Tornado Chaos

WGUS53 KDVN 241536
FFWDVN
IAC055-105-242345-
/O.EXT.KDVN.FF.W.0051.000000T0000Z-100724T2345Z/
/00000.3.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN – EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1036 AM CDT SAT JUL 24 2010

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS EXTENDED THE

* FLASH FLOOD WARNING FOR HARTWICK OR LAKE DELHI DAM DAM ON THE
MAQUOKETA RIVER IN…DELAWARE COUNTY IOWA

* UNTIL 645 PM CDT SATURDAY

* AT 1029 AM CDT…THE FAILURE OF THE HATWICK OR LAKE DELHI DAM
HAS BEEN REPORTED BY EMERGENCY MANAGEMENT OFFICIALS IN DELAWARE
COUNTY.

MORE WATER HAS BEEN REPORTED GOING OVER THE BERM ALONGSIDE THE
DAM…AND THE COMPLETE EROSION OF THE BERM IS ONGOING.

MORE INFORMATION IS FORTHCOMING…BUT WORST CASE SCENARIO…
IN HOPKINTON THE FLOODING MAY AFFECT MUCH OF THE TOWN FROM THE RIVER
UP TO 3RD STREET OR HIGHWAY 38…AND SHOULD CREST AROUND 1130 AM.

IN MONTICELLO…A WORST CASE SCENARIO WOULD BE FOR FLOOD WATERS TO
AFFECT THE TOWN FROM THE RIVER UP TO HIGHWAY 38…AND SHOULD CREST
AROUND 4 PM THIS AFTERNOON.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE…TURN AROUND…DONT DROWN.

&&

LAT…LON 4246 9119 4229 9114 4221 9089 4207 9090
4214 9118 4242 9141

$$
LE

WUUS53 KDMX 240005
SVRDMX
IAC049-153-240045-
/O.NEW.KDMX.SV.W.0282.100724T0005Z-100724T0045Z/

BULLETIN – IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
705 PM CDT FRI JUL 23 2010

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR…
NORTHEASTERN DALLAS COUNTY IN CENTRAL IOWA…
NORTHWESTERN POLK COUNTY IN CENTRAL IOWA…

* UNTIL 745 PM CDT

* AT 703 PM CDT…NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL…AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
DALLAS CENTER…OR 17 MILES NORTHWEST OF DES MOINES…AND MOVING
NORTHEAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE…
CLIVE…GRIMES…URBANDALE…JOHNSTON…POLK CITY…GRANGER…
SAYLORVILLE LAKE AND ALLEMAN.

THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 121 AND 129.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

MOVE TO AN INTERIOR ROOM AND STAY AWAY FROM WINDOWS. IF YOU ARE IN A
MOBILE HOME…GET OUT NOW…AND SEEK SHELTER IN A REINFORCED
BUILDING.

PREPARE FOR DAMAGING WINDS…FALLING TREES AND FLYING DEBRIS. MOVE
INDOORS AND STAY AWAY FROM WINDOWS. IF YOU ARE IN A MOBILE HOME…
SEEK SHELTER IN A REINFORCED BUILDING.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM…AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS. TURN AROUND DON’T DROWN.

&&

LAT…LON 4186 9389 4186 9356 4157 9379 4165 9403
TIME…MOT…LOC 0005Z 226DEG 21KT 4168 9390
WIND…HAIL 60MPH 1.00IN

$$

VACHALEK

Severe Weather Alert from Iowa-Skywarn.org

WUUS53 KDMX 240003
SVRDMX
IAC049-121-240045-
/O.NEW.KDMX.SV.W.0281.100724T0003Z-100724T0045Z/

BULLETIN – IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
703 PM CDT FRI JUL 23 2010

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR…
SOUTHEASTERN DALLAS COUNTY IN CENTRAL IOWA…
NORTHERN MADISON COUNTY IN SOUTH CENTRAL IOWA…

* UNTIL 745 PM CDT

* AT 658 PM CDT…NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL…AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 6 MILES
SOUTHEAST OF EARLHAM…OR 24 MILES SOUTHWEST OF DES MOINES…AND
MOVING NORTHEAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE…
DE SOTO…ADEL AND VAN METER.

THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 104 AND 121.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

MOVE TO AN INTERIOR ROOM AND STAY AWAY FROM WINDOWS. IF YOU ARE IN A
MOBILE HOME…GET OUT NOW…AND SEEK SHELTER IN A REINFORCED
BUILDING.

PREPARE FOR DAMAGING WINDS…FALLING TREES AND FLYING DEBRIS. MOVE
INDOORS AND STAY AWAY FROM WINDOWS. IF YOU ARE IN A MOBILE HOME…
SEEK SHELTER IN A REINFORCED BUILDING.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM…AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS. TURN AROUND DON’T DROWN.

&&

LAT…LON 4132 9402 4145 9419 4166 9402 4158 9379
4149 9380
TIME…MOT…LOC 0003Z 228DEG 22KT 4145 9401
WIND…HAIL 60MPH 1.00IN

$$

VACHALEK

Severe Weather Alert from Iowa-Skywarn.org

WWUS63 KDMX 230048
WCNDMX

WATCH COUNTY NOTIFICATION FOR WATCH 515
NATIONAL WEATHER SERVICE DES MOINES IA
748 PM CDT THU JUL 22 2010

IAC025-091-151-161-197-230200-
/O.CAN.KDMX.SV.A.0515.000000T0000Z-100723T0300Z/

THE NATIONAL WEATHER SERVICE HAS CANCELLED SEVERE THUNDERSTORM
WATCH 515 FOR THE FOLLOWING AREAS

IN IOWA THIS CANCELS 5 COUNTIES

IN NORTH CENTRAL IOWA

HUMBOLDT WRIGHT

IN NORTHWEST IOWA

POCAHONTAS

IN WEST CENTRAL IOWA

CALHOUN SAC

THIS INCLUDES THE CITIES OF…EAGLE GROVE…HUMBOLDT…
POCAHONTAS…ROCKWELL CITY AND SAC CITY.

$$

IAC001-009-013-015-017-023-027-029-047-049-069-073-075-077-079-
083-099-121-123-125-127-153-157-169-171-181-187-230300-
/O.CON.KDMX.SV.A.0515.000000T0000Z-100723T0300Z/

SEVERE THUNDERSTORM WATCH 515 REMAINS VALID UNTIL 10 PM CDT THIS
EVENING FOR THE FOLLOWING AREAS

IN IOWA THIS WATCH INCLUDES 27 COUNTIES

IN CENTRAL IOWA

BOONE DALLAS GRUNDY
HAMILTON HARDIN JASPER
MARSHALL POLK POWESHIEK
STORY TAMA WEBSTER

IN NORTH CENTRAL IOWA

BUTLER FRANKLIN

IN NORTHEAST IOWA

BLACK HAWK BREMER

IN SOUTH CENTRAL IOWA

MADISON MAHASKA MARION
WARREN

IN SOUTHWEST IOWA

ADAIR CASS

IN WEST CENTRAL IOWA

AUDUBON CARROLL CRAWFORD
GREENE GUTHRIE

THIS INCLUDES THE CITIES OF…ADEL…AMES…ATLANTIC…AUDUBON…
BOONE…CARROLL…DENISON…DES MOINES…FORT DODGE…
GREENFIELD…GRINNELL…GRUNDY CENTER…GUTHRIE CENTER…
HAMPTON…INDIANOLA…IOWA FALLS…JEFFERSON…KNOXVILLE…
MARSHALLTOWN…NEWTON…OSKALOOSA…PARKERSBURG…TAMA…
WATERLOO…WAVERLY…WEBSTER CITY AND WINTERSET.

$$

Severe Weather Alert from Iowa-Skywarn.org

WWUS63 KDMX 222050
WCNDMX

WATCH COUNTY NOTIFICATION FOR WATCH 515
NATIONAL WEATHER SERVICE DES MOINES IA
350 PM CDT THU JUL 22 2010

IAC001-009-013-015-017-023-025-027-029-047-049-069-073-075-077-
079-083-091-099-121-123-125-127-151-153-157-161-169-171-181-187-
197-230300-
/O.NEW.KDMX.SV.A.0515.100722T2050Z-100723T0300Z/

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH
515 IN EFFECT UNTIL 10 PM CDT THIS EVENING FOR THE FOLLOWING
AREAS

IN IOWA THIS WATCH INCLUDES 32 COUNTIES

IN CENTRAL IOWA

BOONE DALLAS GRUNDY
HAMILTON HARDIN JASPER
MARSHALL POLK POWESHIEK
STORY TAMA WEBSTER

IN NORTH CENTRAL IOWA

BUTLER FRANKLIN HUMBOLDT
WRIGHT

IN NORTHEAST IOWA

BLACK HAWK BREMER

IN NORTHWEST IOWA

POCAHONTAS

IN SOUTH CENTRAL IOWA

MADISON MAHASKA MARION
WARREN

IN SOUTHWEST IOWA

ADAIR CASS

IN WEST CENTRAL IOWA

AUDUBON CALHOUN CARROLL
CRAWFORD GREENE GUTHRIE
SAC

THIS INCLUDES THE CITIES OF…ADEL…AMES…ATLANTIC…AUDUBON…
BOONE…CARROLL…DENISON…DES MOINES…EAGLE GROVE…
FORT DODGE…GREENFIELD…GRINNELL…GRUNDY CENTER…
GUTHRIE CENTER…HAMPTON…HUMBOLDT…INDIANOLA…IOWA FALLS…
JEFFERSON…KNOXVILLE…MARSHALLTOWN…NEWTON…OSKALOOSA…
PARKERSBURG…POCAHONTAS…ROCKWELL CITY…SAC CITY…TAMA…
WATERLOO…WAVERLY…WEBSTER CITY AND WINTERSET.

$$

FAB

Severe Weather is ongoing early this Sunday morning with multiple Tornado Warnings in effect across north central Iowa.

Snapshot from the Des Moines /KDMX/ WSR-88D

Update at 01:38 AM: No longer have any tornado warnings in effect however the line is continuing to move southeast towards the DSM metro.

Looks like a chance for severe weather later this afternoon thanks to all the heat and humidity across the area. The storms are expected to form along a cold front that will cross the state this evening.

Digital Storm Precip data from the Des Moines, IA WSR-88D taken about 0450 hours. Note a number of Flash Flood Warnings in effect. Flood Warnings were going into effect on a number of creeks & streams in the Des Moines area due to the runoff as well.

Digital Storm Precip image from Des Moines IA WSR-88D as of about 4:30 this morning:

Snapshot from the Des Moines WSR-88D taken at about 10:20 PM