Alert archive / Iowa / Flash Flood Warnings in 2002

Flash Flood Warning 13, NWS Quad Cities, IA

June 4, 2002Linn County, Iowa

NWS Quad Cities, IA issued this flash flood warning at Jun 4, 2002, 8:43 AM CDT for Linn County, Iowa. It was in force for 3 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 4, 2002, 8:43 AM CDT (13:43 UTC)
Expired: Jun 4, 2002, 12:00 PM CDT
In force: 3 hr
Issued by: NWS Quad Cities, IA
Area: Counties, with a storm outline in the text

County Linn County, IA

The radar

The Quad Cities radar (KDVN), 99 km from the middle of the area, began a volume at 13:44 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, 1.7 hours before the alert went out and 104 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: 223 J/kg
Mixed-layer CIN: -151 J/kg
Mixed-layer LCL: 672 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 316 m²/s²
0-3 km storm-relative helicity: 310 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

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

831 
WGUS53 KDVN 041343
FFWMLI
IAC113-041700-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
844 AM CDT TUE JUN 4 2002

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  LINN COUNTY IN EAST CENTRAL IOWA

* UNTIL NOON CDT

* AT 838 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN WERE LOCATED OVER THE
  WARNED AREA.

* NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATES INDICATE THAT UP  
  TO 4 INCHES OF RAIN HAS FALLEN OVER PORTIONS OF LINN COUNTY...
  WITH HOURLY RAINFALL AMOUNTS UP TO 1.5 INCHES. THIS RAIN... 
  THE ADDITIONAL EXPECTED HEAVY RAINFALL THIS MORNING WILL CAUSE
  LOCAL STREAMS AND RIVERS TO RISE RAPIDLY AND OVERFLOW THEIR BANKS.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND
UNDERPASSES...AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.
DO NOT DRIVE THROUGH AREAS WHERE WATER COVERS THE ROAD. IF CAUGHT IN 
RISING WATER....LEAVE YOUR VEHICLE FOR HIGHER GROUND. 

LAT...LON 4227 9138 4189 9140 4189 9183 4228 9181

SHEETS





$$

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 3, 10:07 PM CDT	Severe Thunderstorm Warning	DVN	Dubuque	53 min
Jun 3, 10:16 PM CDT	Severe Thunderstorm Warning	DVN	Jackson	54 min
Jun 3, 11:13 PM CDT	Flash Flood Warning	DVN	Buchanan, Delaware	6 hr
Jun 4, 4:06 AM CDT	Flash Flood Warning	DVN	Dubuque	5 hr
Jun 4, 5:24 AM CDT	Flash Flood Warning	DVN	Jackson, Jones	5 hr
Jun 4, 6:24 AM CDT	Flash Flood Warning	DVN	Buchanan, Delaware	6 hr
Jun 4, 7:25 AM CDT	Flash Flood Warning	DVN	Cedar, Clinton, Muscatine, Scott	6 hr
Jun 4, 8:55 AM CDT	Severe Thunderstorm Warning	DVN	Buchanan, Delaware	50 min
Jun 4, 9:06 AM CDT	Flash Flood Warning	DVN	Dubuque	5 hr
Jun 4, 10:02 AM CDT	Severe Thunderstorm Warning	DVN	Linn	43 min
Jun 4, 10:20 AM CDT	Flash Flood Warning	DVN	Jackson, Jones	5 hr
Jun 4, 10:31 AM CDT	Severe Thunderstorm Warning	DVN	Cedar, Muscatine	44 min
Jun 4, 11:04 AM CDT	Severe Thunderstorm Warning	DVN	Delaware	41 min
Jun 4, 11:43 AM CDT	Flash Flood Warning	DVN	Buchanan, Cedar, Clinton, Delaware, Dubuque, Jackson and 4 more	6 hr

Nearby

Flash Flood Warnings in Iowa, 2002 Every flash flood warning in 2002

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.