Alert archive / North Dakota / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 183, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 21, 2001, 12:43 AM CDT for Benson County, North Dakota. It was in force for 47 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
- Jul 21, 2001, 12:43 AM CDT (05:43 UTC)
- Expired
- Jul 21, 2001, 1:30 AM CDT
- In force
- 47 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Benson County, ND
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 21, 1:00 AM CDT | Thunderstorm Wind 52 E | Selz, ND | |
| Jul 21, 1:15 AM CDT | Thunderstorm Wind | Esmond, ND | Tree 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 21, 12:00 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 5.7 hours before the alert went out and 171 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
- 2408 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 1484 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 220 m²/s²
- Significant tornado parameter
- 1.4
- Supercell composite
- 10.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KFGF 210545 SVRFAR NDC005-210630- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS 1243 AM CDT SAT JUL 21 2001 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... BENSON COUNTY IN NORTHEAST NORTH DAKOTA. * UNTIL 130 AM CDT. * AT 1237 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE LEADING EDGE OF SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM 57 MILES WEST OF DEVILS LAKE TO 57 MILES EAST OF GARRISON... MOVEMENT WAS TO THE EAST AT 35 MPH. * WINDS TO 70 MPH WILL BE POSSIBLE WITH THIS LINE OF STORMS. * SEVERE THUNDERSTORMS WILL BE NEAR... FILLMORE AT 105 AM CDT... KNOX AT 110 AM CDT... ESMOND AT 115 AM CDT... MADDOCK AT 120 AM CDT. LEEDS AT 120 AM CDT. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 AM CDT SATURDAY MORNING FOR NORTHWEST MINNESOTA AND EASTERN NORTH DAKOTA. LAT...LON 4847 10011 4766 10030 4790 9912 4835 9923 $$ RIDDLE 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 Jul 20, 8:18 PM CDT, 4 hours 25 minutes earlier.
Area forecast discussion, Jul 20, 8:18 PM CDT, 4 hours 25 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 815 PM FRI JUL 20 2001 EVOLUTION AND TRACK OF NE MT MCS IS THE FCST PROBLEM TONIGHT. RUC ANALYSIS SHOWS MCS IN NE MT ASSOC WITH AREA OF 70H WARM ADVECTION WITH 30KT 85H MOIST FLOW FEEDING INTO INTO IT. ALSO THIS IS AIDED BY VORT MAX MOVING THRU CNTRL MT INTO SASK. MCS IS TRACKING ALONG THICKNESS FIELDS...WHICH EVENTUALLY TURN MORE SOUTHEAST WITH TIME OVER CWFA. QUESTION IS CAN MCS SUSTAIN ITSELF SEVERE-WISE AS IT MOVES TOWARD CWFA AFTER 06Z. ATMOSPHERE OVER CWFA...WHILE MOIST...IS NOT THAT UNSTABLE COMPARED TO PAST NIGHTS. 85H MOIST CONVERGENCE IS VERY WEAK WITH NRN PARTS OF THE CWFA IN A 85H COL. K INDICES PROG TO ACTUALLY DROP TO NR 20 IN NRN CWFA OVERNIGHT. SEVERAL POSSIBILITIES OVERNIGHT...THETA-E SHOWS BEST JUICE OVR FAR SW ND AND NRN SD AND THIS MCS MAY TRY TO DROP SOUTHEAST AND FEED ON THIS AIR OVERNIGHT. THUS WOULD BRING BEST SVR BET SW CWFA AND POINTS SOUTH OF THERE. OR MCS WILL TRACK EAST AND EVENTUALLY WEAKEN AS IT ENCOUNTERS LESS FAVORABLE ENVIRONMENT OVER ERN ND AFTER 06Z. BUT WITH HEAVY RAIN BEING A THREAT. ATTM...WE ARE LEADING TOWARD THIS SOLN. ONLY TIME WILL TELL. WITH UNCERTAINITIES AND ALL...WILL JUST LEAVE FFA ALONE. WILL TWEEK SOME TIME WORDING OF TSRA IN THE ZONES TO AFTER MIDNIGHT OR LATE. .FGF...FLASH FLOOD WATCH TONIGH/T ALONG AND NORTH OF A VALLEY CITY TO HILLSBORO TO BEMIDJI LINE. RIDDLE
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 1:30 AM CDT | Severe Thunderstorm Warning | FGF | Benson | 30 min |
| Jul 21, 1:57 AM CDT | Severe Thunderstorm Warning | FGF | Benson, Eddy | 63 min |
| Jul 21, 2:37 AM CDT | Severe Thunderstorm Warning | FGF | Barnes, Griggs, Nelson | 63 min |
| Jul 21, 2:52 AM CDT | Flash Flood Warning | FGF | Benson, Eddy, Ramsey | 4 hr |
| Jul 21, 2:56 AM CDT | Severe Thunderstorm Warning | FGF | Benson, Eddy | 49 min |
| Jul 21, 2:59 AM CDT | Severe Thunderstorm Warning | FGF | Ramsey | 61 min |
| Jul 21, 3:04 AM CDT | Severe Thunderstorm Warning | FGF | Steele | 56 min |
| Jul 21, 3:14 AM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 61 min |
| Jul 21, 3:41 AM CDT | Severe Thunderstorm Warning | FGF | Barnes, Cass, Griggs, Ransom, Steele | 64 min |
| Jul 21, 3:41 AM CDT | Severe Thunderstorm Warning | FGF | Traill | 64 min |
| Jul 21, 3:41 AM CDT | Severe Thunderstorm Warning | FGF | Nelson | 64 min |
| Jul 21, 4:17 AM CDT | Severe Thunderstorm Warning | FGF | Richland | 58 min |
| Jul 21, 4:44 AM CDT | Severe Thunderstorm Warning | FGF | Cass, Ransom | 46 min |
| Jul 21, 5:16 AM CDT | Severe Thunderstorm Warning | FGF | Richland | 44 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.