Alert archive / Iowa / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 60, NWS Des Moines, IA

April 28, 2014Carroll County, Crawford County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Apr 28, 2014, 2:26 PM CDT for Carroll County, Crawford County, Iowa. It was in force for 49 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: Apr 28, 2014, 2:26 PM CDT (19:26 UTC)
Expired: Apr 28, 2014, 3:15 PM CDT
In force: 49 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Carroll County, IA, Crawford County, IA

The radar

The Des Moines radar (KDMX), 114 km from the middle of the area, began a volume at 19:29 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 nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 7.4 hours before the alert went out and 129 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: 7 J/kg
Mixed-layer CIN: -225 J/kg
Mixed-layer LCL: 872 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 171 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.

153 
WUUS53 KDMX 281926
SVRDMX
IAC027-047-282015-
/O.NEW.KDMX.SV.W.0060.140428T1926Z-140428T2015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
226 PM CDT MON APR 28 2014

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN CRAWFORD COUNTY IN WEST CENTRAL IOWA...
  SOUTHWESTERN CARROLL COUNTY IN WEST CENTRAL IOWA...

* UNTIL 315 PM CDT

* AT 226 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR MANNING...OR
  11 MILES NORTH OF AUDUBON...MOVING NORTHWEST AT 20 MPH.

  HAZARD...QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...DAMAGE TO VEHICLES IS EXPECTED. 

* LOCATIONS IMPACTED INCLUDE...
  MANNING...MANILLA...ARCADIA...VAIL...TEMPLETON...WESTSIDE...
  HALBUR...ASPINWALL AND MANNING MUNICIPAL AIRPORT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 PM CDT MONDAY EVENING FOR
SOUTHERN IOWA.

LAT...LON 4217 9512 4188 9483 4186 9493 4186 9502
      4187 9503 4186 9514 4196 9535
TIME...MOT...LOC 1926Z 133DEG 16KT 4188 9499 

HAIL...1.00IN
WIND...<50MPH

$$

COGIL

2 follow-up statements

951 
WWUS53 KDMX 281942
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
242 PM CDT MON APR 28 2014

IAC027-047-282015-
/O.CON.KDMX.SV.W.0060.000000T0000Z-140428T2015Z/
CRAWFORD IA-CARROLL IA-
242 PM CDT MON APR 28 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM CDT
FOR EAST CENTRAL CRAWFORD AND SOUTHWESTERN CARROLL COUNTIES...

AT 242 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER MANNING...OR
13 MILES SOUTHWEST OF CARROLL...MOVING NORTHWEST AT 20 MPH.

HAZARD...QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...DAMAGE TO VEHICLES IS EXPECTED. 

LOCATIONS IMPACTED INCLUDE...
MANNING...ARCADIA...VAIL...TEMPLETON...WESTSIDE...HALBUR AND MANNING
MUNICIPAL AIRPORT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 PM CDT MONDAY EVENING FOR
SOUTHERN IOWA.

LAT...LON 4217 9512 4188 9483 4186 9493 4189 9509
      4201 9530
TIME...MOT...LOC 1942Z 133DEG 16KT 4193 9506 

HAIL...1.00IN
WIND...<50MPH

$$

COGIL

256 
WWUS53 KDMX 282010
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
310 PM CDT MON APR 28 2014

IAC027-047-282020-
/O.EXP.KDMX.SV.W.0060.000000T0000Z-140428T2015Z/
CRAWFORD IA-CARROLL IA-
310 PM CDT MON APR 28 2014

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL CRAWFORD AND
SOUTHWESTERN CARROLL COUNTIES WILL EXPIRE AT 315 PM CDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 PM CDT MONDAY EVENING FOR
SOUTHERN IOWA.

LAT...LON 4217 9512 4188 9483 4186 9493 4189 9509
      4201 9530
TIME...MOT...LOC 2007Z 133DEG 16KT 4193 9506 

$$

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 28, 12:41 PM CDT, 1 hour 45 minutes earlier.

Area forecast discussion, Apr 28, 12:41 PM CDT, 1 hour 45 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DES MOINES IA
1241 PM CDT MON APR 28 2014

.SHORT TERM /TODAY/...
ISSUED AT 425 AM CDT MON APR 28 2014

PRECIP TRENDS AND SEVERE WEATHER POTENTIAL REMAIN THE TOP CONCERNS
FOR THE FORECAST TODAY. UPPER LOW CURRENTLY OVER NE WILL DRIFT
SLOWLY EASTWARD CLOSER TO THE MO RIVER BY 00Z.  ALTHOUGH MOISTURE
WILL LINGER ACROSS THE STATE...SYNOPTIC SCALE FORCING HAS WEAKENED
AND BECOME SOMEWHAT PATCHY. HOWEVER MODELS DO INDICATE ANOTHER
PULSE OF FORCING OVER NRN IA DURING THE AFTERNOON SO PRECIP MAY
EXPAND THERE A BIT ONCE AGAIN.

FARTHER TO THE SOUTH CONVECTIVE TRENDS WILL NEED TO BE MONITORED.
AFOREMENTIONED LARGE SCALE FORCING DECREASE WILL NOT CONTRIBUTE MUCH
IN THESE LOCATIONS TODAY...AND THERE IS CURRENTLY LITTLE IN THE WAY
OF LOW LEVEL CONVERGENCE WITH WARM FRONT DIFFUSE AND COLD FRONT TO
OUR SOUTH. HOWEVER AS THE UPPER LOW APPROACHES LATER TODAY WEST TO
EAST CONVERGENCE WILL STRENGTHEN DURING THE AFTERNOON AS OCCLUDED
FRONT MATURES IN VICINITY OF I80 WITH COLD FRONT PUSHING MORE EAST
THAN NORTH. NAM/GFS BOTH DEPICT UNCAPPED MLCAPES 1000 J/KG OR
GREATER SO EXPECT SCATTERED CONVECTION TO DEVELOP. DEEP SHEAR WILL
BE DIMINISHING AS THE UPPER LOW NEARS SO DO NOT EXPECT MUCH IN THE
WAY OF A LARGE HAIL OR WIND THREAT...BUT THE LANDSPOUT TORNADO
POTENTIAL WILL NEED TO BE MONITORED. 0-3KM CAPES EXCEED 100 J/KG
CREATING A FAVORABLE THERMODYNAMIC ENVIRONMENT NEAR ENHANCED
SURFACE VORTICITY ALONG THE BOUNDARY. MEAN WIND AND STORM MOTION
WILL INITIALLY BE TOO STRONG...BUT WEAKENS CONSIDERABLY TO AROUND
20KTS 21Z-00Z WHICH WOULD BE MORE FAVORABLE. NON-SUPERCELL
PARAMETERS ARE STILL AROUND ONE NEAR THE LOW IN NE AT 08Z WITH
0-3KM CAPES PUSHING 150 J/KG...EVEN AT THIS TIME OF THE MORNING.
THIS IS SOMEWHAT DISCONCERTING AS THESE ALREADY NOTED CONDITIONS
ARE EXPECTED TO SPREAD EASTWARD ALONG THE DEVELOPING BOUNDARY
DURING HEATING LATER IN THE DAY.

TEMPS ARE SOMEWHAT PROBLEMATIC AS WELL WITH QUITE THE SPREAD IN MOS
AND RAW MODEL TEMPS. CONSIDERING THE AMOUNT OF LINGERING
MOISTURE...CLOUDINESS AND EASTERLY WINDS HAVE LEANED TOWARD THE
COOLER NAM MOS. SLIGHTLY MORE MIXING COULD OBVIOUSLY WARM THINGS
AS WELL...AND ALSO CONTRIBUTE TO MORE COVERAGE AND STRONGER
CONVECTION. HIGHER LCLS IN THIS SCENARIO WOULD REDUCE THE
LANDSPOUT POTENTIAL HOWEVER.

.LONG TERM /TONIGHT THROUGH SUNDAY/...
ISSUED AT 425 AM CDT MON APR 28 2014

A LARGE STACKED LOW PRESSURE SYSTEM WILL DOMINATE THE MIDWEST AND
GREAT LAKES REGION FOR MOST OF THIS WEEK...PRODUCING PERSISTENT
COLD...CLOUDY...AND DAMP CONDITIONS ACROSS IOWA WITH LIGHT RAIN
CHANCES AND VERY LITTLE CHANCE OF SUNSHINE FROM TUESDAY THROUGH
THURSDAY. HAVE CONTINUED TO TREND POPS UPWARD PARTICULARLY FROM
TUESDAY THROUGH THURSDAY...HOWEVER AMOUNTS WILL GENERALLY BE
LIGHT WITH NO THUNDER IN THE FORECAST. IN THIS PATTERN IT IS
DIFFICULT TO SEE MUCH DAYTIME HEATING DESPITE THE SEASON...AND
HAVE ALSO KEPT MAX TEMPS IN CHECK AND BELOW GUIDANCE FOR ALL OF
THESE DAYS. ALL IN ALL IT WILL BE A MISERABLE STRETCH FOR MOST
OUTDOOR ACTIVITIES.

THE LARGE GYRE WILL FINALLY BEGIN TO PUSH OFF TO THE NORTHEAST ON
FRIDAY PROVIDING A BRIEF RESPITE AND SOME CLEARING ALTHOUGH
TEMPERATURES WILL REMAIN BELOW NORMAL. NEXT WEEKEND IT APPEARS
LIKELY THAT ANOTHER...WEAKER LOW PRESSURE SYSTEM WILL DEVELOP OVER
THE HIGH PLAINS AND SPREAD MORE RAINFALL ACROSS PARTS OF THE
MIDWEST AND POTENTIALLY IOWA BY LATE SATURDAY INTO SUNDAY. NO
SIGNIFICANT WARMING IS SEEN IN THE NEXT WEEK.

&&

.AVIATION...28/18Z
ISSUED AT 1241 PM CDT MON APR 28 2014

MAIN CONCERNS ARE WINDS OVER NORTHERN IOWA ALONG WITH FOG...ACROSS
THE SOUTH STILL LOOKING AT SCT THUNDER THIS AFTERNOON WITH
POTENTIAL FOR SVR STORMS TODAY AFFECTING MAINLY THE SOUTHERN TAF
SITES OF KOTM AND KDSM FROM 20-00Z MAINLY. OVERNIGHT SHOWERS AND
DRIZZLE WILL CONTINUE WITH LIFR TO IFR CIGS MOST AREAS. NOT MUCH
IMPROVEMENT THROUGH 24 HOURS...THOUGH WINDS WILL RELAX A BIT
TUESDAY FOR MOST OF THE REGION./REV

&&

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

SHORT TERM...SMALL
LONG TERM...LEE
AVIATION...REV

Hazardous weather outlook, Apr 28, 1:20 PM CDT, 1 hour 6 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
120 PM CDT MON APR 28 2014

IAZ057>062-070>075-083>086-095>097-291830-
AUDUBON-GUTHRIE-DALLAS-POLK-JASPER-POWESHIEK-CASS-ADAIR-MADISON-
WARREN-MARION-MAHASKA-CLARKE-LUCAS-MONROE-WAPELLO-WAYNE-APPANOOSE-
DAVIS-
120 PM CDT MON APR 28 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

SCATTERED THUNDERSTORMS ARE FORECAST INTO TONIGHT. THUNDERSTORMS
WILL BE MOST LIKELY ACROSS SOUTHERN AND EASTERN AREAS...WHERE
THERE WILL BE A CHANCE FOR HAIL AND EVEN A COUPLE OF TORNADOES
THIS AFTERNOON INTO THE EARLY EVENING.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON.

IAZ081-082-092>094-291830-
ADAMS-UNION-TAYLOR-RINGGOLD-DECATUR-
120 PM CDT MON APR 28 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

ISOLATED THUNDERSTORMS ARE FORECAST TODAY INTO TONIGHT.
THERE IS A SLIGHT RISK OF A FEW STRONG STORMS ACROSS SOUTHERN
IOWA...WHERE THERE WILL BE A CHANCE FOR HAIL AND FUNNEL CLOUDS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED.

IAZ004>007-015>017-023>028-033>039-044>050-291830-
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-
120 PM CDT MON APR 28 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

ISOLATED TO SCATTERED MAINLY NON SEVERE THUNDERSTORMS ARE
FORECAST TODAY INTO TONIGHT.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED.

REV

In the hours before

Special weather statement, Apr 28, 8:30 AM CDT, 5 hours 56 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
830 AM CDT MON APR 28 2014

IAZ033-281430-
SAC IA-
830 AM CDT MON APR 28 2014

...STRONG THUNDERSTORMS CAPABLE OF PRODUCING SMALL HAIL...

AT 827 AM CDT...THE PUBLIC REPORTED A STRONG THUNDERSTORM WHICH
PRODUCED PEA SIZED HAIL NEAR BLACK HAWK LAKE...OR 12 MILES SOUTH OF
SAC CITY...MOVING NORTHWEST AT 35 MPH.

HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
SAC CITY...LAKE VIEW...BLACK HAWK LAKE...WALL LAKE...SCHALLER...
EARLY...AUBURN...NEMAHA...SAC CITY MUNICIPAL AIRPORT...BLACKHAWK LAKE
STATE PARK AND WALL LAKE MUNICIPAL AIRPORT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
OFFICE IN DES MOINES .

&&

LAT...LON 4256 9507 4236 9493 4222 9487 4222 9508
      4227 9520 4242 9533 4247 9532 4247 9537
      4249 9539 4256 9539
TIME...MOT...LOC 1327Z 149DEG 31KT 4225 9499

KOTENBERG

Special weather statement, Apr 28, 10:15 AM CDT, 4 hours 11 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1015 AM CDT MON APR 28 2014

IAZ004>007-015>017-023>028-033>039-281715-
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO-
POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN-
WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-
INCLUDING THE CITIES OF...ESTHERVILLE...ALGONA...FOREST CITY...
LAKE MILLS...NORTHWOOD...MANLY...EMMETSBURG...GARNER...BRITT...
KANAWHA...MASON CITY...CLEAR LAKE...POCAHONTAS...LAURENS...
ROLFE...FONDA...GILMORE CITY...HUMBOLDT...EAGLE GROVE...CLARION...
BELMOND...HAMPTON...PARKERSBURG...CLARKSVILLE...SHELL ROCK...
GREENE...APLINGTON...ALLISON...DUMONT...WAVERLY...SAC CITY...
LAKE VIEW...ODEBOLT...WALL LAKE...SCHALLER...EARLY...
ROCKWELL CITY...MANSON...LAKE CITY...POMEROY...FORT DODGE...
WEBSTER CITY...IOWA FALLS...ELDORA...ACKLEY...GRUNDY CENTER...
REINBECK...CONRAD...DIKE...WELLSBURG...WATERLOO...CEDAR FALLS
1015 AM CDT MON APR 28 2014

...STRONG EASTERLY WINDS DEVELOPING ACROSS NORTHERN IOWA...

EASTERLY WINDS HAVE INCREASED TO 25 TO 30 MPH WITH GUSTS TO NEAR
40 MPH THIS MORNING. THE WINDS WILL REMAIN BRISK INTO THE LATE
AFTERNOON AND DIMINISH THIS EVENING. LOOSE OBJECTS ARE LIKELY TO
BLOW AROUND AND TRAVEL WITH HIGH PROFILE VEHICLES MAY BE DIFFICULT
AT TIMES THROUGH THE DAY TODAY.

REV

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 27, 9:55 PM CDT	Special Weather Statement	DMX	Wayne	35 min
Apr 28, 8:30 AM CDT	Special Weather Statement	DMX	Sac	60 min
Apr 28, 1:29 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Guthrie	46 min
Apr 28, 2:04 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marion, Polk, Warren	41 min
Apr 28, 3:17 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marion	43 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.