Alert archive / Michigan / Tornado Warnings in 1987
Tornado Warning 2, NWS Marquette, MI
NWS Marquette, MI issued this tornado warning at Jul 11, 1987, 2:46 PM EDT for Houghton County, Keweenaw County, Michigan. It was in force for 59 min.
The area
The counties it named.
The facts
- Issued
- Jul 11, 1987, 2:46 PM EDT (18:46 UTC)
- Expired
- Jul 11, 1987, 3:45 PM EDT
- In force
- 59 min
- Issued by
- NWS Marquette, MI
- Area
- Whole counties
Counties Houghton County, MI, Keweenaw County, MI
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 12:00Z, 6.8 hours before the alert went out and 297 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
- 2044 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 563 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 50 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 KMQT 111846 TORMQT MIC083-061-111945- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED TORNADO AND SPECIAL MARINE WARNING NATIONAL WEATHER SERVICE MARQUETTE MI 246 PM EDT SAT JUL 11 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO AND SPECIAL MARINE WARNING EFFECTIVE UNTIL 345 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF NORTHWEST UPPER MICHIGAN...KEWEENAW AND HOUGHTON ...THIS WARNING ALSO INCLUDES THE ADJACENT COASTAL WATERS FOR THE COUNTIES JUST MENTIONED AT 245 PM EDT STATE POLICE REPORT A TORNADO ON THE GROUND 10 MILES NORTHEAST OF HOUGHTON MOVING TO THE SOUTHEAST AT 40 MILES AN HOUR. 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. IF YOU ARE IN AN AREA THREATENED BY THE STORM..GO TO A REINFORCED SHELTER AND PREPARE FOR DAMAGING WIND...LARGE HAIL...VERY HEAVY, RAIN AND LIGHTNING. TE
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 11, 10:24 AM EDT, 4 hours 22 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MARQUETTE MI 1020 AM EDT SAT JUL 11 1987 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 4 PM EDT FOR WEST UPPER MICHIGAN... AT 1020 AM EDT...NO THUNDERSTORMS OR RAINSHOWERS WERE OVER UPPER MICHIGAN. HOWEVER...STRONG THUNDERSTORMS...SOME POSSIBLY SEVERE WERE IN MINNESOTA AND NORTHWEST WISCONSIN AND WERE HEADED EAST FOR UPPER MICHIGAN. REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE DAMAGING WINDS...LARGE HAIL...FREQUENT LIGHTNING...AND OCCASIONALLY DO SPAWN A TORNADO. TE
Special weather statement, Jul 11, 11:13 AM EDT, 3 hours 33 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MARQUETTE MI 1110 AM EDT SAT JUL 11 1987 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 4 PM EDT FOR WEST UPPER MICHIGAN... AT 1110 AM EDT...NO THUNDERSTORMS OR RAINSHOWERS WERE OVER UPPER MICHIGAN. HOWEVER...STRONG THUNDERSTORMS...SOME POSSIBLY SEVERE WERE LOCATED 10 MILES WEST OF IRONWOOD MICHIGAN...IN NORTHWEST WISCONSIN AND MINNESOTA. THESE THUNDERSTORMS ARE MOVING TO THE EAST AND WILL BE IN WESTERN UPPER MICHIGAN BY 12NOON EDT. REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE DAMAGING WINDS...LARGE HAIL...FREQUENT LIGHTNING...AND OCCASIONALLY DO SPAWN A TORNADO. BE PREPARED TO SEEK SAFE SHELTER IF THREATENING WEATHER DOES OCCUR. DL0
Special weather statement, Jul 11, 1:54 PM EDT, 52 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MARQUETTE MI 150 PM EDT SAT JUL 11 1987 ...A SEVERE THUNDERSTORM WATCH IN EFFECT FOR WEST AND CENTRAL UPPER MICHIGAN UNTIL 8 PM EDT... ...SEVERE THUNDERSTORM WARNINGS FOR WEST UPPER MICHIGAN COUNTIES HAVE EXPIRED... AT 145 PM EDT...STRONG THUNDERSTORMS WERE STILL OVER WEST UPPER MICHIGAN ...LOCATED ALONG A LINE FROM HOUGHTON TO IRON MOUNTAIN AND MOVING TO THE EAST AT 40 MILES AN HOUR. NO SEVERE WEATHER HAS BEEN REPORTED YET. HOWEVER...MOST OF THE STORMS WERE MOVING OVER SPARCELY POPULATED AREAS. THESE STORMS ARE CAPABLE OF PRODUCING VERY HEAVY RAIN...DAMAGING WINDS ...DANGEROUS LIGHTNING AND POSSIBLE HAIL. BE PREPARED TO SEEK SAFE SHELTER IF THREATENING WEATHER OCCUR. TE
The office that day
Everything else NWS Marquette, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 11:42 AM EDT | Severe Thunderstorm Warning | MQT | Gogebic, Ontonagon | 63 min |
| Jul 11, 12:51 PM EDT | Severe Thunderstorm Warning | MQT | Baraga, Gogebic, Houghton, Iron, Ontonagon | 69 min |
| Jul 11, 2:33 PM EDT | Tornado Warning | MQT | Marquette | 57 min |
| Jul 11, 3:32 PM EDT | Tornado Warning | MQT | Marquette | 28 min |
| Jul 11, 3:38 PM EDT | Severe Thunderstorm Warning | MQT | Dickinson, Menominee | 67 min |
| Jul 11, 4:06 PM EDT | Severe Thunderstorm Warning | MQT | Alger, Delta, Marquette | 69 min |
| Jul 11, 4:36 PM EDT | Tornado Warning | MQT | Delta, Menominee | 54 min |
| Jul 11, 5:15 PM EDT | Severe Thunderstorm Warning | MQT | Schoolcraft | 60 min |
Nearby
Tornado Warnings in Michigan, 1987Every tornado warning in 1987Tornadoes in 1987
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.