Alert archive / North Dakota / Flash Flood Warnings in 2015

Flash Flood Warning 1, NWS Grand Forks, ND

May 28, 2015Ransom County, Richland County, Sargent County, North Dakota

NWS Grand Forks, ND issued this flash flood warning at May 28, 2015, 6:32 PM CDT for Ransom County, Richland County, Sargent County, North Dakota. It was in force for 12 hr. 3 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 28, 2015, 6:32 PM CDT (23:32 UTC)
Expired: May 29, 2015, 6:30 AM CDT
In force: 12 hr
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Flood severity: None

Counties Ransom County, ND, Richland County, ND, Sargent County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 128 km from the middle of the area, began a volume at 23:34 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 28, 8:15 PM CDT	HEAVY RAIN 2.55	3 E Mcleod, ND
May 28, 10:30 PM CDT	FLASH FLOOD	Mcleod, ND	HEAVY RAINS OF FROM 3 TO 4 INCHES PRODUCED FLOODING OF DITCHES...FIELDS AND FARM ACCESS ROADS ACROSS PORTIONS OF EASTERN SANDOUN TOWNSHIP.
May 28, 11:00 PM CDT	FLASH FLOOD	3 Nnw Wyndmere, ND	HEAVY RAINS OF FROM 3 TO 4 INCHES PRODUCED FLOODING OF DITCHES...FIELDS AND FARM ACCESS ROADS ACROSS PORTIONS OF WESTEND AND HOMESTEAD TOWNSHIP.

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

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 11.5 hours before the alert went out and 194 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: 51 J/kg
Mixed-layer CIN: -157 J/kg
Mixed-layer LCL: 1431 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: -5 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

761 
WGUS53 KFGF 282332
FFWFGF
NDC073-077-081-291130-
/O.NEW.KFGF.FF.W.0001.150528T2332Z-150529T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
632 PM CDT THU MAY 28 2015

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN RANSOM COUNTY IN SOUTHEASTERN NORTH DAKOTA...
  CENTRAL SARGENT COUNTY IN SOUTHEASTERN NORTH DAKOTA...
  NORTHWESTERN RICHLAND COUNTY IN SOUTHEASTERN NORTH DAKOTA...

* UNTIL 630 AM CDT FRIDAY
    
* AT 629 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING 
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO THREE INCHES OF RAIN HAVE 
  ALREADY FALLEN IN AREAS. FLASH FLOODING IS EXPECTED TO BEGIN 
  SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  GWINNER...MILNOR...FORMAN...WYNDMERE...WALCOTT...RUTLAND AND
  CHRISTINE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DONT DROWN.

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

&&

LAT...LON 4596 9757 4612 9786 4662 9709 4662 9678
      4661 9677 4660 9677 4659 9676 4639 9674

$$

HOPKINS

2 follow-up statements

881 
WGUS73 KFGF 290311
FFSFGF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1011 PM CDT THU MAY 28 2015

NDC073-077-081-291130-
/O.CON.KFGF.FF.W.0001.000000T0000Z-150529T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
RANSOM ND-SARGENT ND-RICHLAND ND-
1011 PM CDT THU MAY 28 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 AM CDT FRIDAY
FOR SOUTHEASTERN RANSOM...CENTRAL SARGENT AND NORTHWESTERN RICHLAND
COUNTIES...

AT 1009 PM CDT...DOPPLER RADAR INDICATED SHOWERS CONTINUING TO 
PRODUCE RAIN ACROSS THE WARNED AREA MAINTAINING THE THREAT FOR  
FLASH FLOODING.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
GWINNER...MILNOR...FORMAN...WYNDMERE...WALCOTT...RUTLAND AND
CHRISTINE.

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 4596 9757 4612 9786 4662 9709 4662 9678
      4661 9677 4660 9677 4659 9676 4639 9674

$$

HOPKINS

672 
WGUS73 KFGF 291132
FFSFGF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
632 AM CDT FRI MAY 29 2015

NDC073-077-081-291140-
/O.EXP.KFGF.FF.W.0001.000000T0000Z-150529T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
RANSOM ND-SARGENT ND-RICHLAND ND-
632 AM CDT FRI MAY 29 2015

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN RANSOM...CENTRAL SARGENT
AND NORTHWESTERN RICHLAND COUNTIES HAS EXPIRED...

THE HEAVY RAIN HAS ENDED...AND FLASH FLOODING IS NO LONGER EXPECTED 
TO POSE A THREAT. HOWEVER...A FLOOD ADVISORY IS IN EFFECT INTO THE 
EARLY AFTERNOON HOURS FOR MINOR FLOODING IN POOR DRAINAGE AREAS. 

LAT...LON 4596 9757 4612 9786 4662 9709 4662 9678
      4661 9677 4660 9677 4659 9676 4639 9674

$$

TG

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 7:18 PM CDT	Special Weather Statement	FGF	Cass	57 min
May 28, 2:28 PM CDT	Special Weather Statement	FGF	Barnes	62 min
May 28, 3:24 PM CDT	Special Weather Statement	FGF	Steele	66 min
May 28, 4:54 PM CDT	Special Weather Statement	FGF	Richland	66 min
May 28, 4:58 PM CDT	Special Weather Statement	FGF	Walsh	62 min
May 28, 5:11 PM CDT	Tornado Warning	FGF	Walsh	29 min
May 28, 5:28 PM CDT	Special Weather Statement	FGF	Grand Forks	62 min
May 28, 6:14 PM CDT	Special Weather Statement	FGF	Barnes	61 min
May 28, 6:21 PM CDT	Special Weather Statement	FGF	Richland, Sargent	54 min

Nearby

Flash Flood Warnings in North Dakota, 2015 Every flash flood warning in 2015

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.