Alert archive / North Dakota / Tornado Warnings in 1993
Tornado Warning 9, NWS Bismarck, ND
NWS Bismarck, ND issued this tornado warning at Jul 18, 1993, 1:22 PM CDT for Williams County, North Dakota. It was in force for 38 min.
The area
The counties it named.
The facts
- Issued
- Jul 18, 1993, 1:22 PM CDT (18:22 UTC)
- Expired
- Jul 18, 1993, 2:00 PM CDT
- In force
- 38 min
- Issued by
- NWS Bismarck, ND
- Area
- Whole counties
County Williams County, ND
The nearest sounding before it
Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 6.4 hours before the alert went out and 231 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1046 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- -18 m²/s²
- 0-3 km storm-relative helicity
- 133 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KISN 181822 RRA
TORISN
NDC105-181900-
BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE WILLISTON ND
122 PM CDT SUN JUL 18 1993
THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL 200 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY
IN THE NORTHWEST PART OF NORTH DAKOTA
WILLIAMS
AT 1215 PM CDT THE PUBLIC REPORTED A FUNNEL CLOUD 1 MILE NORTHEAST
OF WILLISTON. THE FUNNEL CLOUD WAS MOVING NORTHEAST AT 30 MPH.
IF YOU ARE IN THE PATH OF THIS TORNADO...GO TO A BASEMENT SHELTER
IF AVAILABLE...OTHERWISE TO A CENTRAL INTERIOR ROOM ON THE LOWEST
FLOOR. ABANDON CARS AND MOBILE HOMES FOR A REINFORCED BUILDING.What forecasters said that day
The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jul 18, 11:44 AM CDT, 1 hour 38 minutes before
NDZ001-002-003-005-181740- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILLISTON ND 1140 AM CDT SUN JUL 18 1993 ...INTENSE THUNDERSTORM OVER NORTHWEST NORTH DAKOTA... AT 1135AM CDT AN INTENSE THUNDERSTORM WAS INDICATED BY RADAR OVER EXTREME NORTHWEST NORTH DAKOTA. THE STORM WAS 5 MILES NORTHWEST OF FORTUNA OVER EXTREME NORTHEST DIVIDE COUNTY OR 50 MILES NORTH NORTHWEST OF WILLISTON. THE STORM WAS MOVING NORTHEAST AT 15 MPH. THIS STORM WILL PRODUCE VERY HEAVY RAIN AND POSSIBLE HAIL ALONG WITH DANGEROUS LIGHTNING. IF THIS STORM MOVES INTO YOUR AREA GO TO A SAFE SHELTER INDOORS. OTHER RAINSHOWERS AND THUNDERSTORMS WERE LOCATED OVER AN AREA FROM 10 MILES SOUTH OF TIOGA SOUTH SOUTHWEST TO 25 MILES WEST OF DICKINSON. THE STRONGEST STORMS IN THIS AREA WERE OVER WESTERN DUNN COUNTY ABOUT 10 MILES NORTHWEST OF MANNING OR ABOUT 40 MILES NORTHWEST OF DICKINSON. THESE SHOWERS AND THUNDERSTORMS WERE MOVING NORTHEAST AT 15 MPH. REMEMBER ALL THUNDERSTORMS PRODUCE DEADLY LIGHTNING. RAINFALL AMOUNTS MAY BE HEAVY WITH THESE STORMS AND ROADWAYS MAY BECOME FLOODED. DO NOT ATTEMPT TO CROSS FLOODED ROADWAYS. KENNEDY
Special weather statement, Jul 18, 12:40 PM CDT, 42 minutes before
NDZ001-014-181930- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 1235 PM CDT SUN JUL 18 1993 ...SHOWERS AND THUNDERSTORMS IN WESTERN AND CENTRAL NORTH DAKOTA... AT 1235 PM CDT WEATHER RADARS INDICATED A LINE OF SHOWERS AND THUNDERSTORMS OVER WESTERN AND CENTRAL NORTH DAKOTA. THE LINE EXTENDED FROM NORTH OF MINOT NEAR THE CANADIAN BORDER...SOUTH-SOUTHWESTWARD TO THE DICKINSON AREA. THE LINE WAS MOVING TO THE NORTHEAST AT 35 MPH. A FEW OF THE THUNDERSTORMS IN THIS LINE CONTAINED MODERATE TO HEAVY RAIN. RAIN WILL BE IN MINOT BEFORE 1 PM. SOUTH OF THE DICKINSON AREA RADAR INDICTED DEVELOPING SHOWERS. THESE SHOWERS WILL CONTINUE TO INTENSIFY. SOME WILL BECOME THUNDERSTORMS. AT THERE CURRENT SPEED AND DEVELOPMENT...THE BISMARCK/MANDAN AREA SHOULD HAVE RAIN BY MID AFTERNOON. KAS
Special weather statement, Jul 18, 1:10 PM CDT, 12 minutes before
NDZ001-002-003-005-181910- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILLISTON ND 1210 AM CDT SUN JUL 18 1993 ...THUNDERSTORMS ARE MOVING INTO THE WILLISTON AREA... AT 1200 PM CDT RADAR INDICATED A LINE OF RAPIDLY DEVELOPING THUNDERSTORMS MOVING INTO THE WILLISTON AREA. THE STORMS WERE FROM SIDNEY MONTANA NORTHEAST THROUGH WILLISTON AND CONTINUED NORTHEAST INTO SOUTHERN SASKATCHEWAN. THESE STORMS WILL PRODUCE BRIEF HEAVY RAIN POSSIBLE HAIL AND DANGEROUS LIGHTNING. THE STORMS WERE MOVING NORTHEAST AT 30 MPH. HEAVY RAINFALL FROM THESE THUNDERSTORMS MAY CAUSE ROADWAYS AND SMALL STREAMS TO BECOME FLOODED. DO NOT ATTEMPT TO CROSS WATER COVERED ROADS. KENNEDY
The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 1:34 PM CDT | Severe Thunderstorm Warning | BIS | Ward | 26 min |
| Jul 18, 1:53 PM CDT | Severe Thunderstorm Warning | BIS | Williams | 37 min |
| Jul 18, 3:24 PM CDT | Severe Thunderstorm Warning | BIS | Mountrail | 66 min |
| Jul 18, 3:42 PM CDT | Severe Thunderstorm Warning | BIS | McLean | 48 min |
| Jul 18, 4:28 PM CDT | Severe Thunderstorm Warning | BIS | McLean | 62 min |
| Jul 18, 6:56 PM CDT | Severe Thunderstorm Warning | BIS | Wells | 54 min |
| Jul 18, 6:56 PM CDT | Severe Thunderstorm Warning | BIS | Sheridan | 24 min |
Nearby
Tornado Warnings in North Dakota, 1993Every tornado warning in 1993Tornadoes in 1993
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.