Alert archive / Illinois / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 9, NWS Quad Cities, IA

March 27, 1998Carroll County, Illinois

NWS Quad Cities, IA issued this severe thunderstorm warning at Mar 27, 1998, 7:39 PM CST for Carroll County, Illinois. It was in force for 46 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: Mar 27, 1998, 7:39 PM CST (01:39 UTC)
Expired: Mar 27, 1998, 8:25 PM CST
In force: 46 min
Issued by: NWS Quad Cities, IA
Area: Whole counties

County Carroll County, IL

The radar

The Quad Cities radar (KDVN), 74 km from the middle of the area, began a volume at 01:43 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Mar 27, 8:12 PM CST	Thunderstorm Wind 58	Savanna, IL	Trees and power lines were down across Route 40 East of Savanna.
Mar 27, 8:16 PM CST	Thunderstorm Wind 60	Savanna, IL	Large blown down tree was blocking Wacker Road.

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.

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 1.7 hours before the alert went out and 68 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 36 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 1607 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 117 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

924 
WUUS1 KMLI 280140 RRA
SVRMLI
IAC055-061-097-ILC015-280225-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
739 PM CST FRI MAR 27 1998

* SEVERE THUNDERSTORM WARNING FOR
  DELAWARE COUNTY - NORTHEASTERN IOWA
  DUBUQUE COUNTY - NORTHEASTERN IOWA
  JACKSON COUNTY - EAST CENTRAL IOWA
  CARROLL COUNTY - NORTHWESTERN ILLINOIS

* UNTIL 825 PM CST
 
* SOME LOCATIONS AFFECTED
  MANCHESTER
  DYERSVILLE
  DUBUQUE
  MAQUOKETA
  BELLEVUE
  SAVANNA
  MT CARROLL

* AT 739 PM CST RADAR INDICATED A SEVERE THUNDERSTORM 20 MILES
  SOUTH OF MANCHESTER TO 30 SOUTH OF DUBUQUE TO 10 SOUTH OF
  MAQUOKETA TO 30 MILES SOUTH OF MT CARROLL MOVING NORTH AT 50 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR .....

DAMAGING WINDS OVER 80 MPH ARE LIKELY GO INSIDE A
STURDY BUILDING AND STAY AWAY FROM WINDOWS.



MEYER

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.

NWS Quad Cities, IA wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 27, 1:51 PM CST, 5 hours 48 minutes earlier.

Area forecast discussion, Mar 27, 1:51 PM CST, 5 hours 48 minutes before

AREA FORECAST DISCUSSION...CORRECTION TO ADD STATIONS TO BOTTOM
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
151 PM CST FRI MAR 27 1998

THE 18Z 1000 METER PROFILER CONTINUES TO SHOW 40 TO 50 KNOT SOUTH TO
SOUTHWEST WINDS OVER MO...AR AND OK.  THE 300MB PROFILER SHOWS SOME
NICE DIVERGENCE OVER EASTERN NE AND WESTERN MO.  THE 18Z SURFACE
ANALYSIS SHOWS LOW PRESSURE OVER NORTHWEST WISCONSIN AND THE AMIN LOW
PRESSURE OVER CENTRAL KASNAS.  WATCH BOX ISSUED FOR SOUTHERN MO
NORTHERN AR IN ASSOCIATION WITH LINE OF THUNDERSTORMS WESTRN MISSOURI.
SATELLITE INDICATES SOME SHOWERS TRYING TO DEVELOP OVER SOUTHWEST
MISSOURI AND AS THE DAY   PROGRESSES THIS SHOULD BE OUR SOURCE REGION
FOR RAIN AND THUNDERSTORMS...SOME POSSIBLY CREATING VERY STRONG WINDS.
THIS CREATES THE MAIN PROBLEM FOR TONIGHT AND TOMORROW...HOW MUCH RAIN
AND WHETHER OR NOT ANY SEVERE WEATHER WILL OCCUR.

MOS AND FAN GUIDANCE BOTH AT 90%+ POPS FOR TONIGHT AND THIS SEEMS TO
MAKE SENSE.  THE SHOWERS DEVELOPING OVER SOUTHWEST MISSOURI SHOULD
BECOME A LINE OF STRONG TO SEVERE THUNDERSTORMS.  THE BEST CHANCE FOR
SEVERE THUNDERSTORMS APPEARS TO BE OVER CENTRAL MISSOURI AND NORTHERN
ARKANSAS BUT SOME SEVERE WEATHER IS POSSIBLE AS FAR NORTH AS I-80.  A
TON OF PVA AT 500MB MOVES THROUGH THE AREA OVERNIGHT ALONG WITH A 30
VORT MAX.  THE BEST LAPSE RATES REMAIN IN MISSOURI HOWEVER A GOOD COLD
CORE OF AIR AT 500MB WILL MOVE INTO THE AREA TONIGHT.

THE 18Z WIND SPEEDS SLIGHTLY BELOW WIND ADVISORY CRITERIA SO WILL
PROBABLY LET IT EXPIRE THIS AFTERNOON.  BOTH NGM AND ETA SEEM TO HAVE
A DECENT HANDLE ON CURRENT SITUATION SO WILL LOOK FOR RAIN AND
THUNDERSTORMS TO SWEEP THROUGH THE AREA...SOME POSSIBLY WITH STRONG
WINDS.  BOTH MODELS HOLD ON TO SOME LOW LEVEL MOISTURE TOMORROW
MORNING SO SOME SHOWERS POSSIBLE EARLY WITH LINGERING LOW AND MID
LEVEL CLOUDS.

CID 52/80   DBQ 50/80    MLI 55/90   BRL 55/100

WEISSER

In the hours before

Local storm report, Mar 27, 6:41 PM CST, 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
641 PM CST FRI MAR 27 1998

TIME(CST)  .....CITY LOCATION.....   ST   ...EVENT/REMARKS...
DATE(CST)  ....COUNTY LOCATION....

0630 PM    ROSEVILLE                 IL   WIND DAMAGE
03/27/98   WARREN                         GRAIN BIN BLOWN OVER

0634 PM    MONMOUTH                  IL   WIND DAMAGE
03/27/98   WARREN                         WINDOW BLOWN OUT AT COUNTY
                                          JAIL

JDH

Local storm report, Mar 27, 6:41 PM CST, 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
641 PM CST FRI MAR 27 1998

TIME(CST)  .....CITY LOCATION.....   ST   ...EVENT/REMARKS...
DATE(CST)  ....COUNTY LOCATION....

0630 PM    ROSEVILLE                 IL   WIND DAMAGE
03/27/98   WARREN                         GRAIN BIN BLOWN OVER

0634 PM    MONMOUTH                  IL   WIND DAMAGE
03/27/98   WARREN                         WINDOW BLOWN OUT AT COUNTY
                                          JAIL

JDH

Local storm report, Mar 27, 7:00 PM CST, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
700 PM CST FRI MAR 27 1998

TIME(CST)  .....CITY LOCATION.....   ST   ...EVENT/REMARKS...
DATE(CST)  ....COUNTY LOCATION....

0630 PM    WAPELLO                   IA   WIND DAMAGE
03/27/98   LOUISA                         LARGE TREE LIMBS DOWN AND
                                          POWER OUTAGES

0649 PM    ALEDO                     IL   WIND DAMAGE
03/27/98   MERCER                         NUMEROUS TREES BLOWN DOWN
                                          POWER POLE DOWN

0655 PM    MUSCATINE                 IA   58 MPH WIND GUST
03/27/98   MUSCATINE

0700 PM    WILTON                    IA   WIND DAMAGE
03/27/98   MUSCATINE                      ROOF BLOWN OFF HOUSE

JDH

Local storm report, Mar 27, 7:00 PM CST, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
700 PM CST FRI MAR 27 1998

TIME(CST)  .....CITY LOCATION.....   ST   ...EVENT/REMARKS...
DATE(CST)  ....COUNTY LOCATION....

0630 PM    WAPELLO                   IA   WIND DAMAGE
03/27/98   LOUISA                         LARGE TREE LIMBS DOWN AND
                                          POWER OUTAGES

0649 PM    ALEDO                     IL   WIND DAMAGE
03/27/98   MERCER                         NUMEROUS TREES BLOWN DOWN
                                          POWER POLE DOWN

0655 PM    MUSCATINE                 IA   58 MPH WIND GUST
03/27/98   MUSCATINE

0700 PM    WILTON                    IA   WIND DAMAGE
03/27/98   MUSCATINE                      ROOF BLOWN OFF HOUSE

JDH

Local storm report, Mar 27, 7:37 PM CST, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
737 PM CST FRI MAR 27 1998

TIME(CST)  .....CITY LOCATION.....   ST   ...EVENT/REMARKS...
DATE(CST)  ....COUNTY LOCATION....

0710 PM    PREEMPTION                IL   WIND DAMAGE
03/27/98   MERCER                         NUMEROUS POWER POLES DOWN
                                          BARN BLOWN OVER

0700 PM    1 N MUSCATINE             IA   WIND DAMAGE
03/27/98   MUSCATINE                      SEMI TRUCK BLOWN OVER

0715 PM    DAVENPORT                 IA   60 MPH WIND GUST
03/27/98   SCOTT                          TV STATION WIND INSTRUMENT
                                          RECORDED GUST

0722 PM    GENESEO                   IL   70 MPH WIND GUST
03/27/98   HENRY

JDH

Local storm report, Mar 27, 7:37 PM CST, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
737 PM CST FRI MAR 27 1998

TIME(CST)  .....CITY LOCATION.....   ST   ...EVENT/REMARKS...
DATE(CST)  ....COUNTY LOCATION....

0710 PM    PREEMPTION                IL   WIND DAMAGE
03/27/98   MERCER                         NUMEROUS POWER POLES DOWN
                                          BARN BLOWN OVER

0700 PM    1 N MUSCATINE             IA   WIND DAMAGE
03/27/98   MUSCATINE                      SEMI TRUCK BLOWN OVER

0715 PM    DAVENPORT                 IA   60 MPH WIND GUST
03/27/98   SCOTT                          TV STATION WIND INSTRUMENT
                                          RECORDED GUST

0722 PM    GENESEO                   IL   70 MPH WIND GUST
03/27/98   HENRY

JDH

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 27, 6:20 PM CST	Severe Thunderstorm Warning	DVN	Henderson, Warren	60 min
Mar 27, 6:35 PM CST	Severe Thunderstorm Warning	DVN	Mercer	50 min
Mar 27, 6:48 PM CST	Severe Thunderstorm Warning	DVN	Henry, Rock Island	47 min
Mar 27, 7:16 PM CST	Severe Thunderstorm Warning	DVN	Whiteside	44 min
Mar 27, 7:28 PM CST	Severe Thunderstorm Warning	DVN	Bureau, Putnam	47 min
Mar 27, 8:02 PM CST	Severe Thunderstorm Warning	DVN	Jo Daviess	48 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1998 Every severe thunderstorm warning in 1998

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; radar from the NEXRAD Level II archive.