Alert archive / Iowa / Flash Flood Warnings in 2014

Flash Flood Warning 40, NWS Des Moines, IA

June 30, 2014Black Hawk County, Tama County, Iowa

NWS Des Moines, IA issued this flash flood warning at Jun 30, 2014, 2:00 PM CDT for Black Hawk County, Tama County, Iowa. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 30, 2014, 2:00 PM CDT (19:00 UTC)
Expired: Jun 30, 2014, 8:00 PM CDT
In force: 6 hr
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Flood severity: None

Counties Black Hawk County, IA, Tama County, IA

The radar

The Des Moines radar (KDMX), 137 km from the middle of the area, began a volume at 19:04 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.

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 7.0 hours before the alert went out and 171 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: 1426 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 544 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 253 m²/s²
0-3 km storm-relative helicity: 262 m²/s²
Significant tornado parameter: 2.3
Supercell composite: 15.0

Open this sounding in Storm Lab

The text

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

081 
WGUS53 KDMX 301900
FFWDMX
IAC013-171-010100-
/O.NEW.KDMX.FF.W.0040.140630T1900Z-140701T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
200 PM CDT MON JUN 30 2014

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN BLACK HAWK COUNTY IN NORTHEAST IOWA...
  NORTHEASTERN TAMA COUNTY IN CENTRAL IOWA...

* UNTIL 800 PM CDT MONDAY
    
* AT 157 PM CDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING 
  HEAVY RAIN ENTERING THE WARNED AREA. ONE TO TWO INCHES OF RAIN 
  WILL FALL FROM THIS STORM...WHICH COMBINED WITH THE HEAVY RAIN 
  THAT FELL LAST NIGHT...WILL CAUSE A RENEWED FLASH FLOOD THREAT 
  SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  WATERLOO...CEDAR FALLS...EVANSDALE...JESUP...LA PORTE CITY...
  HUDSON...ELK RUN HEIGHTS...CROSSROADS MALL...WASHBURN...RAYMOND...
  GILBERTVILLE AND TF CLARK STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

&&

LAT...LON 4230 9207 4230 9229 4221 9230 4221 9255
      4230 9256 4230 9254 4247 9253 4247 9255
      4248 9251 4253 9208 4247 9208 4247 9207
      4243 9206

$$

SKOW

4 follow-up statements

286 
WGUS73 KDMX 301945
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
245 PM CDT MON JUN 30 2014

IAC013-171-010100-
/O.CON.KDMX.FF.W.0040.000000T0000Z-140701T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BLACK HAWK IA-TAMA IA-
245 PM CDT MON JUN 30 2014

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 800 PM CDT MONDAY
FOR SOUTHERN BLACK HAWK AND NORTHEASTERN TAMA COUNTIES...

AT 244 PM CDT...TRAINED WEATHER SPOTTERS REPORTED FLASH FLOODING IN 
SOUTHERN WATERLOO. UP TO TWO INCHES OF RAIN HAVE ALREADY FALLEN. 
FLASH FLOODING IS ALREADY OCCURRING.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
WATERLOO...CEDAR FALLS...EVANSDALE...JESUP...LA PORTE CITY...
HUDSON...ELK RUN HEIGHTS...CROSSROADS MALL...WASHBURN...RAYMOND...
GILBERTVILLE AND TF CLARK STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

&&

LAT...LON 4230 9207 4230 9229 4221 9230 4221 9255
      4230 9256 4230 9254 4247 9253 4247 9255
      4248 9251 4253 9208 4247 9208 4247 9207
      4243 9206

$$

SKOW

431 
WGUS73 KDMX 302141
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
441 PM CDT MON JUN 30 2014

IAC013-171-010100-
/O.CON.KDMX.FF.W.0040.000000T0000Z-140701T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BLACK HAWK IA-TAMA IA-
441 PM CDT MON JUN 30 2014

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 800 PM CDT MONDAY
FOR SOUTHERN BLACK HAWK AND NORTHEASTERN TAMA COUNTIES...

AT 440 PM CDT...DOPPLER RADAR INDICATED MORE THUNDERSTORMS 
APPROACHING THE WARNED AREA IN THE NEXT COUPLE OF HOURS. THIS WILL 
EXACERBATE FLASH FLOODING THAT IS ALREADY OCCURRING ACROSS PORTIONS 
OF THE WARNED AREA. FLASH FLOODING WILL CONTINUE INTO TONIGHT.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
WATERLOO...CEDAR FALLS...EVANSDALE...JESUP...LA PORTE CITY...
HUDSON...ELK RUN HEIGHTS...CROSSROADS MALL...WASHBURN...RAYMOND...
GILBERTVILLE AND TF CLARK STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

&&

LAT...LON 4230 9207 4230 9229 4221 9230 4221 9255
      4230 9256 4230 9254 4247 9253 4247 9255
      4248 9251 4253 9208 4247 9208 4247 9207
      4243 9206

$$

LEE

603 
WGUS73 KDMX 302351
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
651 PM CDT MON JUN 30 2014

IAC013-171-010100-
/O.CON.KDMX.FF.W.0040.000000T0000Z-140701T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BLACK HAWK IA-TAMA IA-
651 PM CDT MON JUN 30 2014

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 800 PM CDT MONDAY
FOR SOUTHERN BLACK HAWK AND NORTHEASTERN TAMA COUNTIES...

AT 651 PM CDT...LOCAL LAW ENFORCEMENT REPORTED THAT NUMEROUS ROADS 
REMAIN FLOODED ACROSS THE AREA DUE TO MULTIPLE ROUNDS OF HEAVY RAIN 
TODAY.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
WATERLOO...CEDAR FALLS...EVANSDALE...JESUP...LA PORTE CITY...
HUDSON...ELK RUN HEIGHTS...CROSSROADS MALL...WASHBURN...RAYMOND...
GILBERTVILLE AND TF CLARK STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4230 9207 4230 9229 4221 9230 4221 9255
      4230 9256 4230 9254 4247 9253 4247 9255
      4248 9251 4253 9208 4247 9208 4247 9207
      4243 9206

$$

LEE

874 
WGUS73 KDMX 010050
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
750 PM CDT MON JUN 30 2014

IAC013-171-010100-
/O.EXP.KDMX.FF.W.0040.000000T0000Z-140701T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BLACK HAWK IA-TAMA IA-
750 PM CDT MON JUN 30 2014

...THE FLASH FLOOD WARNING FOR SOUTHERN BLACK HAWK AND NORTHEASTERN
TAMA COUNTIES WILL EXPIRE AT 800 PM CDT...

THE HEAVY RAIN HAS ENDED...AND FLASH FLOODING IS NO LONGER EXPECTED 
TO POSE A THREAT. HOWEVER...MANY ROADS AND LOW LYING AREAS REMAIN 
AFFECTED BY SLOWLY RECEDING FLOOD WATERS...THEREFORE AN AREAL FLOOD 
WARNING HAS BEEN ISSUED.

LAT...LON 4230 9207 4230 9229 4221 9230 4221 9255
      4230 9256 4230 9254 4247 9253 4247 9255
      4248 9251 4253 9208 4247 9208 4247 9207
      4243 9206

$$

LEE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 7:02 PM CDT	Tornado Warning	DMX	Hamilton, Webster	43 min
Jun 29, 7:29 PM CDT	Severe Thunderstorm Warning	DMX	Butler, Franklin	46 min
Jun 29, 7:32 PM CDT	Flash Flood Watch	DMX	Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 39 more	22 hr
Jun 29, 7:34 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Greene, Webster	41 min
Jun 29, 7:36 PM CDT	Tornado Warning Tornado observed	DMX	Hamilton, Hardin	39 min
Jun 29, 7:37 PM CDT	Severe Thunderstorm Warning	DMX	Carroll, Greene	53 min
Jun 29, 7:59 PM CDT	Severe Thunderstorm Warning	DMX	Bremer, Butler	17 min
Jun 29, 8:08 PM CDT	Severe Thunderstorm Warning	DMX	Grundy, Hardin	52 min
Jun 29, 8:15 PM CDT	Tornado Warning	DMX	Grundy, Hardin	30 min
Jun 29, 8:24 PM CDT	Flash Flood Warning	DMX	Hamilton, Hardin	6 hr
Jun 29, 8:41 PM CDT	Tornado Warning	DMX	Black Hawk, Tama	34 min
Jun 29, 8:43 PM CDT	Tornado Warning	DMX	Grundy, Tama	32 min
Jun 29, 8:44 PM CDT	Flash Flood Warning	DMX	Black Hawk, Grundy, Hardin, Tama	6 hr
Jun 29, 8:46 PM CDT	River Flood Warning	DMX	Webster	3 days
Jun 29, 8:49 PM CDT	Severe Thunderstorm Warning	DMX	Ringgold, Taylor, Union	41 min
Jun 29, 9:08 PM CDT	River Flood Warning	DMX	Marshall	5 days
Jun 29, 9:11 PM CDT	Tornado Warning Tornado observed	DMX	Black Hawk, Tama	34 min
Jun 29, 9:22 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Madison, Union, Warren	38 min
Jun 29, 9:47 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Lucas, Marion, Warren	43 min
Jun 29, 10:44 PM CDT	Severe Thunderstorm Warning	DMX	Carroll, Greene	46 min
Jun 29, 11:02 PM CDT	Special Weather Statement	DMX	Jasper, Mahaska, Poweshiek	58 min
Jun 30, 2:30 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Pocahontas, Sac	60 min
Jun 30, 2:42 AM CDT	Areal Flood Warning	DMX	Black Hawk, Tama	6 hr
Jun 30, 3:34 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Greene, Webster	41 min
Jun 30, 4:03 AM CDT	River Flood Warning	DMX	Polk, Story	63 hr
Jun 30, 4:03 AM CDT	River Flood Warning	DMX	Jasper, Marion, Polk	5 days
Jun 30, 4:03 AM CDT	River Flood Warning	DMX	Polk	7 days
Jun 30, 4:03 AM CDT	River Flood Warning	DMX	Davis, Wapello	3 days
Jun 30, 4:08 AM CDT	Severe Thunderstorm Warning	DMX	Boone, Greene, Hamilton, Story, Webster	52 min
Jun 30, 4:15 AM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Winnebago, Worth	45 min
Jun 30, 4:23 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Greene, Webster	41 min
Jun 30, 6:09 AM CDT	Flash Flood Warning	DMX	Calhoun, Sac	10 hr
Jun 30, 9:00 AM CDT	Severe Thunderstorm Warning	DMX	Audubon, Cass	30 min
Jun 30, 9:12 AM CDT	Severe Thunderstorm Warning	DMX	Sac	48 min
Jun 30, 9:29 AM CDT	Severe Thunderstorm Warning	DMX	Audubon, Guthrie	46 min
Jun 30, 9:37 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Sac	38 min
Jun 30, 10:09 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Webster	51 min
Jun 30, 10:13 AM CDT	Severe Thunderstorm Warning	DMX	Audubon, Dallas, Guthrie	42 min
Jun 30, 10:13 AM CDT	Severe Thunderstorm Warning	DMX	Crawford, Sac	47 min
Jun 30, 10:50 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Humboldt, Pocahontas, Webster	40 min
Jun 30, 10:55 AM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Webster, Wright	38 min
Jun 30, 10:57 AM CDT	Special Weather Statement	DMX	Boone	63 min
Jun 30, 10:59 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Crawford, Greene, Sac	46 min
Jun 30, 11:06 AM CDT	Severe Thunderstorm Warning	DMX	Carroll, Crawford, Sac	54 min
Jun 30, 11:11 AM CDT	River Flood Warning	DMX	Black Hawk, Bremer, Butler	50 hr
Jun 30, 11:15 AM CDT	River Flood Warning	DMX	Black Hawk	5 days
Jun 30, 11:18 AM CDT	River Flood Warning	DMX	Black Hawk, Bremer, Butler	3 days
Jun 30, 11:20 AM CDT	River Flood Warning	DMX	Black Hawk, Butler	3 days
Jun 30, 11:23 AM CDT	River Flood Warning	DMX	Story	69 hr
Jun 30, 11:24 AM CDT	Severe Thunderstorm Warning	DMX	Boone, Greene	51 min
Jun 30, 11:36 AM CDT	Severe Thunderstorm Warning	DMX	Boone, Calhoun, Carroll, Greene, Hamilton, Webster	39 min
Jun 30, 11:42 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Crawford, Greene, Pocahontas, Sac	48 min
Jun 30, 11:44 AM CDT	River Flood Warning	DMX	Boone, Hamilton, Webster	4 days
Jun 30, 11:48 AM CDT	Severe Thunderstorm Warning	DMX	Audubon, Guthrie	42 min
Jun 30, 11:50 AM CDT	Severe Thunderstorm Warning	DMX	Franklin, Wright	24 min
Jun 30, 12:04 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Audubon, Cass, Guthrie	41 min
Jun 30, 12:07 PM CDT	River Flood Warning	DMX	Polk	8 days
Jun 30, 12:12 PM CDT	Flash Flood Warning	DMX	Audubon	6 hr
Jun 30, 12:12 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Hamilton, Hardin, Story, Webster	48 min
Jun 30, 12:37 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Dallas, Guthrie, Madison	53 min
Jun 30, 12:44 PM CDT	Tornado Warning	DMX	Adair, Dallas, Guthrie, Madison	31 min
Jun 30, 12:49 PM CDT	Flash Flood Warning	DMX	Boone, Hamilton, Story, Webster	6 hr
Jun 30, 12:56 PM CDT	Tornado Warning	DMX	Marshall, Story	34 min
Jun 30, 12:59 PM CDT	Severe Thunderstorm Warning	DMX	Grundy, Hamilton, Hardin, Marshall, Story	46 min
Jun 30, 1:10 PM CDT	Special Weather Statement	DMX	Polk	65 min
Jun 30, 1:10 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Polk	50 min
Jun 30, 1:16 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Madison, Marion, Polk, Warren	59 min
Jun 30, 1:25 PM CDT	Flash Flood Warning	DMX	Dallas, Polk	6 hr
Jun 30, 1:29 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Grundy, Hardin, Marshall, Tama	46 min
Jun 30, 1:38 PM CDT	Flash Flood Warning	DMX	Grundy, Hardin, Marshall, Story, Tama	6 hr
Jun 30, 1:46 PM CDT	Flash Flood Warning	DMX	Adair, Dallas, Guthrie	6 hr
Jun 30, 1:46 PM CDT	Tornado Warning	DMX	Marion, Warren	29 min
Jun 30, 1:50 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Mahaska, Marion, Poweshiek	40 min
Jun 30, 2:00 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marshall, Poweshiek, Tama	45 min
Jun 30, 2:03 PM CDT	Tornado Warning	DMX	Black Hawk, Tama	27 min
Jun 30, 2:06 PM CDT	Special Weather Statement	DMX	Mahaska, Marion	69 min
Jun 30, 2:12 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Mahaska, Marion, Poweshiek, Warren	63 min
Jun 30, 2:12 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Tama	34 min
Jun 30, 2:17 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marion, Warren	28 min
Jun 30, 2:24 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer	21 min

Nearby

Flash Flood Warnings in Iowa, 2014 Every flash flood 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.