Alert archive / Minnesota / Flash Flood Warnings in 1997

Flash Flood Warning 25, NWS Grand Forks, ND

July 14, 1997Polk County, Minnesota

NWS Grand Forks, ND issued this flash flood warning at Jul 14, 1997, 5:14 AM CDT for Polk County, Minnesota. It was in force for 106 min. 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 14, 1997, 5:14 AM CDT (10:14 UTC)
Expired
Jul 14, 1997, 7:00 AM CDT
In force
106 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

County Polk County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 74 km from the middle of the area, began a volume at 10:13 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

International Fa, MN (KINL), launched 00:00Z, 10.2 hours before the alert went out and 246 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-pSkew-T log-p diagram, International Fa, MN at 00:00Z on 1997-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 832 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, International Fa, MN at 00:00Z on 1997-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
832 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
1253 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
0 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFAR 141016
FFWFAR
MNC119-141200-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
514 AM CDT MON JUL 14 1997
 
THE NATIONAL WEATHER SERVICE IN EASTERN ND/GRAND FORKS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  700 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHWEST MINNESOTA
 
   ...CENTRAL POLK COUNTY
 
THIS WARNING INCLUDES THE CITY OF ERSKINE.
 
AT 510 AM RADAR INDICATED A STATIONARY INTENSE THUNDERSTORM JUST NORTH
OF THE TOWN OF ERSKINE MINNESOTA...35 MILES SOUTH OF THIEF RIVER FALLS.
SINCE 4 AM DOPPLER RADAR ESTIMATES INDICATE AROUND 3 INCHES OF RAIN HAS
FALLEN IN THE ERSKINE AREA.
 
THIS STORM WILL CONTINUE TO AFFECT THE ERSKINE AND CENTRAL POLK COUNTY
AREA...INCLUDING PORTIONS OF THE POPLAR RIVER AND OAK LAKE AREAS OVER
THE NEXT 1 TO 2 HOURS. ADDITIONAL RAINFALLS OF BETWEEN 1 AND 3 INCHES
WILL BE POSSIBLE IN THE ABOVE MENTIONED AREAS.
 
IF FLASH FLOODING IS OBSERVED...MOVE QUICKLY TO HIGHER GROUND. DO NOT
ATTEMPT TO DRIVE OVER ROADWAYS COVERED WITH WATER...IT MAY HIDE A
WASHOUT.
EWENS

Nearby

Flash Flood Warnings in Minnesota, 1997Every 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.