TORNADOES DURING THE EVENING. ISOLATED FLASH
FLOODING CANNOT BE RULED OUT...BUT IS NOT LIKELY.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

SEVERE WEATHER IS POSSIBLE MONDAY AFTERNOON AND NIGHT.

.SPOTTER ACTIVATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED TONIGHT. SPOTTER ACTIVATION
MAY ALSO BE NEEDED MONDAY AFTERNOON AND NIGHT.

In the hours before

Local storm report, May 22, 10:10 PM CDT, 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1010 PM CDT SAT MAY 22 2004

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

0950 PM     FLASH FLOOD      8 W AUDUBON             41.72N 95.08W
05/22/2004                   AUDUBON            IA   LAW ENFORCEMENT

            FLOODING 7-8 MI WEST OF AUDUBON AROUND FISCUS.

&&

DR

Local storm report, May 22, 10:14 PM CDT, 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1014 PM CDT SAT MAY 22 2004

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

1012 PM     HAIL             4 NE TRAER              42.23N 92.41W
05/22/2004  1.00 INCH        TAMA               IA   TRAINED SPOTTER

            QUARTER SIZED HAIL 4 MILES NE OF TRAER

&&

DR

Local storm report, May 22, 10:21 PM CDT, 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1021 PM CDT SAT MAY 22 2004

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

1008 PM     TSTM WND GST     8 W ATLANTIC            41.40N 95.17W
05/22/2004  62 MPH           POTTAWATTAMIE      IA   EMERGENCY MNGR

            62 MPH WINDS MEASURED 8 MI WEST OF ATLANTIC

&&

DR

Local storm report, May 22, 10:23 PM CDT, 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1023 PM CDT SAT MAY 22 2004

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

1015 PM     HAIL             ALLEMAN                 41.82N 93.61W
05/22/2004  0.88 INCH        POLK               IA   STORM CHASER

            NICKEL SIZED HAIL IN ALLEMAN

&&

DR

Local storm report, May 22, 10:36 PM CDT, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1036 PM CDT SAT MAY 22 2004

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

1030 PM     HEAVY RAIN       9 E PERRY               41.84N 93.93W
05/22/2004  4.00 INCH        DALLAS             IA   LAW ENFORCEMENT

            4 INCHES OF RAIN MEASURED 9 MI EAST OF PERRY. WATER OVER
            HIGHWAYS 210 AND 141. RAINFALL AMOUNTS 3 TO 4 INCHES OVER
            MUCH OF THE AREA AND STILL RAINING.

&&

DR

Local storm report, May 22, 10:39 PM CDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1039 PM CDT SAT MAY 22 2004

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

1006 PM     HAIL             TRAER                   42.19N 92.46W
05/22/2004  1.75 INCH        TAMA               IA   BROADCAST MEDIA

            TV9 SPOTTER REPORTS GOLF BALL SIZED HAIL AND FLOODING
            EAST SIDE OF TRAER NEAR HIGHWAY 8.

&&

DR

The office that day

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

Issued	Product	Office	Counties	Lasted
May 22, 7:00 PM CDT	Tornado Warning	DMX	Adair	30 min
May 22, 7:01 PM CDT	Tornado Warning	DMX	Adair	29 min
May 22, 7:04 PM CDT	Severe Thunderstorm Warning	DMX	Audubon	26 min
May 22, 7:06 PM CDT	Tornado Warning	DMX	Polk, Story	54 min
May 22, 7:10 PM CDT	Tornado Warning	DMX	Dallas, Guthrie	50 min
May 22, 7:13 PM CDT	Flash Flood Warning	DMX	Boone, Story	92 min
May 22, 7:14 PM CDT	Tornado Warning	DMX	Audubon	31 min
May 22, 7:14 PM CDT	Tornado Warning	DMX	Greene, Guthrie	46 min
May 22, 7:23 PM CDT	Tornado Warning	DMX	Madison	37 min
May 22, 7:31 PM CDT	Tornado Warning	DMX	Guthrie	44 min
May 22, 7:49 PM CDT	Tornado Warning	DMX	Jasper, Marshall	56 min
May 22, 7:51 PM CDT	Tornado Warning	DMX	Dallas	39 min
May 22, 7:57 PM CDT	Tornado Warning	DMX	Story	33 min
May 22, 8:18 PM CDT	Tornado Warning	DMX	Polk	57 min
May 22, 8:21 PM CDT	Flash Flood Warning	DMX	Audubon, Boone, Carroll, Dallas, Greene, Guthrie and 4 more	16 hr
May 22, 8:29 PM CDT	Tornado Warning	DMX	Dallas	16 min
May 22, 8:31 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Guthrie	44 min
May 22, 8:41 PM CDT	Tornado Warning	DMX	Tama	49 min
May 22, 8:43 PM CDT	Tornado Warning	DMX	Marshall	47 min
May 22, 9:09 PM CDT	Tornado Warning	DMX	Polk, Story	36 min
May 22, 9:14 PM CDT	Tornado Warning	DMX	Dallas	31 min
May 22, 9:16 PM CDT	Severe Thunderstorm Warning	DMX	Audubon	44 min
May 22, 9:27 PM CDT	Tornado Warning	DMX	Marshall, Tama	63 min
May 22, 9:31 PM CDT	Flash Flood Warning	DMX	Tama	15 hr
May 22, 10:00 PM CDT	Severe Thunderstorm Warning	DMX	Cass	45 min
May 22, 10:14 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk	46 min
May 22, 10:22 PM CDT	Flash Flood Warning	DMX	Black Hawk	16 hr
May 22, 10:23 PM CDT	Severe Thunderstorm Warning	DMX	Polk, Story	52 min
May 22, 10:24 PM CDT	Severe Thunderstorm Warning	DMX	Adair	36 min
May 22, 10:46 PM CDT	Severe Thunderstorm Warning	DMX	Cass	29 min
May 22, 10:55 PM CDT	Severe Thunderstorm Warning	DMX	Guthrie	50 min
May 22, 10:57 PM CDT	Severe Thunderstorm Warning	DMX	Adair	48 min
May 22, 11:09 PM CDT	Severe Thunderstorm Warning	DMX	Madison, Ringgold, Union	51 min
May 22, 11:20 PM CDT	Severe Thunderstorm Warning	DMX	Dallas	55 min
May 22, 11:31 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Decatur	44 min
May 22, 11:36 PM CDT	Severe Thunderstorm Warning	DMX	Polk, Warren	54 min
May 22, 11:54 PM CDT	Tornado Warning	DMX	Warren	36 min
May 23, 12:07 AM CDT	Tornado Warning	DMX	Jasper, Marion	53 min
May 23, 12:22 AM CDT	Severe Thunderstorm Warning	DMX	Lucas	23 min
May 23, 12:35 AM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Poweshiek	55 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2004 Every severe thunderstorm warning in 2004

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.