Alert archive / Iowa / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 13, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Jul 6, 1987, 4:35 PM CDT for Jones County, Iowa. It was in force for 55 min.
The area
The counties it named.
The facts
- Issued
- Jul 6, 1987, 4:35 PM CDT (21:35 UTC)
- Expired
- Jul 6, 1987, 5:30 PM CDT
- In force
- 55 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 12:00Z, 9.6 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- NaN m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 86 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 062136 SVRDBQ IAC105-062230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DUBUQUE IA 435 PM CDT MON JUL 6 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 530 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF NORTHEAST IOWA...SOUTHWEST ONE-HALF OF JONES WEATHER RADAR INDICATED A SEVERE THUNDERSTORM MOVING INTO THE WEST- CENTRAL PORTION OF JONES COUNTY NEAR ANAMOSA...40 MILES SOUTHWEST OF DUBUQUE. THE SEVERE THUNDERSTORMS WERE MOVING TO THE SOUTHEAST AT 20 MILES AN HOUR. IF YOU ARE IN THE PATH OF THIS STORM...OR SEE THREATENING WEATHER APPROACH...TAKE COVER IMMEDIATELY. REMEMBER, SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS. TO REPORT SEVERE WEATHER HAVE YOUR LOCAL LAW ENFORCEMENT AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE. ASMUS
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 6, 10:53 AM CDT, 5 hours 42 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DUBUQUE IA 1053 AM CDT MON JUL 6 1987 ...THUNDERSTORMS IN WESTERN PORTIONS OF THE TRI-STATE AREA... THUNDERSTORMS WERE IN THE WESTERN PORTION OF THE TRI-STATE AREA AT 1050 THIS MORNING. THE THUNDERSTORMS WERE MOVING TO THE NORTHEAST AT 20 TO 25 MILES AN HOUR. THE STRONGEST STORM WAS LOCATED NEAR MANCHESTER...40 MILES WEST OF DUBUQUE. THE LEADING EDGE OF THE RAIN WAS FROM NEAR ELKADER...40 MILES NORTH- WEST OF DUBUQUE...TO NEAR ANAMOSA...40 MILES SOUTHWEST OF DUBUQUE. THESE STORMS WILL PRODUCE HEAVY RAIN AND GUSTY WIND AS THEY MOVE ACROSS THE AREA LATE THIS MORNING. THESE THUNDERSTORMS COULD ALSO PRODUCE SMALL HAIL. ASMUS
Special weather statement, Jul 6, 12:34 PM CDT, 4 hours 1 minute before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DUBUQUE IA
1235 PM CDT MON JUL 6 1987
...THUNDERSTORMS CONTINUING IN THE TRI-STATE AREA...
AT 1230 PM CDT SCATTERED THUNDERSTORMS WERE PRODUCING HEAVY RAIN
...GUSTY WINDS...AND DANGEROUS LIGHTNING IN PORTIONS OF THE
DUBUQUE TRI-STATE AREA.
THE STRONGEST THUNDERSTORMS WERE LOCATED NEAR ANAMOSA...40 MILES
SOUTHWEST OF DUBUQUE...NEAR MAQUOKETA...30 MILES SOUTH OF DUBUQUE...
AND NEAR LANCASTER WISCONSIN...25 MILES NORTHEAST OF DUBUQUE.
THE THUNDERSTORMS WERE PART OF AN AREA OF PRECIPITATION THAT COVERED
MUCH OF THE TRI-STATE AREA IN A 30 MILES WIDE BAND EXTENDING FROM
SOUTHWEST WISCONSIN...ACROSS DYERSVILLE TO NEAR CEDAR RAPIDS.
ALL THE PRECIPITATON WAS MOVING TO THE NORTHEAST AT 20 TO 25 MILES
AN HOUR.
THE STRONG THUNDERSTORMS WILL CONTINUE PRODUCING HEAVY RAIN...GUSTY
WINDS...AND DANGEROUS LIGHTNING FOR THE NEXT 2 TO 3 HOURS. THESE
STORMS ARE ALSO 2CAPABLE OF PRODUCING SMALL HAIL.
IF THREATENING WEATHER SHOULD APPROACH...TAKE COVER UNTIL THE STORM
PASSES.
ASMUSLocal storm report, Jul 6, 1:31 PM CDT, 3 hours 4 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DUBUQUE IA
610 PM CDT THU JUN 18 1987
111 PM...MARBLE SIZE HAIL AND STRONG WIND AT CITY OF OLIN IN
SOUTHERN JONES COUNTY.
116 PM...3/4 tINCH AND LARGER REPORTED IN THE CITY OF WYOMING IN
SOUTHER JONES COUNTY.
REPORTS WERE FROM THE CIVIL DEFENSE DIRECTOR IN JONES COUNTY.
KOWALSKILocal storm report, Jul 6, 2:46 PM CDT, 1 hour 49 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DUBUQUE IA
245 PM CDT THU JUN 18 1987
111 PM...MARBLE SIZE HAIL AND STRONG WIND AT CITY OF OLIN IN
SOUTHERN JONES COUNTY...REPORTED BY CD...JONES COUNTY.
116 PM...3/4 INCH AND LARGER REPORTED IN THE CITY OF WYOMING IN
SOUTHERN JONES COUNTY...REPORTED BY CD...JONES COUNTY.
145 PM...MARBLE SIZE AND LARGER HAIL...VERY STRONG WIND AND HEAVY
RAIN IN CITY OF HANOVER...JO-DAVIES COUNTY NORTHWEST
ILLINOIS...REPORTED BY SHERIFFS OFFICE.
1-130 PM...SMALL HAIL...1.37 INCH OF RAIN IN ONE HOUR REPORTED BY
LOCK AND DAM 11...BELLEVUE IOWA...JACKSON COUNTY.
KOWALSKILocal storm report, Jul 6, 3:09 PM CDT, 1 hour 26 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DUBUQUE IA
245 PM CDT MON JUL 6 1987
...CORRECTION FOR DAY AND DATE...
111 PM...MARBLE SIZE HAIL AND STRONG WIND AT CITY OF OLIN IN
SOUTHERN JONES COUNTY...REPORTED BY CD...JONES COUNTY.
116 PM...3/4 INCH AND LARGER REPORTED IN THE CITY OF WYOMING IN
SOUTHERN JONES COUNTY...REPORTED BY CD...JONES COUNTY.
145 PM...MARBLE SIZE AND LARGER HAIL...VERY STRONG WIND AND HEAVY
RAIN IN CITY OF HANOVER...JO-DAVIES COUNTY NORTHWEST
ILLINOIS...REPORTED BY SHERIFFS OFFICE.
1-130 PM...SMALL HAIL...1.37 INCH OF RAIN IN ONE HOUR REPORTED BY
LOCK AND DAM 11...BELLEVUE IOWA...JACKSON COUNTY.
KOWALSKISpecial weather statement, Jul 6, 3:50 PM CDT, 45 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DUBUQUE IA
345 PM CDT MON JUL 6 1987
...THUNDERSTORM WATCH UNTIL 700 PM CDT...
AT 340 PM THUNDERSTORMS WERE MOVING THROUGH DELAWARE AND NORTHERN
JONES COUNTIES IN EAST CENTRAL IOWA.
THE STRONGEST STORMS WERE LOCATED NORTH OF MANCHESTER AND NEAR RYAN
IN DELAWARE COUNTY 35 MILES WEST OF DUBUQUE...MOVING SOUTHEAST AT
15 MILES AN HOUR.
REPORTS OF WIND 40 TO 50 MPH AND HEAVY RAIN OCCURRED AS THE STORMS
MOVED THROUGH THE WESTERN PART OF DELAWARE COUNTY.
IF THREATENING WEATHER APPROACHES...TAKE COVER IMMEDIATELY.
KOWALSKIThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 12:35 PM CDT | Severe Thunderstorm Warning | DVN | Dubuque, Jones | 55 min |
| Jul 6, 12:55 PM CDT | Severe Thunderstorm Warning | DVN | Jackson | 65 min |
| Jul 6, 6:06 PM CDT | Severe Thunderstorm Warning | DVN | Cedar | 39 min |
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.