Alert archive / Iowa / Tornado Warnings in 2014

Tornado Warning 48, NWS Des Moines, IA

July 6, 2014Black Hawk County, Grundy County, Tama County, Iowa

NWS Des Moines, IA issued this tornado warning at Jul 6, 2014, 7:50 PM CDT for Black Hawk County, Grundy County, Tama County, Iowa. It was in force for 25 min. 5 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
Jul 6, 2014, 7:50 PM CDT (00:50 UTC)
Expired
Jul 6, 2014, 8:15 PM CDT
In force
25 min
Issued by
NWS Des Moines, IA
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

Counties Black Hawk County, IA, Grundy County, IA, Tama County, IA

The radar

The Des Moines radar (KDMX), 111 km from the middle of the area, began a volume at 00:50 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

TimeReportWhereRemark
Jul 6, 7:54 PM CDTFUNNEL CLOUD2 Wnw Morrison, IANWS EMPLOYEE REPORTS NEW FUNNEL CLOUD DEVELOPING 2 WNW OF MORRISON
Jul 6, 7:58 PM CDTTORNADO2 Nw Reinbeck, IATORNADO TOUCHDOWN WITH DEBRIS BALL AND FAMRSTEAD HIT
Jul 6, 7:59 PM CDTTORNADONe Reinbeck, IASEVERAL REPORTS FROM SEVERAL TRAINED SPOTTERS OF TORNADO NEAR REINBECK
Jul 6, 8:12 PM CDTTORNADO2 Wsw Reinbeck, IANWS EMPLOYEE REPORTED NEW TORNADO FORMING 2 WSW REINBECK AT 812 PM. DELAYED REPORT
Jul 6, 8:16 PM CDTTORNADO3 E Lincoln, IADEBRIS CLOUD NOTED

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

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 0.8 hours before the alert went out and 190 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-pSkew-T log-p diagram, Davenport, at 00:00Z on 2014-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1325 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 00:00Z on 2014-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 76 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1325 J/kg
Mixed-layer CIN
-174 J/kg
Mixed-layer LCL
1280 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
76 m²/s²
0-3 km storm-relative helicity
195 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.9

Open this sounding in Storm Lab

The text

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

138 
WFUS53 KDMX 070050
TORDMX
IAC013-075-171-070115-
/O.NEW.KDMX.TO.W.0048.140707T0050Z-140707T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
750 PM CDT SUN JUL 6 2014

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN BLACK HAWK COUNTY IN NORTHEAST IOWA...
  NORTH CENTRAL TAMA COUNTY IN CENTRAL IOWA...
  EAST CENTRAL GRUNDY COUNTY IN CENTRAL IOWA...

* UNTIL 815 PM CDT
    
* AT 750 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR REINBECK...OR 6 MILES EAST OF GRUNDY
  CENTER...MOVING SOUTHEAST AT 30 MPH.

  HAZARD...TORNADO. 

  SOURCE...RADAR INDICATED ROTATION. 

  IMPACT...EXPECT DAMAGE TO MOBILE HOMES...ROOFS AND VEHICLES. 

* LOCATIONS IMPACTED INCLUDE...
  REINBECK AND MORRISON. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A
VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND
PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4219 9260 4228 9268 4236 9274 4243 9264
      4235 9241
TIME...MOT...LOC 0050Z 311DEG 27KT 4235 9265 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

AWB
3 follow-up statements
571 
WWUS53 KDMX 070053
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
753 PM CDT SUN JUL 6 2014

IAC013-075-171-070115-
/O.CON.KDMX.TO.W.0048.000000T0000Z-140707T0115Z/
BLACK HAWK IA-TAMA IA-GRUNDY IA-
753 PM CDT SUN JUL 6 2014

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM CDT FOR
SOUTHWESTERN BLACK HAWK...NORTH CENTRAL TAMA AND EAST CENTRAL GRUNDY
COUNTIES...
        
AT 752 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR REINBECK...OR 7 MILES EAST OF GRUNDY CENTER...MOVING
SOUTHEAST AT 30 MPH.

HAZARD...TORNADO. 

SOURCE...WEATHER SPOTTERS REPORTED A FUNNEL CLOUD. 

IMPACT...EXPECT DAMAGE TO MOBILE HOMES...ROOFS AND VEHICLES. 

LOCATIONS IMPACTED INCLUDE...
REINBECK AND MORRISON. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A
VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND
PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4219 9260 4228 9268 4236 9274 4243 9264
      4235 9241
TIME...MOT...LOC 0052Z 311DEG 27KT 4234 9263 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

AWB
987 
WWUS53 KDMX 070102
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
802 PM CDT SUN JUL 6 2014

IAC013-075-171-070115-
/O.CON.KDMX.TO.W.0048.000000T0000Z-140707T0115Z/
BLACK HAWK IA-TAMA IA-GRUNDY IA-
802 PM CDT SUN JUL 6 2014

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM CDT FOR
SOUTHWESTERN BLACK HAWK...NORTH CENTRAL TAMA AND EAST CENTRAL GRUNDY
COUNTIES...
    
AT 801 PM CDT...A CONFIRMED TORNADO WAS LOCATED OVER REINBECK...OR 9
MILES EAST OF GRUNDY CENTER...MOVING SOUTHEAST AT 30 MPH.

HAZARD...TORNADO. 

SOURCE...WEATHER SPOTTERS CONFIRMED TORNADO. AT 8:00 PM A TORNADO 
         WAS REPORTED WEST OF REINBECK 

IMPACT...EXPECT DAMAGE TO MOBILE HOMES...ROOFS AND VEHICLES. 

LOCATIONS IMPACTED INCLUDE...
REINBECK AND MORRISON. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. TAKE COVER NOW! MOVE TO A
BASEMENT OR AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY
BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4219 9260 4228 9268 4232 9271 4241 9259
      4235 9241
TIME...MOT...LOC 0101Z 311DEG 27KT 4232 9259 

TORNADO...OBSERVED
HAIL...<.75IN

$$

AWB
161 
WWUS53 KDMX 070108
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
808 PM CDT SUN JUL 6 2014

IAC013-075-171-070117-
/O.EXP.KDMX.TO.W.0048.000000T0000Z-140707T0115Z/
BLACK HAWK IA-TAMA IA-GRUNDY IA-
808 PM CDT SUN JUL 6 2014

...THE TORNADO WARNING FOR SOUTHWESTERN BLACK HAWK...NORTH CENTRAL
TAMA AND EAST CENTRAL GRUNDY COUNTIES WILL EXPIRE AT 815 PM CDT...
    
THE TORNADO WARNING THAT WAS PREVIOUSLY IN EFFECT HAS BEEN REISSUED 
FOR GRUNDY BLACK HAWK AND TAMA COUNTIES AND IS IN EFFECT UNTIL 845 
PM. PLEASE REFER TO THAT BULLETIN FOR THE LATEST SEVERE WEATHER 
INFORMATION.

REMEMBER...A TORNADO WARNING STILL REMAINS IN EFFECT FOR PORTIONS OF 
GRUNDY BLACK HAWK AND TAMA COUNTIES.

LAT...LON 4219 9260 4228 9268 4232 9271 4241 9259
      4235 9241
TIME...MOT...LOC 0104Z 311DEG 27KT 4232 9259 

$$

AWB

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 7:19 PM CDTSevere Thunderstorm WarningDMXBlack Hawk, Bremer41 min
Jul 6, 7:27 PM CDTSpecial Weather StatementDMXTama48 min
Jul 6, 7:37 PM CDTSpecial Weather StatementDMXDallas23 min
Jul 6, 8:05 PM CDTTornado Warning Tornado observedDMXBlack Hawk, Grundy, Tama40 min
Jul 6, 8:28 PM CDTSpecial Weather StatementDMXMadison62 min
Jul 6, 8:40 PM CDTSpecial Weather StatementDMXMadison35 min
Jul 6, 8:45 PM CDTTornado WarningDMXTama30 min
Jul 6, 8:50 PM CDTTornado Warning Tornado observedDMXDallas, Madison25 min
Jul 6, 8:51 PM CDTTornado WarningDMXJasper, Poweshiek24 min
Jul 6, 9:10 PM CDTTornado Warning Tornado observedDMXJasper, Mahaska, Poweshiek35 min
Jul 6, 9:20 PM CDTSpecial Weather StatementDMXPoweshiek55 min
Jul 6, 9:22 PM CDTSpecial Weather StatementDMXMahaska53 min
Jul 6, 9:24 PM CDTSpecial Weather StatementDMXMadison51 min
Jul 6, 9:45 PM CDTTornado WarningDMXJasper, Mahaska, Poweshiek13 min
Jul 6, 10:01 PM CDTSevere Thunderstorm WarningDMXMahaska, Marion44 min
Jul 6, 10:18 PM CDTSevere Thunderstorm WarningDMXMahaska, Wapello42 min
Jul 6, 10:20 PM CDTTornado WarningDMXMahaska, Marion40 min
Jul 6, 10:26 PM CDTSpecial Weather StatementDMXDecatur34 min
Jul 6, 10:53 PM CDTSevere Thunderstorm WarningDMXDavis, Wapello37 min
Jul 7, 3:38 AM CDTFlash Flood WatchDMXAdair, Adams, Appanoose, Cass, Clarke, Davis and 6 more19 hr
Jul 7, 5:24 PM CDTSpecial Weather StatementDMXAdams36 min
Jul 7, 6:27 PM CDTSpecial Weather StatementDMXAdams, Taylor48 min
Jul 7, 6:50 PM CDTSevere Thunderstorm WarningDMXAdams, Ringgold, Taylor, Union40 min

Nearby

Tornado Warnings in Iowa, 2014Every tornado warning in 2014Tornadoes 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.