Alert archive / North Dakota / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 267, NWS Grand Forks, ND

August 8, 2001Grand Forks County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 8, 2001, 3:12 AM CDT for Grand Forks County, North Dakota. It was in force for 48 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Aug 8, 2001, 3:12 AM CDT (08:12 UTC)
Expired
Aug 8, 2001, 4:00 AM CDT
In force
48 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

County Grand Forks County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 45 km from the middle of the area, began a volume at 08:14 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
Aug 8, 3:30 AM CDTThunderstorm WindLarimore, NDTree branches were blown down.

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 7, 10:00 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 8.2 hours before the alert went out and 276 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, Bismarck Municip, ND at 00:00Z on 2001-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6234 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, Bismarck Municip, ND at 00:00Z on 2001-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 26 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
6234 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
2004 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
26 m²/s²
0-3 km storm-relative helicity
150 m²/s²
Significant tornado parameter
0.0
Supercell composite
15.2

Open this sounding in Storm Lab

The text

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

661 
WUUS53 KFGF 080812
SVRFAR
NDC035-080900-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS
312 AM CDT WED AUG 8 2001

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  CENTRAL GRAND FORKS COUNTY IN NORTHEAST NORTH DAKOTA.
  INCLUDING THE CITY OF GRAND FORKS...

* UNTIL 400 AM CDT.

* AT 309 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES WEST OF LARIMORE...OR ABOUT 31 MILES
  WEST OF GRAND FORKS...MOVEMENT WAS TO THE EAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  LARIMORE AT 315 AM...
  ARVILLA AT 325 AM...
  EMERADO AT 335 AM AND
  GRAND FORKS AT 355 AM.

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 AM WEDNESDAY
MORNING FOR NORTHWESTERN MINNESOTA AND SOUTHEAST NORTH DAKOTA. A
SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 400 AM
WEDNESDAY MORNING FOR EASTERN NORTH DAKOTA.


$$

14

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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 Aug 8, 2:52 AM CDT, 20 minutes earlier.

Area forecast discussion, Aug 8, 2:52 AM CDT, 20 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
255 AM CDT TUE AUG 7 2001

FORECAST CHALLENGE CONCERNS TEMPERATURES AND PCPN.

MODELS IN REASONABLE AGREEMENT WITH ETA COMING AROUND TO AVN
SOLUTION WITH FROPA AND LOW LEVEL FEATURES.

SMALL CLUSTER OF SVR TSRA OVR EAST CENTRAL ND TRACKING EASTWARD WITH
LARGER COMPLEX WORKING INTO NORTH CENTRAL ND. WILL MONITOR TRENDS
BUT LIKELY NEED AM MENTION OVER NORTHERN AND POSSIBLY SE AREAS FOR
AM.

COLD FRONT AT 12Z TO BE ORIENTED FROM WESTERN MB THROUGH SW ND TO
SHIFT EASTWARD TO ROUGHLY A INL-FAR-ABR LINE AT 00Z. APPROACHING MID
LEVEL TROUGH AND 700MB COLD ADVECTION TO GRADUALLY ERODE CAPPING.
ALONG AND AHEAD OF BOUNDARY AIRMASSS WILL REMAIN VERY MOIST AND
UNSTABLE. AS A RESULT...DEPENDING ON ACTUAL BOUNDARY/OUTFLOW
LOCATION LOOK FOR ANOTHER ROUND OF STRONG CONVECTION WITH BEST
SHOT/HIGHEST POPS  OVER SE ND AND MN. WILL ALSO NEED TO MAINTAIN
SOME SORT OF MENTION BEHIND BOUNDARY WITH APPROACH OF MID LEVEL
SHEAR AXIS. AS FAR AS TEMPS 70 DEWPOINTS WIDESPREAD ACROSS FA ATTM.
BASED ON EXPECTED COLD FRONT LOCATION SOUTHERN AREAS LAST TO SEE ANY
RELIEF AND WILL SEE AND HOT STEAMY DAY. AS A RESULT WILL CONTINUE
HEAT ADVISORY THIS AREA. NORTHERN AREAS WILL BE FIRST TO SEE COOLING
AND PCPN CLD COVER MAY LIMIT TEMPS TO A DEGREE.

COLD FRONT PUSHES THROUGH FA OVER FIRST HALF OF OVERNIGHT PERIOD.
WILL MAINTAIN HIGHEST POPS OVER SOUTHERN AND EASTERN ZONES. STRONG
850MB CAA IN WAKE OF BOUNDARY WHICH CONTINUES INTO THURSDAY.

SOME DRYING NOTED THURSDAY FROM INTEGRATED RH FIELDS AND CU RULES
POINT TO ATLEAST PARTIAL SUNSHINE AS HIGH PUSHES IN. MUCH COOLER
TEMPS INSTORE FOR REGION WITH NORTHWEST FLOW ALOFT TAKING OVER
ENDING CURRENT HEAT SPELL.

WITH WATCHES IN EFFECT UNTIL 5AM WILL LIKELY HOLD OFF ON ZONE
ISSUANCE UNTIL THEN.

.FGF...HEAT ADVISORY ALONG AND SOUTH OF A FAR-PKD LINE.

NG/GODON

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 11:51 PM CDTSevere Thunderstorm WarningFGFGriggs, Steele39 min
Aug 8, 12:26 AM CDTSevere Thunderstorm WarningFGFBarnes, Cass, Steele, Traill64 min
Aug 8, 2:45 AM CDTSevere Thunderstorm WarningFGFRamsey30 min
Aug 8, 5:53 PM CDTSevere Thunderstorm WarningFGFBenson52 min
Aug 8, 6:06 PM CDTTornado WarningFGFBenson39 min
Aug 8, 6:42 PM CDTTornado WarningFGFBenson, Ramsey48 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2001Every severe thunderstorm warning in 2001

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.