Severe Thunderstorm Warning 83, NWS Quad Cities, IA

000 
WWUS53 KDVN 242006
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
306 PM CDT FRI JUL 24 2009

IAC055-061-105-242045-
/O.CON.KDVN.SV.W.0083.000000T0000Z-090724T2045Z/
DUBUQUE IA-DELAWARE IA-JONES IA-
306 PM CDT FRI JUL 24 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM CDT
FOR NORTHERN JONES...SOUTHEASTERN DELAWARE AND SOUTHWESTERN DUBUQUE
COUNTIES...

AT 306 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE WINDS
IN EXCESS OF 70 MPH....AND GOLF BALL SIZE HAIL.  THIS STORM WAS
LOCATED APPROXIMATELY NEAR WORTHINGTON...OR 16 MILES NORTHEAST OF
ANAMOSA...MOVING SOUTHEAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  MONTICELLO MUNICIPAL AIRPORT...MONTICELLO AND CASCADE AROUND 315 PM
  CDT...
  PICTURED ROCKS WILDLIFE MANAGEMENT AREA AND 8 MILES NORTHEAST OF
  LANGWORTHY AROUND 320 PM CDT...
  TEMPLE HILL AND SCOTCH GROVE AROUND 325 PM CDT...
  JONES COUNTY PARK AROUND 330 PM CDT...
  CANTON AND CENTER JUNCTION AROUND 335 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS AN EXTREMELY DANGEROUS STORM CAPABLE OF PRODUCING
TORNADO-LIKE WINDS AND STRUCTURAL DAMAGE TO WELL BUILT BUILDINGS.
MOVE INDOORS TO A SUBSTANTIAL SHELTER SUCH AS A BASEMENT OR INTERIOR
ROOM OR HALLWAY.

THIS STORM IS ALSO PRODUCING HEAVY RAIN AND URBAN AND SMALL STREAM
FLOODING.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 PM CDT FRIDAY AFTERNOON
FOR EASTERN IOWA AND NORTHWEST ILLINOIS.

&&

LAT...LON 4221 9089 4214 9090 4213 9091 4210 9124
      4235 9129 4246 9107
TIME...MOT...LOC 2006Z 327DEG 27KT 4233 9115

$$

MCCLURE/PHILIP

000 
WWUS53 KDVN 242019
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
319 PM CDT FRI JUL 24 2009

IAC055-242027-
/O.CAN.KDVN.SV.W.0083.000000T0000Z-090724T2045Z/
DELAWARE IA-
319 PM CDT FRI JUL 24 2009

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN DELAWARE COUNTY
IS CANCELLED...

THE SEVERE THUNDERSTORM THAT WAS CAPABLE OF PRODUCING SEVERE WEATHER 
HAS MOVED OUT OF THE WARNED AREA. THEREFORE THE SEVERE THUNDERSTORM 
WARNING HAS BEEN CANCELLED.


A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 PM CDT FRIDAY AFTERNOON
FOR EASTERN IOWA AND NORTHWEST ILLINOIS.

LAT...LON 4231 9095 4220 9089 4214 9090 4213 9091
      4214 9113 4229 9116 4230 9114 4235 9114
      4236 9100
TIME...MOT...LOC 2017Z 323DEG 16KT 4226 9104

$$

IAC061-105-242045-
/O.CON.KDVN.SV.W.0083.000000T0000Z-090724T2045Z/
DUBUQUE IA-JONES IA-
319 PM CDT FRI JUL 24 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM CDT
FOR NORTHEASTERN JONES AND SOUTHWESTERN DUBUQUE COUNTIES...

AT 317 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH....AND QUARTER SIZE HAIL.  THIS STORM WAS LOCATED
APPROXIMATELY NEAR CASCADE...OR 16 MILES NORTHEAST OF ANAMOSA...
MOVING SOUTHEAST AT 20 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  TEMPLE HILL AND SCOTCH GROVE AROUND 325 PM CDT...
  CANTON AROUND 345 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. MOVE IMMEDIATELY INDOORS AND STAY AWAY
FROM WINDOWS.

THIS STORM HAS ALREADY PRODUCED WIND DAMAGE AND LARGE HAIL...AND IT 
REMAINS A THREAT.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 PM CDT FRIDAY AFTERNOON
FOR EASTERN IOWA AND NORTHWEST ILLINOIS.

&&

LAT...LON 4231 9095 4220 9089 4214 9090 4213 9091
      4214 9113 4229 9116 4230 9114 4235 9114
      4236 9100
TIME...MOT...LOC 2017Z 323DEG 16KT 4226 9104

$$

MCCLURE/PHILIP

000 
WWUS53 KDVN 242027
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
327 PM CDT FRI JUL 24 2009

IAC061-105-242036-
/O.CAN.KDVN.SV.W.0083.000000T0000Z-090724T2045Z/
DUBUQUE IA-JONES IA-
327 PM CDT FRI JUL 24 2009

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN JONES AND
SOUTHWESTERN DUBUQUE COUNTIES IS CANCELLED...

THE SEVERE THUNDERSTORM THAT HAD A HISTORY OF PRODUCING SEVERE 
WEATHER HAS WEAKENED. THEREFORE THE SEVERE THUNDERSTORM WARNING HAS 
BEEN CANCELLED.


A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 PM CDT FRIDAY AFTERNOON
FOR EASTERN IOWA AND NORTHWEST ILLINOIS.

LAT...LON 4231 9095 4220 9089 4214 9090 4213 9091
      4214 9113 4229 9116 4230 9114 4235 9114
      4236 9100
TIME...MOT...LOC 2026Z 323DEG 16KT 4223 9101

$$

MCCLURE/PHILIP

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
333 AM CDT FRI JUL 24 2009

.SYNOPSIS...
SHORTWAVE RIDGING IN NW FLOW...ALONG WITH WEAK PRESSURE GRADIENT AT
THE SURFACE AND LINGERING LOW LEVEL MOISTURE...IS PROVIDING CLEAR
SKIES AND AREAS OF FOG EARLY THIS MORNING. STRONG UPPER LOW IS
EVIDENT ON WV IMAGERY MOVING INTO SW ONTARIO WITH ATTENDANT COLD
FRONT AT THE SURFACE FROM NW MN SW INTO CENTRAL SD. RADAR MOSAIC AND
IR IMAGERY INDICATED AN MCS AHEAD OF THESE FEATURES DRIFTING SE OUT
OF N CENTRAL MN AT 08Z. THE UPPER LEVEL LOW IS PROGGED TO CONTINUE
SE INTO THE MEAN TROUGH AXIS OVER THE GREAT LAKES...SENDING THE COLD
FRONT SE THROUGH THE AREA TODAY. WARM ADVECTION AHEAD OF THE FRONT
WILL BRING BACK ONE DAY OF TYPICAL JULY HEAT AND HUMIDITY...FOLLOWED
BY WIDESPREAD THUNDERSTORMS WITH THE FROPA IN THE EVENING AND
OVERNIGHT WITH SOME POTENTIAL FOR SEVERE STORMS. OVER THE
WEEKEND...UPPER LOW OVER THE GREAT LAKES AND RESULTANT LOW LEVEL
CYCLONIC FLOW WILL RETURN TEMPERATURES TO BELOW NORMAL.

&&

.SHORT TERM...TODAY AND TONIGHT.
PRIMARY CONCERN IS POTENTIAL FOR SEVERE STORMS FROM LATE AFTERNOON
THROUGH EVENING AS COLD FRONT PUSHES SOUTHEAST THROUGH THE AREA.

IN IMMEDIATE SHORT TERM...WIDESPREAD FOG AND LOCAL DENSE FOG SHOULD
BURN OFF WITHIN A COUPLE HOURS OF SUNSHINE AND HAVE EXTENDED MENTION
INTO THE EARLY DAY PERIOD.

SHORT TERM MODELS FAIRLY CONSISTENT BRINGING INTO THE CWFA THIS
EVENING...BISECTING THE AREA FROM SW TO NE AT MIDNIGHT. THE NAM AND
ECMWF DEPICT A PREFRONTAL TROUGH ACROSS CENTRAL INTO SE IA BY LATE
AFTERNOON...THAT MAY BE AN ADDITIONAL FOCUS FOR THUNDERSTORM
DEVELOPMENT AHEAD OF THE MAIN FRONT. WITH FORECAST MUCAPES IN 2500
TO NEARLY 3500 J/KG RANGE BY LATE AFTERNOON AND 0-6 KM SHEAR
EXCEEDING 40 KTS OVER ESPECIALLY THE N AND NE LATE...THERE WILL BE
THE POTENTIAL FOR SUPERCELLS EARLY ON BEFORE MORE LINEAR STORMS
DEVELOP IN THE WANING INSTABILITY LATER IN THE EVENING AHEAD OF THE
MAIN FRONT. SPC HAS THE ENTIRE AREA IN A SLIGHT RISK...AND WITH
SEVERE WORDING ALREADY OUT IN THE FORECAST...WILL MAINTAIN WORDING
ALTHOUGH POTENTIAL LOOKS LIMITED OVER ESPECIALLY THE SE DUE TO
FRONTAL TIMING. KEPT LIKELY POPS CLOSEST TO THE POTENTIAL FOR MOST
WIDESPREAD COVERAGE NEAR THE STRONGER UPPER FORCING IN THE N AND
NE...EXTENDING INTO THE E AND SE AFTER MIDNIGHT.

WENT CLOSE TO MODEL BLEND FOR FORECAST TEMPERATURES...COUNTING ON
INCREASING CLOUDS TO PREVENT MIXING UP TO H8 THAT WOULD PUSH HIGHS
CLOSE TO 90 IN THE SW. MOISTURE ADVECTION AND LOW LEVEL MOISTURE
POOLING WILL PUSH DEW POINTS WELL INTO THE MID AND UPPER 60S FOR A
RATHER MUGGY DAY IN THIS EXCEPTIONALLY COOL JULY.
..SHEETS..

.LONG TERM...SATURDAY THROUGH THURSDAY.
AN ACTIVE PATTERN IS SETTING UP FOR THE EXTENDED PERIOD AS
NORTHWEST FLOW CONTINUES TO DOMINATE OUR LATE JULY WEATHER. MODELS
ARE IN GENERAL AGREEMENT WITH THE OVERALL PATTERN.

THERE MAY BE SOME LINGERING PRECIP ASSOCIATED WITH THE SURFACE
COLD FRONTAL PASSAGE SATURDAY MORNING...OTHERWISE THE WEEKEND
SHOULD BE MOSTLY DRY EXCEPTING THE POTENTIAL FOR LIGHT RAIN MAINLY
DURING THE AFTERNOON AND EVENING TIME FRAME...AND MORE SO IN THE
NORTHEAST PART OF THE CWA RESULTING FROM THE UNSEASONAL TROUGH
HOLDING UP OVER THE GREAT LAKES. THUS HAVE SHADED TEMPS BELOW
GUIDANCE TOO.

LOW LEVEL SOUTHWEST FLOW AND WARMER TEMPS ARE IN STORE MONDAY
AHEAD OF THE NEXT FRONTAL SYSTEM. THE MAIN DYNAMICS REMAIN TO OUR
NORTH BUT SUFFICIENT MOISTURE/INSTABILITY SHOULD POOL AHEAD OF THE
FRONT FOR A CHANCE OF THUNDERSTORMS LATE MONDAY INTO TUESDAY
MORNING. THE SEVERE THREAT APPEARS MINIMAL AT THIS TIME...THOUGH
LOCALLY HEAVY RAIN IS POSSIBLE WITH PRECIPITABLE WATERS PROGGED
AROUND 1.5 INCH OR SLIGHTLY HIGHER. 00Z MODEL RUNS SEEM TO BE A
LITTLE FASTER WITH THE FRONT...SO ADJUSTED GRIDS ACCORDINGLY.

DRY WEATHER AND NEAR TO SLIGHTLY BELOW NORMAL TEMPS LOOK ON TAP
FOR THE REMAINDER OF THE WEEK UNTIL THE NEXT FRONT AND CHANCE OF
RAIN ON FRIDAY. WOLF

&&

.AVIATION...
FOG WILL RESULT IN WIDESPREAD MVFR VISIBILITIES AND LOCAL AREAS OF
IFR AND LIFR UNTIL ABOUT 13Z THIS MORNING. CONDITIONS WILL THEN
IMPROVE TO VFR BY MID MORNING WITH SCATTERED CU AND HIGH LEVEL CIGS
OVERSPREADING THE AREA. THUNDERSTORMS ASSOCIATED WITH AN ADVANCING
COLD FRONT ARE EXPECTED TO IMPACT TERMINALS FOR LESS THAN A COUPLE
HOURS AT ANY GIVEN SITE. WITH SOME UNCERTAINTY IN TIMING...BUT
HIGHER CONFIDENCE IN PROBABILITY...HAVE INCLUDED 3 HOUR TEMPO GROUPS
FOR THUNDERSTORMS DIPPING INTO IFR RANGE WITH MVFR CIGS IN 23Z TO
04Z TIME FRAME THIS EVENING. THERE IS A POTENTIAL FOR STRONG TO
SEVERE SURFACE WIND GUSTS WITH SOME STORMS...BUT PROBABILITY IS TOO
LOW TO INCLUDE IN FORECASTS. FOLLOWING THE FRONTAL PASSAGE...THERE
MAY BE SEVERAL HOURS OF LINGERING MVFR CIGS OVERNIGHT.
..SHEETS..

&&

.DVN WATCHES/WARNINGS/ADVISORIES...
IA...NONE.
IL...NONE.
MO...NONE.
&&

SHEETS/WOLF

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1157 AM CDT FRI JUL 24 2009

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-251000-
BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON-
CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-LOUISA-JEFFERSON-
HENRY IA-DES MOINES-VAN BUREN-LEE-JO DAVIESS-STEPHENSON-CARROLL-
WHITESIDE-ROCK ISLAND-HENRY IL-BUREAU-PUTNAM-MERCER-HENDERSON-
WARREN-HANCOCK-MCDONOUGH-SCOTLAND-CLARK-
1157 AM CDT FRI JUL 24 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
ILLINOIS...NORTHWEST ILLINOIS...WEST CENTRAL ILLINOIS...EAST
CENTRAL IOWA...NORTHEAST IOWA...SOUTHEAST IOWA AND NORTHEAST
MISSOURI.

.DAY ONE...THIS AFTERNOON AND TONIGHT

SEVERE THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND EVENING ALONG
AND AHEAD OF AN ADVANCING COLD FRONT. THE STORM PREDICTION CENTER
HAS A SLIGHT RISK FOR SEVERE STORMS ACROSS THE ENTIRE OUTLOOK AREA.
THUNDERSTORMS LATE THIS MORNING OVER FAR NORTHERN IOWA WILL MOVE
SOUTHEAST INTO EASTERN IOWA THIS AFTERNOON. THE MAIN THREATS WITH
THESE STORMS WILL BE LARGE HAIL UP TO THE SIZE OF GOLFBALLS AND
DAMAGING WINDS IN EXCESS OF 60 MPH. AN ISOLATED TORNADO WILL ALSO
BE POSSIBLE. THROUGH 5 PM THE SEVERE WEATHER THREAT WILL BE EXIST
MAINLY WEST OF THE MISSISSIPPI RIVER AND NORTH OF A LINE FROM
SIGOURNEY TO THE QUAD CITIES.

THIS EVENING...THUNDERSTORMS ARE EXPECTED TO MOVE ACROSS THE REST
OF THE OUTLOOK AREA. SOME OF THESE STORMS MAY CONTINUE TO BE SEVERE
WITH THE PRIMARY RISK BEING WIND GUSTS OVER 60 MPH AND LARGE HAIL.
THESE STORMS WILL ALSO HAVE THE POTENTIAL TO PRODUCE HEAVY DOWNPOURS
AND LOCALLY HEAVY RAINFALL. THE POTENTIAL FOR SEVERE STORMS WILL END
BY 10 PM...WITH THUNDERSTORMS EXITING TO THE SOUTHEAST BY EARLY
MORNING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

MONDAY THROUGH TUESDAY NIGHT...THERE IS A CHANCE OF THUNDERSTORMS
ACROSS THE AREA. SEVERE STORMS ARE NOT EXPECTED.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE REQUIRED FOR PORTIONS OF THE OUTLOOK AREA
THIS AFTERNOON AND EVENING. ANY REPORTS OF HAIL...AND WINDS GREATER
THAN 40 MPH TO THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES WOULD
BE GREATLY APPRECIATED.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
112 PM CDT FRI JUL 24 2009

IAZ040>042-242015-
BUCHANAN-DELAWARE-DUBUQUE-
112 PM CDT FRI JUL 24 2009

...STRONG TO SEVERE THUNDERSTORMS APPROACHING BUCHANAN AND DELAWARE
COUNTIES...

AT 108 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM 30 MILES NORTH OF HAZLETON...OR 26 MILES NORTH OF
OELWEIN...MOVING SOUTHEAST AT 25 MPH. SEVERE WEATHER IN THE FORM
OF LARGE HAIL TO GOLFBALL SIZE AND DAMAGING WINDS OF 60 MPH HAS BEEN
REPORTED WITH THIS STORM. WARNINGS MAY BE NEEDED AS THE STORM GET
CLOSER TO THE AREA.

* THE THUNDERSTORM WILL BE NEAR...
  6 MILES NORTHEAST OF DUNDEE AROUND 230 PM CDT...
  GREELEY AROUND 245 PM CDT...
  ONEIDA AND MANCHESTER AROUND 250 PM CDT...
  DELAWARE AROUND 300 PM CDT...
  EARLVILLE AND DELHI AROUND 305 PM CDT...
  HOPKINTON AROUND 315 PM CDT...

A TORNADO WATCH IS IN EFFECT UNTIL 500 PM CDT FRIDAY AFTERNOON FOR
NORTHEASTERN IOWA.

LAT...LON 4230 9111 4231 9207 4246 9207 4247 9209
      4264 9209 4265 9132
TIME...MOT...LOC 1808Z 326DEG 22KT 4305 9184

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
244 PM CDT FRI JUL 24 2009

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

0221 PM     HAIL             EDGEWOOD                42.64N 91.40W
07/24/2009  M1.75 INCH       DELAWARE           IA   EMERGENCY MNGR

0228 PM     HAIL             GREELEY                 42.59N 91.34W
07/24/2009  M1.75 INCH       DELAWARE           IA   EMERGENCY MNGR

            ALONG WITH 50 MPH WINDS.

0228 PM     HAIL             DELAWARE                42.47N 91.34W
07/24/2009  M1.75 INCH       DELAWARE           IA   EMERGENCY MNGR

0236 PM     HAIL             EARLVILLE               42.48N 91.27W
07/24/2009  M1.00 INCH       DELAWARE           IA   EMERGENCY MNGR

&&

JH2

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
246 PM CDT FRI JUL 24 2009

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

0240 PM     HEAVY RAIN       6 N DYERSVILLE          42.57N 91.12W
07/24/2009  E0.00 INCH       DUBUQUE            IA   TRAINED SPOTTER

            SPOTTER LOOKING TO WEST SEES ROTATING WALL CLOUD. PASSED
            BY ARX WEATHER FORECAST OFFICE.

&&

WE