Alert archive / Iowa / Flash Flood Warnings in 2016
Flash Flood Warning 1, NWS Quad Cities, IA
NWS Quad Cities, IA issued this flash flood warning at May 27, 2016, 8:37 PM CDT for 5 counties in 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
- May 27, 2016, 8:37 PM CDT (01:37 UTC)
- Expired
- May 28, 2016, 2:30 AM CDT
- In force
- 6 hr
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Iowa County, IA, Jefferson County, IA, Johnson County, IA, Keokuk County, IA, Washington County, IA
The radar
The Quad Cities radar (KDVN), 121 km from the middle of the area, began a volume at 01:40 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 00:00Z, 1.6 hours before the alert went out and 128 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.
- Mixed-layer CAPE
- 296 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 989 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.2
The text
As transmitted.
292
WGUS53 KDVN 280137
FFWDVN
IAC095-101-103-107-183-280730-
/O.NEW.KDVN.FF.W.0001.160528T0137Z-160528T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
837 PM CDT FRI MAY 27 2016
THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHWESTERN JEFFERSON COUNTY IN SOUTHEASTERN IOWA...
SOUTHWESTERN JOHNSON COUNTY IN EAST CENTRAL IOWA...
EASTERN KEOKUK COUNTY IN SOUTHEASTERN IOWA...
SOUTHEASTERN IOWA COUNTY IN EAST CENTRAL IOWA...
NORTHWESTERN WASHINGTON COUNTY IN SOUTHEASTERN IOWA...
* UNTIL 230 AM CDT
* AT 833 PM CDT...DOPPLER RADAR INDICATED A NEARLY STATIONARY LINE OF
THUNDERSTORMS PRODUCING HEAVY RAIN FROM IOWA CITY TO ABINGDON.
RAINFALL AMOUNTS 1.5 TO 3 INCHES HAS FALLEN IN THIS AREA SINCE
6 PM. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.
ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE
WARNED AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.
&&
LAT...LON 4167 9184 4168 9161 4090 9218 4116 9218
4116 9235
$$
SHEETS2 follow-up statements
133
WGUS73 KDVN 280247
FFSDVN
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
947 PM CDT FRI MAY 27 2016
IAC095-101-103-107-183-280730-
/O.CON.KDVN.FF.W.0001.000000T0000Z-160528T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JEFFERSON IA-JOHNSON IA-KEOKUK IA-IOWA IA-WASHINGTON IA-
947 PM CDT FRI MAY 27 2016
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 230 AM CDT FOR
NORTHWESTERN JEFFERSON...SOUTHWESTERN JOHNSON...EASTERN KEOKUK...
SOUTHEASTERN IOWA AND NORTHWESTERN WASHINGTON COUNTIES...
AT 940 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. BETWEEN 2 AND 4 INCHES OF RAIN
HAS FALLEN ALREADY. FLASH FLOODING IS LIKELY UNDERWAY.
ADDITIONAL RAINFALL AMOUNTS BETWEEN 1 AND 2 INCHES ARE POSSIBLE IN
THE WARNED AREA. THE STORMS HAVE STARTED TO WEAKEN AND SLOWLY DRIFT
SOUTHEAST WHICH SHOULD BEGIN TO SLOWLY LESSEN THE THREAT LATER THIS
EVENING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.
IT IS IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS, RIVERS,
OR CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS IN THE
WARNED SHOULD EVACUATE AREAS NEAR STREAMS, CREEKS OR OTHER LOW-LYING
AREAS.
&&
LAT...LON 4167 9184 4168 9161 4090 9218 4116 9218
4116 9235
$$
WOLF298
WGUS73 KDVN 280727
FFSDVN
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
227 AM CDT SAT MAY 28 2016
IAC095-101-103-107-183-280733-
/O.EXP.KDVN.FF.W.0001.000000T0000Z-160528T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JEFFERSON IA-JOHNSON IA-KEOKUK IA-IOWA IA-WASHINGTON IA-
227 AM CDT SAT MAY 28 2016
...THE FLASH FLOOD WARNING FOR NORTHWESTERN JEFFERSON...SOUTHWESTERN
JOHNSON...EASTERN KEOKUK...SOUTHEASTERN IOWA AND NORTHWESTERN
WASHINGTON COUNTIES WILL EXPIRE AT 230 AM CDT...
THE HEAVY RAIN HAS ENDED. LIGHT TO MODERATE RAIN WILL CONTINUE
THROUGH 4 AM WHICH MAY PRODUCE AN ADDITIONAL 0.25 TO 0.5 INCHES OF
RAIN.
RADAR ESTIMATES THAT 2 TO 4 INCHES OF RAIN FELL IN A NARROW BAND
FROM COSGROVE...TO JUST WEST OF PACKWOOD AND ABINGDON.
CALLS TO LOCAL SHERIFF DEPARTMENTS INDICATE NO KNOWN FLOODING
PROBLEMS. FLOODING IS NO LONGER EXPECTED TO POSE A THREAT. PLEASE
CONTINUE TO HEED ANY REMAINING ROAD CLOSURES.
LAT...LON 4167 9184 4168 9161 4090 9218 4116 9218
4116 9235
$$
08The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 7:19 PM CDT | Special Weather Statement | DVN | Johnson | 41 min |
| May 27, 7:51 PM CDT | Special Weather Statement | DVN | Jefferson, Johnson, Keokuk, Linn, Washington | 54 min |
| May 28, 2:40 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Delaware, Dubuque, Jones | 50 min |
| May 28, 3:44 PM CDT | Special Weather Statement | DVN | Clinton, Scott | 46 min |
| May 28, 4:25 PM CDT | Severe Thunderstorm Warning | DVN | Clinton, Scott | 50 min |
Nearby
Flash Flood Warnings in Iowa, 2016Every flash flood warning in 2016
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.