Alert archive / Iowa / Tornado Warnings in 1991
Tornado Warning 13, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Sep 12, 1991, 5:18 PM CDT for Jones County, Iowa. It was in force for 27 min. 2 reports 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
- Sep 12, 1991, 5:18 PM CDT (22:18 UTC)
- Expired
- Sep 12, 1991, 5:45 PM CDT
- In force
- 27 min
- Issued by
- NWS Quad Cities, IA
- Area
- Whole counties
County Jones County, IA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 12, 5:20 PM CDT | Tornado F0 | Jones, IA | |
| Sep 12, 5:50 PM CDT | Thunderstorm Wind 50 | Jones, IA |
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
Green Bay/Straub, WI (KGRB), launched 12:00Z, 10.3 hours before the alert went out and 359 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
- 592 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 64 m²/s²
- 0-3 km storm-relative helicity
- 145 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 122222 COR TORDBQ IAC105-122245- BULLETIN - EBS ACTIVATION REQUESTED...CORRECTION FOR TIME... TORNADO WARNING NATIONAL WEATHER SERVICE DUBUQUE IA 518 PM CDT THU SEP 12 1991 THE NATIONAL WEATHER SERVICE IN DUBUQUE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 545 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEAST IOWA ...NORTHERN JONES COUNTY AT 515 PM CDT...A TORNADO WAS INDICATED BY RADAR NEAR CENTRAL CITY IN LINN COUNTY...50 MILES SOUTHWEST OF DUBUQUE AND MOVING EAST AT 50 MILES AN HOUR...AND WILL BE ENTERING NORTHERN JONES COUNTY FROM NOW UNTIL 545 PM. SOME CITIES AFFECTED...MONTICELLO AND LANGWORTHY. IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A BASEMENT. GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM SUCH AS A CLOSET ON THE LOWEST FLOOR. USE BLANKETS...PILLOWS... OR CUSHIONS TO COVER YOUR BODY. AVOID WINDOWS. KOWALSKI NNNN
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, Sep 12, 2:27 PM CDT, 2 hours 51 minutes before
IAZ008-ILZ001-WIZ018-122030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DUBUQUE IA 227 PM CDT THU SEP 12 1991 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR MOST OF TRI-STATE AREA UNTIL 900 PM CDT... AT 225 PM CDT...NO PRECIPITATION WAS IN THE TRI-STATE AREA. HOWEVER THUNDERSTORMS ARE EXPECTED TO DEVELOP RAPIDLY AND SOME MAY BECOME SEVERE. PERSONS IN THE TRI-STATE AREA SHOULD BE ON THE LOOKOUT FOR STORMS THIS AFTERNOON AND TONIGHT...LISTEN TO RADIO AND TV BROADCASTS OR NOAA WEATHER RADIO BROADCASTS FOR LATEST DEVELOPMENTS. THE ONLY COUNTIES IN THE TRI-STATE AREA NOT IN THIS SEVERE THUNDERSTORM WATCH ARE GRANT AND LAFAYETTE COUNTIES IN SOUTHWEST WISCONSIN...BUT KEEP IN MIND THAT SEVERE THUNDERSTORMS CAN OCCUR IN OR NEAR THE WATCH AREA. KOWALSKI NNNN
Special weather statement, Sep 12, 3:36 PM CDT, 1 hour 42 minutes before
IAZ008-ILZ001-WIZ018-122145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DUBUQUE IA 336 PM CDT THU SEP 12 1991 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 900 PM CDT FOR MOST OF THE TRI-STATE AREA... AT 330 PM CDT...NO STORMS WERE DETECTED IN THE TRI-STATE AREA. STORMS WERE REPORTED NORTHWEST OF WATERLOO AND NORTHEAST OF DES MOINES AND WERE MOVING EAST AT 35 MILES AN HOUR. THUNDERSTORMS DEVELOP RAPIDLY...AND PERSONS IN THE TRI-STATE SHOULD BE ON THE ALERT AND IF THREATENING WEATHER IS SIGHTED...TAKE COVER IMMEDIATELY. KOWALSKI NNNN
Special weather statement, Sep 12, 4:28 PM CDT, 50 minutes before
ILZ004-IAZ015-122220- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOLINE IL 4 20 PM CDT THU SEP 12 1991 ...SEVERE THUNDERSTORMS MOVE INTO EAST CENTRAL IOWA... AT 4 15 PM A LARGE AREA OF THUNDERSTORMS...SOME SEVERE...STRETCHED FROM WATERLOO IOWA ABOUT 40 MILES SOUTHWEST. THESE THUNDERSTORMS WERE MOVING RAPIDLY EASTWARD AT ABOUT 50 MPH. AT THE CURRENT RATE THESE STORMS WILL BE ENTERING THE WESTERN PARTS OF CEDAR AND MUSCATINE COUNTIES IN IOWA AROUND 5 15 OR 5 30 PM. STRONG GUSTY WINDS OF 60 TO 70 MPH AND HEAVY RAINFALL WERE ACCOMPANYING THESE STORMS. ANOTHER NEW AREA OF THUNDERSTORMS HAS DEVELOPED OVER SOUTHERN CLINTON COUNTY IOWA SINCE 4 PM. THESE THUNDERSTORMS APPEAR TO BE MOVING EAST AT ABOUT 35 MPH. DICKEY
Special weather statement, Sep 12, 4:29 PM CDT, 49 minutes before
IAZ008-ILZ001-WIZ018-122230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DUBUQUE IA 429 PM CDT THU SEP 12 1991 ...SEVERE THUNDERSTORM WATCH FOR MOST OF TRI-STATE AREA UNTIL 900 PM CDT... AT 430 PM CDT...THUNDERSTORMS CONTINUED TO MOVE CLOSER TO THE WESTERN PART OF THE TRI-STATE AREA. SOME OF THE THUNDERSTORMS WERE PRODUCING SEVERE WEATHER. THE STORMS WERE LOCATED 60 MILES SOUTHWEST AND WEST OF DUBUQUE MOVING EAST AT 50 MILES AN HOUR...WHICH WILL BRING THEM INTO THE WESTERN PART OF THE TRI-STATE AREA AROUND 500 PM IF NOT SOONER. PERSONS IN THE TRI-STATE AREA SHOULD BE ALERT FOR THESE THUNDERSTORMS AND GET TO A PLACE OF SAFETY IMMEDIATELY IF THREATENING WEATHER IS SIGHTED. KOWALSKI NNNN
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 12, 4:57 PM CDT | Severe Thunderstorm Warning | DVN | Jones | 33 min |
| Sep 12, 5:03 PM CDT | Severe Thunderstorm Warning | DVN | Cedar | 57 min |
| Sep 12, 5:07 PM CDT | Severe Thunderstorm Warning | DVN | Delaware | 25 min |
| Sep 12, 5:42 PM CDT | Severe Thunderstorm Warning | DVN | Jackson | 38 min |
| Sep 12, 6:15 PM CDT | Severe Thunderstorm Warning | DVN | Clinton, Scott | 40 min |
Nearby
Tornado Warnings in Iowa, 1991Every tornado warning in 1991Tornadoes in 1991
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.