Alert archive / Illinois / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 3, NWS Quad Cities, IA

February 26, 1996Henry County, Rock Island County, Whiteside County, Illinois

NWS Quad Cities, IA issued this severe thunderstorm warning at Feb 26, 1996, 4:21 PM CST for Henry County, Rock Island County, Whiteside County, Illinois. It was in force for 54 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: Feb 26, 1996, 4:21 PM CST (22:21 UTC)
Expired: Feb 26, 1996, 5:15 PM CST
In force: 54 min
Issued by: NWS Quad Cities, IA
Area: Whole counties

Counties Henry County, IL, Rock Island County, IL, Whiteside County, IL

The radar

The Quad Cities radar (KDVN), 33 km from the middle of the area, began a volume at 22:22 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
Feb 26, 4:45 PM CST	Hail 0.75	Cambridge, IL
Feb 26, 5:00 PM CST	Hail 0.75	Cambridge, IL

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 12:00Z, 10.4 hours before the alert went out and 27 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 912 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 171 m²/s²
0-3 km storm-relative helicity: 39 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Feb 26, 1:39 PM CST, 2 hours 42 minutes earlier.

Area forecast discussion, Feb 26, 1:39 PM CST, 2 hours 42 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
120 PM CST MON FEB 26 1996

18Z MAPS DATA DEPICTED SURFACE BOUNDARY SITUATED STILL OVER SOUTHEAST
IOWA WITH 70 DEGREE AIR KNOCKING ON BRL DOORSTEP. AFTERNOON SATELLITE
IMAGERY SHOWED BREAKS IN THE OVERCAST IN THE WARM SECTOR FROM SOUTHWEST
MISSOURI TO CENTRAL ILLINOIS. STRONGEST THETA-E ADVECTION WAS EVIDENT
FROM NORTHEAST MISSOURI INTO CENTRAL ILLINOIS IN CLOSE PROXIMITY
TO BOUNDARY.

FORECAST PROBLEM TONIGHT IS TRW CHANCES.

MODELS IN GENERAL AGREEMENT THIS AFTERNOON WITH NGM INITIALIZING
QUITE WELL WITH 18Z SURFACE FEATURES. GRIDDED DATA TIME-SECTIONS
BRINGS STRONGEST INSTABILITY AND BEST LIFT INTO REGION BETWEEN
06Z-12Z. BEST QG FORCING IS EVIDENT IN THE 850-700 LAYER WITH
STRONGEST QG ASCENT THROUGH THE COLUMN NORTH ACROSS MINNESTOA AND
WISCONSIN IN VICINITY OF DEFORMATION ZONE. SURFACE LOW SHOULD PASS
OVER EASTERN IOWA BY 12Z WITH ASSOCIATED DRY PUNCH. SUGGEST CAT LIKELY
POPS TONIGHT. CURRENT SEVERE WORDING IN CHI ZONES APPEARS
PRUDENT OVERNIGHT. PROJECTED WIND PROFILES SUPPORTS SUPERCELLUR
DEVELOPEMENT WITH TORNADIC DEVELOPMENT A DISTINCT POSSIBILITY.
STAY TUNED.

CID RISING/+    DBQ RISING/+    MLnI RISING/+   BRL RISING/+

BERG

In the hours before

Local storm report, Feb 26, 3:54 PM CST, 27 minutes before

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Local storm report, Feb 26, 3:59 PM CST, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
354 PM CST MON FEB 26 1996

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

$0354 PM    RYAN                      IA   PEA SIZE HAIL
02/26/96   DELAWARE                       ON ROADS ACROSS S. DELAWARE
                                          REPORTED BY STATE TROOPERS

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 26, 3:29 PM CST	Severe Thunderstorm Warning	DVN	Delaware, Linn	61 min
Feb 26, 4:39 PM CST	Severe Thunderstorm Warning	DVN	Henry	51 min
Feb 26, 3:40 PM CST	Severe Thunderstorm Warning	DVN	Grant	65 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1996 Every severe thunderstorm warning in 1996

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.