Alert archive / Minnesota / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 1, NWS Grand Forks, ND

May 5, 2000Kittson County, Marshall County, Roseau County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at May 5, 2000, 8:12 PM CDT for Kittson County, Marshall County, Roseau County, Minnesota. It was in force for 33 min. 2 reports came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued
May 5, 2000, 8:12 PM CDT (01:12 UTC)
Expired
May 5, 2000, 8:45 PM CDT
In force
33 min
Issued by
NWS Grand Forks, ND
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Kittson County, MN, Marshall County, MN, Roseau County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 130 km from the middle of the area, began a volume at 01:11 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

TimeReportWhereRemark
May 5, 8:40 PM CDTHail 1.75Greenbush, MN
May 5, 8:42 PM CDTHail 0.88Karlstad, MN

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 1.2 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 2000-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 443 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 2000-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 245 square meters per square second.19395878Sfc1 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
443 J/kg
Mixed-layer CIN
-150 J/kg
Mixed-layer LCL
1590 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
245 m²/s²
0-3 km storm-relative helicity
497 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.8

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KFGF 060113
SVRFAR
MNC069-089-135-060145-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS
812 PM CDT FRI MAY 5 2000

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN MARSHALL COUNTY IN NORTHWEST MINNESOTA
  SOUTHEASTERN KITTSON COUNTY IN NORTHWEST MINNESOTA
  WEST CENTRAL ROSEAU COUNTY IN NORTHWEST MINNESOTA

* UNTIL 845 PM CDT

* AT 805 PM CDT...NATIONAL WEATHER SEVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 6 MILES SOUTH OF DONALDSON...OR ABOUT 25 MILES
  EAST OF GRAFTON...MOVING NORTHEAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  KARL8STAD AT 830 PM CDT
  LEO AT 845 PM CDT

REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.

LAT...LON 4855 9697 4840 9682 4868 9614 4887 9633

NNNN

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Grand Forks, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at May 5, 3:10 PM CDT, 5 hours 2 minutes earlier.

Area forecast discussion, May 5, 3:10 PM CDT, 5 hours 2 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
310 PM CDT FRI MAY 5 2000

FCST CHALLENGE...TSTMS TNGT...TEMPS AND RESIDUAL TSTMS TMRW.

SYNOPSIS...LOW LEVEL MOISTURE AND INSTABILITY CONTINUE TO POOL IN
EASTERN NORTH DAKOTA AND WEST CENTRAL MINNESOTA THIS AFTERNOON UNDER
A FAIRLY STRONG MID LVL CAP. A WARM FRONTAL BOUNDARY EXTENDS FM A
SFC LOW OVR THE BLACK HILLS...THROUGH SCNTRL ND INTO NCNTRL MN. WEAK
ELEVATED CONVECTION PERSISTS NORTH OF THIS BOUNDARY...FM EXTREME
NERN ND INTO NCNTRL MN.

NEAR TERM...A 40KT LOW LVL JET EXTENDS THROUGH ERN SD ATTM...AND IS
FCST TO ACCELERATE MOISTURE CONVERGENCE INTO ECNTRL ND FM LATE
AFTERNOON INTO THE EARLY EVENING. JET STRENGTH INCREASES TOWARDS
MIDNIGHT WITH MOISTURE FOCUS MOVING INTO THE NORTHERN RRV...SLOWLY
SHIFTING INTO NW MN AFTER MIDNIGHT. MESOSCALE DYNAMICS WILL AMPLIFY
THIS EVENING AND OVERNIGHT AS AN UPPER LEVEL DISTURBANCE APPROACHES
FROM THE WEST AND MOVES ALONG THE BOUNDARY. MCS COULD POSSIBLE
DEVELOP INTO NCNTRL ND THIS EVENING AND MOVE ACROSS THE NRN RRV WITH
THE LOW LEVEL JET FOCUS. LAYER QVECTOR FORCING SHOWS GOOD LOW LVL
CONVERGENCE ACRS ERN ND AND WRN MN TNGT...WITH MID AND UPR LVL
QVECTOR DIVERGENCE ACRS NRN PORTIONS OF THE AREA INTO SRN MAN. HAVE
UPDATED HWOFAR TO MENTION SVR THREAT NORTH OF A LINE FM
LISBON...FARGO TO PARK RAPIDS THIS EVENING AND OVERNIGHT. MODEL
GUIDANCE SUGGESTS BROAD AREA OF .25 TO .50 QPF ACROSS NRN PORTIONS
OF THE CWFA. FOCUS AREA OF GTE .50 QPF IS POSSIBLE IN NRN MN AS
POSSIBLE MCS STALLS TOWARDS MORNING. WITH PWS HOLDING AROUND 1.2
INCHES THIS SEEMS REASONABLE.

SATURDAY...ETA/AVN MODEL GUIDANCE HAS HANDLED NRN PLAINS SYSTEM WELL
LAST COUPLE RUNS SO WILL FOLLOW CLOSELY. RESIDUAL SWR/TSTM ACTIVITY
EXPECTED IN NERN ZONES THROUGH SAT AM AS SFC LOW PRES TRACKS INTO NW
MN. SFC BOUNDARY PUSHES BACK THROUGH MUCH OF FGF CWFA THROUGH MIDDAY
SAT WITH BLAYER WINDS SHIFTING WEST TO NORTHWEST THROUGH THE DAY.
COOLING H5 HEIGHTS AND AN APPCHG MID LVL SHTWV IN SRN CANADA SHUD
LEAD TO SOME DESTABILIZATION LATE SATURDAY SO WILL INCLUDE MENTION
OF SCT SHWRS AND ISOLD TSTMS INTO SAT PM.

MID TERM...SUNDAY IS INDICATED AS FAIRLY DRY AND STABLE...WITH WEST
TO NORTHWEST FLOW IN THE LOW LEVELS. FLOW ALOFT IS QUESTIONABLE AS
H3 JET REMAINS OVR THE AREA. SRN ZONES EXPECTED TO DESTABILIZE SUN
PM SO SCT SHRWS POSSIBLE.

EXTENDED...DE-AMPLIFICATION IN PATTERN EXPECTED AFTER WEEKEND AS
STONGER JET ENERGY CONCENTRATES FURTHER SOUTH TOWARD CENTRAL CA.
RESULTANT SOUTHWARD SHIFT IN JET-STREAM MEANS MORE ZONAL FLO PATTERN
HERE AND MAIN CYCLOGENESIS SOUTH OF CWA...CLOSER TO CENTRAL PLAINS.
SOUTHERN CWA COULD BE ON NORTHERN EDGE OF 1ST SYSTEM ON MONDAY...SO
WILL HOLD WITH CHANCE SHRA THERE WHICH IS IN CURRENT FORECAST.
ECMWF...THE MODEL WHICH GRABBED ONTO THIS PATTERN EARLIER THAN MRF
THIS WEEK...THEN ADVERTISES CLOSED U/L LO TO SKIRT NRN IA BY NEXT
WED. MRF SLIGHTLY DIFFERENT...WITH STONGER SD LOW BY 12Z WED AND
INVERTED TROF/THICKNESS RIDGE CENTERED OVER CWA. 00Z CANADIAN LESS
AMPLIFIED...WITH NOGAPS LEANING CLOSER TO MRF. OVERALL...LOOKS TO BE
CONTINUED UNSETTLED INTO MID-WEEK WITH SOMEWHAT COOLER REGIME BEFORE
SW FLO ALOFT REGENERATES BY END OF NEXT WEEK...ONCE AGAIN PUMPING UP
NORTHERN PLAINS RIDGE.

.FGF...NONE.

GUST/SOROKA

In the hours before

Local storm report, May 5, 2:22 PM CDT, 5 hours 50 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
122 PM CST FRI MAY 05 2000

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0730 PM    STEPHEN                   MN   1.75 INCH HAIL
05/05/00   MARSHALL                       HAIL OCCURRED FROM 1930 TO
                                          2000

0930 PM    WARROAD                   MN   .75 INCH HAIL
05/05/00   ROSEAU                         HAIL OCCURRED FROM 2130 TO
                                          2145 CDT

0230 AM    OSNABROCK                 ND   1.75 INCH HAIL
05/06/00   CAVALIER                       HAIL OCCURRED FROM 0230 TO
                                          0245 CDT

NNNN

The office that day

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

IssuedProductOfficeCountiesLasted
May 5, 8:44 PM CDTSevere Thunderstorm WarningFGFKittson, Marshall, Roseau46 min
May 5, 9:28 PM CDTSevere Thunderstorm WarningFGFBeltrami, Lake of the Woods, Roseau42 min
May 5, 9:28 PM CDTSevere Thunderstorm WarningFGFMarshall42 min
May 5, 10:03 PM CDTSevere Thunderstorm WarningFGFLake of the Woods37 min
May 5, 11:13 PM CDTSevere Thunderstorm WarningFGFKittson, Roseau32 min
May 5, 11:20 PM CDTSevere Thunderstorm WarningFGFLake of the Woods30 min
May 6, 12:12 AM CDTSevere Thunderstorm WarningFGFBeltrami, Clearwater28 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2000Every severe thunderstorm warning in 2000

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.