Alert archive / Minnesota / Flash Flood Warnings in 2016

Flash Flood Warning 1, NWS Grand Forks, ND

May 30, 2016Polk County, Minnesota

NWS Grand Forks, ND issued this flash flood warning at May 30, 2016, 6:19 PM CDT for Polk County, Minnesota. It was in force for 3 hr. 2 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: May 30, 2016, 6:19 PM CDT (23:19 UTC)
Expired: May 30, 2016, 9:15 PM CDT
In force: 3 hr
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Flood severity: None

County Polk County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 63 km from the middle of the area, began a volume at 23:19 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

Time	Report	Where	Remark
May 30, 7:00 PM CDT	FLASH FLOOD	Crookston, MN	STREET FLOODING IN DOWNTOWN CROOKSTON.
May 30, 9:00 PM CDT	FLASH FLOOD	Crookston, MN	RAINFALL OF 3.7 TO 4 INCHES. FIELDS UNDER WATER, STREETS FULL OF WATER, PEOPLE KAYAKING IN THE STREETS.

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

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 11.3 hours before the alert went out and 258 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: 23 J/kg
Mixed-layer CIN: -93 J/kg
Mixed-layer LCL: 1114 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 118 m²/s²
0-3 km storm-relative helicity: 145 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

181 
WGUS53 KFGF 302319
FFWFGF
MNC119-310215-
/O.NEW.KFGF.FF.W.0001.160530T2319Z-160531T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
619 PM CDT MON MAY 30 2016

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL POLK COUNTY IN NORTHWESTERN MINNESOTA...

* UNTIL 915 PM CDT
    
* AT 617 PM CDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. FLASH FLOODING IS EXPECTED TO
  BEGIN SHORTLY. DOPPLER RADAR ESTIMATES OVER 2 INCHES OF RAIN HAS
  FALLEN WITH SLOW MOVING THUNDERSTORMS CONTINUING TO IMPACT THE
  AREA.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CROOKSTON.

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 4786 9651 4773 9649 4773 9670 4784 9672

$$

JAM

1 follow-up statement

515 
WGUS73 KFGF 310207
FFSFGF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
907 PM CDT MON MAY 30 2016

MNC119-310216-
/O.EXP.KFGF.FF.W.0001.000000T0000Z-160531T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
POLK MN-
907 PM CDT MON MAY 30 2016

...THE FLASH FLOOD WARNING FOR CENTRAL POLK COUNTY WILL EXPIRE AT 915
PM CDT...

THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO
POSE A THREAT. ADDITIONAL SHOWERS AND THUNDERSTORMS REMAIN POSSIBLE
THROUGH THE NIGHT. 

LAT...LON 4786 9651 4773 9649 4773 9670 4784 9672

$$

JAM

The office that day

Everything else NWS Grand Forks, ND issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 30, 9:33 AM CDT	River Flood Warning	FGF	Kittson	71 hr
May 30, 3:57 PM CDT	Special Weather Statement	FGF	Polk	33 min
May 30, 4:14 PM CDT	Severe Thunderstorm Warning	FGF	Polk	28 min
May 30, 4:32 PM CDT	Severe Thunderstorm Warning	FGF	Polk	31 min
May 30, 5:37 PM CDT	Special Weather Statement	FGF	Polk	53 min
May 30, 5:40 PM CDT	Severe Thunderstorm Warning	FGF	Polk	35 min
May 30, 5:50 PM CDT	Areal Flood Advisory	FGF	Polk	3 hr
May 30, 6:16 PM CDT	Severe Thunderstorm Warning	FGF	Polk	44 min

Nearby

Flash Flood Warnings in Minnesota, 2016 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.