Alert archive / Michigan / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 13, NWS Marquette, MI
NWS Marquette, MI issued this severe thunderstorm warning at Jul 11, 1987, 4:06 PM EDT for Alger County, Delta County, Marquette County, Michigan. It was in force for 69 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
- Jul 11, 1987, 4:06 PM EDT (20:06 UTC)
- Expired
- Jul 11, 1987, 5:15 PM EDT
- In force
- 69 min
- Issued by
- NWS Marquette, MI
- Area
- Whole counties
Counties Alger County, MI, Delta County, MI, Marquette County, MI
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 11, 4:25 PM EDT | Thunderstorm Wind 0 | Delta, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Sault Ste Marie, MI (KSSM), launched 12:00Z, 8.1 hours before the alert went out and 208 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
- 271 J/kg
- Mixed-layer CIN
- -174 J/kg
- Mixed-layer LCL
- 698 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 108 m²/s²
- 0-3 km storm-relative helicity
- 188 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMQT 112006 SVRMQT MIC103-003-041-112115- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING NATIONAL WEATHER SERVICE MARQUETTE MI 406 PM EDT SAT JUL 11 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING EFFECTIVE UNTIL 515 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF NORTH CENTRAL UPPER MICHIGAN...MARQUETTE...ALGER AND DELTA ...THIS WARNING ALSO INCLUDES THE ADJACENT COASTAL WATERS FOR THE COUNTIES JUST MENTIONED AT 4 PM EDT RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM A POINT 10 MILES SOUTHEAST OF MARQUETTE TO IRON MOUNTAIN. THE STORMS IN THIS LINE WERE MOVING TO THE EAST AT 35 MILES AN HOUR . IF YOU ARE IN AN AREA THREATENED BY THE STORM..GO TO A REINFORECED SHELTER AND PREPARE FOR DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN AND LIGHTNING. REMEMBER...SEVERE THUNDERSTORMS CAN AND SOMETIMES DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING...SO BE ON THE LOOKOUT. TE
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, Jul 11, 10:24 AM EDT, 5 hours 42 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, 4 hours 53 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, 2 hours 12 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, 2:46 PM EDT | Tornado Warning | MQT | Houghton, Keweenaw | 59 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, 4:36 PM EDT | Tornado Warning | MQT | Delta, Menominee | 54 min |
| Jul 11, 5:15 PM EDT | Severe Thunderstorm Warning | MQT | Schoolcraft | 60 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 1987Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.