Alert archive / North Dakota / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 328, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 17, 2001, 3:42 PM CDT for Grand Forks County, Walsh County, North Dakota. It was in force for 48 min. 2 reports 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 17, 2001, 3:42 PM CDT (20:42 UTC)
- Expired
- Aug 17, 2001, 4:30 PM CDT
- In force
- 48 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
Counties Grand Forks County, ND, Walsh County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 71 km from the middle of the area, began a volume at 20:45 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 17, 4:00 PM CDT | Hail 0.75 | Grafton, ND | |
| Aug 17, 4:25 PM CDT | Hail 0.75 | Larimore, ND |
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
Bismarck Municip, ND (KBIS), launched 12:00Z, 8.7 hours before the alert went out and 279 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.
- Mixed-layer CAPE
- 55 J/kg
- Mixed-layer CIN
- -266 J/kg
- Mixed-layer LCL
- 1896 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 89 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
847 WUUS53 KFGF 172043 SVRFAR NDC035-099-172130- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS 342 PM CDT FRI AUG 17 2001 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN GRAND FORKS COUNTY IN NORTHEAST NORTH DAKOTA AND EASTERN WALSH COUNTY IN NORTHEAST NORTH DAKOTA. INCLUDING THE CITY OF GRAND FORKS... * UNTIL 430 PM CDT. * AT 339 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 2 MILES SOUTH OF MINTO...OR ABOUT 11 MILES SOUTH OF GRAFTON...MOVEMENT WAS TO THE SOUTH AT 30 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... ARDOCH AT 345 PM... POLAND AT 350 PM... ORR AT 355 PM AND GILBY AT 400 PM. A SPOTTER REPORTED DIME SIZE HAIL IN MINTO AT 340 PM CDT. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. && $$ 7 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 Aug 17, 2:55 PM CDT, 47 minutes earlier.
Area forecast discussion, Aug 17, 2:55 PM CDT, 47 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 255 PM CDT FRI AUG 17 2001 DISCUSSION ABREVIATED DUE TO SEVERE WEATHER IN AREA. FCST CHALLENGE...DURATION OF CONVECTION INTO THIS EVENING IN NW MN. NEAR TERM/ANALYSIS...SFC CDFRNT EXTENDING FM SFC LOW IN WRN ONT...VCNTY GFK...INTO NWRN SD....AND DROPPING SWD THROUGH THE FGF CWFA ATTM. CONVECTION HAS INTENSIFIED ALG AND AHD OF THIS FRONT FM DVL TO BJI...IN AREA OF MAX INSTABILITY. AREA PROGRESSES SWD THROUGH THE REMAINDER OF THE AFTERNOON AND EARLY EVENING...SO WILL INCLUDE MENTION OF EVENING STORMS ALG AND SOUTH OF A VALLEY CITY...MAYVILLE...TVF AND BDE LINE. AVN AND ETA HAVE SOME INITIAL DISPARITY THROUGH 00Z BUT LINE UP WELL 12-60HRS. EXPECT CLEARING RRV AND WEST TNGT WITH SOME RESIDUAL MVFR-VFR CIGS IN NW MN THROUGH THE OVERNIGHT HOURS. NWLY WINDS ROX-DTL-PKD LIKELY TO GO CALM AT SFC SO AREAS PATCHY FOG EXPECTED. SATURDAY...EXPECT LOW CLDS TO BREAK AND SCATTER THROUGH MIDDAY OVR NW MN...WITH MOSTLY CLEAR SKIES ELSEWHERE. SFC HIGH PRES DOMINATES SRN MAN INTO ND/MN AREA WITH LIGHT NLY BLAYER FLOW THROUGH DAY ON SAT. RETURN SLY FLOW DEVELOPS SUNDAY AHD OF APPROACHING SFC TROF. WILL INCLUDE SUN PM GROUP FOR TSTMS. WILL GO WITH SLIGHTLY WARMER NGM MOS TEMPS TROUGH PACKAGE. EXTENDED...MRF...UKMET AND CANADIAN MODELS SIMILAR...WITH ECMWF QUITE DIFFERENT. UPPER LEVEL W FLOW DOMINATES...WITH STG SHRTWV ACTIVITY THROUGH EXTENDED PERIOD. EACH DAY HAS TSTM EXPECTATION WITH SIG MCS AND ADDN HEAVY RAINS SUGGESTED TUES PM INTO WED. .FGF...NONE. GUST/NG
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 2:08 PM CDT | Severe Thunderstorm Warning | FGF | Walsh | 52 min |
| Aug 17, 3:04 PM CDT | Severe Thunderstorm Warning | FGF | Pembina, Walsh | 41 min |
| Aug 17, 3:26 PM CDT | Severe Thunderstorm Warning | FGF | Barnes, Steele | 49 min |
| Aug 17, 3:55 PM CDT | Severe Thunderstorm Warning | FGF | Traill | 50 min |
| Aug 17, 4:35 PM CDT | Severe Thunderstorm Warning | FGF | Cass, Traill | 40 min |
| Aug 17, 5:00 PM CDT | Severe Thunderstorm Warning | FGF | Barnes, Cass | 45 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.