Alert archive / North Dakota / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 166, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 22, 1999, 6:24 PM CDT for Barnes County, Cass County, North Dakota. It was in force for 31 min. 3 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
- Jul 22, 1999, 6:24 PM CDT (23:24 UTC)
- Expired
- Jul 22, 1999, 6:55 PM CDT
- In force
- 31 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
Counties Barnes County, ND, Cass County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 71 km from the middle of the area, began a volume at 23:24 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 |
|---|---|---|---|
| Jul 22, 6:30 PM CDT | Hail 0.75 | Fingal, ND | |
| Jul 22, 6:40 PM CDT | Hail 0.88 | Valley City, ND | |
| Jul 22, 6:52 PM CDT | Hail 1 | Alice, 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 |
|---|---|---|---|
| Jul 22, 5:15 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 11.4 hours before the alert went out and 232 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
- 2531 J/kg
- Mixed-layer CIN
- -64 J/kg
- Mixed-layer LCL
- 569 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- -21 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 2.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFAR 222325 RRA SVRFAR NDC003-017-222355- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 624 PM CDT THU JUL 22 1999 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN BARNES COUNTY IN SOUTHEASTERN NORTH DAKOTA SOUTHWESTERN CASS COUNTY IN SOUTHEASTERN NORTH DAKOTA * UNTIL 655 PM CDT * AT 623 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 17 MILES SOUTHEAST OF VALLEY CITY OR 2 MILES NORTHWEST OF LUCCA... MOVING NORTHEAST AT 10 MPH. * ALICE NORTH DAKOTA IS IN THE PATH OF THE STORM. DURING THUNDERSTORMS YOU SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DO NOT USE TELEPHONES OR ELECTRICAL APPLIANCES. HOPPES
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 22, 3:10 PM CDT, 3 hours 14 minutes earlier.
Area forecast discussion, Jul 22, 3:10 PM CDT, 3 hours 14 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 310 PM CDT WED JUL 22 1999 FORECAST PROBLEM FOR TONIGHT IS PCPN. LATEST VIS SATELLITE IMAGERY HAS AC AND CI WITH EMBEDDED TSRA ALONG SPEED CONVERGENCE BOUNDARY THROUGH CENTER OF CWFA. LATEST ADAP HAS LIS OF AROUND -10 WITH A SFC MOISTURE CONVERENCE MAX NEAR DVL AND ABOUT A 2 DEGREE CAP. MODELS SIMILAR IN TREATMENT OF SHORTWAVE AS IT LIFTS N FROM SD THROUGH ND SIDE OF CWFA BY 06Z. STILL PREFER ETA SOLUTION OVER OTHER MODELS SINCE IT HAS HAD THE BEST ACCURACY AND CONSISTENCY OVER THE PAST FEW DAYS. POTENTIAL REMAINS FOR SVR OVER CWFA AS THE WAVE MOVES THROUGH. THEREFORE...WILL LEAVE EVENING TSRA WITH POSSIBLE SVR IN FORECAST FOR THIS EVENING. FORECAST PROBLEM FOR 2ND THROUGH 4TH PERIOD IS TEMPS. MODELS CONTINUE TO KEEP 500MB RIDGE OVER NORTHERN PLAINS WITH SHORTWAVES RIDING THROUGH. HOWEVER...BEST UVV REMAINS W OF CWFA AS A LOW PRESSURE SYSTEM DEVELOPS IN E MT BY SAT. GOOD WAA REMAINS AHEAD OF THIS NEXT LOW PRESSURE SYSTEM...KEEPING HOT AND HUMID CONDITIONS OVER THE CWFA INTO SAT. EXTENDED FORECAST...AFTER VERY WARM AND SULTRY SATURDAY...EXPECT SOUTHWARD EXPANDING WESTERLIES TO SWEEP FAIRLY SIGNIFICANT COLD FRONT ACROSS THE REGION SUNDAY ACCOMPANIED BY THE POTENTIAL FOR RATHER HEFTY THUNDERSTORMS. COOLER AND DRIER CONDITIONS SHOULD THEN FOLLOW IN ITS WAKE FOR MONDAY AND TUESDAY. .FGF...NONE NG/BERG
Hazardous weather outlook, Jul 22, 11:31 AM CDT, 6 hours 53 minutes before
MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052-053-221915- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 1131 AM CDT THU JUL 22 1999 ...SEVERE THUNDERSTORMS ARE EXPECTED ACROSS EASTERN NORTH DAKOTA AND NORTHWEST AND WEST CENTRAL MINNESOTA THIS AFTERNOON AND EVENING... SYNOPSIS...UNSTABLE AIR WILL REMAIN IN PLACE FOR THE REMAINDER OF THE AFTERNOON...WITH DEW POINTS IN THE LOWER 70S AND TEMPERATURES OF AROUND 90. AN UPPER LEVEL TROUGH AND WEAK SURFACE COLD FRONT WILL APPROACH THE REGION THIS AFTERNOON...AND PASS THROUGH THE AREA BY MIDNIGHT. AREA OF CONCERN...A MODERATE RISK OF SEVERE THUNDERSTORMS IS FORECAST FOR AREAS OF EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA FROM COOPERSTOWN TO MAYVILLE TO BEMIDJI AND POINTS NORTH. SOUTH OF THIS LINE A SLIGHT CHANCE OF SEVERE THUNDERSTORMS IS FORECAST. TIME...BETWEEN 4 PM AND MIDNIGHT. TYPE OF HAZARD...MAINLY STRAIGHT LINE WIND DAMAGE...LARGE HAIL AND ISOLATED TORNADOES. KELLENBENZ/BRAZZELL
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 3:49 AM CDT | Severe Thunderstorm Warning | FGF | Benson, Eddy | 46 min |
| Jul 22, 4:23 AM CDT | Severe Thunderstorm Warning | FGF | Ramsey, Towner | 47 min |
| Jul 22, 5:11 AM CDT | Severe Thunderstorm Warning | FGF | Ramsey | 34 min |
| Jul 22, 5:25 AM CDT | Tornado Warning | FGF | Ramsey | 35 min |
| Jul 22, 5:48 AM CDT | Tornado Warning | FGF | Nelson | 32 min |
| Jul 22, 5:56 AM CDT | Severe Thunderstorm Warning | FGF | Griggs | 34 min |
| Jul 22, 6:54 PM CDT | Severe Thunderstorm Warning | FGF | Barnes, Cass | 46 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 1999Every severe thunderstorm warning in 1999
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.