Alert archive / North Dakota / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 307, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 14, 2001, 6:40 PM CDT for Griggs County, North Dakota. It was in force for 50 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 14, 2001, 6:40 PM CDT (23:40 UTC)
- Expired
- Aug 14, 2001, 7:30 PM CDT
- In force
- 50 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
County Griggs County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 69 km from the middle of the area, began a volume at 23:43 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 14, 6:50 PM CDT | Hail 0.75 | Sutton, 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 14, 2:30 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 11.7 hours before the alert went out and 201 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
- 944 J/kg
- Mixed-layer CIN
- -232 J/kg
- Mixed-layer LCL
- 1363 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- 71 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
255 WUUS53 KFGF 142340 SVRFAR NDC039-150030- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS 640 PM CDT TUE AUG 14 2001 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHWESTERN GRIGGS COUNTY IN SOUTHEAST NORTH DAKOTA. * UNTIL 730 PM CDT. * AT 633 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES NORTHWEST OF SUTTON...OR ABOUT 44 MILES NORTHWEST OF VALLEY CITY...MOVEMENT WAS TO THE SOUTHEAST AT 15 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... SUTTON AT 655 PM AND REVERE AT 710 PM. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM TUESDAY EVENING FOR NORTHWESTERN MINNESOTA AND EASTERN NORTH DAKOTA. $$ 14 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 14, 2:05 PM CDT, 4 hours 35 minutes earlier.
Area forecast discussion, Aug 14, 2:05 PM CDT, 4 hours 35 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 205 PM CDT TUE AUG 14 2001 AFTER FURTHER DISCUSSION...WILL GO WITH FLASH FLOOD WATCH INSTEAD OF FLOOD WATCH AS PREV DISCUSSED IN COORD CALLS. -------------------------- PREV AFD... PCPN CHANCES HIGHLIGHT CHALLENGES THIS FCST. AFTER INTER-OFFICE COORDINATION AND COORD WITH DLH/BIS WILL ISSUE FLASH FLOOD WATCH FOR FAR NE ND AND NW MN (GFK-BJI AND POINTS NORTH) FOR TONIGHT. .CURRENT... 18Z SFC MAP SHOWS LOW NORTH OF WINNIPEG WITH TROUGH SOUTHWEST TO NORTH OF MINOT TO ANOTHER WK LOW IN WCNTRL ND. TSRA CONTINUES TO DEVELOP ALONG THIS BOUNDARY AND MOVE EAST...MAINLY ACROSS SRN MB. COLD FRONT LOCATED A BIT FARTHER NORTHWEST AND BEGINNING TO CATCH UP TO BOUNDARY NORTH OF MINOT AND CAUSING INCREASED CONVECTION ON KMBX RADAR. 00Z ETA GFK SOUNDING SHOWS FREEZING LEVEL AT 12.6 KFT. 12Z MODELS ARE IN FAIR AGREEMENT...AND LOOK AT UCAR MM5 AND WRF SUPPORTS THEIR SOLNS OF BRINGING HEAVIEST PCPN DEVELOPING IN FAR NE ND LATE THIS AFTN AND THEN OVER NW MN BTWN 00-06Z. .SHORT TERM... FRONT TO SAG SOUTHEAST ACROSS CWFA TONIGHT...REACHING FAR SE CWFA NR 12Z. EXPECT CONVECTION ALONG FRONT TONIGHT...ENDING NW ZONES BEFORE MIDNIGHT. HEAVIEST RAIN POTENTIAL PER DAY1 QPF AND MODEL QPF FROM GFK-TVF-BJI-BDE ZONES...WHERE THEY HAVE HAD THE MOST RAINS THIS SUMMER. AFTER COORD WILL ISSUE AN FFA FOR TONIGHT FOR THAT AREA AS THAT AREA STANDS THE BEST CHC OF WIDESPREAD 1+ INCH AMOUNTS. SVR POTENTIAL ALSO GOOD LATE THIS AFTN/EVE. MSAS LI TO -10 IN CNTRL ND WITH THETA E CONVERGENCE CONTINUING ALONG BOUNDARY TO OUR NORTHWEST. GOOD SHEAR PROFILE AS WELL S-SW WINDS SFC-85H AND W-NW AT 70H SO SUPERCELLS PSBL. .LONGER TERM... OVERNIGHT CONVECTION TO BE EXITING CWFA EARLY WED AM...THEN 50H TROUGH TO DROP SOUTH THROUGH THE AREA 18-00Z WITH 50H TEMPS TO -16C. ETA SOUNDINGS SHOW CONVECTIVE TEMPS NR 70...WHICH WILL BE REACHED. THUS WILL MAINTAIN POPS FOR TSRA WEDNESDAY PER CURRENT ZONES. TROUGH WILL PASS OUT OF AREA WED EVENING FOLLOWED BY HIGH PRESSURE ON THURSDAY. .EXTENDED...MODELS IN DECENT AGREEMENT THRU DAY 4 AND THEN SLOWLY DIVERGE AFTER THEN. MRF SHOWING CONTINUITY WITH PREVIOUS RUN UNTIL DAY 6 WITH LATEST RUNS DEPICTING A LESS AMPLIFIED PATTERN OVER THE NRN TIER OF THE U.S. BY THEN. 5H LOW OVER THE NE PACIFIC MOVES ENE INTO WRN CANADA AS TROF DROPS INTO THE ERN U.S. DAY 3 THRU 5. 5H RDG MOVES E INTO THE NRN PLAINS BRINGING DRY AND MILD CONDITIONS FOR THE WEEKEND. CHC FOR PCPN FRI INITIAL TROF PASSAGE AND AGAIN ON MON AS SECOND SHRT WV MOVES THRU IN NEARLY ZONAL FLOW. BEST CHC FOR PCPN TO BE OVER THE NE ZONES FRI AND WL BREAK UP EXTENDED TO REFLECT THIS. NEAR NORMAL LOWS AND BLO NORMAL HIGHS TO PREVAIL THRU THE EXTENDED. .FGF...FLASH FLOOD WATCH TONIGHT FOR EXTREME NORTHEAST NORTH DAKOTA AND NORTHWEST MINNESOTA...FOR AREAS ALONG AND NORTH OF A GRAND FORKS TO BEMIDJI LINE. DR/RT
In the hours before
Local storm report, Aug 14, 4:40 PM CDT, 2 hours before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
440 PM CDT TUE AUG 14 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0220 PM 3 SE HANSBORO ND .75 INCH HAIL
08/14/01 TOWNER
0248 PM 3 SE SARLES ND .75 INCH HAIL
08/14/01 CAVALIER
0312 PM 4 W DRESDEN ND .75 INCH HAIL
08/14/01 CAVALIER
0328 PM LANGDON ND .75 INCH HAIL
08/14/01 CAVALIER
0345 PM 3 NE OSNABROCK ND WIND DAMAGE
08/14/01 CAVALIER TREES DOWN
0354 PM 3 SE STARKWEATHER ND .75 INCH HAIL
08/14/01 RAMSEY
0406 PM 3 SW MOUNTAIN ND .75 INCH HAIL
08/14/01 PEMBINA
0413 PM 12 E DEVILS LAKE ND 60 MPH TSTM GUST
08/14/01 RAMSEY
NNNNSpecial weather statement, Aug 14, 5:03 PM CDT, 1 hour 37 minutes before
MNZ001-NDZ027-150005- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 503 PM CDT TUE AUG 14 2001 ...STRONG WINDS TO AFFECT GRAND FORKS AND POLK COUNTIES THIS EVENING... A LINE OF THUNDERSTORMS WILL MOVE INTO GRAND FORKS BY 530 PM...THEN INTO POLK COUNTY THEREAFTER. WIND GUSTS UP TO 45 MPH ARE POSSIBLE IN GRAND FORKS AND SURROUNDING COMMUNITIES. EVEN THOUGH THESE WINDS ARE NOT STRONG ENOUGH TO PROMPT A SEVERE THUNDERSTORM WARNING AT THIS TIME...THE WINDS MAY AFFECT ALREADY DAMAGED TREES IN THE REGION. IN ADDITION...ANY BRANCHES OR LIMBS ON THE GROUND MAY ALSO BLOW AROUND. A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 9 PM CDT FOR THE AREA...AND A FLASH FLOOD WATCH IS IN EFFECT TONIGHT. SO LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS THROUGH THE OVERNIGHT. DJK
Local storm report, Aug 14, 6:40 PM CDT, 0 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
640 PM CDT TUE AUG 14 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0325 PM LANGDON ND WIND DAMAGE
08/14/01 CAVALIER LARGE BRANCHES DOWN
0435 PM 4 NE STEPHEN MN .88 INCH HAIL
08/14/01 MARSHALL
0445 PM GRAFTON ND WIND DAMAGE
08/14/01 WALSH TREES DOWN
0449 PM 3 N DRAYTON ND WIND DAMAGE
08/14/01 PEMBINA TREES DOWN
0505 PM STEPHEN MN WIND DAMAGE
08/14/01 MARSHALL TREE DOWN
0510 PM 3 E KARLSTAD MN .88 INCH HAIL
08/14/01 KITTSON
0535 PM 3 NE RADIUM MN 60 MPH TSTM GUST
08/14/01 MARSHALL
0548 PM 20 NW THIEF RIVER FALLS MN .75 INCH HAIL
08/14/01 PENNINGTON
0609 PM CROOKSTON MN .75 INCH HAIL
08/14/01 POLK
0613 PM 2 W CROOKSTON MN 1.75 INCH HAIL
08/14/01 POLK
0620 PM HUOT MN 1.75 INCH HAIL
08/14/01 RED LAKE
NNNNThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 14, 2:18 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier, Towner | 42 min |
| Aug 14, 2:59 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier | 46 min |
| Aug 14, 3:40 PM CDT | Severe Thunderstorm Warning | FGF | Ramsey | 35 min |
| Aug 14, 3:45 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier, Pembina | 45 min |
| Aug 14, 4:07 PM CDT | Severe Thunderstorm Warning | FGF | Walsh | 38 min |
| Aug 14, 4:28 PM CDT | Severe Thunderstorm Warning | FGF | Pembina | 47 min |
| Aug 14, 4:53 PM CDT | Severe Thunderstorm Warning | FGF | Walsh | 37 min |
| Aug 14, 5:15 PM CDT | Severe Thunderstorm Warning | FGF | Eddy | 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.