Alert archive / Minnesota / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 257, NWS Grand Forks, ND

September 2, 2000Clay County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Sep 2, 2000, 3:15 PM CDT for Clay County, Minnesota. It was in force for 30 min. 1 report 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
Sep 2, 2000, 3:15 PM CDT (20:15 UTC)
Expired
Sep 2, 2000, 3:45 PM CDT
In force
30 min
Issued by
NWS Grand Forks, ND
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Clay County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 91 km from the middle of the area, began a volume at 20:14 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
Sep 2, 3:25 PM CDTHail 0.75Glyndon, 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

Aberdeen, SD (KABR), launched 12:00Z, 8.3 hours before the alert went out and 266 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, Aberdeen, SD at 12:00Z on 2000-09-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 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, Aberdeen, SD at 12:00Z on 2000-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 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
1 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
516 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
91 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 
WUUS53 KFGF 022015
SVRFAR
MNC027-022045-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS
315 PM CDT SAT SEP 2 2000

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CLAY COUNTY IN NORTHWEST MINNESOTA...

* UNTIL 345 PM CDT

* AT 309 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES SOUTH OF DILWORTH...OR ABOUT 7 MILES
  EAST OF FARGO...MOVEMENT WAS TO THE NORTHEAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  AVERILL AT 320 PM CDT...
  MUSKODA AT 325 PM CDT...
  HAWLEY AT 330 PM CDT...
  DALE AT 335 PM CDT...

REMEMBER SEV{ERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES WITH LITTLE OR NO ADVANCE WARNING.

LAT...LON 4691 9679 4675 9665 4687 9621 4712 9623

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 Sep 2, 10:05 AM CDT, 5 hours 10 minutes earlier.

Area forecast discussion, Sep 2, 10:05 AM CDT, 5 hours 10 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1005 AM CDT SAT SEP 2 2000

FORECAST PROBLEM FOR TODAY IS PCPN. LATEST VIS AND IR SATELLITE
IMAGERY SHOWS CWFA COVERED IN IFR DECK WITH COLDEST CLOUD TOPS
WORKING INTO E ND. LATEST MSAS SFC PRESSURE ANALYSIS HAS LOW
PRESSURE CENTERED IN SE MT WITH TROF EXTENDING THROUGH W SD TO
ANOTHER LOW IN CENTRAL NE. CWFA IS IN MOIST E-SE FLOW. 12Z 850MB UA
MAP SHOWS WARM FRONT EXTENDING THROUGH SE ND INTO WC MN...
COINCIDENTAL TO WHERE CURRENTLY HAVE STRONGEST CONVECTION. WITH REST
OF CWFA GETTING GENERAL SHRA/TSRA DUE TO WAA. WHEN COMPARING MSAS
PRESSURE ANALYSIS TO MODELS...ETA MATCHES BEST WITH AVN ALSO CLOSE.
MODELS KEEP PCPN OVER CWFA AS SHORTWAVE MOVES THROUGH...WITH BEST
POTENTIAL FOR STRONGER STORMS STILL IN S CWFA. ALL IN ALL...CURRENT
FORECAST HANDLING SITUATION WELL...WITH ONLY MINOR CHANGES NEEvDED.

.FGF...NONE

NG

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 2, 2:43 PM CDTSevere Thunderstorm WarningFGFClay32 min
Sep 2, 4:37 PM CDTSevere Thunderstorm WarningFGFClay28 min
Sep 2, 4:44 PM CDTFlash Flood WarningFGFClay4 hr
Sep 2, 5:07 PM CDTSevere Thunderstorm WarningFGFBecker28 min
Sep 2, 5:19 PM CDTSevere Thunderstorm WarningFGFMahnomen31 min
Sep 2, 5:36 PM CDTSevere Thunderstorm WarningFGFBecker, Clearwater29 min
Sep 2, 6:11 PM CDTSevere Thunderstorm WarningFGFHubbard29 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.