Alert archive / Iowa / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 7, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at May 27, 1987, 9:48 PM CDT for Jones County, Iowa. It was in force for 57 min.
The area
The counties it named.
The facts
- Issued
- May 27, 1987, 9:48 PM CDT (02:48 UTC)
- Expired
- May 27, 1987, 10:45 PM CDT
- In force
- 57 min
- Issued by
- NWS Quad Cities, IA
- Area
- Whole counties
County Jones County, IA
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
Peoria Regional, IL (KPIA), launched 00:00Z, 2.8 hours before the alert went out and 206 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
- 1393 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 1673 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 60 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 KDBQ 280254 SVRDBQ IAC105-280345- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DUBUQUE IA 948 PM CDT WED MAY 27 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1045 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF NORTHEAST IOWA...JONES AT 945 PM CDT RADAR INDICATED SEVERE THUNDERSTORMS WERE MOVING INTO PORTIONS OF JONES COUNTY. THE STRONGEST THUNDERSTORM WAS NEAR CENTER JUNCTION...35 MILES SOUTHWEST OF DUBUQUE. THE SEVERE THUNDERSTORMS WERE MOVING TO THE NORTHEAST AT 45 MILES AN HOUR. IF YOU ARE CAUGHT OUTSIDE, SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING. DAMAGING WIND, LARGE HAIL, VERY HEAVY RAIN, AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE, AWAY FROM WINDOWS, UNTIL THE STORM HAS PASSED. TO REPORT SEVERE WEATHER...HAVE YOUR LOCAL LAW ENFORCEMENT AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE. ATSMUS
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, May 27, 5:31 PM CDT, 4 hours 17 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DUBUQUE IA 530 PM CDT WED MAY 27 1987 AT 525 PM CDT A STRONG THUNDERSTORM WAS LOCATED IN EXTREME NORTH- EAST JO-DAVIESS COUNTY ILLINIOS NEAR THE COMMUNITY OF WARREN... 35 MILES EAST OF DUBUQUE. THIS THUNDERSTORM WAS PART OF A LINE OF THUNDERSTORMS THAT EXTENDED FROM CENTRAL WISCONSIN INTO EASTERN IOWA. ALL THE THUNDERSTORM ACTIVITY WAS MOVING TO THE NORTHEAST AT 30 TO 40 MILES AN HOUR. THE STRONG THUNDERSTORM IN NORTHEAST JO-DAVIES COUNTY ILLINIOS WILL BE MOVING INTO EASTERN PORTIONS OF LAFAYETTE COUNTY WISCONSIN BEFORE 6 PM CDT...THEN MOVING OUT OF THE DUBUQUE TRI-STATE AREA BY 8 PM CDT. THIS STRONG THUNDERSTORM IS LIKELY TO CAUSE _HEAVY RAIN...DANGEROUS LIGHTNING...AND STRONG GUSTY WINDS AS IT MOVES ACROSS THE AREA. IF YOU SIGHT THREATENING WEATHER...IT IS BEST TO TAKE COVER IMMEDIATELY. SEVERE WEATHER CAN STRIKE WITH LITTLE OR NO ADVANCE WARNING. ASMUS
Local storm report, May 27, 6:23 PM CDT, 3 hours 25 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DUBUQUE IA
625 PM CDT WED MAY 27 1987
1750...ONE INCH HAIL REPORTED AT SOUTH WAYNE WISCONSIN IN EXTREME
SOUTHEAST CORNER OF LAFAYETTE COUNTY. HAIL FELL AT 1740 BUT
REPORT NOT RELAYED TO NWS DBQ UNTIL 1750. REPORT FROM
LAFAYETTE COUNTY SHERIFF.
NO OTHER REPORTS RECIEVED...ALL TIMES CDT.
ASMUSSpecial weather statement, May 27, 6:50 PM CDT, 2 hours 58 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOLINE IL 649 PM CDT WED MAY 27 1987 ...STRONG THUNDERSTORMS IN EASTERN IOWA AND NORTHWESTERN ILLINOIS... AT 645 PM CDT...A 30 TO 40 MILE WIDEBAND OF SHOWERS AND STRONG THUNDERSTORMS EXTENDED FROM WASHINGTON IOWA..60 MILES SOUTHWEST OF THE QUAD CITIES..TO JUST NORTH OF THE QUAD CITIES TO JUST SOUTH OF FREEPORT IN NORTHERN ILLINOIS. SOME OF THE STRONGER THUNDERSTORMS ARE LIKELY TO BE ACCOMAPNIED BY BRIEF HEAVY RAIN..SMALL HAIL..WIND GUST TO 40 MPH OR MORE AND FREQUENT DANGEROUS LIGHTNING. MOVEMENT WAS TO THE NORTHEAST ABOUT 25 TO 30 MPH. AT 643 PM WIND GUSTS TO 46 MPH WAS RECORDED AT QUAD CITY AIRPORT. WIGGINS
Special weather statement, May 27, 8:15 PM CDT, 1 hour 33 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOLINE IL 815 PM CDT WED MAY 27 1987 ...STRONG THUNDERSTORMS IN EAST CENTRAL IOWA... AT 812 PM CDT STRONG THUNDERSTORMS WERE CLUSTERED NEAR TIPTON IOWA IN CENTRAL CEDAR COUNTY..ABOUT 35 TO 40 MILES NORTHWEST OF THE QUAD CITIES. THIS STORM MAY BE ACCOMPANIED BY BRIEF HEAVY RAIN..HAIL..STRONG WIND GUSTS AND SHARP LIGHTNING AS IT MOVES NORTHNORTHEAST 30 MPH. THE STORM WAS PART OF A LARGER AREA OF SHOWERS AND THUNDERSTORMS THAT EXTENDED IN A 30 MILE WIDE BAND FROM CEDAR RAPIDS IOWA TO FREEPORT ILLINOIS. MOVMENT WAS NORTHEAST ABOUT 25 TO 30 MPH. WIGGINS
Nearby
Severe Thunderstorm Warnings in Iowa, 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; the sounding from the Mesonet's radiosonde archive.