Alert archive / Iowa / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 53, NWS Des Moines, IA

April 12, 20148 counties in Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Apr 12, 2014, 11:20 PM CDT for 8 counties in Iowa. It was in force for 55 min. 3 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: Apr 12, 2014, 11:20 PM CDT (04:20 UTC)
Expired: Apr 13, 2014, 12:15 AM CDT
In force: 55 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Appanoose County, IA, Davis County, IA, Jasper County, IA, Mahaska County, IA, Marion County, IA, Monroe County, IA, Poweshiek County, IA, Wapello County, IA

The radar

The Des Moines radar (KDMX), 108 km from the middle of the area, began a volume at 04:22 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
Apr 12, 11:20 PM CDT	HAIL 1	1 W Plano, IA	DELAYED REPORT. TIME ESTIMATED FROM RADAR.
Apr 12, 11:37 PM CDT	TSTM WND DMG	Albia, IA	DELAYED REPORT OF TREES AND BRANCHES DOWN IN ALBIA AND AROUND MONROE AND NORTHERN APPANOOSE COUNTIES. TIME ESTIMATED FROM RADAR.
Apr 13, 12:08 AM CDT	HAIL 0.75	4 Nw Ottumwa, IA	PENNY TO DIME SIZE HAIL REPORTED

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 4 storm reports to this severe thunderstorm warning; the first came 0 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
Apr 12, 6:26 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Apr 12, 9:38 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 4.3 hours before the alert went out and 180 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: 661 J/kg
Mixed-layer CIN: -152 J/kg
Mixed-layer LCL: 1978 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

277 
WUUS53 KDMX 130420
SVRDMX
IAC007-051-099-123-125-135-157-179-130515-
/O.NEW.KDMX.SV.W.0053.140413T0420Z-140413T0515Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1120 PM CDT SAT APR 12 2014

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DAVIS COUNTY IN SOUTHEAST IOWA...
  EASTERN MARION COUNTY IN SOUTH CENTRAL IOWA...
  MAHASKA COUNTY IN SOUTH CENTRAL IOWA...
  SOUTHEASTERN JASPER COUNTY IN CENTRAL IOWA...
  MONROE COUNTY IN SOUTH CENTRAL IOWA...
  POWESHIEK COUNTY IN CENTRAL IOWA...
  APPANOOSE COUNTY IN SOUTH CENTRAL IOWA...
  WAPELLO COUNTY IN SOUTHEAST IOWA...

* UNTIL 1215 AM CDT

* AT 1120 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM NEAR MONROE TO 7 MILES SOUTHEAST OF KNOXVILLE TO 12
  MILES WEST OF CENTERVILLE...MOVING EAST AT 50 MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  OTTUMWA...NEWTON...OSKALOOSA...PELLA...GRINNELL...KNOXVILLE...
  CENTERVILLE...ALBIA...BLOOMFIELD...MONTEZUMA...MONROE...BROOKLYN...
  NEW SHARON...EDDYVILLE...OTTUMWA INDUSTRIAL AIRPORT...ROCK CREEK
  LAKE...IOWA SPEEDWAY...LAKE RED ROCK...RATHBUN LAKE AND LAKE
  SUNDOWN.

THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 162 AND 204.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4117 9309 4174 9313 4180 9230 4151 9230
      4150 9241 4118 9241 4116 9240 4116 9219
      4063 9218 4059 9310
TIME...MOT...LOC 0420Z 248DEG 45KT 4159 9309 4126 9298 4068 9310 

HAIL...1.00IN
WIND...60MPH

$$

BEERENDS

5 follow-up statements

263 
WWUS53 KDMX 130434
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1134 PM CDT SAT APR 12 2014

IAC007-051-099-123-125-135-157-179-130515-
/O.CON.KDMX.SV.W.0053.000000T0000Z-140413T0515Z/
DAVIS IA-MARION IA-MAHASKA IA-JASPER IA-MONROE IA-POWESHIEK IA-
APPANOOSE IA-WAPELLO IA-
1134 PM CDT SAT APR 12 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT
FOR DAVIS...EASTERN MARION...MAHASKA...SOUTHEASTERN JASPER...
MONROE...POWESHIEK...APPANOOSE AND WAPELLO COUNTIES...

AT 1133 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM NEAR ROCK CREEK LAKE TO 6 MILES NORTH OF OSKALOOSA TO
NEAR CENTERVILLE...MOVING EAST AT 75 MPH.

HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. AT 1120 PM CDT...61 MPH WINDS WERE 
REPORTED IN KNOXVILLE. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING AND TREES. 

LOCATIONS IMPACTED INCLUDE...
OTTUMWA...NEWTON...OSKALOOSA...PELLA...GRINNELL...KNOXVILLE...
CENTERVILLE...ALBIA...BLOOMFIELD...MONTEZUMA...MONROE...BROOKLYN...
NEW SHARON...EDDYVILLE...OTTUMWA INDUSTRIAL AIRPORT...ROCK CREEK
LAKE...IOWA SPEEDWAY...LAKE RED ROCK...RATHBUN LAKE AND LAKE SUNDOWN.

THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 163 AND 204.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4117 9309 4174 9312 4180 9230 4151 9230
      4150 9241 4118 9241 4116 9240 4116 9219
      4063 9218 4067 9309
TIME...MOT...LOC 0433Z 247DEG 64KT 4167 9282 4137 9260 4073 9293 

HAIL...1.00IN
WIND...60MPH

$$

BEERENDS

727 
WWUS53 KDMX 130447
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1147 PM CDT SAT APR 12 2014

IAC007-051-099-123-125-135-157-179-130515-
/O.CON.KDMX.SV.W.0053.000000T0000Z-140413T0515Z/
DAVIS IA-MARION IA-MAHASKA IA-JASPER IA-MONROE IA-POWESHIEK IA-
APPANOOSE IA-WAPELLO IA-
1147 PM CDT SAT APR 12 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT
FOR NORTHERN DAVIS...EASTERN MARION...MAHASKA...SOUTHEASTERN
JASPER...MONROE...POWESHIEK...NORTHERN APPANOOSE AND WAPELLO
COUNTIES...

AT 1147 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM NEAR GRINNELL TO NEAR WHAT CHEER TO LAKE SUNDOWN...
MOVING EAST AT 50 MPH.

HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING AND TREES. 

LOCATIONS IMPACTED INCLUDE...
OTTUMWA...OSKALOOSA...PELLA...GRINNELL...KNOXVILLE...ALBIA...
BLOOMFIELD...MONTEZUMA...MONROE...BROOKLYN...NEW SHARON...
EDDYVILLE...OTTUMWA INDUSTRIAL AIRPORT...ROCK CREEK LAKE...LAKE RED
ROCK...RATHBUN LAKE...LAKE SUNDOWN...ELDON...VICTOR AND SULLY.

THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 170 AND 204.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4116 9305 4159 9311 4176 9284 4180 9230
      4151 9230 4150 9241 4118 9241 4116 9240
      4116 9219 4074 9218 4082 9302
TIME...MOT...LOC 0447Z 256DEG 43KT 4173 9264 4137 9241 4084 9273 

HAIL...1.00IN
WIND...60MPH

$$

BEERENDS

401 
WWUS53 KDMX 130454
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1154 PM CDT SAT APR 12 2014

IAC099-125-130503-
/O.CAN.KDMX.SV.W.0053.000000T0000Z-140413T0515Z/
MARION IA-JASPER IA-

1154 PM CDT SAT APR 12 2014

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN MARION AND
SOUTHEASTERN JASPER COUNTIES IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE 
WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 AM CDT 
SUNDAY MORNING FOR SOUTHERN IOWA. A SEVERE THUNDERSTORM WATCH ALSO 
REMAINS IN EFFECT UNTIL 500 AM CDT SUNDAY MORNING FOR IOWA.

LAT...LON 4081 9294 4117 9285 4150 9286 4151 9275
      4177 9274 4180 9230 4151 9230 4151 9241
      4118 9241 4116 9240 4116 9219 4074 9218
TIME...MOT...LOC 0453Z 248DEG 45KT 4174 9260 4138 9237 4085 9269 

$$

IAC007-051-123-135-157-179-130515-
/O.CON.KDMX.SV.W.0053.000000T0000Z-140413T0515Z/
DAVIS IA-MAHASKA IA-MONROE IA-POWESHIEK IA-APPANOOSE IA-WAPELLO IA-
1154 PM CDT SAT APR 12 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT
FOR NORTHERN DAVIS...MAHASKA...EASTERN MONROE...POWESHIEK...
NORTHEASTERN APPANOOSE AND WAPELLO COUNTIES...

AT 1153 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 6 MILES EAST OF GRINNELL TO WHAT CHEER TO NEAR LAKE
SUNDOWN...MOVING EAST AT 50 MPH.

HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING AND TREES. 

LOCATIONS IMPACTED INCLUDE...
OTTUMWA...OSKALOOSA...GRINNELL...ALBIA...BLOOMFIELD...MONTEZUMA...
BROOKLYN...NEW SHARON...EDDYVILLE...OTTUMWA INDUSTRIAL AIRPORT...LAKE
SUNDOWN...RATHBUN LAKE...ELDON...VICTOR...FREMONT...MORAVIA...
AGENCY...BEACON...UNIVERSITY PARK AND BLAKESBURG.

THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 182 AND 204.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4081 9294 4117 9285 4150 9286 4151 9275
      4177 9274 4180 9230 4151 9230 4151 9241
      4118 9241 4116 9240 4116 9219 4074 9218
TIME...MOT...LOC 0453Z 248DEG 45KT 4174 9260 4138 9237 4085 9269 

HAIL...1.00IN
WIND...60MPH

$$

BEERENDS

388 
WWUS53 KDMX 130457
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1157 PM CDT SAT APR 12 2014

IAC007-051-130507-
/O.CAN.KDMX.SV.W.0053.000000T0000Z-140413T0515Z/
DAVIS IA-APPANOOSE IA-

1157 PM CDT SAT APR 12 2014

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN DAVIS AND
NORTHEASTERN APPANOOSE COUNTIES IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE 
WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 AM CDT SUNDAY
MORNING FOR SOUTHERN IOWA.A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN
EFFECT UNTIL 500 AM CDT SUNDAY MORNING FOR  IOWA.

LAT...LON 4090 9282 4142 9268 4152 9262 4178 9263
      4180 9230 4151 9230 4151 9241 4118 9241
      4116 9240 4116 9219 4090 9219
TIME...MOT...LOC 0457Z 247DEG 45KT 4177 9241 4139 9235 4093 9259 

$$

IAC123-135-157-179-130515-
/O.CON.KDMX.SV.W.0053.000000T0000Z-140413T0515Z/
MAHASKA IA-MONROE IA-POWESHIEK IA-WAPELLO IA-
1157 PM CDT SAT APR 12 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT
FOR MAHASKA...EASTERN MONROE...EASTERN POWESHIEK AND WAPELLO
COUNTIES...

AT 1157 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM NEAR BROOKLYN TO WHAT CHEER TO 10 MILES NORTHEAST OF
LAKE SUNDOWN...MOVING EAST AT 50 MPH.

HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING AND TREES. 

LOCATIONS IMPACTED INCLUDE...
OTTUMWA...OSKALOOSA...ALBIA...MONTEZUMA...BROOKLYN...NEW SHARON...
EDDYVILLE...OTTUMWA INDUSTRIAL AIRPORT...ELDON...VICTOR...FREMONT...
AGENCY...BEACON...UNIVERSITY PARK...BLAKESBURG...MALCOM...DEEP
RIVER...BARNES CITY...ROSE HILL AND KIRKVILLE.

THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 188 AND 204.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4090 9282 4142 9268 4152 9262 4178 9263
      4180 9230 4151 9230 4151 9241 4118 9241
      4116 9240 4116 9219 4090 9219
TIME...MOT...LOC 0457Z 247DEG 45KT 4177 9241 4139 9235 4093 9259 

HAIL...1.00IN
WIND...60MPH

$$

BEERENDS

732 
WWUS53 KDMX 130516
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1216 AM CDT SUN APR 13 2014

IAC123-135-157-179-130525-
/O.EXP.KDMX.SV.W.0053.000000T0000Z-140413T0515Z/
MAHASKA IA-MONROE IA-POWESHIEK IA-WAPELLO IA-
1216 AM CDT SUN APR 13 2014

...THE SEVERE THUNDERSTORM WARNING FOR MAHASKA...EASTERN MONROE...
EASTERN POWESHIEK AND WAPELLO COUNTIES HAS EXPIRED...
    
THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
AREA. THEREFORE THE WARNING HAS BEEN ALLOWED TO EXPIRE.  A FEW 
STRONG STORMS REMAIN NORTH OF OTTUWMA AND WILL PRODUCE GUSTY WINDS 
TO 45 MPH ALONG WITH PENNY SIZED HAIL THROUGH 1230 PM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 AM CDT SUNDAY
MORNING FOR SOUTHERN IOWA.A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN
EFFECT UNTIL 500 AM CDT SUNDAY MORNING FOR  IOWA.

LAT...LON 4090 9282 4142 9268 4152 9262 4178 9263
      4180 9230 4151 9230 4151 9241 4118 9241
      4116 9240 4116 9219 4090 9219
TIME...MOT...LOC 0512Z 248DEG 45KT 4177 9241 4139 9235 4093 9259 

$$

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 Apr 12, 7:39 PM CDT, 3 hours 41 minutes earlier.

Area forecast discussion, Apr 12, 7:39 PM CDT, 3 hours 41 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DES MOINES IA
739 PM CDT SAT APR 12 2014

.SHORT TERM /TONIGHT/...
ISSUED AT 324 PM CDT SAT APR 12 2014

SEVERE THUNDERSTORM POTENTIAL LATE THIS AFTERNOON AND EVENING IS THE
PRIMARY FOCUS. GOOD ENVIRONMENT SET UP FOR SEVERAL SEVERE STORMS
CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WINDS. HIGH RES MODELS
AND LATEST NEAR STORM ENVIRONMENT WOULD SUGGEST FOCUS FOR
THUNDERSTORM INITIATION WILL BE FROM NEAR WAVERLY TO WATERLOO BACK
WEST TOWARDS FORT DODGE AND SOUTHWEST TO CARROLL AND AUDUBON.
MLCAPES NEAR 2000 J/KG WITH EFFECTIVE BULK SHEAR VALUES OF 35 TO 45
WOULD SUPPORT SUPERCELL DEVELOPMENT AS THE MID LEVEL CAP DISSOLVES
AS COOLING AND DYNAMIC FORCING ARRIVE WITH THE APPROACH OF A STRONG
SHORT WAVE FROM THE SOUTHWEST. TORNADO POTENTIAL WILL BE LIMITED
GIVEN THE HIGH LCL VALUES IN EXCESS OF 3000 FT AND EFFECTIVE SRH
VALUES LESS THAN 100 M2/S2 WITH SFC WINDS HAVING A WESTERLY
COMPONENT. STEEP MID LEVEL LAPSE RATES AND SOME MID LEVEL DRY AIR
WOULD SUPPORT FAT CAPES AND GOOD VERTICAL ACCELERATION FOR ENHANCED
UPDRAFTS AND VERY LARGE HAIL POTENTIAL UP TO 2 INCHES IN DIAMETER.
DCAPES NEAR 1000 J/KG IN ADDITION TO HAIL ENHANCING COLD POOL
DEVELOPMENT AND DAMAGING WIND THREAT WITH WIND POTENTIAL TO 70 MPH
POSSIBLE.

THUNDERSTORMS WILL GRADUALLY BECOME MORE MULTICELLULAR AS THE ENTIRE
LINE SINKS SOUTHEAST THIS EVENING. THE HAIL AND WIND THREAT WILL
CONTINUE BUT LOWER TO MORE QUARTER SIZED HAIL AND 60 MPH WINDS.
POTENTIAL FOR EFFICIENT RAIN POTENTIAL RAIN DEVELOPING WITH RAINFALL
AMOUNTS IN EXCESS OF ONE INCH IS POSSIBLE. NO HYDROLOGY CONCERNS
OVERALL DUE TO THE DRY WEATHER AND SOIL BUT CERTAINLY HEAVY
DOWNPOURS COULD RESULT IN PONDING. A LULL IN ACTIVITY IS POSSIBLE
AFTER MIDNIGHT BEFORE THE LOW LEVEL JET INCREASES THROUGH EASTERN
KANSAS AND WESTERN MISSOURI WITH MUCAPES APPROACHING 1500 J/KG ALONG
AND SOUTH OF INTERSTATE 80 AFTER 09Z. COULD BE A FEW ELEVATED HAIL
STORMS WITH THIS ACTIVITY.

.LONG TERM /SUNDAY THROUGH SATURDAY/...
ISSUED AT 324 PM CDT SAT APR 12 2014

AS THE FRONT MOVING THROUGH TONIGHT EXITS TO THE SOUTHEAST
TOMORROW...THE BROAD ASCENT ASSOCIATED WITH AN APPROACHING 500 MB
TROUGH AND SUBSTANTIAL ATMOSPHERIC MOISTURE IN PLACE WILL ALLOW FOR
WIDESPREAD RAIN AND SOME THUNDERSTORMS ACROSS ABOUT THE SOUTHEAST
HALF ON SUNDAY. HAVE INCREASED POPS AND QPF FURTHER FOR MOST OF THE
AREA ACCORDINGLY. HOWEVER...INSTABILITY WILL BE MUCH LOWER THAN
TODAY AND SEVERE WEATHER IS NOT ANTICIPATED. HEAVY RAIN WILL BE
POSSIBLE...ESPECIALLY OVER THE SOUTH AND SOUTHEAST...BUT GIVEN THE
ANTECEDENT CONDITIONS ANY FLOODING SHOULD BE MINIMAL AND LIMITED TO
AREAS THAT ARE ABLE TO RECEIVE RAINFALL AT A RAPID RATE. ALL IN ALL
SUNDAY WILL BE COOL...WINDY...AND VERY WET ACROSS MOST OF IOWA. AS
THE SYSTEM AND PRECIP DEPART TO THE SOUTHEAST ON SUNDAY NIGHT COOLER
AIR SURGING IN BEHIND THE FRONT MAY CAUSE THE RAIN TO CHANGE OVER TO
SNOW FOR A SHORT PERIOD...BUT LITTLE TO NO ACCUMULATION IS EXPECTED
GIVEN MARGINAL TEMPERATURES AND LIGHT QPF BY THAT TIME.

FROM MONDAY INTO TUESDAY A MUCH COLDER AIRMASS WILL MOVE ACROSS THE
REGION LEADING TO QUIET WEATHER BUT WITH TEMPERATURES WELL BELOW
NORMAL...BOTTOMING OUT ON TUESDAY MORNING WITH LOWS IN THE 20S
STATEWIDE AND A FEW UPPER TEENS POSSIBLE. BY TUESDAY AFTERNOON A
WARMING TREND WILL KICK IN AS SOUTHERLY FLOW RETURNS AHEAD OF A
BROAD TROUGH OF LOW PRESSURE DEVELOPING OVER THE WESTERN HIGH
PLAINS...COINCIDENT WITH MODEST THERMAL RIDGING ALOFT. BY WEDNESDAY
HIGHS WILL ALREADY BE BACK INTO THE 50S AND LOWER 60S...BUT A COLD
FRONT ASSOCIATED WITH THE AFOREMENTIONED TROUGH WILL BE APPROACHING
FROM THE NORTHWEST. THE FRONT SHOULD NOT AFFECT OUR AREA...OTHER
THAN POSSIBLY THE FAR NORTH/NORTHWEST...DURING THE DAY ON WEDNESDAY
LEADING TO THE AFOREMENTIONED WARM TEMPERATURES. THIS FRONT WILL BE
SPURRED ON BY A 500 MB TROUGH MOVING FROM THE WESTERN INTO THE
CENTRAL CONUS...HOWEVER...THERE HAS BEEN MUCH DEBATE AMONGST THE
LONG RANGE MODELS OVER THE LAST SEVERAL DAYS AS TO HOW THIS 500 MB
TROUGH WILL EVOLVE FROM MIDWEEK INTO NEXT WEEKEND. THE EC CONTINUES
TO REPRESENT A MORE PROGRESSIVE VIEW...WHILE THE GFS AND GEM
STUBBORNLY PERSIST IN A MORE AMPLIFIED AND SLOWER SOLUTION. THE
RESULT IS A HIGH DEGREE OF UNCERTAINTY AND A PROLONGED PERIOD OF
GENERALLY 30 TO 40 POPS ACROSS THE AREA FOR THE LATTER HALF OF THE
WEEK.

&&

.AVIATION...13/00Z
ISSUED AT 739 PM CDT SAT APR 12 2014

THUNDERSTORMS WILL CONTINUE INVOF A COLD FRONT SLIDING SOUTHEAST
ACROSS IOWA THIS EVE. PRIMARY PRECIPITATION WILL BE FOCUSED IN THE
VICINITY OF THE BOUNDARY. AN AREA OF STRATUS WILL DEVELOP OVERNIGHT
WITH MVFR CONDITIONS AND POSSIBLY IFR DEVELOPING BEHIND THE FRONT.
ANOTHER ROUND OF PRECIPITATION DEVELOPING SUNDAY MORNING. CIGS ARE
EXPECTED TO BECOME IFR TO MVFR WITH BREEZY NORTHEAST WINDS
DEVELOPING TO END THE PERIOD.

&&

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

&&

SHORT TERM...DONAVON
LONG TERM...LEE
AVIATION...ZOGG

Hazardous weather outlook, Apr 12, 10:00 PM CDT, 1 hour 20 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
1000 PM CDT SAT APR 12 2014

IAZ004>007-015-016-140300-
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-
1000 PM CDT SAT APR 12 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...TONIGHT

ISOLATED TO SCATTERED THUNDERSTORMS ARE POSSIBLE OVERNIGHT. SEVERE
STORMS ARE NOT EXPECTED BUT AN ISOLATED THUNDERSTORM WITH QUARTER
SIZED HAIL CANNOT BE RULED OUT.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

IAZ017-023>028-033>039-044>050-057>062-070>075-140300-
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-
1000 PM CDT SAT APR 12 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...TONIGHT

PERIODS OF THUNDERSTORMS WILL OCCUR TONIGHT. SEVERE THUNDERSTORMS
WITH VERY LARGE HAIL TO 2 INCHES IN DIAMETER AND DAMAGING WINDS TO
70 MPH ARE POSSIBLE THROUGH 5 AM.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

SCATTERED THUNDERSTORMS ARE POSSIBLE THROUGHOUT SUNDAY. AN
ISOLATED SEVERE STORM WITH QUARTER SIZE HAIL IS POSSIBLE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS EXPECTED THROUGH TONIGHT. ANY SEVERE
WEATHER REPORTS WOULD BE APPRECIATED.

IAZ081>086-092>097-140300-
ADAMS-UNION-CLARKE-LUCAS-MONROE-WAPELLO-TAYLOR-RINGGOLD-DECATUR-
WAYNE-APPANOOSE-DAVIS-
1000 PM CDT SAT APR 12 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...TONIGHT

PERIODS OF THUNDERSTORMS WILL OCCUR TONIGHT. SEVERE THUNDERSTORMS
WITH VERY LARGE HAIL TO 2 INCHES IN DIAMETER AND DAMAGING WINDS TO
70 MPH ARE POSSIBLE THROUGH 2 AM.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

SCATTERED THUNDERSTORMS ARE POSSIBLE THROUGHOUT SUNDAY. AN
ISOLATED SEVERE STORM WITH QUARTER SIZE HAIL IS POSSIBLE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS EXPECTED THROUGH THIS EVENING. ANY SEVERE
WEATHER REPORTS WOULD BE APPRECIATED.

FAB

In the hours before

Local storm report, Apr 12, 10:49 PM CDT, 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1049 PM CDT SAT APR 12 2014

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

0900 PM     HAIL             CEDAR FALLS             42.52N 92.45W
04/12/2014  M1.00 INCH       BLACK HAWK         IA   PUBLIC

            QUARTER SIZE HAIL REPORTED VIA SOCIAL MEDIA

&&

Local storm report, Apr 12, 10:57 PM CDT, 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1057 PM CDT SAT APR 12 2014

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

1055 PM     HAIL             6 W LACONA              41.20N 93.50W
04/12/2014  E1.00 INCH       WARREN             IA   PUBLIC

            NICKEL AND QUARTER SIZED HAIL REPORTED IN
            LIBERTY CENTER. VIA SOCIAL MEDIA.

&&

NWS DES MOINES IA
IRIS SYSTEM

Local storm report, Apr 12, 11:08 PM CDT, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1108 PM CDT SAT APR 12 2014

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

1100 PM     TSTM WND GST     N CHARITON AIRPORT      41.02N 93.36W
04/12/2014  M60 MPH          LUCAS              IA   AWOS

            60 MPH GUST REPORTED BY CHARITON AWOS.

&&

ZOGG

Local storm report, Apr 12, 11:15 PM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1115 PM CDT SAT APR 12 2014

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

1111 PM     HAIL             5 W CHARITON AIRPORT    41.03N 93.46W
04/12/2014  E0.88 INCH       LUCAS              IA   TRAINED SPOTTER

            NICKEL SIZED HAIL.

&&

ZOGG

Local storm report, Apr 12, 11:18 PM CDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1118 PM CDT SAT APR 12 2014

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

1110 PM     TSTM WND GST     N KNOXVILLE AIRPORT     41.30N 93.11W
04/12/2014  E60 MPH          MARION             IA   AWOS

            60 MPH GUST REPORTED BY KNOXVILLE AWOS.

&&

ZOGG

Local storm report, Apr 12, 11:20 PM CDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1120 PM CDT SAT APR 12 2014

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

1118 PM     HAIL             3 S GRINNELL            41.70N 92.73W
04/12/2014  E1.00 INCH       POWESHIEK          IA   TRAINED SPOTTER

            QUARTER SIZED HAIL REPORTED AT I-80 EXIT
            NUMBER 282.

&&

NWS DES MOINES IA
IRIS SYSTEM

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 12, 7:18 PM CDT	Severe Thunderstorm Warning	DMX	Bremer	42 min
Apr 12, 7:19 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Hamilton, Hardin, Story	26 min
Apr 12, 7:29 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Hamilton, Webster	46 min
Apr 12, 7:34 PM CDT	Severe Thunderstorm Warning	DMX	Cass	41 min
Apr 12, 7:39 PM CDT	Severe Thunderstorm Warning	DMX	Guthrie	51 min
Apr 12, 7:39 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Pocahontas, Sac	36 min
Apr 12, 7:45 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Hamilton, Hardin, Story	45 min
Apr 12, 7:54 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Cass	51 min
Apr 12, 7:57 PM CDT	Severe Thunderstorm Warning	DMX	Franklin, Hamilton, Hardin, Wright	33 min
Apr 12, 8:03 PM CDT	Severe Thunderstorm Warning	DMX	Boone	27 min
Apr 12, 8:15 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Sac	30 min
Apr 12, 8:17 PM CDT	Severe Thunderstorm Warning	DMX	Crawford, Sac	28 min
Apr 12, 8:20 PM CDT	Severe Thunderstorm Warning	DMX	Crawford	40 min
Apr 12, 8:24 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Hamilton, Hardin, Marshall, Story	36 min
Apr 12, 8:30 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Franklin	30 min
Apr 12, 8:31 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Hamilton, Story	44 min
Apr 12, 8:34 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Cass	41 min
Apr 12, 8:36 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Dallas, Guthrie, Madison	39 min
Apr 12, 8:41 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Webster	49 min
Apr 12, 8:43 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Sac	32 min
Apr 12, 8:49 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer	41 min
Apr 12, 8:58 PM CDT	Severe Thunderstorm Warning	DMX	Grundy, Hardin, Marshall, Tama	32 min
Apr 12, 9:07 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Polk	38 min
Apr 12, 9:11 PM CDT	Severe Thunderstorm Warning	DMX	Grundy, Hardin	34 min
Apr 12, 9:12 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams	33 min
Apr 12, 9:34 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Grundy, Marshall, Tama	41 min
Apr 12, 9:43 PM CDT	Special Weather Statement	DMX	Hamilton	32 min
Apr 12, 9:44 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Madison, Union	46 min
Apr 12, 9:46 PM CDT	Special Weather Statement	DMX	Polk	29 min
Apr 12, 9:49 PM CDT	Special Weather Statement	DMX	Madison	26 min
Apr 12, 9:54 PM CDT	Special Weather Statement	DMX	Carroll	36 min
Apr 12, 10:06 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Hardin	24 min
Apr 12, 10:07 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Madison, Union, Warren	38 min
Apr 12, 10:09 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer, Tama	36 min
Apr 12, 10:15 PM CDT	Severe Thunderstorm Warning	DMX	Decatur, Ringgold	45 min
Apr 12, 10:20 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marshall, Poweshiek, Tama	25 min
Apr 12, 10:26 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Madison, Union, Warren	34 min
Apr 12, 10:31 PM CDT	Special Weather Statement	DMX	Polk	29 min
Apr 12, 10:33 PM CDT	Special Weather Statement	DMX	Humboldt	27 min
Apr 12, 10:44 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Lucas, Marion, Monroe, Warren	46 min
Apr 12, 10:44 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marshall, Poweshiek, Tama	31 min
Apr 12, 10:54 PM CDT	Severe Thunderstorm Warning	DMX	Wayne	36 min
Apr 12, 11:11 PM CDT	Severe Thunderstorm Warning	DMX	Poweshiek, Tama	34 min
Apr 13, 12:32 AM CDT	Special Weather Statement	DMX	Carroll	28 min
Apr 13, 1:15 AM CDT	Special Weather Statement	DMX	Webster	30 min
Apr 13, 2:52 AM CDT	Severe Thunderstorm Warning	DMX	Adair, Cass, Guthrie	38 min
Apr 13, 3:37 PM CDT	Flood Watch	DMX	Appanoose, Black Hawk, Davis, Decatur, Grundy, Jasper and 9 more	6 hr
Apr 13, 3:44 PM CDT	Wind Advisory	DMX	Adair, Adams, Audubon, Boone, Calhoun, Carroll and 28 more	8 hr

Nearby

Severe Thunderstorm Warnings in Iowa, 2014 Every severe thunderstorm warning in 2014

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.