Alert archive / North Dakota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 135, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 25, 2002, 1:03 AM CDT for Cass County, North Dakota. It was in force for 42 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 25, 2002, 1:03 AM CDT (06:03 UTC)
- Expired
- Jul 25, 2002, 1:45 AM CDT
- In force
- 42 min
- Issued by
- NWS Grand Forks, ND
- Area
- Counties, with a storm outline in the text
County Cass County, ND
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
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 24, 10:05 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 6.1 hours before the alert went out and 255 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
- 2473 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 1734 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 140 m²/s²
- 0-3 km storm-relative helicity
- 191 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 14.5
The text
As transmitted, in the capitals the NWS used until 2016.
124 WUUS53 KFGF 250603 SVRFAR NDC017-250645- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 103 AM CDT THU JUL 25 2002 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL CASS COUNTY IN SOUTHEAST NORTH DAKOTA. * UNTIL 145 AM CDT. * AT 1256 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 3 MILES SOUTHEAST OF AMENIA...OR ABOUT 18 MILES NORTHWEST OF FARGO...MOVEMENT WAS TO THE EAST AT 25 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... PROSPER AT 110 AM... ARGUSVILLE AT 120 AM AND HARWOOD AT 125 AM. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM THURSDAY MORNING FOR NORTHWESTERN MINNESOTA AND SOUTHEAST NORTH DAKOTA. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 200 AM THURSDAY MORNING FOR SOUTHEAST NORTH DAKOTA. LAT...LON 4706 9729 4689 9720 4692 9685 4714 9692 DONAVON 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 24, 8:45 PM CDT, 4 hours 18 minutes earlier.
Area forecast discussion, Jul 24, 8:45 PM CDT, 4 hours 18 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 845 PM CDT WED JUL 24 2002 FORECAST CHALLENGE FOR UPDATE CONCERNS MAINLY TSRA THREAT. AREAS OF SHRA/TSRA ASSOCIATED WITH MID LEVEL CIRCULATION FROM KMVX-88D AND WATER VAPOR LOOP SHIFTING EAST OUT OF FA. WDLY SCT TSRA CONTINUES TO DEVELOP ALONG WEAK CONVERGENCE ZONE FROM KMVX-88D RDA SE TO NEAR PKD. FARTHER UPSTREAM CONVECTIVE COMPLEX OVER WESTERN ND PROPAGATING SE ALONG AND NORTH OF SFC BOUNDARY FROM S CENTRAL SD TO NE MT IN INSTABILITY AXIS. TIMING WOULD HAVE TSRA INTO SW FA AROUND 05Z. LOW LEVEL JET ORIENTED FROM E NEBRASKA NORTHEAST THROUGH MN. WITH STRONG CONVECTION OVER SD/NE TO INTERCEPT MOIST FEED...ORIENTATION OF LOW LEVEL JET AND BOUNDARIES DO NOT EXPECT SEVERE STORMS OVER FORECAST AREA. WILL HOWEVER MAINTAIN CHANCES OF TSRA...MAINLY AFT MIDNIGHT OVER SOUTHERN FA. FARTHER NORTH WITH LACK OF LOW LEVEL FORCING AND WILL LOWER CHANCES TO ISOLD. WILL TAKE A LAST LOOK AT TEMPERATURES HOWEVER WITH SFC DEWPOINTS TO REMAIN IN THE 60S OVERNIGHT GENERAL FCST LOOKS GOOD. .FGF...NONE VOELKER
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 12:45 AM CDT | Severe Thunderstorm Warning | FGF | Richland | 45 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 2002Every severe thunderstorm warning in 2002
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.