Alert archive / Minnesota / Flash Flood Warnings in 1997

Flash Flood Warning 16, NWS Grand Forks, ND

June 28, 1997Clearwater County, Mahnomen County, Polk County, Minnesota

NWS Grand Forks, ND issued this flash flood warning at Jun 28, 1997, 1:11 AM CDT for Clearwater County, Mahnomen County, Polk County, Minnesota. 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
Jun 28, 1997, 1:11 AM CDT (06:11 UTC)
Expired
Jun 28, 1997, 4:15 AM CDT
In force
3 hr
Issued by
NWS Grand Forks, ND
Area
Whole counties

Counties Clearwater County, MN, Mahnomen County, MN, Polk County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 110 km from the middle of the area, began a volume at 06:15 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, 6.2 hours before the alert went out and 221 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 1997-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2313 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 1997-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 90 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
2313 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
1650 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
90 m²/s²
0-3 km storm-relative helicity
137 m²/s²
Significant tornado parameter
0.5
Supercell composite
8.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFAR 280613
FFWFAR
MNC029-119-087-280915-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
111 AM CDT SAT JUN 28 1997
 
THE NATIONAL WEATHER SERVICE IN EASTERN ND/GRAND FORKS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  415 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHWEST MINNESOTA
 
   ...CLEARWATER COUNTY...EASTERN POLK COUNTY
 
IN WEST CENTRAL MINNESOTA
 
   ...MAHNOMEN COUNTY
 
A CLUSTER OF STRONG THUNDERSTORMS HAVE MOVED ACROSS PORTIONS OF EASTERN
POLK...CLEARWATER AND MAHNOMEN COUNTIES OF NORTHWEST MINNESOTA LATE THIS
EVENING PRODUCING VERY HEAVY RAIN. RAINFALL AMOUNTS OF UP TO THREE
INCHES HAVE BEEN ESTIMATED BY DOPPLER RADAR. THESE HEAVY RAINS HAVE
FALLEN OVER AREAS WHICH ARE ALLREADY SATURATED FROM TORRENTIAL RAINS
WHICH FEEL EARLIER IN THE WEEK.
 
LAW ENFORCEMENT HAS REPORTED SOME ROADS UNDERWATER IN EASTERN POLK
COUNTY. HEAVY RAINFALL IS EXPECTED TO CONTINUE ACROSS THESE AREAS FOR
THE NEXT HOUR OR TWO BEFORE TAPERING OFF.
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOODS AND FLASH FLOODS.  IF FLASH FLOODING IS
OBSERVED...ACT QUICKLY.  MOVE UP TO ESCAPE FLOOD WATE2RS.  DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
 
 
VOELKER

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 27, 7:04 PM CDTSevere Thunderstorm WarningFGFMarshall41 min
Jun 27, 7:27 PM CDTSevere Thunderstorm WarningFGFRoseau33 min
Jun 27, 7:32 PM CDTSevere Thunderstorm WarningFGFLake of the Woods28 min
Jun 27, 7:43 PM CDTSevere Thunderstorm WarningFGFMarshall47 min
Jun 27, 8:03 PM CDTSevere Thunderstorm WarningFGFBeltrami42 min
Jun 27, 8:49 PM CDTSevere Thunderstorm WarningFGFBeltrami26 min
Jun 27, 9:31 PM CDTSevere Thunderstorm WarningFGFBeltrami44 min
Jun 27, 10:11 PM CDTSevere Thunderstorm WarningFGFBeltrami49 min
Jun 27, 10:32 PM CDTSevere Thunderstorm WarningFGFMarshall28 min
Jun 27, 10:49 PM CDTSevere Thunderstorm WarningFGFClearwater26 min
Jun 27, 10:58 PM CDTSevere Thunderstorm WarningFGFBeltrami47 min
Jun 27, 11:15 PM CDTSevere Thunderstorm WarningFGFClearwater, Polk30 min
Jun 27, 11:48 PM CDTSevere Thunderstorm WarningFGFClearwater27 min
Jun 27, 11:54 PM CDTSevere Thunderstorm WarningFGFNorman36 min
Jun 28, 12:13 AM CDTSevere Thunderstorm WarningFGFClearwater, Mahnomen, Polk32 min
Jun 28, 12:32 AM CDTSevere Thunderstorm WarningFGFBeltrami, Hubbard28 min
Jun 28, 12:36 AM CDTSevere Thunderstorm WarningFGFNorman39 min
Jun 28, 12:44 AM CDTSevere Thunderstorm WarningFGFClearwater, Mahnomen, Polk31 min
Jun 28, 1:14 AM CDTSevere Thunderstorm WarningFGFClearwater, Mahnomen31 min
Jun 28, 1:29 AM CDTSevere Thunderstorm WarningFGFHubbard31 min
Jun 28, 1:45 AM CDTSevere Thunderstorm WarningFGFBecker30 min
Jun 28, 1:47 AM CDTSevere Thunderstorm WarningFGFNorman28 min
Jun 28, 2:13 AM CDTSevere Thunderstorm WarningFGFNorman32 min
Jun 28, 2:40 AM CDTSevere Thunderstorm WarningFGFMahnomen35 min
Jun 28, 2:54 AM CDTSevere Thunderstorm WarningFGFBecker36 min
Jun 28, 3:29 AM CDTSevere Thunderstorm WarningFGFBecker31 min
Jun 28, 9:16 AM CDTSevere Thunderstorm WarningFGFOtter Tail29 min
Jun 28, 9:31 AM CDTSevere Thunderstorm WarningFGFWilkin44 min
Jun 28, 9:47 AM CDTSevere Thunderstorm WarningFGFOtter Tail28 min
Jun 28, 10:12 AM CDTSevere Thunderstorm WarningFGFWilkin48 min
Jun 28, 10:21 AM CDTSevere Thunderstorm WarningFGFOtter Tail54 min
Jun 28, 11:00 AM CDTFlash Flood WarningFGFOtter Tail4 hr
Jun 28, 11:27 AM CDTSevere Thunderstorm WarningFGFWilkin33 min
Jun 28, 12:21 PM CDTFlash Flood WarningFGFWilkin2 hr
Jun 28, 1:03 PM CDTSevere Thunderstorm WarningFGFOtter Tail27 min
Jun 28, 1:10 PM CDTSevere Thunderstorm WarningFGFWadena35 min

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.