Alert archive / North Dakota / Flash Flood Warnings in 2009

Flash Flood Warning 3, NWS Grand Forks, ND

March 27, 2009Cass County, North Dakota

NWS Grand Forks, ND issued this flash flood warning at Mar 27, 2009, 2:33 AM CDT for Cass County, North Dakota. It took effect at Mar 27, 2009, 2:39 AM CDT. 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: Mar 27, 2009, 2:33 AM CDT (07:33 UTC)
In effect from: Mar 27, 2009, 2:39 AM CDT
Expired: Mar 27, 2009, 8:30 AM CDT
In force: 6 hr
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Flood severity: None

County Cass County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 83 km from the middle of the area, began a volume at 07:34 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.

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 7.6 hours before the alert went out and 252 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1098 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: -29 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.

000 
WGUS53 KFGF 270739
FFWFGF
NDC017-271330-
/O.NEW.KFGF.FF.W.0003.090327T0739Z-090327T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
233 AM CDT FRI MAR 27 2009

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EXTREME EAST CENTRAL CASS COUNTY IN SOUTHEAST NORTH DAKOTA...

* UNTIL 830 AM CDT

* AT 229 AM CDT...THE FARGO POLICE DEPARTMENT IS ISSUING A MANDATORY 
  EVACUATION OF ALL RESIDENCES EAST OF 4TH STREET SOUTH BETWEEN
  SOUTH RIVER ROAD AND LINDENWOOD DRIVE. THERE IS A FLOOD PROTECTION
  BREECH AT LINDEN AVENUE...EAST OF 4TH STREET SOUTH. DUE TO THE 
  IMMEDIATE THREAT OF RISING WATER...THE CITY OF FARGO IS ORDERING A 
  MANDATORY EVACUATION.  

* RESIDENTS OF THIS AREA OF THE CITY SHOULD IMMEDIATELY PROCEED WEST 
  OF THE NEIGHBORHOOD.  RESIDENTS WHO DO NOT HAVE AN ALTERNATIVE 
  PLACE TO STAY MAY SEEK EMERGENCY SHELTER AT FARGO SOUTH CAMPUS 
  II...AGASSIZ. ADDITIONAL SHELTERS WILL BE DESIGNATED AS NEEDED.

* RESIDENTS SHOULD STAY TUNED TO LOCAL RADIO BROADCASTS FOR 
  ADDITIONAL EVACUATION AND TEMPORARY SHELTER INFORMATION.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN THE DANGERS OF FLASH FLOODING
ARE HARD TO RECOGNIZE.

IF YOU LIVE NEAR THE LOCATION OF THE DIKE FAILURE MOVE TO HIGHER 
GROUND.

LAT...LON 4687 9680 4689 9678 4688 9678 4687 9679
      4686 9679

$$

NG

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 27, 8:28 AM CDT	Flash Flood Warning	FGF	Eddy, Griggs, Nelson	26 min
Mar 27, 8:45 AM CDT	Flash Flood Warning	FGF	Cass	7 hr
Mar 27, 1:54 PM CDT	Flash Flood Warning	FGF	Ransom	7 hr

Nearby

Flash Flood Warnings in North Dakota, 2009 Every flash flood warning in 2009

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.