Alert archive / Michigan / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 9, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at Apr 16, 1998, 3:21 PM EDT for Shiawassee County, Michigan. It was in force for 59 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
- Apr 16, 1998, 3:21 PM EDT (19:21 UTC)
- Expired
- Apr 16, 1998, 4:20 PM EDT
- In force
- 59 min
- Issued by
- NWS Detroit, MI
- Area
- Whole counties
County Shiawassee County, MI
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 16, 3:45 PM EDT | Thunderstorm Wind 52 | Owosso, MI |
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 nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 7.4 hours before the alert went out and 64 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
- 494 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 213 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 KDTX 161921 RRA SVRDTX MIC155-162020- BULLETIN - EAS ACTIVATION/IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 321 PM EDT THU APR 16 1998 THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SHIAWASSEE COUNTY IN SOUTHEASTERN LOWER MICHIGAN * UNTIL 420 PM EDT * AT 320 PM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 15 MILES SOUTHWEST OF OWOSSO OR 5 MILES WEST OF LAINGSBURG MOVING NORTHEAST AT 35 MPH. * SOME AREAS AFFECTED OWOSSO BY 345 PM EDT CORUNNA BY 345 PM EDT HENDERSON BY 350 PM EDT THIS STORM HAS THE POTENTIAL OF PRODUCING HAIL UP TO GOLF BALL SIZE... OR 1 3/4 INCHES IN DIAMETER. HAIL OF THIS SIZE IS CAPABLE OF BREAKING WINDOWS... AND DAMAGING ALUMINUM SIDING AND VEHICLES. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. REILLY
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.
In the hours before
Special weather statement, Apr 16, 11:45 AM EDT, 3 hours 36 minutes before
MIZ047>049-053>055-060>063-068>070-075-076-082-083-170300- SEVERE WEATHER OUTLOOK FOR SOUTHEAST LOWER MICHIGAN NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 1145 AM EDT THU APR 16 1998 ...SEVERE WEATHER POTENTIAL STATEMENT FOR SOUTHEAST MICHIGAN... DISPATCHERS...PLEASE NOTIFY YOUR EMERGENCY MANAGERS IMMEDIATELY. SCATTERED THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND THIS EVENING. SOME OF THESE STORMS MAY APPROACH SEVERE LIMITS LATE THIS AFTERNOON REQUIRING SPOTTER ACTIVATION. AS A LOW PRESSURE SYSTEM TRACKS NORTHEAST THROUGH CENTRAL LOWER MICHIGAN TODAY...THUNDERSTORMS MAY DEVELOP OVER SOUTHEAST MICHIGAN AFTER 200 PM. THE BEST CHANCE OF THUNDERSTORMS WILL BE SOUTH OF I-69 WITH MOVEMENT TO THE NORTHEAST AT 40 MPH. THE STRONGER STORMS WILL HAVE THE POTENTIAL FOR 3/4 INCH HAIL AND WIND GUSTS NEAR 50 MPH. THE CHANCE OF THUNDERSTORMS WILL LINGER INTO THIS EVENING BUT WILL END BY 1000 PM. STAY TUNED TO NOAA WEATHER RADIO...OR YOUR FAVORITE MEDIA OUTLET...FOR THE LATEST INFORMATION. BT
Special weather statement, Apr 16, 11:45 AM EDT, 3 hours 36 minutes before
MIZ047>049-053>055-060>063-068>070-075-076-082-083-170300- SEVERE WEATHER OUTLOOK FOR SOUTHEAST LOWER MICHIGAN NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 1145 AM EDT THU APR 16 1998 ...SEVERE WEATHER POTENTIAL STATEMENT FOR SOUTHEAST MICHIGAN... DISPATCHERS...PLEASE NOTIFY YOUR EMERGENCY MANAGERS IMMEDIATELY. SCATTERED THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND THIS EVENING. SOME OF THESE STORMS MAY APPROACH SEVERE LIMITS LATE THIS AFTERNOON REQUIRING SPOTTER ACTIVATION. AS A LOW PRESSURE SYSTEM TRACKS NORTHEAST THROUGH CENTRAL LOWER MICHIGAN TODAY...THUNDERSTORMS MAY DEVELOP OVER SOUTHEAST MICHIGAN AFTER 200 PM. THE BEST CHANCE OF THUNDERSTORMS WILL BE SOUTH OF I-69 WITH MOVEMENT TO THE NORTHEAST AT 40 MPH. THE STRONGER STORMS WILL HAVE THE POTENTIAL FOR 3/4 INCH HAIL AND WIND GUSTS NEAR 50 MPH. THE CHANCE OF THUNDERSTORMS WILL LINGER INTO THIS EVENING BUT WILL END BY 1000 PM. STAY TUNED TO NOAA WEATHER RADIO...OR YOUR FAVORITE MEDIA OUTLET...FOR THE LATEST INFORMATION. BT
Special weather statement, Apr 16, 1:28 PM EDT, 1 hour 53 minutes before
MIZ047>049-053>055-060>063-068>070-075-076-082-083-170300- SEVERE WEATHER OUTLOOK FOR SOUTHEAST LOWER MICHIGAN NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 128 PM EDT THU APR 16 1998 ...SEVERE WEATHER POTENTIAL STATEMENT FOR SOUTHEAST MICHIGAN... DISPATCHERS...PLEASE NOTIFY YOUR EMERGENCY MANAGERS IMMEDIATELY. NUMEROUS SHOWERS AND THUNDERSTORMS WILL MOVE ACROSS SOUTHEAST MICHIGAN THIS AFTERNOON AND THIS EVENING. SOME OF THESE STORMS MAY EXCEED SEVERE LIMITS. SPOTTER ACTIVATION WILL BE REQUIRED. AS A LOW PRESSURE SYSTEM TRACKS NORTHEAST THROUGH CENTRAL LOWER MICHIGAN THIS AFTERNOON...THUNDERSTORMS WILL MOVE ACROSS SOUTHEAST MICHIGAN. SOME THUNDERSTORMS MAY BE SEVERE...WITH HAIL POSSIBLY AS LARGE IN DIAMETER AS A GOLFBALL. WIND GUSTS NEAR 50 MPH WILL ALSO BE POSSIBLE AS THE STORMS MOVE TO THE NORTHEAST AT 45 MPH. THUNDERSTORMS WILL LINGER INTO THIS EVENING...THOUGH THE THREAT OF SEVERE WEATHER IS EXPECTED TO END BY 8 PM. ALL THUNDERSTORMS SHOULD END BY 1000 PM. STAY TUNED TO NOAA WEATHER RADIO...OR YOUR FAVORITE MEDIA OUTLET...FOR THE LATEST INFORMATION. DJF
Special weather statement, Apr 16, 1:40 PM EDT, 1 hour 41 minutes before
MIZ047>049-053>055-060>063-068>070-075-076-082-083-170200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 140 PM EDT THU APR 16 1998 ...SEVERE THUNDERSTORM WATCH 229 IS IN EFFECT FOR ALL OF SOUTHEAST MICHIGAN THROUGH 8 PM... THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR ALL OF SOUTHEAST MICHIGAN EFFECTIVE UNTIL 8 PM. A SEVERE THUNDERSTORM WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR SEVERE STORMS IN AND CLOSE TO THE WATCH AREA...WITH HAIL 3/4-INCH IN DIAMETER OR LARGER AND WINDS OF 58 MPH OR GREATER. THE WATCH COVERS THE FOLLOWING COUNTIES IN SOUTHEAST MICHIGAN... MIDLAND BAY HURON SAGINAW TUSCOLA SANILAC LAPEER ST. CLAIR SHIAWASSEE GENESEE LIVINGSTON OAKLAND MACOMB WASHTENAW WAYNE LENAWEE MONROE THIS INCLUDES THE COMMUNITIES AND SURROUNDING AREAS OF MIDLAND...BAY CITY...SAGINAW...BAD AXE...FLINT...PORT HURON...DETROIT...ANN ARBOR... AND MONROE. ONCE AGAIN...A SEVERE THUNDERSTORM WATCH MEANS THAT SEVERE WEATHER MAY OCCUR. PERSONS ACROSS SOUTHEAST MICHIGAN SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS. IF THUNDERSTORMS MOVE NEARBY OR OVERHEAD...BE SURE TO MOVE INSIDE IF YOU ARE OUTSIDE. WHILE INDOORS... STAY AWAY FROM WINDOWS. STAY TUNED TO THIS STATION FOR LATER INFORMATION ON THE POSSIBILITY OF SEVERE WEATHER IN SOUTHEAST MICHIGAN. DJF
Special weather statement, Apr 16, 1:40 PM EDT, 1 hour 41 minutes before
MIZ047>049-053>055-060>063-068>070-075-076-082-083-170200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 140 PM EDT THU APR 16 1998 ...SEVERE THUNDERSTORM WATCH 229 IS IN EFFECT FOR ALL OF SOUTHEAST MICHIGAN THROUGH 8 PM... THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR ALL OF SOUTHEAST MICHIGAN EFFECTIVE UNTIL 8 PM. A SEVERE THUNDERSTORM WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR SEVERE STORMS IN AND CLOSE TO THE WATCH AREA...WITH HAIL 3/4-INCH IN DIAMETER OR LARGER AND WINDS OF 58 MPH OR GREATER. THE WATCH COVERS THE FOLLOWING COUNTIES IN SOUTHEAST MICHIGAN... MIDLAND BAY HURON SAGINAW TUSCOLA SANILAC LAPEER ST. CLAIR SHIAWASSEE GENESEE LIVINGSTON OAKLAND MACOMB WASHTENAW WAYNE LENAWEE MONROE THIS INCLUDES THE COMMUNITIES AND SURROUNDING AREAS OF MIDLAND...BAY CITY...SAGINAW...BAD AXE...FLINT...PORT HURON...DETROIT...ANN ARBOR... AND MONROE. ONCE AGAIN...A SEVERE THUNDERSTORM WATCH MEANS THAT SEVERE WEATHER MAY OCCUR. PERSONS ACROSS SOUTHEAST MICHIGAN SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS. IF THUNDERSTORMS MOVE NEARBY OR OVERHEAD...BE SURE TO MOVE INSIDE IF YOU ARE OUTSIDE. WHILE INDOORS... STAY AWAY FROM WINDOWS. STAY TUNED TO THIS STATION FOR LATER INFORMATION ON THE POSSIBILITY OF SEVERE WEATHER IN SOUTHEAST MICHIGAN. DJF
The office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 16, 2:43 PM EDT | Severe Thunderstorm Warning | DTX | Midland, Saginaw | 62 min |
| Apr 16, 3:45 PM EDT | Severe Thunderstorm Warning | DTX | Livingston | 60 min |
| Apr 16, 3:56 PM EDT | Severe Thunderstorm Warning | DTX | Genesee | 59 min |
| Apr 16, 4:23 PM EDT | Severe Thunderstorm Warning | DTX | Oakland | 27 min |
| Apr 16, 4:32 PM EDT | Tornado Warning | DTX | Sanilac | 43 min |
| Apr 16, 4:48 PM EDT | Severe Thunderstorm Warning | DTX | Lapeer | 32 min |
| Apr 16, 5:23 PM EDT | Severe Thunderstorm Warning | DTX | Saint Clair, Sanilac | 37 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 1998Every severe thunderstorm warning in 1998
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.