Alert archive / North Dakota / Flash Flood Warnings in 1997

Flash Flood Warning 23, NWS Grand Forks, ND

July 12, 1997Cavalier County, Towner County, North Dakota

NWS Grand Forks, ND issued this flash flood warning at Jul 12, 1997, 4:59 AM CDT for Cavalier County, Towner County, North Dakota. 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 counties it named.

The facts

Issued: Jul 12, 1997, 4:59 AM CDT (09:59 UTC)
Expired: Jul 12, 1997, 8:00 AM CDT
In force: 3 hr
Issued by: NWS Grand Forks, ND
Area: Whole counties

Counties Cavalier County, ND, Towner County, ND

The radar

The Minot AFB radar (KMBX), 152 km from the middle of the area, began a volume at 10:03 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

Bismarck Municip, ND (KBIS), launched 00:00Z, 10.0 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: 3242 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1128 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -54 m²/s²
0-3 km storm-relative helicity: -67 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 
TTAA00 KFAR 121000
FFWFAR
NDC095-019-121300-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
459 AM CDT SAT JUL 12 1997
 
THE NATIONAL WEATHER SERVICE IN EASTERN ND/GRAND FORKS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  800 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTH CENTRAL NORTH DAKOTA
 
   ...TOWNER COUNTY
 
IN NORTHEAST NORTH DAKOTA
 
   ...WESTERN CAVALIER COUNTY
 
...FLASH FLOOD WARNING EXTENDED AS HEAVY RAINS CONTINUE...
 
THE FLASH FLOOD WARNING HAS BEEN EXTENDED FOR WESTERN CAVALIER AND ALL
OF TOWNER COUNTIES UNTIL 8 AM CDT. THIS WARNING INCLUDES THE CITIES OF
LANGDON...WALES...ROCKLAKE AND CANDO.
 
AT 455 AM RADAR CONTINUED TO INDICATE STRONG THUNDERSTORMS MOVING ACROSS
CAVALIER AND TOWNER COUNTIES. ALTHOUGH THE THUNDERSTORMS HAVE WEAKENED
RADAR AND SATELLITE RAINFALL ESTIMATES PLACE UP TO 14 INCHES OF RAIN
HAS FALLEN IN THE WALES AREA OF CAVALIER COUNTY SINCE 11 PM FRIDAY
EVENING. SURROUNDING THIS AREA OF EXCESSIVE RAINS...A LARGE AREA OF 2 TO
4 INCHES OF RAIN HAS BEEN INDICATED FROM THE CANDO AND BISBEE AREAS TO
MUNICH AND NEAR LANGDON.
 
ALTHOUGH THE AREA OF STRONGEST THUNDERSTORMS HAS SHIFTED TO THE SOUTH...
AN ADDITIONAL ONE TO TWO INCHES OF RAIN MAY STILL FALL IN THE CAVALIER
AND TOWNER COUNTY AREAS BY 8AM.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT.  KNOW WHERE YOU
ARE RELATIVE TO STREAMS...RIVERS OR CREEKS WHICH CAN BECOME KILLERS
IN HEAVY RAIN.  CAMPERS SHOULD AVOID CAMPING ALONG STREAMS OR CREEKS
DURING HEAVY RAIN.
 
STAY TUNED TO RADIO...T.V. ...NOAA WEATHER RADIO AND CABLE T.V. OUTLETS
FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
EWENS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 1:45 AM CDT	Flash Flood Warning	FGF	Cavalier, Towner	3 hr

Nearby

Flash Flood Warnings in North Dakota, 1997 Every flash flood warning in 1997

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.